US3905533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for regulating tension in sheet material
Assignee: Societe dEtudes de Machines Speciales SA
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Filing: 1974-01-09
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Granted: 1975-09-16
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Expires: 1994-01-09
Abstract
Abstract Tension in sheet material leaving a pair of cylinders of a machine, particularly a rotogravure machine, is regulated by varying the speed of one of the cylinders according to the changes in position of a jockey roller tensioning the sheet.
Inventors
- 👤 Louis Corse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:07
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/188; B65H23/1888; B65H23/16; B65H2511/00; B65H2511/10; B65H2511/11; B65H2511/112
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
In a printing system; means for imprinting an elongate sheet and for delivering the imprinted, elongate sheet, comprising a rigid engraved plate cylinder having power means for rotating it at a first speed and a flexible impression cylinder having power means for rotating it at a second speed correlated with said first speed, said cylinders having parallel axes; pressure means for pressing one of the cylinders against the sheet and thereby against the other cylinder; means for maintaining a loop in the delivered sheet; jockey roll means biased for engaging the loop to maintain tension therein and to respond to variations in said tension by movements of the jockey roll means to different positions to compensate said variations in tension; and control means controlled by the jockey roll means for responding to the movements thereof and for thereby controlling one of the power means to vary one of said speeds relative to the other speed so as to compensate said movements of the jockey roll means; thereby enabling regulation of said tension independently of said pressure means.
Claim 2
Dependent Claim
177 words
In a printing system; means for imprinting an elongate sheet and for delivering the imprinted, elongate sheet, comprising a rigid engraved plate cylinder having power means for rotating it at a first speed and a flexible impression cylinder having power means for rotating it at a second speed correlated with said first speed, said cylinders having parallel axes; pressure means for pressing one of the cylinders against the sheet and thereby against the other cylinder; means for maintaining a loop in the delivered sheet; jockey roll means biased for engaging the loop to maintain tension therein and to respond to variations in said tension by movements of the jockey roll means to different positions to compensate said variations in tension; and control means controlled by the jockey roll means for responding to the movements thereof and for thereby controlling one of the power means to vary one of said speeds relative to the other speed so as to compensate said movements of the jockey roll means; thereby enabling regulation of said tension independently of said pressure means.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |