US4238872A — Separable slide fastener chain and a method of pr…

Claim 1

Independent Claim 145 words

A separable slide fastener chain comprising a pair of oppositely disposed stringers of continuous length each having a support tape and a fastener element formed from a plastic monofilament into a continuous structure having coupling head portions and secured by sewn seams to a longitudinal inner edge of the respective tape, said fastener element being fused together over a predetermined length of the two coupled stringers at predetermined intervals, and a composite pin-forming structure located centrally of the fused length of the fastener element and cut out to produce a multi-form aperture having a pair of bay portions extending transversely of the fastener chain and oppositely disposed in point-symmetry relation and a pair of elongated canal portions extending longitudinally closely along the sewn seams, said composite structure being subdivisible across said bay portions into two identical pairs of slider-lock pin members and inserting pin members.

Claim 2

Dependent Claim 145 words

A separable slide fastener chain comprising a pair of oppositely disposed stringers of continuous length each having a support tape and a fastener element formed from a plastic monofilament into a continuous structure having coupling head portions and secured by sewn seams to a longitudinal inner edge of the respective tape, said fastener element being fused together over a predetermined length of the two coupled stringers at predetermined intervals, and a composite pin-forming structure located centrally of the fused length of the fastener element and cut out to produce a multi-form aperture having a pair of bay portions extending transversely of the fastener chain and oppositely disposed in point-symmetry relation and a pair of elongated canal portions extending longitudinally closely along the sewn seams, said composite structure being subdivisible across said bay portions into two identical pairs of slider-lock pin members and inserting pin members.

Claim 3

Dependent Claim 40 words

A separable slide fastener chain as claimed in claim 1 wherein said canal portions are tapered off and biased in opposite directions with the coupling head portions of the fastener element being transferred from one stringer to the other stringer.

Claim 4

Independent Claim 166 words

A method of producing a separable slide fastener chain comprising a pair of oppositely disposed stringers of continuous length each having a support tape and a fastener element formed from a plastic monofilament into a continuous structure having coupling head portions and secured by sewn seams to a longitudinal inner edge of the respective tape, which method comprises fusing a predetermined length of said fastener element integrally with said tape edge, shaping a composite pin-forming structure and cutting said structure through a multi-form aperture having a pair of bay portions extending transversely of the fastener chain and oppositely disposed in point-symmetry relation and a pair of elongated canal portions extending longitudinally along the sewn seams and having tapered end portions adapted to transfer the coupling heads from one stringer to the other stringer, said composite structure being subdivisible into two identical pairs of slider-lock pin members and inserting pin members by a line of cut extending transversely across the tapes in registry with said bay portions.

Claim 5

Independent Claim 166 words

A method of producing a separable slide fastener chain comprising a pair of oppositely disposed stringers of continuous length each having a support tape and a fastener element formed from a plastic monofilament into a continuous structure having coupling head portions and secured by sewn seams to a longitudinal inner edge of the respective tape, which method comprises fusing a predetermined length of said fastener element integrally with said tape edge, shaping a composite pin-forming structure and cutting said structure through a multi-form aperture having a pair of bay portions extending transversely of the fastener chain and oppositely disposed in point-symmetry relation and a pair of elongated canal portions extending longitudinally along the sewn seams and having tapered end portions adapted to transfer the coupling heads from one stringer to the other stringer, said composite structure being subdivisible into two identical pairs of slider-lock pin members and inserting pin members by a line of cut extending transversely across the tapes in registry with said bay portions.

Claim 6

Dependent Claim 29 words

The method as claimed in claim 3 further comprising biasing said tapered end portions in opposite directions such that a terminal meshing element loop on each stringer remain underformed.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-12-16	1984-06-16	1984-12-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-12-16	1988-06-16	1988-12-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-12-16	1992-06-16	1992-12-16	$7700.00	Window Closed / Lapsed

Separable slide fastener chain and a method of producing the same

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag