US3858704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape controlled line spacing and form feed mechanism
Assignee: Kurosawa Tele Communications Ltd
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Filing: 1972-05-23
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Granted: 1975-01-07
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Expires: 1992-05-23
Abstract
Abstract A high speed printer adapted for serially recording selected characters of a type wheel along the print line of a recording paper mounted on a platen. A line spacing mechanism for accurately turning the platen is driven by a motor for driving the type selection mechanism by way of a power transmission mechanism which is selectively driven according to the command signal for carrying out the desired line spacing operation. To attain stable and accurate operation, a detent mechanism is applied to the power transmission mechanism. A program reader is mounted on the printer in cooperation with the detent mechanism. A fine adjustment of the platen position is also applied to the power transmission mechanism.
Inventors
- 👤 Reijiro Kawano
- 👤 Kazuhiro Goda
- 👤 Hiroshi Yamakawa
- 👤 Osamu Ohhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:31
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/36; B41J11/42; B41J19/00; B41J19/76; B41J19/78
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
223 words
In a printer for serially recording selected characters of a type wheel along two print lines of a typewriting paper mounted on a platen provided with a platen shaft, by means of a type character selection mechanism driven by a motor, an improved line spacing mechanism comprising: a first shaft rotatably mounted to a side-frame of said printer in parallel condition to said platen shaft; intermediate power transmission means for continuously transmitting driving power of said motor to said first shaft; clutch means for selectively transmitting driving power of said first shaft to said platen shaft; means for actuating said clutch means in accordance with a command signal for carrying out a line spacing operation, said clutch means comprising a first clutch member rigidly mounted on said first shaft and a second clutch member mounted on said first shaft, said second clutch member being axially slideable and rotatable with respect to said first shaft, said second clutch member being engageable and disengageable with respect to said first clutch member responsive to said command signal and said actuating means; and, a pinion mounted on said first shaft, said pinion being axially slideable and rotatable with respect to said first shaft, said pinion being connected to said second clutch member, said platen shaft having a detent gear secured thereon in engaging disposition with said pinion.
Claim 2
Dependent Claim
223 words
In a printer for serially recording selected characters of a type wheel along two print lines of a typewriting paper mounted on a platen provided with a platen shaft, by means of a type character selection mechanism driven by a motor, an improved line spacing mechanism comprising: a first shaft rotatably mounted to a side-frame of said printer in parallel condition to said platen shaft; intermediate power transmission means for continuously transmitting driving power of said motor to said first shaft; clutch means for selectively transmitting driving power of said first shaft to said platen shaft; means for actuating said clutch means in accordance with a command signal for carrying out a line spacing operation, said clutch means comprising a first clutch member rigidly mounted on said first shaft and a second clutch member mounted on said first shaft, said second clutch member being axially slideable and rotatable with respect to said first shaft, said second clutch member being engageable and disengageable with respect to said first clutch member responsive to said command signal and said actuating means; and, a pinion mounted on said first shaft, said pinion being axially slideable and rotatable with respect to said first shaft, said pinion being connected to said second clutch member, said platen shaft having a detent gear secured thereon in engaging disposition with said pinion.
Claim 3
Dependent Claim
118 words
An improved line spacing mechanism according to claim 1 wherein said actuating means is a rotary clutch magnet provided with a shaft, said shaft of the rotary clutch magnet for rigidly supporting a clutch lever which controls the engagement and disengagement of said first clutch member with said second clutch member, said detent gear being selectively engageable with a detent roller where said engagement is controlled by a turning motion of said clutch lever of said rotary clutch magnet whereby said detent gear is disengaged from said detent roller while said second clutch member engages with said first clutch member and is alternatively engaged with said detent roller when said turning motion of said clutch lever is completed.
Claim 4
Dependent Claim
51 words
An improved line spacing mechanism according to claim 1, wherein said actuating means is a rotary clutch magnet provided with a shaft, said shaft of the rotary clutch magnet for rigidly supporting a clutch lever which controls the engagement and disengagement of said first clutch member with said second clutch member.
Claim 5
Dependent Claim
136 words
An improved line spacing mechanism according to claim 1, in which said platen shaft is arranged to be axially slidable by manual operation while maintaining an integrally rotatable connection with said platen, and wherein said platen shaft is further provided with a fine adjustment mechanism comprising a first rollet clutch member formed inside of said detent gear and a second rollet clutch member rigidly mounted on said platen shaft and a helical spring always urging said second rollet clutch member to engage with said first rollet clutch member, a platen knob rigidly mounted on a free end of said platen shaft, whereby, when said platen knob is pushed toward said platen said second rollet clutch member is disengaged from said first rollet clutch member so that saiD platen can be turned by turning said platen knob.
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |