JPH09309161A - Assembled hot plate especially for corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a simple, efficient and low cost hot plate system for a double side corrugating machine by connecting leakproof contact parts together with a molten metal in order to form a flat heating face continuous from an external surface part. SOLUTION: A laser welding device is moved across the entire length of a separating bar 20 installed below a plate 17 or 18, directly above the plates 17, 18. The weld extends unto the separating bar 20 through the plates 17, 18 to form a joint 23 so that a continuous fluid does not leak. To prevent a molten matrix material from becoming oxidized, it is shielded by an inert gas together with the laser welding device. In addition, the welding process is performed with the matrix material itself without the need to use a welding line or a welding rod. Therefore, the outer surface of the plate 17 or 18 is comparatively smoother after the completion of the welding process. Consequently, a comparatively less volume of finishing work has only to be done for smoothing the outer surface 24 of the plate 17 or 18 which a web passes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot plate of assembled steel construction, which is particularly suitable for cardboard manufacturing, and more particularly to a hot plate for double-sided machines in which a liner web is attached to a single-sided corrugated web.

[0002]

2. Description of the Prior Art In a typical prior art duplexer, the liner web contacts the tip of the glued step of a single-sided corrugated web and the resulting freshly glued double-sided webs are placed in series. The starch-based glue solidifies as it passes through the surface of many steam chambers. With the top of the belt in contact with the moving web, such as by a series of ballast rollers, the double-sided web is above the steam chamber by a wide driven crimp belt that is in direct contact with the upper surface of the corrugated web. Can be moved. All of these are well known techniques. A beltless crimp ballast system was recently developed, but in this case a wide driven crimp belt is not used,
The double-sided web is pulled through the system by another web drive, such as a downstream vacuum belt.

One example is US Pat. No. 3,175,300.
Prior art steam chambers disclosed in
The pressure vessel is made of a heavy cast iron structure that is made to contain the high pressure steam that is delivered to the steam chamber. For example,
The walls of the cast iron vapor chamber typically have a temperature of, for example, 350 ° F.
(177 ° C), pressure is 160 psi (1103 kp)
It has a thickness of 1 inch or more so that it can safely contain the superheated steam supplied in a). The steam chamber is laterally long enough to support the full width of the moving web and normally has a width of about 18-24 inches in the direction of web travel. It has a flat top web support surface. Eighteen steam chambers are usually arranged in series in the double-sided machine at narrow intervals.

Since prior art steam chambers have a heavy cast iron structure, they suffer from many known structural problems. It takes a long time from the start-up to bring these heavy structures with the walls of the steam chamber to the required temperature.
Eventually, the temperature of the steam chamber will be close to the temperature of the steam delivered to it.

[0005]

However, when the work is started and the double-sided corrugated web begins to pass over the upper surface of the steam chamber,
The temperature drops rapidly and the maximum surface temperature is 280-290 °
It may fall to F (136-143 ° C). Since the working temperature is reduced as described above, significantly more steam chambers must be used in a given duplexer than the number of steam chambers required if more efficient heat transfer were to occur. It will not happen. Another problem associated with inefficient heat transfer through cast iron in heavy steam chambers is that the top surface of conventional steam chambers bends laterally during operation. As already mentioned, the temperature of the flat upper wall of the steam chamber is considerably lower than that of the bottom wall of the steam chamber, so that the upper surface of the steam chamber is vertically (above) Curved concavely (in the direction transverse to the direction in which the web is fed). As a result, the crimp belt and the lateral ballast rollers pushing the belt downward against the upper surface of the web are unable to apply a uniform load to the web. As a result, the adhesive does not cure uniformly, leaving poorly adhered areas and areas with no adhesion at all, resulting in crushing of the side edges of the web. Finally, due to the large mass of the cast iron steam chamber, high temperatures are maintained, cooling is done slowly, and in order to prevent the web from being overheated, the web is lifted or the steam chamber is heated. It often happens that complex systems have to be used to lower or lower.

US Pat. No. 5,183,525 acknowledges that the above operating problems occur in systems that use heavy cast iron vapor chambers. In the case of the above patent, instead of a steam chamber, a horizontal horizontal hole is drilled to form a meandering steam path through a steel plate, the hole being on its opposite side. Thick steel plates are used that connect to each other at the ends of the. The holes can be opened in such a way that the web of material between the walls of the holes and the upper surface of the steel plate is much thinner, in order to increase the efficiency of heat transfer. The above patent also discloses that the curvature, or strain, of the upper contact surface of the steel plate is minimized. However, the heating plate structure of the above patent is still fairly heavy and heavy, and the required drilling, i.e. forming the holes, is laborious and expensive.

US patent application Ser. No. 08 / 255,159, dated June 7, 1994, discloses a hot plate for supporting and heating a moving web of corrugated cardboard in a double sided machine. This hot plate comprises a web-supporting top plate made of metal such as copper having a high heat transfer efficiency (high heat conductivity) and the plate described above in a direction across the web being fed. Below the top plate and in contact with the underside of the top plate in a manner that allows it to transfer the heat needed for the work. A series of tubes,
Each along the edge of one side of the top plate,
A set of steam supply manifolds connecting the open ends of the tubes. The above device also prevents vertical movement of the lower support frame with fixing means and the side edges of the top plate, but is free to move horizontally in the horizontal direction when thermally expanded. Vertical crimping means.
While this hot plate structure is a significant improvement over heavy cast iron and assembled steel structures, it still suffers from heat distortion of the plate.

Therefore, there remains a need for a simple, efficient, low cost hot plate system for a double sided machine that effectively solves the problems associated with the prior art.

[0009]

SUMMARY OF THE INVENTION In the present invention, an assembly hot plate for use in supporting and heating a web of material that moves on a plate in contact with the plate, and Hot plates, particularly for use in a double-sided machine for making cardboard, are installed against adjacent members along joint contact portions to form internal heating fluid channels and flat outer surface portions, respectively. A series of elongated metal members, preferably of rectangular cross-section, made of steel and joined to form a continuous flat heating surface from the outer surface portion described above. It includes a fluid-tight molten metal joining the parts or a suitable joining connection, and a series of parallel heating fluid channels located below the heating surface.

The elongated metal members from which the hot plate is made can have various rectangular cross-sectional shapes, and in one embodiment, the metal members described above have substantially the same shape,
It has an upper rectangular plate with an area and thickness and a lower rectangular plate, each plate having a flat heating surface,
A plurality of separating bars are arranged in parallel between the plates at a distance. Each separating bar has a contact portion for each plate.

In another embodiment, the elongated metal member includes an upper rectangular plate and a lower rectangular plate similar to those of the previous embodiment, but each plate is heated. Including integral separating ribs formed in parallel and spaced apart on the side of the plate facing the surface, aligned with ribs on other plates to provide contact. It has each rib on one plate.

In another embodiment, the elongated metal member comprises a member having a T-shaped cross section, each member being located at the edge of the parallel facing face plate and in the center of the face plate. A unitary leg plate extending perpendicular to the face plate and a face plate having a leg plate edge parallel to the edge of the face plate. Each member having a T-shaped cross section is installed in an inverted manner with respect to an edge of a face plate from a member having a T-shaped cross section and a member that is alternately adjacent to each other. Leg play from the inverted member in the middle of the existing member
A part of the edge of the gutter touches the connection seam.

In yet another embodiment, similar to the embodiment just described, the elongated metal members consist of members having a C-shaped cross section, these members being provided with parallel face plate edges. It includes an integrated leg plate having a face plate and a lower face plate and upper and lower edges extending perpendicular to the face plate and interconnecting the face plates. One cross section is C
The edges of the face plates of the strip-shaped members and portions of the upper and lower edges of the leg plates of the adjacent members are joined to the connecting seam.

The above-described embodiments of the assembly hot plate are as follows.
It preferably includes a set of heated fluid distribution manifolds. Each manifold is attached to an edge on one side of the hot plate and connects the open ends of the fluid channels along the edge to which it is attached.

In the case of a particularly suitable hot plate assembly for supporting and heating a paper web, the assembly described above comprises upper and lower rectangular metal plates of approximately the same shape, area and thickness. In addition, each metal plate has a smooth outer surface. In use, a series of metal separator bars contacted with it during use to form a series of heated fluid channels extending transversely to the direction of movement of the web through the assembly. In the state, they are arranged in parallel at intervals. Means are also provided for forming a permanently fluid tight connecting seam along the contact interface between each separating rod and plate. The connection seams are welded or brazed or formed of a high strength, heat resistant epoxy resin adhesive.

The hot plate assembly also preferably includes a set of heated fluid distribution manifolds. Each of the above manifolds connects the open ends of the heated fluid channels along one side edge of the hot plate assembly. The lower support frame includes a bottom frame member that can be installed below the hot plate assembly in a vertically spaced and parallel manner. The fixing means is
The purpose of this is to quickly interconnect the hot plate assembly and the bottom frame member in the middle of the manifold.
Additional vertical crimping means prevent the lateral edges of the hot plate assembly from moving vertically, but the lateral edges of the manifold and support frame to prevent lateral lateral movement. Connect to each other.

In another embodiment, a basic hot plate structure made of seamless top and bottom plates is used to provide an outer convex heating surface and a plurality of parallel spaced apart. The plate is bent to form a concave facing surface that is separated by a separating bar having a. A portion of each of the above surfaces is in contact with each plate, and a pair of adjacent surfaces together with the plate pass through the plate to form a heated fluid channel.

In yet another embodiment, the connections between the metal members can be made with high strength epoxy resin adhesives that withstand high temperatures. High temperature resistant and high strength adhesive connections are particularly suitable for assembly of hot plates using rectangular plates, while in other embodiments elongated metal members are made of tubing. You can also In particular, tubes, which are generally square or rectangular in cross section, can also be glued side by side and covered with a surface layer of adhesive to form an active external web heating surface.

[0019]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, which is a schematic diagram of a conventional, conventional construction, double-sided machine 10 including a series of hot plates assembled in accordance with the present invention. Each hot plate 11 is assembled in the same state and performs a heating function in the same manner when manufacturing a double-sided corrugated web as in the prior art described above. Therefore, the hot plate 11 forms a flat and substantially continuous heating surface,
A double-sided corrugated web formed by joining a single-sided corrugated web 13 and a liner web 14 thereon is carried by a crimp belt 15, which is pressed against the web 12 by a series of ballast rollers 16. . As already briefly described, the crimp belt 15 and the ballast roller 16 can be replaced by another type of crimping device and a separate web drive.

2-5, each of the hot plates 11 of this preferred embodiment of the present invention includes upper and lower pre-plates that are spaced apart and interconnected by a series of separating bars 20. -Contains 17 and 18. Separation bars are formed on top of each other to form a series of channels 21 for guiding heating fluid through the hot plate assembly in a direction transverse to, or intersecting, the direction of movement of the double-sided corrugated web 12 through the double-sided machine 10. And the lower plates 17 and 18 are arranged in parallel with a space therebetween.

It has already been mentioned that the hot plate 11 can be manufactured using steel plates 17 and 18 which are relatively thin, for example about 1/8 inch (about 3 mm) thick. The plate is preferably made of stainless steel so that it does not corrode. But,
Mild steel can be used as well. In that case, the inner surface is preferably coated or plated to prevent corrosion. Space bar 20 is preferably rectangular in cross-section, and is preferably square about 1/4 inch. The mating contact surface between each separating rod 20 and the opposing inner surface of plates 17 and 18 acts as an interface connecting the assemblies. By making a continuous, permanent connection along all contact surfaces 22, a fluid tight seam can be formed, thereby forming a series of independent channels 21 through which A heating fluid, preferably steam, is provided to heat the plate. Since the hot plate 11 is a thin and lightweight structure, not only can the assembly be made lightweight and the material cost can be reduced, but the hot plate can be much more sensitive to heat and can be heated rapidly. And / or can be cooled. As a result, the moving web 12
Heat can be applied to (and can be drawn from) much more rapidly, so that the temperature of the web can be controlled much more accurately.

Laser welding is the presently preferred manufacturing method for hot plate assembly. The laser welding device moves just above one of the plates 17 or 18 over the entire length of the separating rod 20 installed therebelow. The weld extends through the plate to the separating rod and forms a continuous fluid tight seam 23. In order to prevent the molten base material from being oxidized, shielding with an inert gas is performed together with the laser welding device. Also, the outer surface of the plate 17 or 18 is relatively smooth after the welding operation is completed, since welding can be performed by the base metal itself without the use of welding lines or welding rods. As a result, relatively few polishing or finishing operations are required to smooth the outer surface 24 over which the web passes.

Alternatively, the hot plate can be manufactured by brazing. For example, the contact surface 22
It can be fitted with an assembly fixed together with a silver solder / flux composition and heated in an oven to the brazing temperature.

As is typically the case with prior art steam chambers, the hot plate 11 of the present invention is relatively long across the machine to accommodate the maximum width of the web being processed. It becomes longer and the length of the machine in the machine direction, ie the direction in which the web travels over a series of parallel hot plates, is relatively short. Therefore, the longer length of the plate across the machine may be 96 inches. On the other hand, the shorter length of the machine longitudinal plate is typically 18-24 inches.

Manifold 25 surrounds the ends of channel 21 and provides a common header for supplying steam to all of the ends of the channel on one plate and on opposite sides of the plate. It is installed to extend along each edge on opposite sides of the hot plate 11 to provide a common condensed water recovery header for the channel openings on the ends. Therefore, each manifold has a length approximately equal to the length of the shorter lateral plate of the machine. Each manifold 25 is preferably manufactured from a substantially identical manifold portion 26 having a generally L-shaped cross section. Each manifold, when connected together and to the top plate,
A vertical through hole portion 27 having a generally rectangular cross section is formed. The outer edge of the manifold portion 26 is secured by a series of machine screws 28 to the joint between the mating surface of the manifold portion, which is sealed by a suitable sealant 30. The inner edge of the manifold is connected through the side edge of the hot plate 11,
Secured by a series of machine screws 31, each of which extends through a matching aperture in the upper and lower plates 17, 18 and an intermediate separating rod 20. All these parts are shown most clearly in FIG. The interface between the manifold portion and the upper and lower plates is sealed by a suitable gasket or seal 32 which also extends the length of the manifold. The manifold may be welded to the plate instead of being fixed to the plate with bolts. The use of continuous weld seams eliminates the need for a sealing gasket. Manifold through holes 27 connect the open ends of all channels 21 on one edge of the hot plate. The steam supply or condensate discharge hole 33 is provided at the center of the lower surface of each manifold 25. For proper placement and for reasons explained below, steam / condensate holes 33 are provided in each upper and lower manifold portion 26, each hole having an adapter union 35 thread. Sleeve 34, or if not used, is tapped to thread a threaded plug. The inside of the lower end of the union 35 has threads for receiving the threaded end of the steam supply line 29. Similar holes 33 in the manifold on opposite edges of the hot plate
It is connected to the condensate return line 49. Manifold 2
The steam supplied to No. 5 is supplied to each channel 21 through the through hole 27 and sent to the condensate recovery manifold on the opposite side surface of the plate. The end of the through hole 27 is sealed by a suitable plug 37.

The entire hot plate assembly, including upper and lower plates 17, 18, separator rod 20 and manifold 25, is mounted on lower support frame 38. The support frame, as described in the prior art, is assembled so that the hot plate is free to thermally expand laterally, but the side edges do not bend vertically upwards, and Connected.
The lower surface of the lower plate 18 is preferably insulated from the lower support frame 38 by a heat insulating layer 39. The thermal insulation layer 39 is mounted on a flat metal bottom plate 40 which also forms the upper surface of the support frame 38. The bottom plate 40 can be made of, for example, a 1/4 inch (6 mm) rectangular steel plate having approximately the same area as the bottom surface of the hot plate. The bottom plate 40 is a pair of inverted L
It is mounted on a box-shaped frame made of a set of L-shaped side rectangular members 41 interconnected with a rectangular cross member 42. The square member 41 and the cross member 42 can be suitably connected by welding or any other convenient connection mechanism, and the bottom plate 40 is likewise a member 4.
It can be fixed to the upper edge or face of 1 and 42.

The assembly hot plate 11 is secured to the bottom plate 40 of the lower support frame 38 intermediate between the manifolds by a set of anchor brackets 43 located at the front and back edges of the hot plate. Has been done. Each anchor bracket 43 is secured to the top surface of the bottom plate 40 at a lower edge thereof by a set of machine screws 44. The top edge of the anchor bracket likewise throughout the assembly, including the upper plate 17, the separating rod 20 and the lower plate 18, for mounting in the threaded holes in the anchor bracket 43. It is secured to the lower plate 18 of the hot plate assembly by a set of extending machine screws 45. Although the hot plate 11 of the present invention has a uniform cross section, the tendency of the outer edge to bend upward due to the different thermal expansions that normally occurs in prior art steam chambers is minimized, but It is preferable to install a mechanism for preventing the above-mentioned bending. Therefore, both edges of the hot plate are connected to the L by a series of tie bolts 47 threaded into the underside of the manifold 25.
The side surface member 41 is fixed to the horizontal flange 46.
As can be seen in FIG. 2, the horizontal flange 46 prevents the edges of the hot plate from bending upward,
A bolt hole 48 widened in the lateral direction of the machine to accommodate the thermal lateral extension of the hot plate 11.
have.

Since the same upper and lower plates 17 and 18 are used and the hot plate 11 has a symmetrical structure, if the original upper plate is worn during use, it should be turned upside down. Can be used. The use of various threaded connections using tie bolts 47 and machine screws 45 allows the hot plate to be easily and quickly removed from the lower support frame 38, exposing the upper surface of the new plate. Therefore, the plate can be turned inside out. Preferably, with the manifold 25 still in place, the threaded adapter union 35 in the lower manifold section is replaced with the corresponding threaded plug 36 in the upper manifold section 26. It is preferable. In this case, a threaded hole for the tie bolt 47 must also be provided in the upper manifold portion for inversion and reattachment, as also shown. Alternatively, the two manifolds 25 can be removed from each side edge, the central crimp machine screw 44 removed, the plate turned inside out and reattached to the manifold and anchor bracket 43 as previously described. By doing so, the hot plate 11 can be turned inside out.

FIG. 6 is a hot plate assembled according to another embodiment of the present invention. For this construction, a set of identical upper and lower plates 51 and 52 having the same shape and area, and a nominal thickness of about 1/8 inch (3 mm), are provided at plates 17 and 18. As previously described, it is formed with integral separating ribs 53 spaced in parallel on one side of the plate. Separation ribs 53 can be formed by extrusion, machining, casting operations or any other convenient method. The ribs described above have the same function as the separating rod 20 already described, but have the advantage that only one mating contact interface 54 has to be connected by welding, brazing or a similar process. ing. For example, the welding interface 54 can be formed by a resistance welding process, in which the electrode wheels carrying high currents are separated while being pushed in the direction of each other under a high clamping load. Along the passage of the rib 53, move together on opposite sides. Alternatively, the resulting hot plate 50 can be attached to the manifold 25 and the support frame 38 in the same manner as previously described.

Referring to FIGS. 7 and 8, these figures also use elongated metal components having a square cross section, but with a non-rectangular cross section, instead of an integral top and bottom plate. 2A and 2B show two alternative embodiments of the assembly hot plate without the use of a toe component. However, when assembled as described below, the resulting hotplate is functionally the same as the previously described embodiment, also using the same manifold structure, connecting device and support frame as above. There is. Similarly, the plates of the embodiments of FIGS. 7 and 8 can be completely flipped in the same manner as previously described.

Referring to FIG. 7, the hot plates 55 are identical in the cross machine direction transverse to the direction of web travel and are separated by a series of individual vapor channels 58 passing through the plate. It is formed from a series of elongated C-shaped cross-section members welded together to form upper and lower plate surfaces 56 and 57. Each member 56 having a C-shaped cross section comprises an upper face plate 61 and a lower face plate 62 interconnected by an integral leg plate 63. The member 56 joins the upper and lower edges of the leg plate 63 to provide a mating contact interface 65 for the appropriate connecting seams, and upper and lower plates 61 and 62.
Is installed with the free edge 64 of the. As already mentioned, the connection can be made by welding, brazing or any other suitable molten metal connection process. Using conventional welding techniques, the weld material will remain on both plate surfaces 57 and 58, which must be ground flush before using the hot plate. When the hot plate 55 is assembled by welding, as shown in the figure, in order to seal the member 56 having a C-shaped cross section at the edge of one longitudinal plate,
It may be necessary to add one end plate 66.

Referring to FIG. 8, another embodiment of this figure is a hot plate made up of a series of elongate T-shaped members 68 which are inverted and welded in series adjacent to each other. It consists of 67. More specifically, each member 68 having a T-shaped cross section has a face plate 70 having parallel facing face plate edges 71 and a face plate 70 installed at the center of the face plate and extending perpendicular to the face plate. Includes an integral leg plate 72 having a free leg plate edge 73 parallel to the edge 71. A member with a T-shaped cross section is
Edge 71 of the face plate of every other member and edge 73 of the leg plate from the inversion member in the middle of every other adjacent member are welded seams or other connection seams 75. To provide a contact interface 74 to the adjacent member 68. As with the hot plate embodiment of FIG. 6, it may be necessary to polish the material forming surface from the weld seam 75 to a smooth surface 76 for engaging the web.

A modified hot plate 77 shown in FIG.
Uses the same basic components as the hot plate of FIG. However, the clear difference between the two is that the hot plate 77 has a convex upper plate 78 and a concave lower plate 80. These plates are separated from each other and connected to each other by a series of spaced separating rods 81. The interface between the separating rod and the plate can be connected by welding, brazing or other similar methods already described.

The curved hot plate 77 cannot be turned inside out as in the previously described embodiments, but has many potential advantages when used, for example, on the wet end of a corrugator instead of a web preheater. have. Prior art preheaters have heavy wall construction, usually large diameter drums that must meet pressure vessel specifications. The curved hot plate 77 has a relatively thin wall structure and the steam channel 82 has a small cross section, so that this structure complies with pressure vessel standards (like all hot plate structures described herein). You don't have to.

The curved hot plate 77 is preferably manufactured using curved plates 78 and 80 from the beginning, for example using the laser welding process described in the embodiment of FIG. Separation rod 8 with a square cross section
Welding to 1 is preferred.

In a further embodiment of the invention, particularly adapted to the structure shown in FIGS. 3-5, the material of the upper and lower plates 17 and 18 and / or the separating rod 20 is steel. Other suitable materials can be selected at this time. In addition, other suitable adhesives can be used in place of welded or brazed seams.

For example, the plate and / or the separating rod can be made of aluminum, and when the plates 17 and 18 are made of aluminum, the outer surface of the plate and the separating rod is less worn. It can be covered with a suitable hard surface for working. Separation bars (or
Epoxy resin adhesives that can be used to bond the contact interface 54) of the embodiment of FIG. 6 to the plate and can withstand high temperatures can also be used. For example, the commercially available epoxy resin adhesive is 5
Can withstand high temperatures of 00 ° F (260 ° C), 1
It has a tensile strength of 10,000 psi. This epoxy resin adhesive also has a very high resistance to very corrosive liquids.

10 and 11 show another embodiment of the hot plate of the present invention, which can be assembled using an epoxy resin adhesive having high strength and capable of withstanding high temperatures. The hot plate 83 has a series of tubes 84 of square cross section that are joined by an epoxy resin adhesive joint 86 along adjacent sidewalls 85.
Made from. The epoxy resin adhesive bonds the joint 86 to provide a continuous top and / or bottom surface layer 87 that is appropriately smoothed to form the active web contacting heat conducting surface. It can be extended beyond. Alternatively, the adhesive joint 86
Between the adjacent tubes 84 and the upper and / or lower sidewalls 88 of the finished tubes to form a heat transfer surface (schematically illustrated and described in FIGS. 7 and 8). Can be provided. Epoxy resin adhesives of the type outlined herein may also include suitable metal fillers to enhance heat transfer. As shown in FIG. 10, a split manifold 89 (similar to that shown in FIG. 4) is attached to the tube 8 bonded with an adhesive.
4 can be enclosed and attached to the above tube with the same epoxy resin adhesive.

[Brief description of drawings]

FIG. 1 is a schematic side view of an entire duplexer using the hot plate assembly of the present invention.

FIG. 2 is a partial cross-sectional end view of the preferred embodiment of the hot plate assembly of the present invention.

3 is an enlarged cross-sectional view of the hot plate taken along line 3-3 of FIG.

FIG. 4 is an enlarged view taken along line 4-4 of FIG.

FIG. 5 is a sectional view taken along the line 5-5 in FIG. 4;

6-8 are cross-sectional views similar to FIG. 3 showing another three embodiments of the present invention.

9 is a cross-sectional view of a modified version of the embodiment of FIG.

FIG. 10 is a partial sectional view similar to FIG. 4, showing another embodiment of the present invention.

11 is a partial cross-sectional view taken along line 11-11 of FIG.

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[Procedure amendment]

[Submission date] March 5, 1997

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

[Fig. 2]

[Figure 3]

FIG. 4

[Figure 5]

FIG. 10

FIG. 11

FIG. 6

FIG. 7

[Figure 8]

[Figure 9]

 ─────────────────────────────────────────────────── ───Continued from the front page (72) Inventor Larry M. Cruz Narich 54552 Parkforth, Sugarbush Road N 15620 (72) Inventor Jensen Karlsson Wisconsin, USA State 54555 Golf Course, Golf Course N. 8994 (72) Inventor Robert Elternquist, USA Wisconsin 53597 Noh, Cambridge Court 1002 (72) Invention Kenneth Day Danielson Wisconsin, USA 54556 Pleintis, Ash Street 1030

Claims (15)

[Claims] 1. An assembled hot plate for use in supporting and heating a web moving in contact therewith, each for forming an interior heating fluid channel and a flat exterior surface portion. , A series of elongated metal members of rectangular cross section, installed against adjacent members along the joint contact portion, and a series of parallel, installed below the outer surface and the heating surface. A hot plate of molten metal that does not leak the fluid joining joining contacts to form a continuous, flat heating surface from the heating fluid channel. 2. An elongated metal member comprising upper and lower rectangular plates of approximately the same shape, area and thickness, each providing a flat heating surface, and each of said plates. A hot plate according to claim 1, comprising separating bars arranged in parallel at intervals between the plates for supplying the contact portions. 3. The upper and lower rectangular plates of approximately the same shape, area and thickness, each providing a flat heating surface, and the elongated metal members each forming a contact portion. Claims: Integral separating ribs formed parallel and spaced on the side of each plate facing the heating surface, the ribs being aligned with the ribs on the other plate. Item 1. The hot plate according to item 1. 4. The elongated metal member has a face plate each having parallel facing face plate edges, and the elongated metal member is located at the center of the face plate and extends perpendicular to the face plate, and is parallel to the edge of the face plate. A member having a T-shaped cross-section having an edge portion of a different leg plate, each member having the T-shaped cross-section is inverted with respect to an adjacent member, and the elongated metal member is Claims: 1. Edges of face plates from every other adjacent member that provide contact to one connecting seam, and edges of leg plates from an inverted member intermediate every other adjacent member. Item 1. The hot plate according to item 1. 5. The upper and lower face plates each having parallel face plate edges, and the upper and lower edges extending perpendicular to the face plate and interconnecting the face plates, wherein the elongated metal members are parallel to each other. A member having a C-shaped cross-section including an integral leg plate having a cross section, and one cross-section for supplying a joining portion to a connection seam is C-shaped.
2. The hot plate according to claim 1, wherein the hot plate has an edge portion of a face plate of the strip-shaped member and an edge portion of a lower portion of the leg plate of the adjacent member. 6. Each connecting an open end of a fluid channel along one end of a hot plate,
The hot plate of claim 1, comprising a set of heated fluid distribution manifolds. 7. A hot plate assembly for supporting and heating a paper web moving in contact over a plate surface, each having substantially the same shape, area and area with a smooth outer surface. Above and below the rectangular metal plate of thickness and in order to form a series of heated fluid channels extending through the hotplate in a direction transverse to the direction with which the web travels during use. Along with a series of metal separators placed in parallel and spaced apart in contact with the plate, and permanently along the contact interface between each separator and the plate. A hot plate assembly comprising means for forming a fluid tight contact seam. 8. The hot plate assembly of claim 7, wherein the seam is a welded seam, a brazed seam, or an adhesive seam. 9. A set of heating fluid distribution manifolds, each connecting an open end of a heating fluid channel along one side edge of the hot plate assembly and spaced therefrom. Vertically parallel, a lower support frame that includes a bottom frame member that can be located under the hot plate, and a securing means that securely interconnects the hot plate assembly and the bottom frame in the middle between the manifolds, and the hot plate assembly. Vertical side crimping means interconnecting the manifold and the side edges of the support frame to prevent vertical movement of the side edges of the The hot plate assembly according to claim 7. 10. An assembly hot plate for use in supporting and heating a web moving in contact therewith, each of which comprises a top plate having a convex top web contact surface. -A set of approximately the same shape, which is formed in a similar arcuate shape in the direction in which the web moves to provide the lower plate forming the outer surface of the concave and the lower outer plate. Of rectangular plates, each of which provides a mating contact surface, together with the inner surface of each of the plates described above, having a rectangular overall cross-section that is spaced between the plates. An assembly hot plate consisting of a separating rod and a molten metal connection seam that does not leak the fluid joining the joining contacts. 11. Secure the hot plate assembly and frame member midway between a lower support frame including a frame member positionable beneath the hot plate and vertically parallel to and spaced therefrom, and the manifold. The side edges of the manifold and support frame prevent the vertical movement of the interconnecting fastening means and the side edges of the hot plate assembly, but do not impede horizontal lateral movement. 7. The hot plate assembly of claim 6 comprising vertical crimping means for interconnecting the. 12. The lower support frame includes a bottom plate disposed below the hot plate, parallel to and perpendicular to the bottom support frame, with a heat insulating layer between the bottom plate and the hot plate. The apparatus of claim 11, further comprising: 13. An assembled hot plate for use in supporting and heating a web moving in contact therewith, each for forming an interior heating fluid channel and a flat exterior surface portion. A series of elongated metal members having a square cross section, which are installed against adjacent members along the joint contact portion, and a series of which are installed below the outer surface portion and the heating surface. An assembly hot plate comprising connecting means for joining the mating contact portions to form a continuous flat heating surface from the parallel heating fluid channels of the. 14. The hot plate according to claim 13, wherein the connecting means comprises an epoxy resin adhesive joint portion. 15. The hot plate according to claim 13, wherein the elongated metal member is a tube having a square cross section.