US3634922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for forming coil for plastic slide fastener
Assignee: GSG Fasteners LLC
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Filing: 1970-08-26
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Granted: 1972-01-18
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Expires: 1990-08-26
Abstract
Abstract In a zipper coil former employing a pair of comb members moving the coil along a mandrel, the idea is to indent the sides of the coil by engaging them with a thickened portion of the spine of the combs.
Inventors
- 👤 John Emerson Burbank
- 👤 William Henry Lautenberger
- 👤 Patrick John Fasciano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:07
CPC Classifications
B; B29; B29D; B29D5/00; B29D5/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49782; Y10T29/49785; Y10T29/51; Y10T29/5101; Y10T29/53; Y10T29/53291
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A method of making a slide fastener which comprises winding a filament about a mandrel to form a helix, engaging the individual winDings of the formed helix between the successive teeth of two oppositely facing toothed members, the teeth of said members being spaced to define the pitch of the helix windings, and advancing the helix by transferring the helix windings in succession alternatingly from one toothed member to the other and by longitudinally moving one of the toothed members relatively to the other the distance of the pitch of a winding; and while supporting the helix on both sides of the toothed members, engaging a central portion of the helix with the spine of one of the toothed members to form an indentation in the side of the helix.
Claim 2
Independent Claim
130 words
A method of making a slide fastener which comprises winding a filament about a mandrel to form a helix, engaging the individual winDings of the formed helix between the successive teeth of two oppositely facing toothed members, the teeth of said members being spaced to define the pitch of the helix windings, and advancing the helix by transferring the helix windings in succession alternatingly from one toothed member to the other and by longitudinally moving one of the toothed members relatively to the other the distance of the pitch of a winding; and while supporting the helix on both sides of the toothed members, engaging a central portion of the helix with the spine of one of the toothed members to form an indentation in the side of the helix.
Claim 3
Dependent Claim
32 words
The method according to claim 1 wherein a central portion of the helix is engaged on opposite sides by both toothed members to form a helix product inwardly indented on both sides.
Claim 4
Independent Claim
154 words
An apparatus for making a slide fastener comprising two oppositely facing movable toothed members, the teeth of said toothed members being spaced to define the pitch of the helix windings to be formed, a mandrel leading into said toothed members, means for winding a filament about the mandrel to form a helix, and means for advancing the helix comprising means for moving one of the toothed members longitudinally with reference to the other and said mandrel for receiving successive windings of the helix from the mandrel and advancing the helix the space of a tooth pitch and means for moving said toothed members in unison transversely relatively to said mandrel for transferring the helix windings in succession from one toothed member to the other; means for supporting the helix on both sides of the toothed members, the spine of one of the toothed members engaging the central portion of the helix and indenting same.
Claim 5
Independent Claim
154 words
An apparatus for making a slide fastener comprising two oppositely facing movable toothed members, the teeth of said toothed members being spaced to define the pitch of the helix windings to be formed, a mandrel leading into said toothed members, means for winding a filament about the mandrel to form a helix, and means for advancing the helix comprising means for moving one of the toothed members longitudinally with reference to the other and said mandrel for receiving successive windings of the helix from the mandrel and advancing the helix the space of a tooth pitch and means for moving said toothed members in unison transversely relatively to said mandrel for transferring the helix windings in succession from one toothed member to the other; means for supporting the helix on both sides of the toothed members, the spine of one of the toothed members engaging the central portion of the helix and indenting same.
References Cited (Backward Citations)
US3137036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |