US4607777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stapler
Assignee: Etna Corp
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Filing: 1985-09-05
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Granted: 1986-08-26
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Expires: 2005-09-05
Abstract
Abstract The present invention provides an improved and new stapler including a base with an anvil at the forward end thereof, a hollow frame for containing a set of staples and a handle having an integral staple driver formed therein, all of which are molded from a synthetic resin material, said hollow frame including a primary fulcrum element extending downwardly from the underside of said hollow frame at the intermediate point between the opposite ends thereof and an auxiliary fulcrum element extending upwardly from the top face of said hollow frame adjacent to the rearward end thereof, said base including a recess formed therein for receiving the primary fulcrum element of said frame, and said handle including another recess formed therein for receiving the auxiliary fulcrum element on said frame.
Inventors
- 👤 Yoshiyuki Ebihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
B; B25; B25C; B25C5/00; B25C5/02; B25C5/0221; B25C5/0242; B25C5/025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A stapler comprising a base with an anvil at the forward end, a hollow frame comprising a magazine for containing a clip of staples, and a handle having an integrally formed staple driver, all of which are molded from a synthetic resin material; the hollow frame including a primary fulcrum element extending downwardly from the frame's underside at a point intermediate the opposite frame ends, and an auxiliary fulcrum element extending upwardly from the frame's top face at a point adjacent the frame's rearward end; said base including a primary recess formed in it for receiving the frame's primary fulcrum element; and said handle including an auxiliary recess formed in it for receiving the frame's auxiliary fulcrum element.
Claim 2
Dependent Claim
118 words
A stapler comprising a base with an anvil at the forward end, a hollow frame comprising a magazine for containing a clip of staples, and a handle having an integrally formed staple driver, all of which are molded from a synthetic resin material; the hollow frame including a primary fulcrum element extending downwardly from the frame's underside at a point intermediate the opposite frame ends, and an auxiliary fulcrum element extending upwardly from the frame's top face at a point adjacent the frame's rearward end; said base including a primary recess formed in it for receiving the frame's primary fulcrum element; and said handle including an auxiliary recess formed in it for receiving the frame's auxiliary fulcrum element.
Claim 3
Dependent Claim
29 words
A stapler as defined in claim 1, wherein a resilient means is integrally formed on the frame for engaging the inner wall of the handle in the assembled stapler.
Claim 4
Dependent Claim
18 words
A stapler as defined in claim 1 or 2, wherein the base includes integrally formed strengthening rib means.
Claim 5
Dependent Claim
161 words
A stapler comprising: (a) an intermediate tubular frame for containing a clip of staples and including (i) a resilient primary fulcrum element extending downwardly from the frame's underside at a point intermediate the frame ends, (ii) an auxiliary fulcrum element extending upwardly from the frame's top side adjacent the frame's rear end, and (iii) a passage opening, at the frame's forward end, through which staples can be driven of the frame one at a time; (b) a base having (i) an integrally formed primary recess for receiving the frame's primary fulcrum at a corresponding point intermediate the base ends, and (ii) an anvil, for bending staples, in the base's top side at its forward end; (c) an operating handle having (i) an integrally formed recess within its rear end for receiving the frame's auxiliary fulcrum; and (ii) an integrally formed downwardly extending staple driver at its front end; and (d) resilient handle spring means between the frame and the operating handle.
Claim 6
Dependent Claim
161 words
A stapler comprising: (a) an intermediate tubular frame for containing a clip of staples and including (i) a resilient primary fulcrum element extending downwardly from the frame's underside at a point intermediate the frame ends, (ii) an auxiliary fulcrum element extending upwardly from the frame's top side adjacent the frame's rear end, and (iii) a passage opening, at the frame's forward end, through which staples can be driven of the frame one at a time; (b) a base having (i) an integrally formed primary recess for receiving the frame's primary fulcrum at a corresponding point intermediate the base ends, and (ii) an anvil, for bending staples, in the base's top side at its forward end; (c) an operating handle having (i) an integrally formed recess within its rear end for receiving the frame's auxiliary fulcrum; and (ii) an integrally formed downwardly extending staple driver at its front end; and (d) resilient handle spring means between the frame and the operating handle.
Claim 7
Dependent Claim
25 words
The stapler of claim 4 wherein the handle spring means is a resilient arm attached to the frame's top and joining it an oblique angle.
Claim 8
Dependent Claim
27 words
The stapler of claim 4 or 5 wherein the tubular frame is loaded with a clip of staples that is resiliently biased towards the frame's passage opening.
Claim 9
Dependent Claim
25 words
The stapler of claim 4 or 5 wherein the tubular frame and its primary and auxiliary fulcrum elements are integrally molded from a plastic material.
Claim 10
Dependent Claim
17 words
The stapler of claim 7 wherein the handle spring means is also integrally molded of plastic material.
Claim 11
Dependent Claim
17 words
The stapler of claim 8 wherein the base and handle are each molded from a plastic material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |