Patent US3720827A successfully refreshed from Google Patents.
US4077834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the control of the tension of an endless belt or screen
Assignee: Individual
•
Filing: 1976-09-07
•
Granted: 1978-03-07
•
Expires: 1996-09-07
Abstract
Abstract The invention relates to a device for the control of the tension of an endless belt or screen in paper handling machinery by providing a deflecting roller displaceable by two bearings guided in carriages.
Inventors
- 👤 Theo Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:37
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/005; D21F1/00; D21F1/36; D21F1/365
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
184 words
Apparatus for controlling both the tension and edge run position of an endless belt or screen in a paper handling machine, comprising a unitary deflecting roller, first and second bearing means at the opposite ends of said roller, said bearing means rotatably supporting said roller, each said bearing means being movably mounted in a slide member, first and second motor means operatively associated with said first and second bearing means, respectively, for individually displacing its associated bearing relative to a said slide, first electronic monitoring control means operatively connected to said first and second motors and responsive to the tension in said belt or screen for activating said motors to shift said bearings in said slides and thereby achieve a desired tension in said belt or screen, and second electronic monitoring control means responsive to the positions of the edges of said belt or screen for activating said motors to shift said bearings in said slides to achieve a desired edge position of said belt or screen, whereby both the position and tension of said belt or screen are controlled by said deflecting roller.
Claim 2
Dependent Claim
184 words
Apparatus for controlling both the tension and edge run position of an endless belt or screen in a paper handling machine, comprising a unitary deflecting roller, first and second bearing means at the opposite ends of said roller, said bearing means rotatably supporting said roller, each said bearing means being movably mounted in a slide member, first and second motor means operatively associated with said first and second bearing means, respectively, for individually displacing its associated bearing relative to a said slide, first electronic monitoring control means operatively connected to said first and second motors and responsive to the tension in said belt or screen for activating said motors to shift said bearings in said slides and thereby achieve a desired tension in said belt or screen, and second electronic monitoring control means responsive to the positions of the edges of said belt or screen for activating said motors to shift said bearings in said slides to achieve a desired edge position of said belt or screen, whereby both the position and tension of said belt or screen are controlled by said deflecting roller.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1, characterized in that at least one said electronic monitoring control means contains a motor-actuated set-point transmitter.
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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |