Patent US4433925A successfully refreshed from Google Patents.
US4433925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually-operated dot printer for pocket sized calculators
Assignee: Suwa Seikosha KK
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Filing: 1981-11-10
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Granted: 1984-02-28
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Expires: 2001-11-10
Abstract
Abstract A manually operated dot printer designed for use in a pocket sized calculator or a small sized electronic device includes a printing head which is manually movable across a sheet of printing paper in one direction. A pulse generating circuit produces a signal in synchronization with the speed of travel of the printing head. While the printing head is moving in said one direction, the printing head effects electrically controlled printing operations with dots in response to the signal produced by the pulse generating circuit. As the printing head is advanced, spring means store energy which is applied to return the printing head and advance the printing paper.
Inventors
- 👤 Hitoshi Fujiwara
- 👤 Masanao Matsuzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:58
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/68; B41J19/70; B41J19/72; B41J25/00; B41J25/304; B41J25/316; B41J3/00; B41J3/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A printer for printing on a recording paper, comprising: feed means for advancing said paper, said feed means including at least two separate feed rollers mounted on a feed shaft; printing head means, said head means being mounted on said feed shaft for translation relative to said paper for printing a line of characters thereon, said printing head means being movable between said separate feed rollers; means for translating said printing head means for said printing; printing means mounted on said printing head means and moving therewith, said printing means being subjected to actuation for printing on said paper when said printing head means is moved relative to said paper.
Claim 2
Dependent Claim
110 words
A printer for printing on a recording paper, comprising: feed means for advancing said paper, said feed means including at least two separate feed rollers mounted on a feed shaft; printing head means, said head means being mounted on said feed shaft for translation relative to said paper for printing a line of characters thereon, said printing head means being movable between said separate feed rollers; means for translating said printing head means for said printing; printing means mounted on said printing head means and moving therewith, said printing means being subjected to actuation for printing on said paper when said printing head means is moved relative to said paper.
Claim 3
Dependent Claim
49 words
A printer as claimed in claim 1, and further comprising spring means, said spring means being adapted to store energy when said printing head means is translated in one direction across said paper, said spring means translating said head means in the opposite direction and powering said feed means.
Claim 4
Dependent Claim
14 words
A printer as claimed in claim 2 wherein said printing means is electrically operated.
Claim 5
Dependent Claim
15 words
A printer as claimed in claim 3, wherein said print means is a dot printer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |