Patent US3753483A successfully refreshed from Google Patents.
US3753483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Typewriter dual feed apparatus
Assignee: Memorex Corp
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Filing: 1970-03-20
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Granted: 1973-08-21
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Expires: 1990-03-20
Abstract
Abstract A typewriter capable of conventional paper feed downward and to the rear of the platen cylinder or upward from below the platen cylinder as for computer paper. A single arm and linkage assembly provides for roller release for conventional feed in a first position and for retraction of the entire platen assembly for computer paper feed in a second position. A sprocket drive operating in conjunction with the platen cylinder for computer paper is provided.
Inventors
- 👤 I Lundquist
- 👤 J Pastrone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:37
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/26; B41J11/30; B41J11/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
In a typewriter having a case and a platen assembly including a rotatably mounted cylindrical platen, the improvement which comprises platen assembly support means attached to the case, a platen assembly rotatably mounted on said support means, a lever rotatably mounted on a pivot extending from the case, a first linking member linking the platen assembly to said pivoted lever, a lost motion channel in said first linking member such that the lever must be moved an appreciable distance before rotation of the platen assembly is initiated, roller means, for holding paper against the platen, mounted on a curved arm, a pin extending from the case and penetrating the cruved arm to permit rotation of the curved arm about the pin, and a second linking member linking the curved arm to said pivoted lever, said second linking member being attached to the lever by a pin, whereby movement of the lever moves the roller means away from the platen before rotation of the platen assembly is initiated.
Claim 2
Dependent Claim
167 words
In a typewriter having a case and a platen assembly including a rotatably mounted cylindrical platen, the improvement which comprises platen assembly support means attached to the case, a platen assembly rotatably mounted on said support means, a lever rotatably mounted on a pivot extending from the case, a first linking member linking the platen assembly to said pivoted lever, a lost motion channel in said first linking member such that the lever must be moved an appreciable distance before rotation of the platen assembly is initiated, roller means, for holding paper against the platen, mounted on a curved arm, a pin extending from the case and penetrating the cruved arm to permit rotation of the curved arm about the pin, and a second linking member linking the curved arm to said pivoted lever, said second linking member being attached to the lever by a pin, whereby movement of the lever moves the roller means away from the platen before rotation of the platen assembly is initiated.
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |