US2736940A

US2736940A - Separable fastener stringers employing separated coupled scoops

Info

Publication number: US2736940A
Application number: US254040A
Authority: US
Inventors: Louis H Morin
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-10-31
Filing date: 1951-10-31
Publication date: 1956-03-06
Anticipated expiration: 1973-03-06

Description

March 6, 1956 L. H. MO

SEPARABLE FASTENER RIN 2,736,940 INGERS EMPLOYING SEPARATED 00 ED scooPs 2 Sheets-Sheet 1 Filed Oct. 51 1951 ATTORNE? L. H. MORIN 2,736,940 E FASTENER STRINGERS EMPLOYING EPARATED COUPLED scoops 2 Sheets-Sheet 2 March 6,. 1956 SEPARABI Filed Oct. 31, 1951 INVENTOR LOUIS H. MORIN BY I 0 ATTORNEY United States PatentOi SEPARABLE F ASTENER STRINGERS EMPLOYING SEPARATED COUPLED SCOOPS Louis H. Morin, Bronx, N. Y.

Application October 31, 1951, Serial No. 254,040

8 Claims. (Cl. 24205.13)

This invention relates to separable fasteners, wherein the stringers have scoops spaced longitudinally thereof and, wherein, the scoops of opposed stringers are directly opposed and coupled with each other and, wherein, no coupling engagement is provided between adjacent scoops so that, in the resulting fastener, a definite spacing is maintained between the pairs of coupled scoops longitudinally of the stringer. More particularly, the invention deals with a scoop construction, wherein a single stringer may be utilized in forming a complete fastener and, wherein, the structure of the scoop lends itself to the use of dies produced by powder metallurgy, whereby die costs in production of fasteners of the kind under consideration are materially reduced.

The novel features of the invention will be best understood from the following description, when taken together with'the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and in which:

Fig. 1 is a side view of a portion of two stringers showing two pairs of coupled scoops on the stringers.

Fig. 2 is a section substantialy on the line 22 of Fig. 1, with part of the construction broken away and in section.

Fig. 3 is a diagrammatic perspective view ofone of the scoops of the stringer shown at the left of Fig. 1.

Fig. 4 is a diagrammatic perspective view of one of the scoops shown on the stringer at the right of Fig. 1.

n Fig. 5 is a view similar to Fig. 3, showing a modification.

Fig. 6 is a view, similar to Fig. 4, showing the same modification as illustrated in Fig. 5. I

Fig. 7 is a view similar to Fig. 1 showing an angular arrangement of the mounting end portion of the scoops on a pair. of stringers.

Fig. 8 is a side view of segmental portions of a pair of scoops in angular relationship to each other and illustrating another form of the scoop structure.

Fig. 9 is diagrammatic perspective view of the lefthand scoop ,of Fig. 8.

Fig. 10 is a diagrammatic perspective view of the righthand scoop of Fig. 8.

Fig. 11 is a view, similar to Fig. 7, showing another form of scoop structure; and

Fig. 12 is a sectional view, substantially on the line 12- 12 of Fig. 11, showing the scoops detached with part of the construction in section.

In Figs. 1 to 4, inclusive, I have shown one form of construction, in which two beaded stringer tapes 15, 15' are employed and spaced longitudinally of the edge of the tape 15 are disposed a series of similar scoops 16, the scoops 16' of the companion stringer 15 being identical to the scoops 16 and simply arranged in a reversed relationship thereto in establishing the coupling engagement.

Each

scoop

16, 16 has, at one side thereof, an outwardly projecting hook-shaped male coupling head or member 17, 17' having a recessed lower surface 18, 18'

I each other centrally of the scoop to retain the scoop whereas the rib 22' is adapted to enter the recess 18 of the head 17.

The recess, or female coupling portion 20, 21', is also partially formed by an outwardly projecting flange or shoulder 23, 23' which-forms a male coupling element of the scoop and the opposite side of the scoop is recessed,

as seen at 24, 24' at the upper portion of the head17, 17', so as to receive the coupling member of the opposed scoop. In other words, the coupling member 23 enters the recess 24' of the scoop 16; whereas, the member 23' enters the recess 24 of the scoop 16. This establishes a direct coupling engagement of the

members

23, 23 with against transverse separation. This same result is, of course, accomplished by engagement of the adjacent surfaces of the heads 17, 17' with each other. However, the heads 17, 17 establish the engagement in one direction; whereas, the

members

23, 23 establish the engagement in the opposite direction.

The adjacent surfaces of the heads 17, 17, as well as the

members

23, 23 will be flared outwardly, so as to insure and simplify coupling engagement of opposed In this connection, it will be noted from a conthe heads 17, 1'7 and the

recesses

20, 20 flare outwardly to the sides of the scoops to facilitate bending of the stringers, keeping in mind that, by reason of the wide spacing of the coupled scoops on the stringer tapes, an

fitinuously engaged scoop column. As will appear from portions 33, 33' are concerned, are the same as the couand a rounded upper surface 19, 19'. At the opposite a consideration of Fig. 1 of the drawing, one pair of scoops 16, 16' are spaced from and totally independent of the adjacent pair of similar scoops.

In Figs. 5 and 6 of the drawing, I have shown perspective views, similar to Figs. 3 and 4, of a modification in thescoop structure and, in these figures, 25, 25' represent scoops generally the same as the

scoops

16, 16 with the exception that the

coupling heads

26, 26 are modified in contour as are also the contour of the recesses 27, 27'

.and the

coupling rib

23, 28 is also modified in its contour, particularly in the contraction of the outer edge portion of said

rib

28, 28" to a slight extent, as indicated at 29, 29 to facilitate coupling engagement of the scoops. The coupling rib 28, 28' is also longer, i. e., projects forwardly more than the rib 22, 22' so that 28 overlaps 28 to retain the coupled scoops against transverse separation. These scoops have the female coupling portions, or sockets, 30, 30' generally similar to the sockets 20, 20'.

By overlapping 28, 28, I have also dispensed with the

coupling members

23, 23 in Figs. 5 and 6. In other words, the upper edge portions 31, 31' of the scoop is substantially transversely straight, aside frornthe slight taper, and these edge portions will be in close proximity when the scoops are coupled together.

In Fig. 7 of the drawing, I have shown a modification of the construction shown in Figs. 1 to 4, wherein scoops 32, 32' are employed which, as far as the coupling end pling end portions of the scoops shown in Figs. 5 and 6 and are modified solely to the extent that the mounting end portions 34, 34' are disposed on the beaded tapes 35, 35' in an angular direction forming a chevron, or

herring-bone type of scoop structure. As the scoops 32,

Patented Mar. 6, 1956 I an igen i 32 are otherwise of the same form, no furtherdetailed description will be given.

In Figs. 8, 9 and 10 of the drawing, 1 have shown a still further modification of the. structure shown in- Figs. 1: to 7, whe ein scoops 36, 36' have

rounded coupling members

37,, 37" with deeply

rounded recesses

38, 38 on the under-surfaces thereof which are. adapted to. receive upwardly extended rounded. coupling.

members

39, 39 of the opposed stringers.

.The'

members

39, 33 partially form the sockets, or

female coupling portions

49, 40" for reception of the

male couplings

37, 37." and these. recesses extend deeply-- into. the body of the. scoop and have. upwardly and outwardlyextended. rounded surfaces. 41, 41' which substantially. conform to. the upper

rounded surfaces

42, 42 of the. members 37, 37'. It will be apparent, however, from a consideration of Fig. 8 of the drawing, in which the scoops are indicated as angularly disposed, that the coupling. members 37:, 37', in entering the female coupling portionsor. sockets 40, are free toswi-ngthereinto, whilethe. upwardly curved projections 39-, 39 are free to pass into, the. recesses 38, 38'.

It: will be understood that, in the respective coupling engagements, 3.7! enters 4012\nd. 37 enters 40'; whereas, 316 1116118 38 and. 395 enters 38. The scoopstructure of the type and kind illustrated in. Figs. 8- to 10, inclusive, will insure. easy coupling. engagement between opposed scoops of the. stringers.

In. Figs. 1 1 and 1 2 of the drawing, I have shown a modification of the construction shown in Figs. 8, 9 and 10, wherein scoops 43, 44. are employed and disposed upon

tapes

45, 46,.the mounting

end portions

47, 48 ofthe scoopsbeingangularly disposed and; with this-construction, it will be understood that two differentstringers are employed, that is. to say, a left stringer and a right stringer in establishing thecoupling engagement.

The stringer 45. with the scoops 43 thereon have transverse femalecouplingportions 49 extending the full'width of; the. scoop, as. seen. in Fig. 12, the female coupling portion being. partially formed by'an upwardly extending rounded coupling member 50 at the lower port-ion thereof and; an. outwardly projecting. shoulder or flange -1 at the upper portion thereof. The member 50- and: flange 51 havea vertical recess 52 0pening outwa-rdly through the edge of: thescoop; the. scoops 44 of the stringer 46 have an outwardly. projecting and downwardly curvedmale coupling, member 53 extending the full width of-the scoop, as-seen in Fig. 12 and, at theupper-portion oft-he couplingmembe'r, is aprojecting lugor couplingelement 54, whichis substantially. half=round in cross-sectional form, note- Fig, l2; to fit snugly. in. thehalf-round recess 52- in the scoop. 43. stringer 45; will be. of the same construction, as well as allgs'coops 4.4 of the stringer 46.

The. male. coupling; member 53 has a recess 55 on, the under-surface thereof: for reception of the member 50 in coupling. the. scoops against pull-apart separation;-

whereas, the coupling-member, or element, 54,, engaging.

the recess 52, retains the coupled scoops against trans: verse. separation,

It will beapparent from a consideration of Fig. Zof;

the drawingthat tapers are provided on the surfaces; of theseveralscoops, which tapers areexaggeratedin Fig, 2

ofithe drawing, and are also exaggerated in thelarge pen.

sp ectiv showings in Figs. 2 to 6, inclusiverwhereas, they are not shown in Figs, 9 and 10, thelatter figures showing whatmight be considered the normal coupling engage ment which brings adjacent surfaces of the small normal siZed scoops into what appears to be a direct abutting engagement with each other. The actual taper providingclearancefor removing the scoops fronrthedieswould'be extremely slight, These. showings havebeen exaggerated in some figures; as noted above simply to illustrate this; feature. In other words, the showing in the drawing must be regarded as diagrammatic, both as to the lack of With this construction, all scoops of the showing. in taper of Figs. 9 and 10. and. the. exaggerated showing of taper in Figs. 2 to 6, inclusive.

Considering the chevron-type of scoops, such for example, as shown in Figs. 7 and 11, and noting particularly Fig. 7 of the drawing, it will appear that, when a separating strain is applied to the stringers, for example, in the direction of the

arrows

56, 56, the tendency would be to further swing thescoops downwardly in the direction. ofthe arrows 57, 57'-, resulting in further tightening the grip between the scoops, thus the greater the tension to separate the fastener, the tighter the scoops will hold together,

By reason of the manner of constructing the scoops, dies for producing the scoops may bepractically and economically made by powder metallurgy, thus materially reducing production costs, particularly when a large number of dies are required in production of fasteners of the kind under consideration. The form of the scoops considered. with respect to the parting line is such as. to provide die cavities which can withstand the pressure re quired in forming powdered metal dies. It will also be apparent that the scoops may be formed of any suitable material and, by reason of the structure of the male and female. couplings provided, a strong and substantial coupling engagement is provided between the scoops. The scoops may be formed individually or in multiples in asingle casting. operation, depending entirelyupon the process; employed.

Thescoops in the various showings may be said to havehook-shape male coupling portions, the hooks being directed downwardly and undercut female coupling portions or sockets, the bottom walls of the sockets having upwardly extending ridges. or hook portions interfitting withthe hook-shaped male coupling portions of the scoop. With the exception of the showing in Figs. 11 and 12, each scoop has male and female coupling portions, both of which are disposed at side portions of the scoop and the scoops include other interengaging means for retaining the scoops against transverse separation by overlapping parts. of the scoops or providing other male and female coupling portions.

Considering the scoops of Figs. 1-10 in a little more detail, it is apparent that each scoop is characterized by being integrally formed in one piece. Each scoop of one stringer engages a single scoop on the opposite stringer. The coupling end portion of each scoop has flat uppermost and lowermost urfaces that are parallel. The length of each scoop is greater than its width and the width is greater than its height. Each scoop has at one side of the forward end of the coupling end portion a downwardly turned central projection, an upper recess above said projection, and a lower recess disposed below the projection (in Fig. 3, for example, note projection 17, upper recess 24, and lower recess 18); and each scoop ha s at the other sideof said forward endof the coupling endportion a central recess extending angularly upwardly. relatively. to said parallel upper and lower scoop surfaces, an upper projection vertically spaced above the central recess, andan upwardly-turned lower projection vertically spaced below the central recess. (in Fig. 3, note. central, recess 20, upper projection 23, and lower projection 22). Oneof; the said upper and lower projections. has a forward edge which extends continuously. across the width of thescoop (note projection 22 inFig. 3 or projection 31 in Fig. 5 ,'for example. Each of the'said recesses opens throughthe ,forward end of the coupling end portion. The.

in er. engage he r ondin r c ssesnd. p aise tionsof a scoop of. the; opposite stringer to couple said;

t ussrsa sli pr id er c s i stp ll-an n at tudinal, and transverse separation of the coupled scoops.

Also, each said projection and recess of a scoop lies within contour lines defined by the said uppermost and lowermost surfaces of the scoop when the latter is viewed in side elevation, and the upper surfaces of the coupling end portions of each pair of coupled scoops are parallel to the lower surfaces thereof.

In Figs. 11 and 12 of the drawing, a female scoop is provided on one stringer and a male scoop on the opposed stringer; whereas, in the other figures, the scoops are of the same construction on each stringer.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a separable fastener comprising a pair of stringers, each stringer comprising a tape having spaced, integrally formed, one piece scoops die cast thereon, each scoop having a coupling end portion extending from the tape edge and a mounting end portion on the tape, the improvement wherein each scoop of one stringer engages a single scoop on the opposite stringer; the coupling end portion of each scoop having flat uppermost and lowermost surfaces that are parallel, the length of each scoop being greater than its width and the width greater than its height; each scoop having at one side of the forward end of the coupling end portion a downwardly'turned central projection and a lower recess disposed below the projection; each scoop having at the other side of said forward end of the coupling end portion a central recess extending angularly upwardly relatively to said parallel upper and lower scoop surfaces, an upper projection vertically spaced above the central recess, and an upwardly turned lower projection vertically spaced below the central recess, one of said upper and lower projections having a forward edge which extends continuously across the width of said scoop; each of said recesses opening through said forward end of the coupling end portion; said central projection and lower recess of said one side being of substantially the same height as said central recess and lower projection, respectively, of said other side; the projections and recesses of each scoop of one stringer engaging the corresponding recesses and projections of a scoop of the opposite stringer to couple said stringers and to provide interlocks against pull-apart, longitudinal, and transverse separation of the coupled scoops; each said projection and recess of a scoop lying within contour lines defined by said uppermost and lowermost surfaces of the scoop when the latter is viewed in side elevation, and upper surfaces of the coupling end portions of each pair of coupled scoops being parallel to lower surfaces thereof.

2. In a separable fastener comprising a pair of stringers, each stringer comprising a tape having spaced, integrally formed, one piece scoops die cast thereon, each scoop having a coupling end portion extending from the tape edge and a mounting end portion on the tape, the improvement wherein each scoop of one stringer engages a single scoop on the opposite stringer; the coupling end portion of each scoop having fiat uppermost and lowermost surfaces that are parallel; each scoop having at one side of the forward end of the coupling end portion a central projection and a recess spaced from said projection; each scoop having at the other side of said forward end of the coupling end portion a central recess and a pair of vertically spaced projections each vertically spaced from the central recess, one of said vertically spaced projections having a forward edge which extends continuously across the width of said scoop; each of said recesses opening through said forward end of the coupling end portion; said central projection of said one side being of substantially the same height as said central recess of said other side; the projections and recesses of each scoop of one stringer engaging the corresponding recesses and projections of a scoop of the opposite stringer to couple said stringers and to provide interlocks against pull-apart, longitudinal, and transverse separation of the coupled scoops; each said projection and recess of a scoop lying within contour lines defined by said uppermost and lowermost surfaces of the scoop when the latter is viewed in side elevation, and upper surfaces of the coupling end portions of each pair of coupled scoops being parallel to lower surfaces thereof.

3. In a separable fastener comprising a pair of stringers, each stringer comprising a tape having spaced, integrally formed, one piece scoops die cast thereon, each scoop having a coupling end portion extending from the tape edge and a mounting end portion on the tape, the improvement wherein each scoop of one stringer engages a single scoop on the opposite stringer; each scoop having at one side of the forward end of the coupling end portion a central projection and a recess spaced from said projection; each scoop having at the other side of said forward end of the coupling end portion a central recess and a pair of vertically spaced projections each vertically spaced from the central recess, one of said vertically spaced projections having a forward edge which extends continuously across the width of said scoop; each of said recesses opening through said forward end of the coupling end portion; said central projection of said one side being of substantially the same height as said central recess of said other side; the projections and recesses of each scoop of one stringer engaging the corresponding recesses and projections of a scoop of the opposite stringer to couple said stringers and to provide interlocks against pull-apart, longitudinal, and transverse separation of the coupled scoops.

4. In a separable fastener comprising a pair of stringers, each stringer comprising a tape having spaced, integrally formed, one piece scoops die cast thereon, each scoop having a coupling end portion extending from the tape edge and a mounting end portion on the tape, the improvement wherein each scoop of one stringer engages a single scoop on the opposite stringer; each scoop throughout its length having flat uppermost and lowermost surfaces that are parallel, the length of each scoop being greater than its width and the width greater than its height, each scoop having a generally flat, rectangular form; each scoop having at one side of the forward end of the coupling end portion a downwardly turned central projection and a lower recess below the projection; each scoop having at the other side of said forward end of the coupling end portion a central recess extending angularly upwardly relatively to said parallel upper and lower scoop surfaces, an upper projection above the central recess, and an upwardly turned lower projection below the central recess; each of said recesses opening through said forward end of the coupling end portion; said central projection of said one side being transversely alined with and of substantially the'same height as said central recess of said other side; the projections and recesses of each scoop of one stringer engaging the corresponding recesses and projections of a scoop of the opposite stringer to couple said stringers, the central projection of one scoop engaging the central recess and overlapping both the lower and central projections of an opposite scoop to provide an interlock against pull-apart separation and against longitudinal and transverse separation in one direction of the coupled scoops, and the lower projection of said one scoop engaging the lower recess and overlapping the central projection of said opposite scoop to provide a further interlock against pull-apart separation and an interlock against longitudinal separation in the other direction; each said projection and recess of a scoop lying within contour lines defined by said uppermost and lowermost surfaces of the scoop when the latter is viewed in side elevation, and upper surfaces of each pair of coupled scoops being parallel to lower surfaces thereof throughout the combined lengths of said coupled scoops.

5. The separable fastener of claim 4 in which said lower projection of said one scoop overlaps the lower projection of said opposite scoop to provide an interlock against transverse separation in the other direction.

arsenic) he s pa ab a e e bf a m 4 n hi h s i upper projection of said one scoop overlaps the upper. projection of-said opposite scoop tdprovide'an interlock against transverse separation in the other direction.

'7. In a separable fastener comprising a pair of stringers, each stringer comprising a tape having spaced, integrally formed, one piece scoops die cast thereon, each scoop having a coupling end portion extending from the tape edge and a mounting end portion on the tape, theimprovement wherein each scoop of one stringer engages a single scoop on the opposite stringer; each scoop throughout its length having fiat uppermost and lowermost surfaces that are parallel, the length of each scoop being greater than its width and the width greater than its height, each scoop having a generally flat, rectangular form; each scoop having at one side of the forward end of the coupling end portion a, downwardly turned centralprojection, an upper recess vertically spaced above said projection, and a lower recess vertically spaced'below the projection; each scoop having at the other side of said forward end of the coupling end portion a central recess extending angularly upwardly relatively to said parallel upper and lower scoop surfaces, an upper projection vertically spaced above the central recess, and an upwardly turned lower projection vertically spaced below the central recess, said lower projection having a forward edge which extends continuously across said scoop and into said one side to partially definev said lower recess; each of said recesses opening through said forward end of the coupling end portion; said upper recess, central projection/and lower recess of said one side being transversely alined with and of substantiallythe same height as said upper projection, central recess, and lower projection, respectively, of said other side; the projections and recesses of each scoop of one stringer engaging the corresponding recesses and projections of a scoop of the opposite stringer to couple said stringers, the central projection of one scoop engaging the central recess and overlapping both the lower and central projections of an opposite scoop to provide an interlock against pull-apart separation and against longitudinal and transverse separation in one. direction of the coupled scoops,-, the upper pro jection of said one scoop extending into the upper re cess and; overlapping the upper projection of said opposite scoop to provide an interlock against transverse separation in the other direction, and the lower projection of said one scoop engaging the lower recess and being integrally formed and having a coupling end por tion. and a mounting end portion, the improvement wherein said scoop engages a single opposed scoop; said scoop having at one side of the forward end of the coupling end portion a central projection. and a recess spaced from; said projection; said scoop having; at the.

other side of said forward end of the coupling end portion a central recess and a pair of vertically. spaced projections each vertically spaced from the. central recess, one of said vertically spaced projections having,

a forward edge which extends continuously across, the

width of said scoop; each of-said recesses opening through said forward end of the coupling end portion; said central projectionof said one side being of substantially the same height as said central recess of. said other side.

References Cited in thefileof this patent UNITED STATES PATENTS 2,219,657 Morin 0a. 29, 1940 2,554,929 Sundback May 29, 1951 FOREIGN PATENTS 265,064. Great Britain. of 1927 548,898 Germany of 1932