US3578131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Typewriter with extended writing line
Assignee: International Business Machines Corp
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Filing: 1968-11-08
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Granted: 1971-05-11
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Expires: 1988-11-08
Abstract
Abstract The writing line of a typewriter is extended by combining movements of the paper and of a type element carrier. Incremental letter feed is accomplished by movement of the type element carrier along a writing line past the paper which is normally stationary. Upon reaching an advanced position, the type element carrier is restored in the reverse direction and the paper is advanced to present the next letter space to the type element in its restored position. Continued typing advances the type element carrier incrementally to the end of the writing line. Operation of a line-return key restores the carrier directly to a new line left-hand margin position, indexes the paper to a new line and restores the paper to its original beginning-of-line position.
Inventors
- 👤 William A Heidt
- 👤 Leon E Palmer
- 👤 John O Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:14
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/60; B41J19/00; B41J19/18; B41J19/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
226 words
A printer having a frame, cooperative printing means supported on said frame and including a character forming portion and a paper supporting portion positioned adjacent thereto, said character forming portion and said paper supporting portion defining a printing point therebetween, means supporting said paper supporting portion on said frame for lateral movement, track means supporting said character forming portion on said frame for lateral movement of said printing point parallel to the lateral movement of said paper supporting portion to define a writing line, and a letter space feed control for moving one of said portions incrementally in lateral individual letter space steps to define the spacing increments between adjacent characters printed by saiD character forming portion, wherein the improvement comprises: multiletter-space feeding means for moving when operated, the other of said portions by increments including a plurality of said spacing increments, selectively to at least a home position and to an advanced position relative to said frame, return means operatively connected to said one of said portions for selectively restoring said one of said portions in a counter-letter feed direction to a first predetermined position relative to said frame, and transfer control means responsive to the attainment of a second predetermined position of said one of said portions relative to said frame for selecting operation of both said return means and said multiletter-space feeding means.
Claim 2
Dependent Claim
226 words
A printer having a frame, cooperative printing means supported on said frame and including a character forming portion and a paper supporting portion positioned adjacent thereto, said character forming portion and said paper supporting portion defining a printing point therebetween, means supporting said paper supporting portion on said frame for lateral movement, track means supporting said character forming portion on said frame for lateral movement of said printing point parallel to the lateral movement of said paper supporting portion to define a writing line, and a letter space feed control for moving one of said portions incrementally in lateral individual letter space steps to define the spacing increments between adjacent characters printed by saiD character forming portion, wherein the improvement comprises: multiletter-space feeding means for moving when operated, the other of said portions by increments including a plurality of said spacing increments, selectively to at least a home position and to an advanced position relative to said frame, return means operatively connected to said one of said portions for selectively restoring said one of said portions in a counter-letter feed direction to a first predetermined position relative to said frame, and transfer control means responsive to the attainment of a second predetermined position of said one of said portions relative to said frame for selecting operation of both said return means and said multiletter-space feeding means.
Claim 3
Dependent Claim
101 words
A printer as defined in claim 1 further comprising: a start-of-line defining stop selectively conditionable to at least two conditions only one of which is effective to arrestingly engage said one portion during counter letter-feed movement thereof, said return means including means responsive to cooperative engagement between said one portion and said start-of-line defining stop when in its effective condition, for terminating said return movements, and said transfer control means including an initiate-transfer member defining said second predetermined position for operating both said return means and said multiletter-space feeding means and for conditioning said start-of-line defining stop to an ineffective condition.
Claim 4
Dependent Claim
83 words
A printer as defined in claim 2 further comprising: line feed means for advancing paper transverse to said writing line and including a line feed power member operable upon operation of said return means, a line feed drive member, and severable connection means normally interconnecting said power and drive members; and wherein said transfer control means further comprises sequence control means operable in response to operation of said initiate-transfer member for severing said severable connection means prior to operation of said return means.
Claim 5
Dependent Claim
178 words
A printer as defined in claim 2 wherein said letter space feed control further comprises: impositive force means for continuously urging said one of said portions in forward writing line direction, and a letter feed control member normally opposing the urging of said impositive force means; said return means comprises an overpowering selectively operable drive means operatively connected to said one of said portions for moving said one of said portions in the counter-letter feed direction, and a line return control member selectively operable to activate said drive means and to disable the urging opposing action of said letter feed control member; and further comprising means responsive to the relative position of said one of said portions and said start-of-line defining stop and to the position of said other of said portions for selectively inhibiting the response of said drive means to operation by said line return control member whenever said one of said portions is positioned between said first predetermined position and said start-of-line defining stop and said other portion is not in its said home position.
Claim 6
Dependent Claim
137 words
A printer having a frame, cooperative printing means supported on said frame and including a character forming portion and a paper supporting positioned adjacent thereto, said character forming portion and said paper supporting portion defining a printing point therebetween, means supporting said paper supporting portion on said frame for lateral movement, and track means supporting said character forming portion on said frame for lateral movement of said printing point parallel to the lateral movement of said paper supporting portion to define a writing line, wherein the improvement comprises: a letter-space feed control for moving said character forming portion incrementally in lateral individual letter-space steps to define the space between adjacent characters printed by said characTer forming means, and manually controllable means for positioning said paper supporting portion laterally along said frame independently of said character forming position.
Claim 7
Dependent Claim
137 words
A printer having a frame, cooperative printing means supported on said frame and including a character forming portion and a paper supporting positioned adjacent thereto, said character forming portion and said paper supporting portion defining a printing point therebetween, means supporting said paper supporting portion on said frame for lateral movement, and track means supporting said character forming portion on said frame for lateral movement of said printing point parallel to the lateral movement of said paper supporting portion to define a writing line, wherein the improvement comprises: a letter-space feed control for moving said character forming portion incrementally in lateral individual letter-space steps to define the space between adjacent characters printed by said characTer forming means, and manually controllable means for positioning said paper supporting portion laterally along said frame independently of said character forming position.
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |