Patent US3586149A successfully refreshed from Google Patents.
US3586149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web tensioning apparatus
Assignee: Ricoh Printing Systems America Inc
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Filing: 1969-02-07
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Granted: 1971-06-22
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Expires: 1989-02-07
Abstract
Abstract Apparatus useful in a high speed printing device for automatically tensioning the paper to assure smooth and even movement. Edge perforated paper is employed which is pulled by a tractor drive mechanism from a fan folded supply stack through the automatic tensioning means and past a printing hammer bank. The automatic tensioning means is comprised of a series of elliptical springs mounted on rotatable adjuster rod adjacent one side of the paper and a backup bar having the same surface characteristics as the springs mounted on a resilient pad adjacent the other side of the paper.
Inventors
- 👤 Richard H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:22
CPC Classifications
B; B41; B41J; B41J15/00; B41J15/16
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
175 words
Web tensioning apparatus useful in combination with a drive system for pulling a web, said tensioning apparatus comprising: an elliptical leaf spring providing a first web engaging surface lying substantially in a plane defined by first and second orthogonal axes; means mounting said spring for restraining translation of said first web engaging surface only in a direction parallel to said first axis to thus permit resilient deflection of said first web engaging surface in a direction parallel to said second axis and parallel to a third axis orthogonal to said first and second axes; backup means providing a second web engaging surface extending substantially parallel to said first web engaging surface; means mounting said backup means for restraining translation of said second web engaging surface only in a direction parallel to said first and second axes to thus permit resilient deflection of said second web engaging surface in a direction parallel to said third axis; and means supporting said spring and backup means with said first and second web engaging surface opposed to one another.
Claim 2
Dependent Claim
175 words
Web tensioning apparatus useful in combination with a drive system for pulling a web, said tensioning apparatus comprising: an elliptical leaf spring providing a first web engaging surface lying substantially in a plane defined by first and second orthogonal axes; means mounting said spring for restraining translation of said first web engaging surface only in a direction parallel to said first axis to thus permit resilient deflection of said first web engaging surface in a direction parallel to said second axis and parallel to a third axis orthogonal to said first and second axes; backup means providing a second web engaging surface extending substantially parallel to said first web engaging surface; means mounting said backup means for restraining translation of said second web engaging surface only in a direction parallel to said first and second axes to thus permit resilient deflection of said second web engaging surface in a direction parallel to said third axis; and means supporting said spring and backup means with said first and second web engaging surface opposed to one another.
Claim 3
Dependent Claim
22 words
The web tensioning apparatus of claim 1 wherein said first and second web engaging surfaces exhibit substantially the same coefficient of friction.
Claim 4
Dependent Claim
54 words
means mounting said spring for restraining translation of said first paper engaging surface only in a direction parallel to said first axis to thus permit resilient deflection of said first paper engaging surface in a direction parallel to said second axis and parallel to a third axis orthogonal to said first and second axes;
Claim 5
Dependent Claim
54 words
means mounting said spring for restraining translation of said first paper engaging surface only in a direction parallel to said first axis to thus permit resilient deflection of said first paper engaging surface in a direction parallel to said second axis and parallel to a third axis orthogonal to said first and second axes;
Claim 6
Dependent Claim
17 words
backup means providing a second paper engaging surface extending substantially parallel to said first paper engaging surface;
Claim 7
Dependent Claim
17 words
backup means providing a second paper engaging surface extending substantially parallel to said first paper engaging surface;
Claim 8
Dependent Claim
34 words
The web tensioning apparatus of claim 1 wherein said elliptical leaf spring has first and second perimeter portions of lesser radius of curvature and third and fourth perimeter portions of greater radius of curvature.
Claim 9
Dependent Claim
30 words
The web tensioning apparatus of claim 3 wherein said means mounting said spring includes a rotatable adjuster rod; and means securing said spring third perimeter portion to said adjuster rod.
Claim 10
Dependent Claim
45 words
means mounting said backup means for restraining translation of said second paper engaging surface only in a direction parallel to said first and second axes to thus permit resilient deflection of said second paper engaging surface in a direction parallel to said third axis; and
Claim 11
Dependent Claim
45 words
means mounting said backup means for restraining translation of said second paper engaging surface only in a direction parallel to said first and second axes to thus permit resilient deflection of said second paper engaging surface in a direction parallel to said third axis; and
Claim 12
Dependent Claim
19 words
means supporting said spring and backup means with said first and second paper engaging surfaces opposed to one another.
Claim 13
Dependent Claim
19 words
means supporting said spring and backup means with said first and second paper engaging surfaces opposed to one another.
Claim 14
Dependent Claim
20 words
The web tensioning apparatus of claim 4 including means for adjusting and maintaining the rotational orientation of said adjuster rod.
Claim 15
Dependent Claim
20 words
The web tensioning apparatus of claim 1 wherein said backup means includes a flat strip adhered to a resilient pad.
Claim 16
Dependent Claim
66 words
A high speed printing device comprising: a movable character surface; a plurality of hammers supported opposite to said character surface and spaced therefrom to define a paper passageway therebetween; a paper drive means disposed proximate to the exit of said passageway for pulling paper therethrough; and a paper tensioning means disposed proximate to the entrance of said passageway for tensioning said paper, said tensioning means including:
Claim 17
Dependent Claim
66 words
A high speed printing device comprising: a movable character surface; a plurality of hammers supported opposite to said character surface and spaced therefrom to define a paper passageway therebetween; a paper drive means disposed proximate to the exit of said passageway for pulling paper therethrough; and a paper tensioning means disposed proximate to the entrance of said passageway for tensioning said paper, said tensioning means including:
Claim 18
Dependent Claim
31 words
The printing device of claim 7 wherein said passageway defined between said hammers and said character surface extends in a plane substantially parallel to said first and second paper engaging surfaces.
Claim 19
Dependent Claim
21 words
The printing device of claim 7 wherein said first and second paper engaging surfaces exhibit substantially the same coefficient of friction.
Claim 20
Dependent Claim
33 words
The printing device of claim 7 wherein said elliptical leaf spring has first and second perimeter portions of lesser radius of curvature and third and fourth perimeter portions of greater radius of curvature.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |