US3923141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual feed rate ribbon mounting and transport assembly
Assignee: TA Triumph-Adler GmbH
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Filing: 1974-07-01
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Granted: 1975-12-02
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Expires: 1994-07-01
Abstract
Abstract An assembly for accommodating either carbon or solvent film ribbons includes mechanism couplable to a driver in a machine which is effective to elevate and feed ribbon mounted therein. The mechanism incrementally feeds carbon ribbon at a first constant rate or solvent ribbon at a second constant rate and includes a transport roller for driving the periphery of a flange on a ribbon take-up spool and means for decreasing the angle of rotation of the transport roller as the diameter of wound ribbon on the take-up spool increases to provide a constant feed increment. A feature of the invention resides in the ability to exchange one assembly for another including assembly decoupling means, which serves to prevent unwinding of ribbbon from a supply spool and to maintain ribbon tension so that the assembly may be remounted again to use remaining unused ribbon.
Inventors
- 👤 Hans-Georg Hengelhaupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:09
CPC Classifications
B; B41; B41J; B41J35/00; B41J35/28; B41J33/00; B41J33/14; B41J33/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
206 words
A ribbon support and ribbon feed assembly comprising a support plate, vibrator means pivotally mounted on said support plate anD couplable to an oscillatable drive pin when the assembly is mounted for operation in a typewriter, a prewound ribbon supply spool and a take-up spool rotatably mounted on said support plate with ribbon extending between spools threaded through said vibrator means, a rotatable transport roller responsive to the movement of said vibrator means for incrementally rotating said take-up spool, means for sensing the diameter of wound ribbon on said take-up spool, means coupled to said sensing means for decreasing the angle through which said rotatable means is rotated by said vibrator means to maintain incremental advance of ribbon through said vibrator constant, a coiled spring clutch wrapped around said transport roller having an end extending radially therefrom, means for initially positioning said spring end in the path of and spaced a predetermined distance from said vibrator means, said spring being operable when engaged and driven by said vibrator means to rotate said transport roller an amount determined by the spacing between said spring end and said vibrator means, said take-up spool having a flange, and means coupling said transport roller to peripherally drive said spool flange.
Claim 2
Dependent Claim
206 words
A ribbon support and ribbon feed assembly comprising a support plate, vibrator means pivotally mounted on said support plate anD couplable to an oscillatable drive pin when the assembly is mounted for operation in a typewriter, a prewound ribbon supply spool and a take-up spool rotatably mounted on said support plate with ribbon extending between spools threaded through said vibrator means, a rotatable transport roller responsive to the movement of said vibrator means for incrementally rotating said take-up spool, means for sensing the diameter of wound ribbon on said take-up spool, means coupled to said sensing means for decreasing the angle through which said rotatable means is rotated by said vibrator means to maintain incremental advance of ribbon through said vibrator constant, a coiled spring clutch wrapped around said transport roller having an end extending radially therefrom, means for initially positioning said spring end in the path of and spaced a predetermined distance from said vibrator means, said spring being operable when engaged and driven by said vibrator means to rotate said transport roller an amount determined by the spacing between said spring end and said vibrator means, said take-up spool having a flange, and means coupling said transport roller to peripherally drive said spool flange.
Claim 3
Dependent Claim
35 words
An assembly as recited in claim 1, including a second clutch spring wrapped about said transport roller for precluding reverse rotation of said transport roller when said first spring end is restored to initial position.
Claim 4
Dependent Claim
77 words
An assembly as recited in claim 2, said means coupled to said sensing means comprising a link having a follower pin, a cam slot in said support plate for guiding said follower pin, said pin acting on said means for initially positioning said spring end to increase the distance between said spring end and said vibrator means in response to the sensing of an increased diameter of wound ribbon on said take-up spool by said sensing means.
Claim 5
Dependent Claim
76 words
An assembly as recited in claim 2, further comprising lever means to removably lock said assembly on a machine part, a drag spring normally loosely mounted around the supply spool, said lever means having a connection to said drag spring and to said second clutch spring whereby when moved to release said assembly it serves to tighten said drag spring and to drive said second spring to rotatably drive said transport roller in a feed direction.
Claim 6
Dependent Claim
49 words
An assembly as recited in claim 3, further including manually operable means for setting the distance between said first spring end and said vibrator means, said manually operable means moving said follower pin away from said cam slot, and itself serving to define a path for guiding said link.
Claim 7
Dependent Claim
69 words
An assembly as recited in claim 1, including a core mounting said take-up spool, said diameter sensing means comprising a lever pivoted on said support plate, a spring biasing said lever to bring its end into engagement with said take-up spool mounting core, and a pin on the end of said lever spaced from the periphery of the lever by at least the thickness of the take-up spool case.
References Cited (Backward Citations)
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |