US2518949A - Seam for stitched articles - Google Patents

Description

A g. ,1 5o I D. G. SMITH 7 2 518, 49

SEAM FOR STITCHED ARTICLES 7 INVENTOR- @arwin G. Smith ATTORNEY "This invention relates yarticles, andtmore particularly to animproved -oyeredge seam which is adapted forusein the edge-embracing orsoveredge thread l2.

Patented Aug. 15, 1950- *SEAM FOR 'STI'T CHED ARTICLES Darwin G. Smith, Bridgeport, Conn., assignor to The Singer .Manufacturing Company, Eliza- "beth, N. J a corporation of New Jersey Application November 14, 1947, :Serial No. 786,013

to seams for stitched productionof eyelets and :buttonholes.

.The primary object of the present invention is to. provide lan overedge seam which is superior in both quality and durability.

Another objectoftheinvention is to provide .an improved overedge seam having the characteristic of presenting an embossed or padded effect on one face of the 'body material in which thesearnis formed and particularly desirable in connection with eyelets; and buttonholes.

A further object of :thepresent invention is to provide, a machine-made eyelet or buttonhole leaving an appearance closely approximating a handstitched eyelet orbuttonhole.

, "The above andother more sp cific objects will .iappearupon reading the following specification and claims and upon considering in connection therewith the attached drawings to which they relate. q

Referring now to the drawings: 7 Fig. 1 is a plan view of one face of a body ma- :terial providedwith-an-eyelet made in accordance with-the presentinvention. 1

filigwzis a. plan view ofithe other face of the -bojdy material and eyelet shown in Fig. l. i

q Fig. .3 is an enlarged development of the stitching forming the :eyelet.

Fig. 4 represents a sectional view taken substantially along the line 4-4, Fig. 2. Referring more in detail to .the drawings, the

eyelet isshown as for-med in apiece of body materialior work .W from which has been cut a center eye H3. The stitching is formed by the concatenation of a depthestitch thread I I and an The depth-stitches of -the thread ll penetrate the material W :back from the edge thereof and extend circumferential-1y of theeyelet, while the overedge thread I2 embraces the edge of the materi-a'lin the form of thread loops extending radially of the eyelet and anchored in place by the depth-stitch thread' l L V The eyelet shown inthe drawings can be produced by a sewing machine made in accordance with that forming the subject of the pending patent application Serial No; 786,017 filed on Nov; 114, 1947 now Patent No. 2,515,740, dated July 18,1950 by Darwin G. Smith and Harold 'C. Faulkner. As illustrated and described in that patent application, the stitch-forming mechanism includes a depth-stitch thread-handling upper straight needle N, an overedge threadhandling lower curved vthread. As the depth-stitch thread-loop l3is needle .0 and a looper L. In operation, the straight needle N penetrates the material back from the edge thereof and presents a thread-loop to the looper L- which, after seizingthe thread-loop, expands it for en- -.trance by the lower curved needle C. After entering the expanded thread-loop, the curved needle C carries its thread 12 about the edge of the material to the opposite face thereof and presents aloop of overedge thread for entrance by the straight needle N on its next downstroke.

It will be understood from Fig. 3 that in forming the improved seam, a loop l3 of the depthstitch thread II is carried through the material by the straight needle N and that the thread-loop 13 thus formed is then seized and expanded by the looper L. The looper, during its loop-ex- .panding stroke, moves the thread-loop IS in a direction beneath the limb M, of overedge thread extending from the last stitch to the eye in the ,curved needle C. The curved needle C then'en- 'ters the expanded thread-loop I3, thus passing the thread-p [5 of the overedge thread I2 through the expanded thread-loop 13. The thread-loopl5 is then carried about the edge of the material, which defines the cut eye it, and across the upper face of the material to a posi- 'tion .directly beneath the straight needle N so that the loop of overedge thread can be entered and thereby enchained with the depth-stitch tightened by the usual sewing machine thread take-up devices, thesaid thread-loop is twisted, as indicated at iii in Fig. 3, the twist in the finished eyelet preferably being drawn into and hidden in the body material between the opposite faces thereof.

It will be observed, particularly in Figs. 3 and 4, that on one face of the material there are long loops 1.! of overedge thread, which loops extend substantially radially from the edge of the material back to the point of penetration of the depthstitch thread H, while on the opposite face of the material the overedge thread is formed into short loops [8 which also extend in adirection substantially radially back from the edge of the --.material. with the loops I3 of depth-stitch thread, which These short loops t8 are enchained loops I 3 continue from the ends of loops l8 across 'theface of the material to the .point'at which the depth-stitchthr-ead penetrates the material W.

As will be seen in Fig. 4, the overedge threadloops it pass through the depth-stitch threadloops l3 in a direction away from the adjacent face IQ of the body material, while on the opposite face 28 of the body material the depthstitch'thread-locps 13 pass through the overedge thread-loops ll in a direction toward said face 28 of the body material. The enchaining of the thread-loops l8 and I3 between the edge of the material and the point of penetration of the depth-stitches, coupled with the fact that the overedge thread-loops 58 pass through the depthstitch thread-loops 13 in a direction away from the face I9 of the body material, raises the thread-loops l8 and 13 relative to the material face 19, thereby producing in the completed eyelet a padded or embossed appearance on one face of the body material which simulates very closely the appearance of a hand sewn eyelet.

The concatenation of the edge-embracing thread l2 and the depth-stitch thread II is such that the stitches comprising the overseam can be readily set without requiring excessive tensioning of the two threads H and 12. Thus, the threads in the completed seam are not excessively strained and eyelets formed with the present seam are uniform in size and durable. In addition, the eyelet is neat in appearance owing to the absence of a drawn or puckered body material adjacent the eyelet. Moreover, the ease with which the stitches comprising the present seam can be set permit the production of round eyelets free of distortion in flimsy body material.

'Having thus set forth the nature of the invention, what I claim herein is:

1. An overseam for an edge of a body material, comprising depth-stitch thread-loops penetrating the body material back from the edge thereof, and edge-embracing thread-loop concatenated with said depth-stitch thread-loops upon opposite faces of the body material, said edge-embracing thread-loops on one face of said material passing through said depth-stitch thread-loops in a direc tion away from said face of the body material;

2. An overseam for an edge of a body material,

comprising depth-stitch thread-loops penetrating the body material back from the edge thereof, and edge-embracing thread loops concatenated with said depth-stitch thread-loops upon opposite faces of the body material, said edge-embracing thread-loops on one face of said material passing through said depth-stitch thread-loops in a direction away from said face of the body material, and said depth-stitch thread-loops on the other face of said body material passing through said edge-embracing thread-locps in a direction toward said other face of said body material, said depth-stitch thread-loops being twisted between the points of concatenation with said edge-embracing thread-loops at the opposite faces of the body material.

3. An overseam for an edge of a body material,

"comprising depth-stitch thread-loops penetrating the body material back from the edge thereof, and edge-embracing thread-loops concatenated with said depth-stitch thread-loops upon opposite faces of the body material, said edge-embracing thread-loops on one face of said material passing through said depth-stitch thread-loops in a direction away from said face of the body material and at a point intermediate the edge of the body comprising depth-stitch thread-loops penetrating the body material back from the edge thereof, and edge-embracing thread-loops concatenated with said depth-stitch thread-loops upon opposite faces of the body material, said edge- .embracing thread-loops on one face of said material passing through said depth-stitch threadloops in a direction away from said face of the body material and at a point intermediate the edge of the body material and the penetration of the body material by said depth-stitch threadloops, and said depth-stitch thread-loops on the other face of said body material passing through said edge-embracing thread-loops in a direction toward said other face of said body material, said edge-embracing thread-loops ons'aid other face of the body material extending from the edge of the body material back to the point of penetration of said depth-stitch thread-loops.

5. An overseam for a body material having an edge defining an opening, comprising depthstitches progressively formed in the body material concentrically with and in spaced relation to said edge, said depth-stitches including bodymaterial penetrating loops of thread secured by edge-embracing loops of thread passing through said opening and extending radially from said edge upon opposite faces of said body-material, said edge-embracing thread-loops on one face of said body material passing through said depthstitch thread-loops in a direction away from said face of the body material, and said depth-stitch thread-loops on the other face of said body material passing through said edge-embracing threadloops in a direction toward said other face of said body material. 7

6. An overseam for a body material having an edge defining a rounded opening, comprising depth-stitches progressively formed in the body material concentrically with and in spaced relation to said edge, said depth-stitches including loops of thread penetrating the body material and on at least one face thereof extending radially toward said edge, and edge-embracing loops of thread passing through said rounded opening and extending radially from said edge upon op- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS I Name Date Allen Nov. 30, 1915 Number

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