US3693473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled pressure platen
Assignee: Unisys Corp
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Filing: 1970-10-30
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Granted: 1972-09-26
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Expires: 1990-10-30
Abstract
Abstract A controlled pressure platen is disclosed having a pair of actuating toggle linkages. A driving toggle linkage acts on a driven toggle linkage to move the platen at a controlled pressure. The driving toggle linkage has a biased resist point, the biasing of which determines the minimum pressure applied by the platen.
Inventors
- 👤 Robert W Beachner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:52
CPC Classifications
B; B41; B41L; B41L47/00; B41L47/42; B41L47/44; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20588
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A controlled pressure platen for use in an encoding apparatus for encoding information on items to be read by means of automatic character recognition equipment comprising; a platen rockable toward and away from a backup anvil with which said platen is associated adapted to receive a document for printing thereon, a pair of driving toggle linkages, a pair of driven toggle linkages, the driving toggle linkages depending from the break point of said driven toggle linkages, said driving toggle linkages being fixed to and pivotally movable with a cross shaft extending therebetween, said cross shaft being capable of slight vertical shifting movement effective to accommodate varying degrees of platen pressure, tension spring means biasing said cross shaft in a direction to resist movement of said toggle linkages effective to control said platen pressure, a drive shaft rotated by a single revolution clutch, and cam means on said drive shaft operably associated with both of said driving toggle linkages and said drive shaft to cause said linkages to reciprocate said platen toward and away from an item to effect printing thereon in response to rotative driving action of said cam means.
Claim 2
Dependent Claim
190 words
A controlled pressure platen for use in an encoding apparatus for encoding information on items to be read by means of automatic character recognition equipment comprising; a platen rockable toward and away from a backup anvil with which said platen is associated adapted to receive a document for printing thereon, a pair of driving toggle linkages, a pair of driven toggle linkages, the driving toggle linkages depending from the break point of said driven toggle linkages, said driving toggle linkages being fixed to and pivotally movable with a cross shaft extending therebetween, said cross shaft being capable of slight vertical shifting movement effective to accommodate varying degrees of platen pressure, tension spring means biasing said cross shaft in a direction to resist movement of said toggle linkages effective to control said platen pressure, a drive shaft rotated by a single revolution clutch, and cam means on said drive shaft operably associated with both of said driving toggle linkages and said drive shaft to cause said linkages to reciprocate said platen toward and away from an item to effect printing thereon in response to rotative driving action of said cam means.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |