US3630463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web-tension control apparatus
Assignee: Faustel Inc
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Filing: 1969-09-22
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Granted: 1971-12-28
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Expires: 1989-09-22
Abstract
Abstract A web-tension control apparatus for maintaining tension in a web being unwound from a roll in an unwind stand. The stand has a brake for retarding rotation of the roll and a sensory means, such as a dancer roll, for sensing the tension of the web being unwound. The apparatus includes control means for generating an operating signal level and a signal means operable by the sensory means for altering the operating signal level to establish a range of tension regulating signals for application to the brake. The operating signal level provided by the control means may also be altered, responsive to the sensory means to change the range of the tension-regulating signals.
Inventors
- 👤 Victor J Mistele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:37
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/06; B65H23/063; B65H23/044
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
146 words
Apparatus for maintaining tension in a web being unwound from a roll, said roll having a signal responsive brake means for retarding the rotation of the roll to regulate the tension of the unwound web and said unwound web having a shiftably mounted sensory means responsive to the tension of said web, said apparatus comprising: shiftable fluid valve control means connected with a source of fluid pressure and engageable by said sensory means for geneRating an operating signal level; and self-regulating signal means mechanically coupled to said sensory means and in fluid communication with said control means for altering said operating signal level responsive to the sensory means to establish a range of self-regulating webtension signals and for providing a web-tension-regulating signal within said range to said brake means, said control means including means for changing said operating signal level and said range of web-tension-regulating signals.
Claim 2
Dependent Claim
146 words
Apparatus for maintaining tension in a web being unwound from a roll, said roll having a signal responsive brake means for retarding the rotation of the roll to regulate the tension of the unwound web and said unwound web having a shiftably mounted sensory means responsive to the tension of said web, said apparatus comprising: shiftable fluid valve control means connected with a source of fluid pressure and engageable by said sensory means for geneRating an operating signal level; and self-regulating signal means mechanically coupled to said sensory means and in fluid communication with said control means for altering said operating signal level responsive to the sensory means to establish a range of self-regulating webtension signals and for providing a web-tension-regulating signal within said range to said brake means, said control means including means for changing said operating signal level and said range of web-tension-regulating signals.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 wherein said means for changing said operating signal level is coupled to said sensory means and is responsive to web-tension conditions outside those regulatable by said range of web-tension-regulating signals.
Claim 4
Dependent Claim
59 words
The apparatus of claim 1 wherein said brake means is responsive to pneumatic pressure signals, wherein control means generates a pneumatic pressure level within said apparatus, and wherein said signal means is responsive to said sensory means to establish a range of web-tension-regulating pneumatic signals and for providing a web-tension-regulating pneumatic signal within said range to said brake means.
Claim 5
Dependent Claim
79 words
The apparatus of claim 3 wherein said control means includes a pair of valves connected in series between a source of pneumatic pressure and a discharge and wherein said signal means is interposed between said valves, said valves being operable by said sensory means for generating a pneumatic pressure level within said signal means by admitting and discharging pneumatic pressure to and from said signal means responsive to web-tension conditions outside those regulatable by said range of web-tension-regulating signals.
Claim 6
Dependent Claim
24 words
The apparatus of claim 4 including means connected in series with said valves for throttling the variation in pneumatic pressure in said signal means.
Claim 7
Dependent Claim
26 words
The apparatus of claim 3 wherein said signal means comprises an air cylinder operable by said sensory means for establishing a range of web-tension-regulating pneumatic signals.
Claim 8
Dependent Claim
26 words
The apparatus of claim 4 wherein said signal means comprises an air cylinder operable by said sensory means for establishing a range of web-tension-regulating pneumatic signals.
Claim 9
Dependent Claim
76 words
The apparatus of claim 7 wherein the sensory means is cooperable with the unwound portion of the web and movable within defined limits in accordance with the tension thereof, said air cylinder being operable by said sensory means when within said limits for establishing a range of web-tension-regulating pneumatic signals, said valves being operable by said sensory means when the latter is at said limits for generating a pneumatic signal pressure level within said signal means.
Claim 10
Dependent Claim
15 words
The apparatus of claim 8 including means for damping the movement of said sensory means.
Claim 11
Dependent Claim
58 words
The apparatus of claim 6 wherein said air cylinder has a housing connected to and said control means and pressurized to the pneumatic pressure level and further has a piston mounted in said housing for varying the volume thereof to establish a range of web-tension-regulating pneumatic signals, said piston being movable in said housing by said sensory means.
Claim 12
Dependent Claim
36 words
The apparatus of claim 10 wherein said sensory means includes a cam means rotatable in accordance with the tension of the web, said air cylinder piston being coactable with said cam for movement within said housing.
Claim 13
Dependent Claim
57 words
The apparatus of claim 8 wherein said air cylinder has a housing connected to said control means and pressurized to the pneumatic pressure level and further has a piston mounted in said housing for varying the volume thereof to establish a range of web-tension-regulating pneumatic signals, said piston being movable in said housing by said sensory means.
Claim 14
Dependent Claim
36 words
The apparatus of claim 12 wherein said sensory means includes a cam means rotatable in accordance with the tension of the web, said air cylinder piston being coactable with said cam for movement within said housing.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |