Patent US5089899A successfully refreshed from Google Patents.
Patent US3592371A successfully refreshed from Google Patents.
US3592371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band width controller
Assignee: Warner and Swasey Co
•
Filing: 1969-06-23
•
Granted: 1971-07-13
•
Expires: 1989-06-23
Abstract
Abstract A control means for the adjustment of the band width of a moving band of continuous material which passes over a plurality of tensioning bars and is subject to deviations in its width due to its inherent properties in such an environment, comprises at least one bar presenting a curved surface to one face of the continuously moving band, said surface, upon engaging said face, causing said band to spread or become narrower in accordance with the disposition of said curved surface. The bar is actuated by an amplifier-controller and servomotor which is constantly error sensitive in that error-measuring means are provided downstream being in engagement with said band to measure the error and effect the input signal to the amplifier-controller. In alternate embodiments a plurality of curved surfaces are presented to one or more faces of said band, said surfaces being movable by means which are controlled either independently or commonly.
Inventors
- 👤 William Kirk Wyatt
- 👤 John R Brownell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:11
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/02; B65H23/032; B65H23/035; G; G05; G05D; G05D5/00; G05D5/04; G05D5/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
In an apparatus handling a moving band of continuous material passing over a plurality of bars, the improvement comprising: a. a frame pivotally mounted in said apparatus; b. a plurality of bars extending from said frame to pivot therewith, said bars comprising at least one bar having a convex curve with respect to a face of said moving band, at least one bar having a concave curve with respect to a face of said moving band aNd at least one substantially straight bar disposed between said convex and concave bars in the path of travel of said band; c. means engaging said frame for pivoting said frame and bringing the curved portion of at least one of said curved bars into contact with said band; and d. sensor means for monitoring the width of said band and controlling said last mentioned means.
Claim 2
Dependent Claim
142 words
In an apparatus handling a moving band of continuous material passing over a plurality of bars, the improvement comprising: a. a frame pivotally mounted in said apparatus; b. a plurality of bars extending from said frame to pivot therewith, said bars comprising at least one bar having a convex curve with respect to a face of said moving band, at least one bar having a concave curve with respect to a face of said moving band aNd at least one substantially straight bar disposed between said convex and concave bars in the path of travel of said band; c. means engaging said frame for pivoting said frame and bringing the curved portion of at least one of said curved bars into contact with said band; and d. sensor means for monitoring the width of said band and controlling said last mentioned means.
Claim 3
Dependent Claim
64 words
The invention of claim 1 wherein said sensor means comprises at least one member engaging and overlying the edge of said band and being movably mounted in said apparatus; means for holding said member against said edge so that said member follows the movements thereof, and means engaging said member and responsive to the movements thereof for controlling said means for pivoting said frame.
Claim 4
Dependent Claim
51 words
The invention of claim 1 wherein at least one curved bar and said substantially straight bar are maintained in continuous contact with said band, and said means engaging said frame is responsive to said sensor means for bringing the curved portion of said other curved bar into contact with said band.
Claim 5
Dependent Claim
17 words
The invention of claim 3 wherein said concave bar is maintained in continuous contact with said band.
Claim 6
Dependent Claim
22 words
The invention of claim 1 wherein said convex and concave bars are on opposite sides of the pivot point of the frame.
Claim 7
Dependent Claim
25 words
The invention of claim 1 wherein the ends of at least some of said bars remote from said frame are fixedly connected to one another.
References Cited (Backward Citations)
US3171579A
Cited
US3305896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |