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Patent US4221489A successfully refreshed from Google Patents.
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US4221489A Expired / Lapsed US ⏱️ 0.0 years remaining

Self aligning paper feed roller assembly

Assignee: IBM Information Products Corp
•
Filing: 1978-11-06
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Granted: 1980-09-09
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Expires: 1998-11-06
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Abstract

Abstract A paper feed roll assembly is disclosed which is pivotally mounted on a central point with three degrees of freedom of movement. The feed rolls are engageable with the periphery of the platen. Additionally, the support for the paper feed rolls is deflectable about the central point by a feed roll release member to effect the withdrawal of the feed rolls from the periphery of the platen to enhance paper insertion and removal. The pivot point support provides for freedom of movement in the three necessary degrees of freedom to allow equilization of feed roll force against the platen and for alignment of the feed rolls with the periphery of the platen to insure proper paper feed. The feed roll truck frame, by virtue of its pivotal mounting, may be deflected downward to permit release or insertion of the paper. A deflection means or eccentric bar is disclosed for deflecting the truck member away from the periphery of the platen against the force of the pivot support acting toward the platen.

Inventors

  • 👤 Vencil D. Engle
  • 👤 Raymond M. Marowski
  • 👤 Edward E. Pollard
  • 👤 John L. Pullen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 22:27
CPC Classifications
B; B41; B41J; B41J13/00; B41J13/02; B41J13/036; B41J13/076

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 152 words
A feed roll assembly for a printer having a cylindrical platen, comprising: support means attached to said printer, pivot means supported on said support means a fixed distance from said platen, feed rolls supportively mounted on a shaft, a truck means for supporting said shaft, a plurality of said shafts supported rotatively by said truck means with said shafts in a parallel relation to each other, said truck means comprising a pivot bearing surface, said pivot bearing surface engaged to provide three degrees of rotational freedom with said pivot means, and deflectable about said pivot means, release means engageable with said truck means for deflecting said truck means about said pivot means and away from said platen, whereby said feed rolls will align parallel with the axis of said platen, when engaged with said platen and said truck means will rotate to equalize the forces between said feed rolls and said platen.
Claim 2
Dependent Claim 152 words
A feed roll assembly for a printer having a cylindrical platen, comprising: support means attached to said printer, pivot means supported on said support means a fixed distance from said platen, feed rolls supportively mounted on a shaft, a truck means for supporting said shaft, a plurality of said shafts supported rotatively by said truck means with said shafts in a parallel relation to each other, said truck means comprising a pivot bearing surface, said pivot bearing surface engaged to provide three degrees of rotational freedom with said pivot means, and deflectable about said pivot means, release means engageable with said truck means for deflecting said truck means about said pivot means and away from said platen, whereby said feed rolls will align parallel with the axis of said platen, when engaged with said platen and said truck means will rotate to equalize the forces between said feed rolls and said platen.
Claim 3
Dependent Claim 32 words
The feed roll assembly of claim 1 wherein said release means comprises an eccentric member for engaging deflectable portions of said truck means to deflect said truck means about said pivot means.
Claim 4
Dependent Claim 22 words
The feed roll assembly of claim 2 wherein said release means comprises a manual control member operatively associated with said eccentric member.
Claim 5
Dependent Claim 26 words
The feed roll assembly of claim 1 wherein said feed rolls are fixedly attached to said shafts and said truck means supports said shafts for rotation.
Claim 6
Dependent Claim 19 words
The feed roll assembly of claim 1 wherein said release means comprises a manual control member operatively associated therewith.

References Cited (Backward Citations)

US1453579A Cited
US1453582A Cited
US1910329A Cited
US1841116A Cited
US2121853A Cited
US2218108A Cited
US2297490A Cited
DE971816C Cited
US2848092A Cited
DE2124877A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1983-09-09 1984-03-10 1984-09-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1987-09-09 1988-03-10 1988-09-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1991-09-09 1992-03-10 1992-09-09 $7700.00 Window Closed / Lapsed

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