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Patent US3669331A successfully refreshed from Google Patents.
US3669331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free floating pressure roller means and retracting mechanism for film drive
Assignee: Individual
•
Filing: 1971-03-04
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Granted: 1972-06-13
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Expires: 1991-03-04
Abstract
Abstract Slippage of a wide film engaged by a driving capstan is prevented by resiliently urging a pair of rollers mounted in a free floating yoke structure against the drive capstan. The yoke structure is guided by a frame means which also includes cam means for effecting the urging of the yoke structure. A lever element terminating in a hook is arranged to engage a bearing on the free end of the capstan to stabilize the same when the pressure rollers are in engagement with the capstan.
Inventors
- 👤 Walter Renold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:00
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/18; G03B1/20; G03B1/32; G03B21/00; G03B21/10; G03B21/11; G03B21/111; G03B21/113; G03D; G03D13/00; G03D13/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A pressure roller means for engagement against a drive capstan for moving film passing therebetween comprising, in combination: a. a yoke structure; b. at least two pressure rollers rotatably mounted in said yoke structure with their axes of rotation parallel to each other, the spacing between said rollers being less than the diameter of said capstan; c. frame means including guiding means permitting free limited movement of said yoke structure in all six degrees of freedom such that said yoke structure is free floating relative to said frame means; d. resilient means; and e. actuating means on said frame means cooperating with said resilient means to urge said pressure rollers against said capstan whereby the reaction force components transmitted to the supported end of said pressure rollers in said yoke structure are substantially equal.
Claim 2
Dependent Claim
134 words
A pressure roller means for engagement against a drive capstan for moving film passing therebetween comprising, in combination: a. a yoke structure; b. at least two pressure rollers rotatably mounted in said yoke structure with their axes of rotation parallel to each other, the spacing between said rollers being less than the diameter of said capstan; c. frame means including guiding means permitting free limited movement of said yoke structure in all six degrees of freedom such that said yoke structure is free floating relative to said frame means; d. resilient means; and e. actuating means on said frame means cooperating with said resilient means to urge said pressure rollers against said capstan whereby the reaction force components transmitted to the supported end of said pressure rollers in said yoke structure are substantially equal.
Claim 3
Dependent Claim
19 words
The subject matter of claim 1, in which said actuating means includes cam means for engaging said resilient means.
Claim 4
Dependent Claim
62 words
The subject matter of claim 2 in which said cam means includes a cam shaft mounted in said frame means for rotation about an axis generally parallel to the axes of said pressure rollers; and a first cam member on said cam shaft for engaging said resilient means when said cam shaft is rotated from a first position to a second position.
Claim 5
Dependent Claim
42 words
The subject matter of claim 3, including a second cam member for engaging said yoke structure and urging the same away from said drive capstan in response to rotation of said cam shaft from said second position back to said first position.
Claim 6
Dependent Claim
95 words
The subject matter of claim 4, in which said drive capstan is driven from one end leaving the other end free; a bearing on said other end, said actuating means including a lever element secured at one end to said cam shaft and extending laterally therefrom, the other end of said lever element terminating in a hook means for engaging said bearing on the other Free end of said drive capstan when said cam shaft is rotated to said second position to thereby stabilize said drive capstan while said pressure rollers are engaging the same.
References Cited (Backward Citations)
US2858130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |