US2364100A

US2364100A - Slider for slide fasteners and method for making the same

Info

Publication number: US2364100A
Application number: US356417A
Authority: US
Inventors: Savitzky Abraham
Original assignee: MARVEL SLIDE FASTENER CORP
Current assignee: MARVEL SLIDE FASTENER CORP
Priority date: 1940-09-12
Filing date: 1940-09-12
Publication date: 1944-12-05
Anticipated expiration: 1961-12-05

Description

.De. s, 1944. AWTZRY 2,364,100

SLIDER FOR SLIDE FASTENERS AND METHOD FQR MAKING THE SAME Filed Sept. 12, 1940 2 Sheets-Sheet 1 2O l F I {HIIHHIIHII-I/ vunuwinl VH2 26 I 26 20 I '38 A0 20 A. SAVITZKY Dec. 5, 1944.

SLIDER FOR SLIDE FASTENERS AND METHOD FOR MAKING THE SAME 2 Shets-Sheet 2 Filed Sept. 12, 1940 .0 I i'. f5: 1 O

INVENTOR Aryan/44M Sill/172A r 2 AT i RNEY ing use.

Patented. Dec. 5, 1944 UNITED. STATES PATENT OFFI SLIDER FOR sum: FASTENERS AND METHOD FOR MAKING THE SAME Abraham Savitzky, Bronx, N. Y.. assignor to Marvel Slide Fastener Corporation, New Yor N. Y., a corporation of New York 1 Application September 12, 1940, Serial No. 356,417

27 Claims. This invention relates to sliders for Principally, the invention is directed to the production of a slider which, although fabricated from sheet metal, is characterized by a high resistance to undesirable deformation during both manufacture and use. 7

Qne aspect of my invention resides in the novel form imparted to the slider neck. In sliders heretofore made it hasbeen necessary to resort to many expedients to secure a rigid slider neck which would prevent the front and back plates or the slider from spreading'or compressing dur- Thus in sheet metal sliders, rivets, yoke's, weldingand the like devices havebeen employed for securing the necessary strength of slider neck. But these devices render the slider bulky inwappearance, and unduly increase the;

Sliderswhich have been cost of manufacture. manufactured by coining have employed special dies to create anextra' thickness of metal at the neck, but this has entailed additional manufacturing expense, coined sliders being more expensive to manufacture than sheet metal sliders.

cal to produce and pleasing in appearance.

Another object of my invention is concerned with the ball from which the slider finger piece depends. Heretofore this ball has been formed by a coining or upsetting operation,- by employing additional parts which were riveted or welded to the slider body, or by striking upwards a portion of a wing to form an'embryonic bail member. This latter method of providing a ball, although economical, considerably weakens the wing on which it is formed and-results in a; spreading of the slider flanges associated with slide fasteners and to a method for making the same.

joint between the slider wings the resistance to spread-' the cup. In this manner I produce a strong, imperforate wing with a bail integrally formed thereon, at a low cost of manufacture.

Other objects ofthis invention will in'part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements,

and. arrangement of parts which will be exemplifled in the construction hereinafter described, and of which the scope ofapplication will be indicated in the claims.

In the accompanying drawings, in which is shown one of the various possible embodiments of this invention,

Fig. 1 is a sectional view through :a pair of cooperating die members showing the cupping operation being performed on a slider strip during the formation of a bail;

Fig. 2 is a sectional view taken substantially along the plane represented by the line 2-2 in Fig. l;

Fig. 3 is a sectional view through a pair of cooperating die members showing the process of collapsing certain portions of the side wall of the cup to complete the bail;

Fig. 4 is an elevational view of a strip my novel bail members formed therein;

Fig. 5 is a top plan view thereof;

Fig. 6 is a sectional view taken substantially along the plane represented by the line 6-4 in Fig. 5;

Fig. 7 is a plan view of a slider blank after havin 1 the bail member has been-formed therein;

ation of said dies;

ship; and

the said wing, throwing them out of alignment with the corresponding slider flanges associated with the unmutilated wing. In accordance with my invention, the bail is formed by cupping the material of one of the wings and then collapsing Fig. 8 is a sectional view cooperating die members showing an early step during the process of forming my novel slider neck;

Fig. 9 is a similar view at a later stage of oper- Fig. 10 is a sectional view taken substantially along the plane represented by the line IU-lll in Fig. 9;

- Figs. 11 and 12 are mid-sectional views in elevation and plan of a slider ejected from the dies shown in Fig. 9 after the wings thereof have been brought into parallel superposed relation- Figs. 13, 14, 15 and 16 are front, side, 'rear and top views respectively of a finished slider embodying mylnvention.

Referring now to the drawings, and more particularly to Figs, 1 through 7, I have shown the bail-forming slider.

A strip 20 of sheet metal is first passed through through a pair of steps in the production of my novel a pair of cooperating die members comprising a therein which cooperates with a plunger 26 to form a raised cup 28 on the lower surface of the strip 28. -I'. prefer to form said cup 28 in two pressing operations, during the first of which the cup is drawn slightly larger than the ultimate size required, and in the secondof which the cup is die'block 22 having a cavity'24 suitably formed brought down to the desired dimensions shown in Figs. 1 and 2. However, said cup may be formed in any number of steps desired.

After the cupping'operation, the strip is advanced to a pair of cooperating

die members

88 and 32 having a pair of aligned

fingers

84 and 36 which are adapted to press into the opposite side walls 38 and 48 (see Fig.2) of the cup 28 to cola lapse the same inwardly into the shape shown in Fig. 3. It will be seen from Fig.- 3 that the upper portions 38 and 48 of the said walls of the" cup are shifted into the plane of the strip 28 so as to form a continuous web; that the lower portions 42 and '44 of the side walls are forced into abutment with the bottom of the cup to provide a reinforcement for the upper ridge 46 on the bail member 41; and that the central portions 48 and 68 of the side walls are firmly pressed the bail is formed) will assume the configuration indicated in Figs. 3, '5 and 6, comprising to outwardappearance a pair of juxtaposed elongated rectangular surfaces having raised central portions.

Subsequent to the formation of the bail members, the strip is stamped by any conventional means to form slider blanks such as shown in Fig. "I. The slider blanks may then be processed either individually or in the strip, in any manner well known to the art, to provide the usual flanges 64 and to shape the slider blanks into a V form (shown in Fig. 8). It should be noted that as both the slider wings are of substantially the same imperforate cross section, they will offer the same resistance to bending, so that the flanges 64 on both wings will be similarly disposed.

After the slider has been'fashioned tothe V'- shape, it is processed in the series of operations indicated in Figs. 8 12 to form a slider neck in accordance with my invention. First the slider is inserted into a die block 66 having a trough 68 provided therein which has a slot 68 on one of its inclined surfaces to slidably receive the bail member 41 and position thelslider The trough opens into the lower surface of the die block 66 to allow the bottom bent portion 18 of the V-shaped slider normally maintain the same in its uppermost position. Projecting from the upper surface of the die block 18 is a plunger 82 having a rounded convex forming surface (see Figs. 8, 9. and The top of the said plunger 82 is adapted to'be positioned slightly below the lower portion 18. of the V-shaped slider when said slider is initially locked betweenthe die

blocks

56 and 62, as indicated in Fig. 8. The die

blocks

66 and 62 are then simultaneously moved downward towards the die block 18, the neck portion 18 of the slider being pressed against the resiliently mounted plunger not discernible to the naked'eye, and like the bail web portions 48 and 58 they act toall intents and;

82 and thus forcing the portion 18 inwardly between the walls of the

wings

66 and 68 until the vportion l8 assumes the inverted shape shown in Figs. 10 and l1, and abuts against the female die cavity 86 provided for this purpose at the tip of the finger 68. By resiliently mounting the plun er 82 I prevent the portion 18' from being struck free from the rest of the slider.) By forcing the portion 18 backwards into the slider a deep well 86 is formed in the slider neck perpendicular to the slider wings, the

upper portions

88 and 88 of the side walls of said well being firmly pressed against the

adjacent ends

92 and 94 of the slider .wings. These adjacent portions are so tightly pressed together that the seam between them is purposes as a single integral piece of metal.

By thus providing a heavy piece-of metal at the juncture between the neck and the slider wings I appreciably reinforce the'same against bending at this point. However, the dimension of the plunger 82 corresponding to the height of the slider is less than the distance between the slider wings so that most of the well 86 is hidden from v sight when viewed from the-front or back wing of the slider, and thus provid s a highly attractive appearance to the slider- T At this stage in the formation of the slider neck the upper edges 96 and 88 (see Fig. 10)

of the groove 86 are spaced apart a relatively I large distance to provide diverging walls in said groove. After initially forming the groove 88 the wings of the slider are bent into parallel superposed relation, as shown in Figs. 11 and 12. This causes the

upper edges

86 and 88 to approach each other, as shown in Fig. 12, and impart a nearly closed shape to the neck section.

The slider may finally be shaped to bring it to dimensions and to remove the slightly prov truding. edges adjacent theupper end of the groove, which are shown in Fig. 11, and thus provide the finished appearance indicated in Figs.

13 through 18. From Figs. 13-16 it will be seen that the transverse wallsv I88 and I82 of the maintain the

slider plates

66 and 68 in spaced 7 relationship; but that these webs are for the most to protrude. A cooperating die block 62, which is mounted for reciprocation into the block 66, has

a finger portion 84 which is adapted to enter between the inner walls of the

wings

66 and 68 of the slider and to tightly press the same against the block 86 and lock the slider between the die blocks 66 and 62. Below the block 88 I provide --a table inserts a station r o suitably groove 86 provide extremely deep webs which part concealed beneath the slider wings and thus avoid the unsightly appearance which would be caused by a deep V indented in the neck of the slider.

I have found that a slider constructed in accordance with my invention oifers about 58% more resistance to'spreading or compressing of the slider plates and does not tend to jam either originally or. during continued use due to misalignment of the slider flanges.

It will thus be seen that there is Provided "device and method for making the same in which the several objects of this invention are achieved...

and which is well adapted to meet the conditions ainst the lower surface of the die bl k 18 to (ii of practical use, I v

As various possible embodiments mightbe made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein-set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in alimiting sense. 7

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a method of manufacturing a sheet metal slider for a slide fastener, the steps comprising disposing a pair of slider wings interconnected by an integral neck portion in angular relationship with respect to each other, indenting the neck portion and then bending said wings into parallel superposed relationship.

2. In a method of manufacturing a sheet metal slider for a slide fastener from a blank including a pair of wings interconnected'by an integral neck, the steps comprising disposingsaid wings in relatively angular relationship, creasing said neck transversely of the planes of said wings and from one to the other of said angularly disposed wings to such an extent that the bottom of the formed crease near the front and back of said slider is below the adjacent edges of said wings, and then bending said wings into parallel superposed relationship.

3. In a method of manufacturing a'sheet metal slider for a slide fastener, the. steps comprising disposing a pair of slider wings interconnected by an integral neck portion in angular relationship with respect to each other, indenting a deep well in said neck portion, and bending said wings into parallel superposed relationship.

4. In a method of manufacturing a sheet metal .slider for a slide fastener comprising a pair of parallel wings interconnected by an integral neck,

that step comprising creasing said neck transversely of the planes of said wings and from one to the other of said wings to such an extent that I forming a cup on one of the wings, pressing oppositely disposed portions of said cup into abutment with each other, and pressing portions of said cup into the plane of said wing. 7

9. A sheet metal slider for a slide fastener comhas an elongated inwardly extendingindentation therein whose longitudinal axis is transverse to the planes of said wings.

10. A sheet metal slider fora slide fastener comprising a pair of parallel sheet metal wings interconnected by an integral sheet metal neck which has an elongated inwardly extending indentation .therein whose longitudinal axis is transverse to the planes of said wings, the bottom of said indentation being below the adjacent top edges of said wings. Q

11. A sheet metal slider fora slide fastener comprising a. pair of parallel sheet metal wings interconnected by an'integral sheet metal neck which has an elongated inwardly extending indentation therein whose longitudinal axis is transverse to the planes of said wings, said neck having an inwardly bowed arcuate cross-section in a plane parallel to the direction of travel of the bottom of the formed crease near the frontand back of said slider is below the adjacent edges of saidwlngs.

5. In a method of manufacturing a sheet metal slider for a slide fastener wherein said slider the slider and including the. longitudinal axis of said indentation.

12. A sheet metal slider for a slide fastener comprising a pair of parallel sheet metal wings interconnectedby an integral sheet metal neck which has an elongated'inwardly extending in-" dentation therein whose longitudinal axis is transverse to the planes of said wings, said neck having an inwardly bowedarcuate cross-section in a planeparallel to the direction of travel of the slider and including the longitudinal axis of said indentation, and an inwardly bowed arcuate cross-section in a plane perpendicular to said first named plane and likewise. direction of travel of the slider.

13. A sheet metal slider for a slide fastener comprising av pair of parallel wings interconcomprises a pair of slider wings interconnected v by an integral neck portion, the steps comprising forming a cup on one of said wings, pressing oppositely disposed portions of said cup into abutment with each'other, pressing portions of said cup into the plane of said wing, indenting a deep well in said neck, and compressingwall portions of said well against said wings.

6. In a method of manufacturing a sheet metal slider for a slide fastener, the steps .comprising forming a cup on one of the wings and collapsing oppositely disposed portions of said cup into juxtaposition beneath an intermediate portion" of the said cup between the portions collapsed. while leaving said intermediate portion uncollapsed to provide a rim around the juxtaposed collapsed portions extending to both sides thereof.

7. In a method of manufacturing a sheet metal slider for a slide fastener, the steps comprising provide a rim around said web extending to both sides of the plane thereof.

8. In a method of manufacturing a sheet metal slider for a slide fastener, the steps comprising nected by an integral neck, said neck.h'aving an indentation therein between said wings, the ends of the bottom of said indentation lying adjacent said wings, the bottom of said indentation intermediate the ends thereof being no higher than said ends.

14. A sheet metal slider for a slide fastener comprising a pair of parallel wings interconnected byan integral neck, said neck having an indentation'thereln between said wings, the ends of said indentation lying adjacent said wings, said ends being higher than the portion of the bottom between them. r

15. A sheet metal slider for a slide fastener comprising a pair of wings having spaced parallel plane portions interconnected by an integral neck, said neck having an indentation therein two walls whereof extend transversely between said wings and converge toward the bottom of said slider; the top edges of said plane portions adjacent the part of the neck where said walls converge being at least as high as the external surface of said part.

16. A sheet metal. slider for a slide fastener comprising a pair of wings interconnected by an leaving said intermediate portion uncollapsed to integral neck, said neck having a well comprising a. bottom. two sides parallel to said wings and two sides perpendicular to said wings, said bottom and the two sides parallelto the wings being disposed wholly between said wings, the two sides perpendicular to said wings having a substantial portion thereof disposed between said wings.

parallel to the i being disposed wholly between said wings, the

two sides perpendicular to said wings having a substantial portion thereof disposed between said wings, the neck of said well being constricted.

18. A sheet metal slider for a slide fastener comprising a pair of wings interconnected by an integral-neck, said neck having a well comprising a bottom,-two sides parallel to .said wings and two sides perpendicular to said wings, said bottom and the two sides parallel to the wings being disposed wholly between said wings, the two sides perpendicular to said wings having a substantial portion thereof disposed between said wings, the two sides which are parallel to said wings having the upper portions thereof compressed against said wings.

19. A sheet metal slider for a slide fastener comprising a pair of wings interconnected by an integral neck, said neck having a wellformed therein of elongate, closed, cross-section along a plane adjacent the bottom'of said well, which plane is perpendicular to said wings and extends from side to side thereof, the major dimension ofsaid cross-section being disposed transversely of said wings.

. tions each integrally connected along an edge 20. A sheet metal slider for a slide fastener comprising a pair of imperfora'te wings interconnected by an integral neck portion, said neck having a deep well formed therein, said well in-' cluding a bottom and four sides and being substantially fully concealed between said wings, portions of said well lying adjacent said wings being'compressed against said wings, one of said wings having a bail integral therewith.

21. A sheet metal slider for a slide fastener having a pair-of parallel sheet metal win s interconnected by a neck, a bail on one of said said web including two plane sheet metal porthereof to said wing and extending away therefrom and said rim including asheet metal strip having inturned edges each of which isvintegrally connected to the extended edge of oneof the plane web portions, the sheet metal strip and inturned edges thereof being integrally connected to said wing at the ends of said bail.

23. A sheet metal slider for a slide fastener having a pair of parallel sheet metal wings interconnected by a neck, an intgeral bail on one of said wings which terminates short of the edges of said wing, the central web of said bail comprising a pair of juxtaposed bent portions which together form a wall of double thickness, said bent portions being integral with said wing and being integrally connected to each other at the ends of said bail.

24. A sheet metal slider for a slide fastener having a pair of parallel sheet metal wings interconnected bye neck, one of said wings being imperforate and having an integral bail thereon which terminates short of the edges of said wing, the central web of said bail comprising a pair of abutted parallel walls integral with said wing and integrally connected to each other at the ends of said bail. h

25. A sheet metal slider for a slide fastener having a pair of parallel sheet metal wings interconnected by a neck, one of said wings being imperforate and having an integral bail thereon which terminates short of the edges of said wing and extends therefrom, said bail having a cenhaving a pair of parallel sheet metal win s inwings integrally formed from the material of the wing in the vicinity of the bail, said ball terminating short "of the edges of said wing and comprising a web which is directly connected to and extends integrally away from said wing and a rim on the extended edge of said web which projects to both sides thereof, said rim being integrally connected to saidwing at the ends of said ball.

22. A sheet metal slider for a slide fastener having a pair of parallel sheet metal wings interconnected by a neck, a bail on one of said wings integrally formed from the material of the wing in the vicinity oi the bail, said bail terminating shortof the edges of said wing and com-- prising a web. which extends integrally away from said-wing and a rim on the extended edge of said web which projects 'to both sides thereof,

terconnected by a neck, one of said wings being imperforate and having an integral bail thereon,

said ball including a web comprising a pair of parallel abutted portions integral with and perpendicular to said wing and a wall disposedabout the outer periphery of said web, said wall having inturned longitudinal edge portions abutting said wall and integral with said web port one. I

27. A sheet metal slider for a slide fastener having a-pairof parallel sheet metal wings interconnected by a neck, one of said wings being imperforate and having an integral bail thereon, said bail comprising a thinned portion having a segment disposed in the plane of said wing, a pair of parallel abutting segments forming the web of said bail, and a segment disposed about the periphery of said web part, said last segment having inturned longitudinal edges integral with said web segments.

. ABRAHAM savrrzxr.