Patent US4350987A successfully refreshed from Google Patents.
US4350987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing device
Assignee: Canon Inc
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Filing: 1980-08-21
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Granted: 1982-09-21
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Expires: 2000-08-21
Abstract
Abstract A printing device to perform character printing by urging a print head onto recording paper, the device being provided with a print head urging mechanism and paper forwarding mechanism. The paper forwarding mechanism has both the functions of automatic paper forwarding and manual paper forwarding, and, when paper is forwarded by manual operation, a force exerted from the manual operation acts on the abovementioned print head urging mechanism to cause the print head to separate from the recording paper.
Inventors
- 👤 Takayoshi Hanagata
- 👤 Atsushi Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:02
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/304; B41J25/316
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
A printing device comprising: a print head for performing printing on a recording paper; urging means for causing said print head to rotate towards and be urged into contact with said recording paper; paper forwarding means having a manual paper forwarding function and, at the time of the manual paper forwarding operation and under the action of a force derived from the manual paper forwarding function, for causing said print head to rotate away from said recording paper against the force exerted by said urging means toward the recording paper, wherein said paper forwarding means comprises: a paper forwarding rotary member with a paper forwarding power transmission wheel fixedly provided at one end of a rotational shaft thereof; a manual paper forwarding rotary member urged away from said power transmission wheel by a spring and movable to engage with said power transmission wheel against the force of said spring to thereby impart a paper forwarding force; and a transmission member engagable with said urging means when said manual member moves into engagement with said power transmission wheel to thereby cause said print head to rotate away from said recording paper.
Claim 2
Dependent Claim
190 words
A printing device comprising: a print head for performing printing on a recording paper; urging means for causing said print head to rotate towards and be urged into contact with said recording paper; paper forwarding means having a manual paper forwarding function and, at the time of the manual paper forwarding operation and under the action of a force derived from the manual paper forwarding function, for causing said print head to rotate away from said recording paper against the force exerted by said urging means toward the recording paper, wherein said paper forwarding means comprises: a paper forwarding rotary member with a paper forwarding power transmission wheel fixedly provided at one end of a rotational shaft thereof; a manual paper forwarding rotary member urged away from said power transmission wheel by a spring and movable to engage with said power transmission wheel against the force of said spring to thereby impart a paper forwarding force; and a transmission member engagable with said urging means when said manual member moves into engagement with said power transmission wheel to thereby cause said print head to rotate away from said recording paper.
Claim 3
Dependent Claim
26 words
A printing device according to claim 1, wherein said printing device includes a solenoid member for causing said print head to separate from the recording paper.
Claim 4
Dependent Claim
28 words
A printing device according to claim 1 or 2, wherein said printing device includes a motor to impart a paper forwarding force to said paper forwarding rotary member.
References Cited (Backward Citations)
US4000393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |