USRE40605E1 - Cutting apparatus for window coverings and methods therefor - Google Patents
Cutting apparatus for window coverings and methods therefor Download PDFInfo
- Publication number
- USRE40605E1 USRE40605E1 US11/322,201 US32220105A USRE40605E US RE40605 E1 USRE40605 E1 US RE40605E1 US 32220105 A US32220105 A US 32220105A US RE40605 E USRE40605 E US RE40605E
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- US
- United States
- Prior art keywords
- cutting
- window covering
- rail
- cutting surface
- slats
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime, expires
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D23/00—Machines or devices for shearing or cutting profiled stock
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/266—Devices or accessories for making or mounting lamellar blinds or parts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S83/00—Cutting
- Y10S83/929—Particular nature of work or product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/39—Venetian blind assembling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/04—Processes
- Y10T83/0476—Including stacking of plural workpieces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/748—With work immobilizer
- Y10T83/7593—Work-stop abutment
- Y10T83/76—With scale or indicator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8821—With simple rectilinear reciprocating motion only
- Y10T83/8841—Tool driver movable relative to tool support
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8821—With simple rectilinear reciprocating motion only
- Y10T83/8854—Progressively cutting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8821—With simple rectilinear reciprocating motion only
- Y10T83/8857—With inclined guides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9411—Cutting couple type
- Y10T83/9447—Shear type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9454—Reciprocable type
Definitions
- the present invention relates generally to the art of window coverings and more specifically relates to cutting machines and methods for cutting window coverings to specified lengths.
- window coverings such as draperies, curtains, venetian blinds and shades. These window coverings generally extend horizontally across a window opening and are typically sized to accommodate the dimensions of the window opening.
- One popular type of window covering is a window shade having a head rail, a bottom rail and a window covering material between the head rail and the bottom rail.
- Common window covering materials include slats, such as PVC slats, or fabric.
- slats such as PVC slats, or fabric.
- One problem with such window shades is that the width of the head rail, the bottom rail and the window covering material must be customized to match the exact dimensions of the window opening.
- a number of options have been developed so that consumers may obtain customized window shades which are sized to fit a specific window opening.
- a customer typically visits a specialty shop or department store and places an order for customized window shades.
- This option requires the customer to first measure the window opening and submit the measurements to a salesperson. The salesperson will then submit the order to a factory or distribution center where the window shade is cut to the specified length.
- This option is rather time consuming, because the customer must make at least two visits to the retail outlet in order to obtain the customized product, i.e. a first visit to place the order and a second visit to pick up the product.
- this particular option is relatively expensive.
- a second option involves selecting the window shade from a stock of pre-sized shades maintained at the retail establishment. Typically, only certain standard sizes are carried because some window openings, especially in newer homes and offices, are of standard dimensions. These pre-stocked, standardized window shades are usually much less expensive than those obtained from custom specialty shops because stocked shades may be mass-produced in an economical manner. In addition, the cost to the consumer is reduced because there is no need to perform a cutting or sizing operation at the retail establishment.
- a third option has recently evolved. This particular option involves the in-store sizing or cutting of the window shades to match the exact window dimensions specified by the customer.
- Various machines and methods for performing these tasks are disclosed in U.S. Pat. Nos. 5,339,716; 5,037,253; 5,456,149; 4,993,131; 5,072,494 and 5,103,702.
- These various disclosures have been generally inadequate at providing systems for efficiently and accurately sizing window shades to specified lengths.
- most of the systems disclosed are too complex to be operated by a typical retail salesperson having an average degree of training.
- many of these systems require numerous steps in order to cut the window shade, i.e. the head rail is cut in a first cutting operation and the window covering material is cut in a second cutting operation.
- these systems, and particularly the cutting blades of these systems exert a tremendous amount of force upon the window shade being cut which often results in the cut ends of the shades being uneven, chipped or cracked. These defects produce a final product of inferior quality.
- a cutting apparatus for window shades capable of efficiently customizing window shades to fit window dimensions specified by customers.
- a cutting apparatus for cutting a window shade to a specified length, whereby the entire window shade, namely the head rail, the bottom rail and the window covering material are all cut simultaneously in a single cutting stroke, thereby saving time and reducing operator errors.
- the cutting apparatus should produce a final product having a high-quality, professionally-cut appearance. Applicant is presently the exclusive licensee of such an improved cutting machine which is disclosed in U.S. patent application Ser. No. 08/627,015 entitled “End Trimming Device For Blinds”, the disclosure of which is hereby incorporated by reference herein. Another improved cutting device is sold by the Applicant, Springs Window Fashions, under the trademark “Crystal Pleat Cut-Down Machine.”
- a cutting apparatus for cutting a window shade to a specified length.
- the window shade preferably includes a head rail, a bottom rail and a window covering material or covering material.
- the window covering material or covering material typically includes a fabric or slats provided between the head rail and the bottom rail.
- the head rail and the bottom rail preferably comprise a substantially rugged material, such as extruded plastic, which can be readily cut to specified lengths.
- the cutting apparatus preferably includes a base having a top or cutting surface and a frame overlying the cutting surface of the base.
- the frame is preferably mounted to the base to form a rigid structure.
- the frame and the cutting surface define a receiving area therebetween for receiving one or more window shades which will be cut in the cutting apparatus.
- a cutting assembly is slidably mounted to the frame for sliding along a movement axis toward and away from the receiving area.
- the frame preferably includes one or more guide tracks which are angled with respect to the cutting surface of the base and the cutting assembly is slidably mounted in the guide tracks so that the movement axis is diagonal to the cutting surface of the base.
- the cutting assembly includes a cutting blade having a cutting edge facing the receiving area.
- the cutting apparatus also includes a mechanical element, such as a driver, which may be operated to impart sliding motion to the cutting assembly.
- the driver may include a rack and pinion gear arrangement, a ratcheting mechanism, a screw-activated element, a pneumatic element or an electrical-motor operated device.
- the cutting assembly includes a rack having a plurality of teeth.
- a pinion having a plurality of teeth at a periphery thereof, is rotatably mounted in the frame. The pinion is matingly engaged with the rack so that when the pinion is rotated, the pinion imparts sliding motion to the cutting assembly to move the cutting blade diagonally through the receiving area for cutting the window shade to the specified length. As the cutting blade moves toward and away from the cutting surface, the cutting edge remains at all times substantially parallel to the top of the cutting surface.
- the base may include a support guide, provided over the cutting surface thereof, for guiding movement of the window shade across the cutting surface of the base and towards the receiving area.
- the support guide includes a mandrel which engages at least one of the head rails or bottom rails and which most preferably engages the head rail during cutting operations.
- the mandrel extends along the cutting surface of the base from a first end of the cutting surface to a second end of the cutting surface. The second end of the cutting surface is preferably adjacent the cutting blade.
- the base includes a clamp assembly for securing the window shade over the cutting surface of the base.
- the clamp preferably includes a clamp block having a threaded bore, a threaded shaft which is capable of being rotated and a crank handle.
- the threaded shaft has a first end which is threadably connected to the clamp block and a second end which is rotatably connected to the crank handle. Rotation of the crank handle moves the clamp block into and out of engagement with the window shade.
- the crank handle is preferably rotated in a clockwise or counter-clockwise direction so as to apply a clamping force to the window shade.
- the clamp may include a pneumatic device, an electrically operated device, a screw device, a ratcheting device or a weight.
- the cutting blade is preferably provided at the second end of the cutting surface and has a longitudinal axis which is substantially perpendicular to the longitudinal axis of the guide rail.
- the cutting blade has a first face which is substantially flat and a second face which includes a pocketed portion.
- the pocketed portion of the cutting blade is preferably the only section of the blade which engages and cuts the window shade.
- the pocket is substantially thinner than the area of the cutting blade which surrounds the pocket.
- the pocketed portion includes a tapered region which is contiguous with the cutting edge and which extends up and away from the cutting edge.
- the tapered region has a first tapered section or bevel which extends from the cutting edge.
- the first tapered section and the substantially flat first face define a first acute angle.
- the tapered region includes a second tapered section which extends from the first tapered section.
- the second tapered section and the substantially flat first face define a second acute angle which is smaller than the first acute angle.
- the substantially flat first face of the cutting blade preferably faces upstream toward the first end of the top surface of the base while the second face (i.e. the face including the pocketed portion) preferably faces downstream and away from the first end of the top surface.
- the cutting blade preferably includes any material, man-made or naturally occurring, having the strength and/or durability to efficiently cut through the shade assembly, and more preferably includes carbide steel or diamond.
- the cutting apparatus also preferably includes a measuring assembly adjacent and/or downstream from the cutting blade for measuring the window shade.
- the measuring assembly provides a measuring tool for defining the exact length of the end portion of the window shade to be cut.
- the measuring assembly preferably includes a stop block which abuts against the end portion of the window shade.
- the stop block is connected to a cam follower which in turn is connected to the pinion so that the stop block moves away from the end of the window shade as the cutting blade slices through the window shade.
- the stop block allows the cut end portion of the window shade to pivot away from the cutting blade which minimizes the forces exerted by the cutting blade upon the window shade.
- the stop block is movable between a first position and a second position. In the first position, the stop block abuts against the end portion of the window shade. In the second position the stop block is not in contact with the end portion of the window shade because the stop block cams away from the end portion.
- a method of cutting the window shade includes providing a cutting apparatus having a receiving area for receiving the window shade whereby the cutting apparatus includes a cutting blade slidably mounted therein for sliding along a movement axis toward and away from the receiving area.
- the window shade is provided in the receiving area and the cutting blade is passed diagonally through the receiving area and the window shade for cutting off an end portion of the window shade to provide a window shade having a specified length.
- the window shade is inserted into the first end of the cutting apparatus and slid along a cutting surface of the base toward the cutting blade so that the cutting blade overlies the end portion of the window shade which is to be cut.
- the measuring assembly is then utilized to determine the exact length of the end portion of the window shade being cut.
- the crank handle of the clamping assembly is rotated so that the clamping block moves into engagement with the window shade so as to secure the window shade between the clamp block and the guide rail.
- the crank continues to be rotated until the clamping block has secured the window shade over the cutting surface of the base.
- the pinion is then rotated to move the cutting assembly.
- a lever handle is preferably connected to the pinion to facilitate rotation of the pinion. Rotation of the pinion slides the cutting assembly in the angled guide tracks along the movement axis which is diagonal to the cutting surface of the base so that the cutting blade slices diagonally through the window shade.
- the stop block cams away from the end portion of the window shade being cut so that the cut end portion is free to pivot away from the cutting blade. Because the end of the window shade being cut is free to pivot away from the blade, the compression forces exerted by the cutting blade upon the window shade are greatly reduced which greatly reduces the likelihood that the head rail or the bottom rail will crack while being cut.
- the direction of the lever handle is preferably reversed to return the cutting blade to its initial position. The measuring assembly moves back towards the cutting blade as the handle is returned to its initial start position. At this point the window shade may be removed from the cutting apparatus. In certain instances it may be preferable to trim or cut a second end of the window shade to a specified length. This may be accomplished by inserting the second end of the window shade into the cutting apparatus and repeating the steps described above.
- FIG. 1 shows an exploded perspective view of a cutting apparatus for cutting a window shade to a desired length according to one preferred embodiment of the present invention.
- FIG. 2A shows a front view of the cutting apparatus shown in FIG. 1 .
- FIG. 2B shows a right side view of the cutting apparatus shown in FIG. 2 A.
- FIG. 3A shows a perspective front view of one preferred window shade cut to a specified length in the cutting apparatus shown in FIG. 1 .
- FIG. 3B shows a side view of the window shade shown in FIG. 3 A.
- FIG. 4A shows a top view of a base of the cutting apparatus shown in FIG. 1 according to one preferred embodiment of the present invention.
- FIG. 4B shows a right side view of the base shown in FIG. 4A along the sectional line designated 4 B— 4 B in FIG. 4 A.
- FIG. 5A shows a fragmentary view of a face of a cutting blade of the cutting apparatus shown in FIG. 1 according to certain preferred embodiments of the present invention.
- FIG. 5B shows a fragmentary side view of the cutting blade shown in FIG. 5A along the sectional line designated 5 B— 5 B in FIG. 5 A.
- FIG. 5C shows a cross-sectional fragmentary side view of the cutting blade shown in FIG. 5A along the sectional line designated 5 C— 5 C in FIG. 5 A.
- FIG. 5D shows a cross-sectional fragmentary side view of a pocket portion of the cutting blade shown in FIG. 5 A.
- FIG. 6A shows a fragmentary top view of the window shade shown in FIG. 3A after the window shade has been inserted into the cutting apparatus of FIG. 1 .
- FIG. 6B shows a cross-sectional end view of the window shade and cutting apparatus shown in FIG. 6 A.
- FIG. 7A shows a simplified view of FIG. 6B with the cutting blade initially contacting the window shade in accordance with certain preferred embodiments of the present invention.
- FIG. 7B shows the cutting blade of FIG. 7A during a further stage of a cutting operation.
- FIG. 7C shows the cutting blade of FIG. 7B during a still further stage of the cutting operation.
- FIG. 8B shows a fragmentary side view of FIG. 7 C.
- the cutting apparatus 20 preferably includes a base 22 having a substantially flat cutting surface 24 and a frame 26 which overlies the substantially flat cutting surface 24 of the base 22 .
- the frame 26 is mounted to the base 22 so that the frame 26 and the base 22 form a substantially rigid structure.
- the frame 26 includes guide tracks 28 A and 28 B which are angled with respect to the cutting surface 24 of the base 22 .
- the angle formed by the guide tracks 28 A, 28 B and the cutting surface 24 is preferably between one to 89 degrees.
- a cutting assembly 30 including a cutting blade 32 is slidably mounted in the guide tracks 28 A and 28 B and moves along a movement axis designated A—A which is diagonal to the cutting surface 24 of the base 22 .
- the cutting surface 24 of the base 22 and the frame 26 define an aperture or receiving area 34 into which an end portion of a window shade is preferably inserted in order to be cut by the cutting apparatus 20 .
- the cutting apparatus 20 is preferably capable of cutting entirely through the end of the window shade with a single pass of the cutting blade 32 .
- the terms “top”, “bottom”, “front”, “side”, “first” and “second” are used herein to indicate directions relative to the cutting apparatus itself. It should be understood that these terms are used to refer to the frame of reference of the apparatus itself, and not to the ordinary, gravitational frame of reference.
- one preferred window shade 36 capable of being cut by the cutting apparatus 20 described above includes a headrail 38 , a bottom rail 40 and window covering material 41 therebetween.
- the head rail 38 and the bottom rail 40 preferably include an extruded plastic material.
- the window covering material 41 may include a fabric, such as a point bonded polyester blend material, or may include slats which generally comprise a somewhat flexible material, such as polyvinyl chloride (PVC).
- PVC polyvinyl chloride
- the top portion of the head rail 38 has a “C”-shaped opening 42 which may be used for securing the shade 36 to a window opening or for rigging the window shade 36 with control lines.
- the head rail 38 also preferably includes a lower “C”-shaped opening 46 for securing a top section of the window covering material 41 .
- the bottom rail 40 also has a “C”-shaped opening 50 for receiving and securing a bottom section of the window covering material 41 .
- the window shade 36 also includes removable end caps 44 at the ends of the head rail 38 and the base rail 40 .
- the base 22 generally includes a hardened steel.
- the cutting surface 24 of the base 22 preferably has a first end 52 which initially receives the window shade 36 and a second end 54 which is adjacent the cutting blade (FIG. 2 A).
- a safety guard 56 designated the left hand guard, preferably overlies the first end 52 of the cutting surface 24 so as to prevent an operator from placing his or her hands under the cutting blade 32 .
- the hand guard 56 preferably comprises a hardened, rugged material such as a metal or a clear plastic material, such as Lexan, Plexiglas or Acrylic.
- the base 22 preferably includes a guide rail 58 which overlies the cutting surface 24 and extends from the first end 52 of the cutting surface 24 to the second end 54 thereof.
- the guide rail 58 serves to align the head rail 38 over the cutting surface 24 of the base 22 and guide the head rail 38 over the cutting surface 24 .
- the guide rail 58 is preferably a mandrel shaped to fit relatively snugly within the “C”-shaped opening 42 at the top of the headrail 38 .
- the base 22 also includes a clamping assembly for securing the window shade 36 to the cutting surface 24 of the base 22 prior to cutting the window shade 36 .
- the clamping assembly includes a clamp block 60 extending over the cutting surface 24 in a longitudinal direction which is substantially parallel to the guide rail 58 .
- the clamp block 60 preferably moves independently of the base and is attached to a sliding portion 62 provided in a slot 64 cut into the cutting surface 24 of the base 22 so that the clamp block 60 may slide towards and away from the guide rail 58 .
- the clamp block 60 is connected to a threaded block 66 having a threaded bore therein.
- the threaded block 66 is preferably rigidly connected to the base 22 so that the threaded block does not move independently of the base 22 .
- the clamping assembly also includes a rotatable, threaded shaft 68 having a first end 70 which is connected to the clamp block 60 and a second end 72 which is rotatably connected to a crank handle 74 .
- Rotation of the crank handle 74 rotates the threaded shaft 68 which in turn moves the clamping block 60 toward and away from the guide rail 58 .
- the top surface 24 of the base 22 preferably includes a backup 76 which opposes the cutting blades 32 .
- the backup 76 is preferably located at the second end 54 of the cutting surface 24 of the base 22 and extends slightly beyond the second end 54 of the cutting surface 24 . In certain preferred embodiments the backup 76 extends between approximately 1/32 inch and 3/32 inch beyond the second end 54 .
- the backup 76 preferably includes a hardened material, such as a nylon material, which is relatively softer than the material comprising the cutting blade 32 , so that the backup is stiff enough to adequately support the window shade 36 and so that the cutting blade 32 is not prematurely dulled when it repeatedly abuts against the backup 76 during cutting operations.
- the frame 26 includes guide tracks 28 A and 28 B which are angled relative to the cutting surface 24 of the base 22 .
- the cutting assembly 30 is slidably mounted in the guide tracks 28 A and 28 B and is capable of sliding within the guide tracks 28 A and 28 B along the movement axis designated A—A.
- the movement axis A—A has both a downward vertical component (Y-axis) and a horizontal component (X-axis).
- the movement axis A—A is diagonal with respect to the cutting surface 24 of the base 22 so that the cutting blade 32 moves along both the y axis and x axis with respect to the cutting surface 24 .
- the cutting assembly 30 preferably includes a rack 78 having a plurality of teeth 80 so that the cutting assembly 30 may be operated using a rack and pinion mechanism.
- a driver such as a pinion 82 having a plurality of teeth 84 is rotatably mounted in the frame 26 and is matingly engaged with the rack 78 so that the teeth 84 of the pinion 82 mesh with the teeth 80 of the rack 78 .
- a lever handle 86 is connected to the pinion 82 and preferably has considerable length for providing leverage so that the pinion 82 may be readily rotated by an operator. As the pinion 82 rotates, the teeth 84 of the pinion 82 mesh with the teeth 80 of the rack 78 so as to impart sliding motion to the cutting assembly 30 and move the cutting assembly 30 within the guide tracks 28 A and 28 B.
- a safety pin 88 is provided at an exterior surface of the frame 26 .
- the safety pin 88 meshes with the pinion 82 so that the handle 86 cannot move until the safety pin 88 is retracted.
- the safety pin 88 is provided on one side of the frame 26 and the handle 86 is provided on an opposite side of the frame 26 . This particular design feature ensures that an operator's hands will not be positioned under the cutting blade 32 during a cutting operation because one of the operator's hands must retract the safety pin 88 while the other hand is pulling the handle 86 .
- the handle 86 is preferably pulled downward towards the operator so as to rotate the pinion 82 .
- the cutting blade 32 is relatively massive and has a cutting edge 90 which faces the window shade to be cut.
- the cutting blade 32 includes carbide steel.
- the cutting edge 90 of the cutting blade 32 may include diamond.
- the cutting blade 32 includes a first face 92 which is substantially flat.
- the cutting blade 32 also has a second face 94 remote from the first face 92 .
- the second face 94 includes a concave pocket 96 cut into the second face 94 .
- the thickness of the pocketed portion 96 of the cutting blade 32 is substantially thinner than the remaining portion of the blade which surrounds the pocketed portion. For example, as shown in FIG.
- upper portion 98 of the cutting blade 32 i.e. the massive portion surrounding the pocket 96
- the pocket 96 preferably includes a tapered section which tapers outwardly from the cutting edge 90 of the blade 32 .
- the pocket 96 of the blade 32 becomes thicker as the distance from the cutting edge 90 increases.
- the thickness of the pocket 96 always remains less than the thickness of the massive portion 98 of the blade 32 .
- the massive portion 98 of the cutting blade 32 stabilizes the blade 32 and prevents the cutting edge 90 from flexing and bowing during a cutting operation which could result in an erratic cut line which is not vertical.
- the pocketed portion 96 is preferably the only portion of the blade 32 which engages the end portion of the shade 36 being cut. Thus, the pocketed portion 96 enables the blade 32 to effectively slice through the window shade 36 because the pocketed portion 96 is relatively thin.
- pocketed portion 96 preferably includes a tapered region having a first tapered section 100 or bevel which extends up and away from the cutting edge 90 of the blade 32 .
- the beveled section 100 and the first face 92 of the cutting blade 32 form a first acute angle designated A 1 .
- the pocket 96 also includes a second tapered section 104 which extends up and away from the beveled section 100 .
- the second tapered section 104 and the first face 92 of the cutting blade 32 form a second acute angle designated A 2 which is smaller than the first acute angle designated A 1 .
- the cutting apparatus 20 also preferably includes a measuring assembly generally designated as 108 for measuring the end portion of the window shade being cut.
- the measuring assembly includes a guard, hereinafter referred to as right hand guard 110 , which prevents an operator from placing his or her hands under the cutting blade 32 .
- the right hand guard 110 includes a removable end plate 112 remote from the cutting blade 32 which provides access to an area of the cutting apparatus 20 immediately downstream from the cutting blade 32 .
- the right hand guard 110 preferably includes a rugged, but clear material which enables an operator to observe the cutting operation, such as Lexan, Plexiglas or Acrylic.
- the measuring assembly 108 includes a measuring instrument 114 , such as a ruler, which is permanently attached to the right hand guard 110 for measuring the end portion of the window shade being cut.
- the ruler 114 is preferably attached to the underside of the right hand guard 110 and is visible through the right hand guard 110 .
- the guard 110 includes two sots 116 A and 116 B on opposite sides thereof which extend horizontally away from the cutting blade 32 .
- a stop block 118 is slidably mounted in the slots 116 A and 116 B and is movable toward and away from the cutting blade 32 .
- the stop block 118 includes a stop knob 120 at one side thereof which can be hand tightened to secure the stop block 118 in place within the slots 116 A and 116 B.
- the stop block 118 preferably underlies the ruler 114 so that the length of the end portion of the window shade being cut can be accurately measured by aligning the stop block 118 with a certain spot on the ruler. For example, if a customer requests that two inches be cut off from one end of the window shade, then the stop block 118 is moved to a position two inches away from the cutting blade 32 , as indicated by the ruler 114 . Once the stop block 118 has been positioned at the desired distance from the cutting blade 32 , the stop knob 120 is hand-tightened to secure the stop block 118 in place.
- the stop block 118 and preferably the entire measuring assembly 108 , is connected to a cam follower 122 .
- the cam follower 122 is interconnected with the pinion 82 so that the entire measuring assembly 108 including the stop block 118 cams away from the cutting blade 32 as the cutting blade slices through an end portion of the window shade. Because the stop block 118 cams away, the end of the window shade 36 being cut is able to freely pivot down and away from the cutting blade 32 , thereby reducing the compression force exerted by the blade 32 upon the window shade.
- a cam collar 124 is connected to the pinion 82 for rotating with the pinion.
- the cam collar 124 has a groove 126 formed on the outer periphery thereof.
- the cam follower 122 is positioned within the groove 126 for interconnecting the cam collar 124 and the measuring assembly 108 .
- the cam follower 122 moves through the groove 126 in the cam collar 124 .
- the groove 126 guides the cam follower 122 away from the cutting blade 32 which causes the measuring assembly 108 and the stop block 118 to cam away from the cutting blade 32 .
- the cutting apparatus 20 will preferably be located in a retail store so that customers may have window shades efficiently and economically cut to specified lengths.
- the cutting apparatus 20 will preferably be provided over a supporting element, such as a table.
- the cutting apparatus 20 will preferably be bolted or firmly secured to the table.
- the table may have an opening adjacent and/or downstream from the cutting blade 32 so the cut end portion of the window shade 36 can fall through the opening and into a waste container.
- a customer desiring window shades cut to a specified length will provide a salesperson (hereinafter referred to as the “operator”) with the dimensions of one or more window openings.
- the operator may then refer to a chart, typically provided by the manufacturer of the window shades, in order to select a particular pre-stocked shade to be cut.
- a chart typically provided by the manufacturer of the window shades, in order to select a particular pre-stocked shade to be cut.
- the manufacturer will provide anywhere from five to ten, or even more, different models of shades.
- the manufacturer's chart may also provide the operator with information concerning how many inches or feet must be cut off one or both ends of the window shade.
- the end 128 of the window shade 36 to be cut is preferably positioned at the first end 52 of the cutting surface 24 of the base 22 .
- the window shade 36 is preferably aligned over the top surface 24 so the head rail 38 faces the guide rail 58 or mandrel and the base rail 40 faces the clamp block 60 .
- the “C”-shaped opening 42 at the top of the head rail 38 is aligned with and slid over the mandrel 58 , whereupon the head rail 38 is deemed to be captured by the mandrel.
- the window shade 36 is moved or inserted toward the second end 54 of the cutting surface 24 and the stop block 118 .
- the window shade 36 continues to be inserted into the cutting apparatus 20 until the end portion 128 of the window shade 36 abuts against the stop block 118 .
- the cutting blade 32 overlies the end portion 128 of the window shade 36 .
- the operator After the window shade 36 has been fully inserted into the cutting apparatus 20 and abutted against the stop block 118 , the operator firmly secures the window shade 36 in place over the top surface 24 using the clamping assembly.
- the operator rotates the crank handle 74 , preferably in a clockwise direction, which rotates the shaft, which in-turn causes the clamp block 60 to move toward the window shade 36 and the mandrel 58 .
- the operator continues to hand-tighten the crank handle 74 until the clamp block 60 abuts against the base rail 40 and compresses the window shade 36 between the clamp block 60 and the mandrel 58 .
- the operator may cut the end 128 of the window shade 36 .
- the safety pin 88 in the frame 26 must be retracted so as to free the pinion 82 for rotation.
- the handle 86 is preferably rotated downward toward the operator which rotates the pinion 82 .
- the teeth 84 of the pinion 82 mesh with the teeth 80 of the rack 78 to move the cutting assembly 30 downward within the angled guide tracks 28 A and 28 B.
- the cutting blade 32 moves along the movement axis designated A—A in a direction which is diagonal to the top cutting surface 24 of the base 22 and the window shade 36 .
- the cutting blade moves in a direction which has both vertical (y-axis) and horizontal (x-axis) components. Because the cutting blade 32 moves diagonally with respect to both the cutting surface 24 of the base 22 and the window shade 36 secured thereto, the cutting blade 32 slices through the window shade 36 in a diagonal direction.
- This slicing action as opposed to an entirely vertical cut (Y-axis) or chopping action, greatly reduces the compression forces exerted by the blade 32 upon the window shade 36 and results in the formation of a cleaner cut.
- the slicing action also prevents the cut edges of the head and bottom rails 38 , 40 from breaking or cracking.
- the window shade is preferably configured over the top surface 24 of the base 22 so that the cutting edge 90 simultaneously abuts against the bottom rail 40 , the head rail 38 and the window covering material 41 .
- the mandrel 58 supports the head rail 38 and functions as an inner die. Because the mandrel extends all the way to the second end 54 of the cutting surface 24 of the base 22 and terminates immediately before the first face 92 of the cutting blade 32 , an extremely clean cut can be formed at the end of the head rail 38 .
- the mandrel 58 also prevents the head rail 38 from rotating in the movement direction of the cutting blade 32 while it is being cut, thereby further contributing to the formation of a straight and clean cut.
- FIGS. 7A-7C show the cutting blade 32 described above as the blade slices through the window shade 36 .
- the window shade 36 and the base 22 are depicted as blocks for clarity of illustration.
- the cutting edge 90 engages the entire top of the window shade 36 .
- the cutting edge 90 simultaneously engages the base rail, the window covering material and the head rail.
- FIG. 7B the cutting edge moves vertically downward along the y-axis and to the side along the x-axis, i.e. diagonally through the window shade 36 .
- the cutting edge 90 continues to move diagonally through the window shade 36 until the blade 32 has sliced completely through the shade 36 , as shown in FIG. 7 C.
- the pocket 96 engages the shade 36 which further minimizes the forces the blade exerts upon the shade 36 .
- the cutting edge 90 of cutting blade 30 to remain substantially parallel to cutting surface 24 during the entire cutting operation.
- FIGS. 8A and 8B show side views of FIGS. 7A and 7C , respectively.
- the stop block 118 abuts against the end of the window shade 36 .
- the stop block 118 cams away from the cutting blade 36 which allows the end portion 128 of the window shade 36 , which is preferably unsupported, to freely pivot away from the cutting blade 32 .
- the forces exerted upon the window shade 36 by the cutting blade 32 are greatly reduced. This is of particular importance toward the end on the cutting stroke when the blade 32 has almost completely cut through the window shade 36 because at this point there exists an increased likelihood that the blade 36 will compress the head rail 38 and the bottom rail 40 which greatly increases the likelihood that those elements will crack.
- the blade 36 provides the window shade 36 with a clean, squared-off cut.
- the pocketed portion 96 of the blade 32 which is much thinner than the rest of the blade 36 , is the only portion of the blade which engages the window shade. This preferred design minimizes the thickness of the cutting blade 32 actually cutting through the window shade 36 , thereby preventing the head rail 38 and the bottom rail 40 from cracking, breaking or tearing as the window shade 36 is cut. Because the pocketed portion 96 is tapered, the end portion 128 of the window shade being cut pivots away from the blade 32 .
- the thickness of the blade 32 at that section is particularly thin so that the blade 32 does not crack or break the head rail 38 or the bottom rail 40 .
- the pocketed design results in only a thin portion of the blade 30 contacting the window shade 36 ; however, the massive portion of the blade 32 surrounding the pocket 96 stabilizes the pocketed portion 96 and prevents the blade 32 from bending during a cutting operation.
- the end portion 128 of the window shade 36 falls down and away from the cutting apparatus 20 and preferably through an opening in the supporting table.
- the operating handle 86 may then be rotated upward to its initial start position which will move the cutting blade 32 away from the backup 76 .
- the safety pin 88 will re-engage the pinion 82 to lock the pinion 82 in place and prevent further rotation of the pinion.
- the crank handle 74 is then preferably rotated in a counter-clockwise direction to release the clamping force on the window shade 36 so that the window shade 36 may be removed from the cutting apparatus 20 .
- the window shade 36 may then be removed by sliding the window shade 36 away from the first end 52 of the cutting surface 24 of the base 22 , so that the “C”-shaped opening 42 in the head rail 38 may be released from the mandrel 58 . If necessary, a second end of the window shade 36 may also be cut to a specified length using substantially the same techniques as described above. After the cutting operation is complete, the end caps 44 are preferably re-installed at the ends of the head rail 38 and the base rail 40 .
- the cutting assembly may follow an eccentric motion over a certain area of travel so as to multiply the force exerted by the cutting blade.
- the cutting assembly may include a laser for cutting the window shade with laser light energy. Accordingly, the foregoing description of the preferred embodiments should be taken by way of illustration rather than by way of limitation of the present invention.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Blinds (AREA)
- Knives (AREA)
Abstract
Description
Claims (17)
Priority Applications (1)
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US11/322,201 USRE40605E1 (en) | 1997-12-18 | 2005-12-29 | Cutting apparatus for window coverings and methods therefor |
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US6803997P | 1997-12-18 | 1997-12-18 | |
US09/054,845 US6435066B1 (en) | 1997-12-18 | 1998-04-03 | Cutting apparatus for window covering and methods therefor |
US09/245,596 US6681673B1 (en) | 1997-12-18 | 1999-02-05 | Cutting apparatus for window coverings and methods therefor |
US11/322,201 USRE40605E1 (en) | 1997-12-18 | 2005-12-29 | Cutting apparatus for window coverings and methods therefor |
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US09/245,596 Reissue US6681673B1 (en) | 1997-12-18 | 1999-02-05 | Cutting apparatus for window coverings and methods therefor |
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US09/244,742 Expired - Lifetime US6782788B1 (en) | 1997-12-18 | 1999-02-05 | Cutting blade for a cutting apparatus |
US09/245,596 Ceased US6681673B1 (en) | 1997-12-18 | 1999-02-05 | Cutting apparatus for window coverings and methods therefor |
US11/322,201 Expired - Lifetime USRE40605E1 (en) | 1997-12-18 | 2005-12-29 | Cutting apparatus for window coverings and methods therefor |
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US09/054,845 Expired - Lifetime US6435066B1 (en) | 1997-12-18 | 1998-04-03 | Cutting apparatus for window covering and methods therefor |
US09/244,742 Expired - Lifetime US6782788B1 (en) | 1997-12-18 | 1999-02-05 | Cutting blade for a cutting apparatus |
US09/245,596 Ceased US6681673B1 (en) | 1997-12-18 | 1999-02-05 | Cutting apparatus for window coverings and methods therefor |
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US8286538B2 (en) | 2001-07-23 | 2012-10-16 | Newell Window Furnishings, Inc. | Blind and shade cutting center for cutting two different window covering products |
US20080034933A1 (en) * | 2001-07-23 | 2008-02-14 | Newell Window Furnishing, Inc. | Blind and Shade Cutting Center for Cutting Two Different Window Covering Products |
US7987754B2 (en) | 2007-07-31 | 2011-08-02 | Newell Window Furnishings, Inc. | Window covering sizing method and apparatus |
US11872716B2 (en) | 2007-07-31 | 2024-01-16 | Hunter Douglas Industries Switzerland Gmbh | Window covering sizing method and apparatus |
US8256333B2 (en) | 2007-07-31 | 2012-09-04 | Newell Window Furnishings, Inc. | Window covering sizing method and apparatus |
US9440368B2 (en) | 2007-07-31 | 2016-09-13 | Newell Window Furnishings, Inc. | Window covering sizing method and apparatus |
US8322260B2 (en) | 2007-07-31 | 2012-12-04 | Newell Window Furnishings, Inc. | Window covering sizing method and apparatus |
US20110056345A1 (en) * | 2007-07-31 | 2011-03-10 | Newell Window Furnishings, Inc. | Window covering sizing method and apparatus |
US8631732B1 (en) | 2007-07-31 | 2014-01-21 | Newell Window Furnishings, Inc. | Window covering sizing method and apparatus |
US8839701B2 (en) | 2007-07-31 | 2014-09-23 | Newell Window Furnishings, Inc. | Window covering sizing method and apparatus |
US10786921B2 (en) | 2007-07-31 | 2020-09-29 | Hunter Douglas Industries Switzerland Gmbh | Window covering sizing method and apparatus |
US9427813B2 (en) | 2007-07-31 | 2016-08-30 | Newell Window Furnishing, Inc. | Window covering sizing method and apparatus |
US8479925B2 (en) | 2010-07-19 | 2013-07-09 | Newell Window Furnishings, Inc. | Display system |
US10450129B2 (en) | 2010-07-19 | 2019-10-22 | Levolor, Inc. | Blind packaging and methods of cutting window coverings |
US9266639B2 (en) | 2010-07-19 | 2016-02-23 | Newell Window Furnishings, Inc. | Blind packaging and methods of cutting window coverings |
US11312566B2 (en) | 2010-07-19 | 2022-04-26 | Hunter Douglas Industries Switzerland Gmbh | Blind packaging and methods of cutting window coverings |
US20120180613A1 (en) * | 2011-01-13 | 2012-07-19 | Lakes Precision, Inc. | Anti-Accumulation Wire Conductor Process Blade and Assembly |
Also Published As
Publication number | Publication date |
---|---|
CA2256158C (en) | 2004-04-06 |
US6435066B1 (en) | 2002-08-20 |
US6782788B1 (en) | 2004-08-31 |
US6681673B1 (en) | 2004-01-27 |
CA2256158A1 (en) | 1999-06-18 |
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