Patent US2125373A successfully refreshed from Google Patents.
Patent US4654673A successfully refreshed from Google Patents.
US4654673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal printer with graduated cam actuation
Assignee: Alps Alpine Co Ltd
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Filing: 1985-10-11
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Granted: 1987-03-31
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Expires: 2005-10-11
Abstract
Abstract A thermal printer including a cam for pivoting a carriage guide plate to cause a thermal head mounted on the carriage to approach/separate from a platen. The cam is of a mountain-shaped form whose one side for pivoting the carriage guide plate to release the thermal head in press-contact with the platen is made heightened than the other side to bring the thermal head into press-contact with the platen.
Inventors
- 👤 Saki Yanata
- 👤 Takahito Maruyama
- 👤 Chikashi Osakama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:05
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/304; B41J25/316
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
A thermal printer comprising a thermal head, a carriage mounted thereon with said thermal head and driven by a motor, a platen around which a recording paper is attached, a tape take-up device for rolling up a print tape in response to movement of said carriage, a tape cassette storing therein the print tape and provided detachably on said carriage, a carriage guide plate on which said carriage is provided movably, pivotable as to cause said thermal head and said platen to approach/separate from each other, a cam means for pivoting said carriage guide plate, and a cam operating means driven by said motor to actuate said cam means, characterized in that a cam employed for said cam means is of a mountain-shaped form whose one side for pivoting said carriage guide plate to release said thermal head in press-contact with said platen is made heightened than the other side to bring said thermal head into press-contact with said platen.
Claim 2
Dependent Claim
160 words
A thermal printer comprising a thermal head, a carriage mounted thereon with said thermal head and driven by a motor, a platen around which a recording paper is attached, a tape take-up device for rolling up a print tape in response to movement of said carriage, a tape cassette storing therein the print tape and provided detachably on said carriage, a carriage guide plate on which said carriage is provided movably, pivotable as to cause said thermal head and said platen to approach/separate from each other, a cam means for pivoting said carriage guide plate, and a cam operating means driven by said motor to actuate said cam means, characterized in that a cam employed for said cam means is of a mountain-shaped form whose one side for pivoting said carriage guide plate to release said thermal head in press-contact with said platen is made heightened than the other side to bring said thermal head into press-contact with said platen.
Claim 3
Dependent Claim
63 words
A thermal printer as set forth in claim 1, wherein the sliding surface of said cam is made up of a high station (47a), low station (47b), slope portion (47c) formed of a smooth curved surface joining the high station (47a) with the low station (47b), and a slant portion (47d) formed of a planar down-grade surface continuing from the high station (47a).
References Cited (Backward Citations)
US3761950A
Cited
US3855448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |