US3958738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Staple gun for accommodating a range of staple sizes
Assignee: USM Corp
•
Filing: 1975-11-13
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Granted: 1976-05-25
•
Expires: 1995-11-13
Abstract
Abstract A range of staple sizes, including different leg lengths as well as different leg spacings, is enabled to be handled by a single gun. The smallest leg spacing staples of the range are guided by a pair of spaced parallel inner rails of a magazine into driving position, the staples of greatest leg spacing straddle said rails and are guided by parallel outer walls of the magazine, and intermediate leg spacing staples are loosely guided by the inner rails and outer walls. A desirable alternative construction has these outer walls provided with centralizing leaf spring guides yieldable widthwise. No limitation on the leg lengths is imposed, and a spring-urged pusher in the magazine has its leading end provided with portions projecting inwardly widthwise thereof to insure advance of the narrowest as well as the widest staples.
Inventors
- 👤 Raymond M. Tremblay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:36
CPC Classifications
B; B25; B25C; B25C5/00; B25C5/16; B25C5/1637; B25C5/1641; B25C5/1658; B25C5/1679
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A staple gun having a body provided with a magazine base portion, including: a closure pivotable about its back end; a mechanism for reciprocably operating a driver at the front end of said gun for acting on successive foremost staples aligned therewith; a slider having spaced parallel walls movable in said magazine base portion for urging staples having the widest leg spacing of a range of staple sizes successively into the path of said driver to be driven thereby; and a pair of parallel staple supporting guide rails upstanding from said closure and extending toward its free end, said guide rails being spaced to accommodate the smallest leg spacing of a range of staple sizes while being equidistant from the walls of said slider, said slider also including on its forward end inwardly projecting portions extending substantially to each guide rail for providing uniform sliding pressure to any width staple encountered therewith.
Claim 2
Dependent Claim
152 words
A staple gun having a body provided with a magazine base portion, including: a closure pivotable about its back end; a mechanism for reciprocably operating a driver at the front end of said gun for acting on successive foremost staples aligned therewith; a slider having spaced parallel walls movable in said magazine base portion for urging staples having the widest leg spacing of a range of staple sizes successively into the path of said driver to be driven thereby; and a pair of parallel staple supporting guide rails upstanding from said closure and extending toward its free end, said guide rails being spaced to accommodate the smallest leg spacing of a range of staple sizes while being equidistant from the walls of said slider, said slider also including on its forward end inwardly projecting portions extending substantially to each guide rail for providing uniform sliding pressure to any width staple encountered therewith.
Claim 3
Dependent Claim
137 words
A staple gun having a body with a magazine base portion, including; a closure pivotable about its back end; a mechanism for reciprocably operating a driver at the front end of said gun for acting on successive foremost staples aligned therewith; a slider having spaced parallel walls movable in said magazine base portion for urging staples having the widest leg spacing of a range of staple sizes successively into the path of said driver to be driven thereby; and a pair of staple supporting guide rails upstanding from said closure and extending toward its free end, said guide rails being spaced to accommodate the smallest leg spacing of a range of staple sizes while being equidistant from the side walls of said slider, said gun also including staple centralizing and guiding means along said magazine base portion.
Claim 4
Dependent Claim
137 words
A staple gun having a body with a magazine base portion, including; a closure pivotable about its back end; a mechanism for reciprocably operating a driver at the front end of said gun for acting on successive foremost staples aligned therewith; a slider having spaced parallel walls movable in said magazine base portion for urging staples having the widest leg spacing of a range of staple sizes successively into the path of said driver to be driven thereby; and a pair of staple supporting guide rails upstanding from said closure and extending toward its free end, said guide rails being spaced to accommodate the smallest leg spacing of a range of staple sizes while being equidistant from the side walls of said slider, said gun also including staple centralizing and guiding means along said magazine base portion.
Claim 5
Dependent Claim
55 words
A staple gun as recited in claim 2, wherein said staple centralizing and guiding means is comprised of a pair of flexible leaf springs generally longitudinally mounted between the walls of said magazine base and is yieldably spreadable due to sliding contact of the legs of the respective staples with their respective leaf spring members.
Claim 6
Dependent Claim
18 words
A staple gun as recited in claim 3 wherein said leaf members are of an inwardly bowed configuration.
Claim 7
Dependent Claim
28 words
A staple gun as recited in claim 3 wherein each leaf spring is formed with a linear staple leg-engaging vertex, and the slider walls are of similar configuration.
References Cited (Backward Citations)
US1907849A
Cited
US2181387A
Cited
US2445178A
Cited
US2528444A
Cited
US2716749A
Cited
US3348752A
Cited
US3282490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |