US4386861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dot matrix impact printer
Assignee: Citizen Watch Co Ltd
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Filing: 1981-06-18
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Granted: 1983-06-07
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Expires: 2001-06-18
Abstract
Abstract A dot matrix impact printer for color printing comprising a platen and a print wire. The platen comprises a plurality of members made of porous material containing different colors. The print wire and platen member are driven to a position adjacent each other and the print wire is moved to force a paper to the platen, so that a dot is printed on the paper with color ink contained in the corresponding member of the platen.
Inventors
- 👤 Toshio Kurihara
- 👤 Masao Kunita
- 👤 Makoto Yasunaga
- 👤 Satoru Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:24
CPC Classifications
B; B41; B41J; B41J27/00; B41J27/02; B41J27/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A dot matrix impact printer comprising a platen comprising a plurality of disk members disposed side by side in the axial direction of the platen, each of said disk members being made of a porous material, impregnated with a colour ink different from the ink of the adjacent member; a print wire carrier juxtapositioned to and slidably mounted along the axial line of said platen having a plurality of print wires provided on said print wire carrier, each of said print wires being adjacent to a corresponding disk member; a print wire driving unit provided on said print wire carrier for moving said each print wire to said platen; means for shifting said print wire carrier along the axial line of said platen; means for shifting said platen along the axial line thereof to keep the respective adjacent relationship to the corresponding print wire; and means for feeding a printing medium in the direction perpendicular to the moving direction of said print wire.
Claim 2
Dependent Claim
163 words
A dot matrix impact printer comprising a platen comprising a plurality of disk members disposed side by side in the axial direction of the platen, each of said disk members being made of a porous material, impregnated with a colour ink different from the ink of the adjacent member; a print wire carrier juxtapositioned to and slidably mounted along the axial line of said platen having a plurality of print wires provided on said print wire carrier, each of said print wires being adjacent to a corresponding disk member; a print wire driving unit provided on said print wire carrier for moving said each print wire to said platen; means for shifting said print wire carrier along the axial line of said platen; means for shifting said platen along the axial line thereof to keep the respective adjacent relationship to the corresponding print wire; and means for feeding a printing medium in the direction perpendicular to the moving direction of said print wire.
Claim 3
Dependent Claim
28 words
A dot matrix impact printer according to claim 1, further comprising means for continuously rotating said platen as said platen moves a printing width in the axial direction.
Claim 4
Dependent Claim
28 words
A dot matrix impact printer according to claim 1 wherein at least one of said disk members of said platen is different from the other members in size.
Claim 5
Dependent Claim
39 words
A dot matrix impact printer according to claim 2 said means for rotating said platen comprising a guiding shaft having a helical groove on the periphery thereof, and an inside projection of said platen engaged with said helical groove.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |