US4616765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinge structure with torsion bar for electrophotographic copying machine
Assignee: Sharp Corp
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Filing: 1985-10-07
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Granted: 1986-10-14
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Expires: 2005-10-07
Abstract
Abstract An electrophotographic copying machine comprises an upper body, a lower body, a torsion bar for lifting the first body upward, and a spacer for controlling the stressing force of the torsion bar. The spacer, preferably, a wedge is forced between a crank and a crank stopper of the torsion bar. A thumbscrew is further provided for controlling to force the spacer between the crank and the crank stopper.
Inventors
- 👤 Tutomu Katoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:40
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/1642; G03G21/1647; G03G21/1604; G03G21/1623; G03G21/1628; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/1678; G03G2221/1687
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
53 words
An electrophotographic copying machine comprising: first body means accommodating parts of the electrophotographic copying machine; second body means accommodating the other parts of the copying machine; torsion bar means for stressing said first body means in a predetermined direction; and adjustment means provided for controlling the stressing force of said torsion bar means.
Claim 2
Dependent Claim
53 words
An electrophotographic copying machine comprising: first body means accommodating parts of the electrophotographic copying machine; second body means accommodating the other parts of the copying machine; torsion bar means for stressing said first body means in a predetermined direction; and adjustment means provided for controlling the stressing force of said torsion bar means.
Claim 3
Dependent Claim
37 words
The machine of claim 1, wherein said torsion bar comprises crank means, crank stopper means, and spacer means interposed between said crank means and said crank stopper means for controlling the force of said torsion bar means.
Claim 4
Dependent Claim
12 words
The machine of claim 2, wherein said spacer means is a wedge.
Claim 5
Dependent Claim
25 words
The machine of claim 2, further comprising means for forcing said spacer means toward the gap between said crank means and said crank stopper means.
Claim 6
Dependent Claim
19 words
The machine of claim 1, wherein said torsion bar means is provided at both sides of the copying machine.
References Cited (Backward Citations)
US4097145A
Cited
US4456141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |