Patent US4881831A successfully refreshed from Google Patents.
US4881831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printer
Assignee: Panasonic Holdings Corp
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Filing: 1988-02-11
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Granted: 1989-11-21
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Expires: 2008-02-11
Abstract
Abstract The present invention relates to a printer which is capable of eliminating the slack of paper, wherein, at the time of printing, the paper is fed by a pinch roller, while, at the time of paper feeding, the paper is caused to slide relatively at least on a platen roller.
Inventors
- 👤 Masaaki Takita
- 👤 Yoshikazu Tsuru
- 👤 Toshiharu Kitagawa
- 👤 Yoshikazu Nomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:10
CPC Classifications
B; B41; B41J; B41J15/00; B41J15/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
A printer for use with an ink film comprising: a capstan roller; a pinch roller provided in correspondence with said capstan roller; a paper supply means arranged upstream of said capstan roller and said pinch roller; a printing head for applying heat to an ink film to be interposed between said printing head and paper to be printed; a platen roller provided with sliding friction, said capstan roller and said pinch roller clamping therebetween a paper to be printed fed from said paper supply means and feeding it to said platen roller; and, a paper feed roller disposed in correspondence with said platen roller, wherein said pinch roller and said capstan roller are disposed upstream of said paper feed roller and said platen roller but downstream of said paper supply means so as to apply a back tension to the paper during printing, while the paper is fed by said pinch roller, said capstan roller, said platen roller and said paper feed roller so as to cause the paper to slip on said platen roller, relative to said platen roller during paper feeding.
Claim 2
Dependent Claim
183 words
A printer for use with an ink film comprising: a capstan roller; a pinch roller provided in correspondence with said capstan roller; a paper supply means arranged upstream of said capstan roller and said pinch roller; a printing head for applying heat to an ink film to be interposed between said printing head and paper to be printed; a platen roller provided with sliding friction, said capstan roller and said pinch roller clamping therebetween a paper to be printed fed from said paper supply means and feeding it to said platen roller; and, a paper feed roller disposed in correspondence with said platen roller, wherein said pinch roller and said capstan roller are disposed upstream of said paper feed roller and said platen roller but downstream of said paper supply means so as to apply a back tension to the paper during printing, while the paper is fed by said pinch roller, said capstan roller, said platen roller and said paper feed roller so as to cause the paper to slip on said platen roller, relative to said platen roller during paper feeding.
Claim 3
Dependent Claim
26 words
A printer according to claim 1, wherein an amount of the paper fed by said platen roller is greater than that fed by said capstan roller.
Claim 4
Dependent Claim
16 words
A printer according to claim 1, wherein said platen roller is coated with a Teflon-based resin.
References Cited (Backward Citations)
US4327366A
Cited
US4750006A
Cited
US4698650A
Cited
US4668961A
Cited
US4738555A
Cited
US4693620A
Cited
US4769103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |