US4013204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adjusting web-handling device
Assignee: Agfa Gevaert NV
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Filing: 1975-06-30
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Granted: 1977-03-22
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Expires: 1995-06-30
Abstract
Abstract A self-adjusting tension-balancing roller for maintaining a substantially uniform distribution of tension across a continuously moving web, which does not cause lateral deviations of the web path while it is adjusting.
Inventors
- 👤 Albert Joseph Hellemans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
D; D21; D21H; D21H23/00; B; B65; B65H; B65H23/00; B65H23/02; D21H5/00; D21H5/0005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
A self-adjusting web-handling device for providing even tension across a continuously moving web which is conveyed by guide means to come into engagement with said handling device along an upstream approach plane and to leave said device along a downstream exit plane at a defined included angle to said approach plane, said device comprising: a roller mounted for free rotation and engagement by said web, frame means for supporting the bearings of said roller, pivot means supporting said frame means for free pivotal movement about an axis that is situated halfway the length of the roller, that is normal to the bisector of said included angle, and that coincides with the tangent to the roller periphery at the side of the roller where the web is in engagement with the roller.
Claim 2
Dependent Claim
131 words
A self-adjusting web-handling device for providing even tension across a continuously moving web which is conveyed by guide means to come into engagement with said handling device along an upstream approach plane and to leave said device along a downstream exit plane at a defined included angle to said approach plane, said device comprising: a roller mounted for free rotation and engagement by said web, frame means for supporting the bearings of said roller, pivot means supporting said frame means for free pivotal movement about an axis that is situated halfway the length of the roller, that is normal to the bisector of said included angle, and that coincides with the tangent to the roller periphery at the side of the roller where the web is in engagement with the roller.
Claim 3
Dependent Claim
38 words
A web-handling device according to claim 1, in which said web guiding means includes a web supporting roller at a web-treatment station upstream of said web handling device and a web guiding roller downstream of said web-handling device.
Claim 4
Dependent Claim
35 words
A web-handling device according to claim 2, wherein the length of the web path between said web-supporting roller and said web-handling device is smaller than the distance between said device and said web guiding roller.
Claim 5
Dependent Claim
15 words
A web-handling device according to claim 2, wherein said web-treatment station is a coating station.
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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |