Slide fastener

Claim 2

An interdigitating fastener comprising: a core strip formed of relatively rigid material and having a substantially constant external cross-section along the length thereof and provided with a longitudinally extending serpentine through-slit, said strip defining a pair of separably interdigitated core portions; a carrier strip formed of a relatively resilient material positioned about said core strip and extending substantially the length of said core strip, said carrier strip being slit longitudinally to define a pair of separable carrier portions forming a pair of separable core and carrier portion assemblies having slit, accurately corresponding edges in overlying and underlying relationship to the longitudinal centerline of said serpentine through-slit of said core strip, said core portions further defining longitudinal edge portions secured in said carrier portions and complementary distal parts exposed outwardly of said carrier slit edges when one core and carrier portion assembly is separated from the other core and carrier portion assembly, said carrier slit edges being juxtaposed when said core and carrier portion assemblies are joined with said core portions interdigitated, cooperating aperture portions of said core strip and integral projecting portions of said carrier strip positioned therein and defining interlock means mechanically locking the paired core and carrier strip portions together; and means for selectively urging said assemblies together to interdigitate said core portions and juxtapose said carrier slit edges.

Claim 3

The interdigitating fastener of claim 1 wherein said core strip defines a plurality of through openings and said carrier strip includes portions formed as one piece with the carrier strip and extending through said through openings to define said interlock means.

Claim 4

The interdigitating fastener of claim 1 wherein said interlock means further comprises a rigid enlargement unitary with said respective core portions.

Claim 5

The interdigitating fastener of claim 1 wherein said interlock means further comprises a turned flange unitary with said respective core portions.

Claim 6

The interdigitating fastener of claim 1 wherein said carrier strip slit extends along the longitudinal centerline of the carrier strip.

Claim 7

The interdigitating fastener of claim 1 wherein said core strip slit is substantially symmetrically disposed relative to the longitudinal centerline of said core strip.

Claim 8

The interdigitating fastener of claim 1 wherein said core strip has a transverse cross-section widening to the longitudinal centerline of said core strip.

Claim 9

The interdigitating fastener of claim 1 wherein said core strip is formed of a relatively hard plastic.

Claim 10

The interdigitating fastener of claim 1 wherein said carrier strip includes opposite web portions projecting laterally outwardly to define attachment means.

Claim 11

The interdigitating fastener of claim 9 wherein said web portions are disposed at the transverse centerline plane of the fastener.

Claim 12

The interdigitating fastener of claim 9 wherein said web portions are disposed in flatwise alignment spaced from one face of said core strip.

Claim 13

The interdigitating fastener of claim 9 wherein said web portions are disposed in flatwise alignment and spacer means is provided on one carrier strip portion at said slit thereof supporting said web portions in spaced relationship to said core strip.

Claim 14

The interdigitating fastener of claim 1 further including substantially inextensible reinforcing means extending longitudinally of the core strip portion.

Claim 15

The interdigitating fastener of claim 1 wherein said core strip portions extend to adjacent the laterally outer surfaces of said carrier portions.

Claim 16

The interdigitating fastener of claim 1 wherein said assemblies are sealingly abutted along said carrier strip slit edges.

Claim 17

The interdigitating fastener of claim 1 wherein a slit of said carrier strip is provided with a V-shaped recess at one end of the fastener, and said means for urging said assemblies together comprises a slider including a diamond complementary to said recess, said diamond being received in said recess when said slider is disposed at said one end of the fastener permitting said assemblies to be sealed together fully to said one end by the abutment of the carrier strip portions at the carrier strip slit.

Claim 18

The interdigitating fastener of claim 1 wherein each of said carrier strips includes a portion extending about a portion of the associated core strip portion to positively lock the core strip portion in the assembly.

Claim 19

An interdigitating fastener comprising: a core strip including a pair of separable interlocked portions each defining an elongated base, and a series of spaced teeth projecting from and integral with said base portion, the teeth of one portion being spaced from the base of the other portion when said portions are interlocked to define a plurality of openings therebetween; and a carrier strip of material softer than the core strip material supporting said core strip, said carrier strip including integral portions extending through said openings and portions outwardly of said core strip base interlocking the core strip portion to the carrier strip.

Claim 20

An interdigitating fastener comprising: a core strip including a pair of separable interlocked portions each defining an elongated base, and a series of spaced teeth projecting from and integral with said base portion, the teeth of one portion being spaced from the base of the other portion when said portions are interlocked to define a plurality of openings therebetween; and a carrier strip of material softer than the core strip material supporting said core strip, said carrier strip including integral portions extending through said openings and portions outwardly of said core strip base interlocking the core strip portion to the carrier strip.

Claim 21

The interdigitating fastener of claim 18 wherein said base is provided with a substantially inextensible longitudinal reinforcement effectively precluding undesirable elongation of the core strip portion.

Claim 22

The interdigitating fastener of claim 19 wherein said reinforcement comprises a textile cord.

Claim 23

The interdigitating fastener of claim 19 wherein said core strip is formed of a thermoplastic material.

Claim 24

An interdigitating fastener comprising: a core strip formed of relatively rigid material and having a substantially constant external cross-section along the length thereof and provided with a longitudinally extending serpentine through-slit, said strip defining a pair of separably interdigitated core portions; a carrier strip formed of a relatively resilient material positioned about said core strip and extending substantially the length of said core strip, said carrier strip being slit longitudinally to define a pair of separable carrier portions forming a pair of separable core and carrier portion assemblies having slit, accurately corresponding edges in overlying and underlying relationship to the longitudinal centerline of said serpentine through-slit of said core strip, said core portions further defining complementary distal parts exposed outwardly of said carrier slit edges when one core and carrier portion assembly is separated from the other core and carrier portion assembly, said carrier slit edges being juxtaposed when said core and carrier portion assemblies are joined with said core portions interdigitated; and means for selectively urging said assemblies together to interdigitaTe said core portions and juxtapose said carrier slit edges, said core strip having a thick mid-portion with said distal parts narrowing outwardly to preclude facial engagement of the distal parts with the overlying and underlying surfaces of the carrier strip until said distal parts are fully received in the opposing core portion in the interdigitated arrangement thereof.

Claim 25

An interdigitating fastener comprising: a core strip formed of relatively rigid material and having a substantially constant external cross-section along the length thereof and provided with a longitudinally extending serpentine through-slit, said strip defining a pair of separably interdigitated core portions; a carrier strip formed of a relatively resilient material positioned about said core strip and extending substantially the length of said core strip, said carrier strip being slit longitudinally to define a pair of separable carrier portions forming a pair of separable core and carrier portion assemblies having slit, accurately corresponding edges in overlying and underlying relationship to the longitudinal centerline of said serpentine through-slit of said core strip, said core portions further defining complementary distal parts exposed outwardly of said carrier slit edges when one core and carrier portion assembly is separated from the other core and carrier portion assembly, said carrier slit edges being juxtaposed when said core and carrier portion assemblies are joined with said core portions interdigitated; and means for selectively urging said assemblies together to interdigitaTe said core portions and juxtapose said carrier slit edges, said core strip having a thick mid-portion with said distal parts narrowing outwardly to preclude facial engagement of the distal parts with the overlying and underlying surfaces of the carrier strip until said distal parts are fully received in the opposing core portion in the interdigitated arrangement thereof.