US4328919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stitchers
Assignee: Xerox Corp
•
Filing: 1979-12-21
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Granted: 1982-05-11
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Expires: 1999-12-21
Abstract
Abstract A wire stitcher for binding sets of sheets has a driver for driving a staple through a set and an active clincher for bending over the ends of the staple legs to form clinches. The clincher includes an ear having a first groove in a side edge for catching the end of a driven staple leg and initiating bending of the leg and a second, narrower groove in an end edge, which is contiguous with the groove and aligns the leg and completes the bending thereof. A transition groove portion connects the grooves at the junction of the edges.
Inventors
- 👤 Brian R. Lawrence
- 👤 Peter M. Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:18
CPC Classifications
B; B27; B27F; B27F7/00; B27F7/17; B27F7/19
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A wire stitcher for binding a set of sheets having a driver for driving a staple through a set, and an active clincher for bending over the ends of the staple legs to form clinches, the improvement wherein the clincher includes a clincher ear having a first groove for catching the end of the staple and initiating bending of the leg and a second narrower groove contiguous with said first groove for aligning the leg and completing the bending thereof, said first and second grooves are respectively formed in a side edge and an end edge of said ear with a transition groove portion between said grooves at the junction of said edges.
Claim 2
Dependent Claim
113 words
A wire stitcher for binding a set of sheets having a driver for driving a staple through a set, and an active clincher for bending over the ends of the staple legs to form clinches, the improvement wherein the clincher includes a clincher ear having a first groove for catching the end of the staple and initiating bending of the leg and a second narrower groove contiguous with said first groove for aligning the leg and completing the bending thereof, said first and second grooves are respectively formed in a side edge and an end edge of said ear with a transition groove portion between said grooves at the junction of said edges.
Claim 3
Dependent Claim
77 words
The invention according to claim 1 wherein the clincher includes a set clamping surface and two clincher ears, said ears being movable between a retracted position behind said surface in which their side and end edges are respectively inclined towards and away from each other in the direction away from the set clamping surface and a clinch completed position in which the side edges are generally parallel and the end edges project slightly beyond said clamping surface.
Claim 4
Dependent Claim
31 words
The invention according to claim 2 wherein said end edges are inclined away from each other by an angle of not more than eight degrees when in the clinch completed position.
Claim 5
Dependent Claim
12 words
The invention according to claim 3 wherein said angle is five degrees.
References Cited (Backward Citations)
DE610274C
Cited
US1169339A
Cited
US1612870A
Cited
US1852060A
Cited
US2585807A
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US2979722A
Cited
US2987729A
Cited
US3796364A
Cited
US3804317A
Cited
US3981425A
Cited
US4194666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |