US3720385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant tension winding apparatus
Assignee: General Binding Corp
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Filing: 1970-11-09
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Granted: 1973-03-13
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Expires: 1990-11-09
Abstract
Abstract A simple, inexpensive, all-mechanical apparatus which provides a varying force relationship on a roll means that automatically and exactly compensates for the depletion or increase of the material wound on a roll comprises a web roll means, a web tensioning means for applying tension to the web, and a sensing means coupled with the web tensioning means on a movable follower arm means. The web tensioning means includes a brake disc and a brake means contacting the disc and applying a braking force to the disc at a point generally along a radius thereof as determined by the movement of the sensing means in contact with the outer peripheral surface of the roll. The follower arm means is generally tangentially oriented with respect to the roll and is arranged so the brake friction moves the sensing means against the roll outer surface. In the embodiments shown the brake means and sensing means may be on the same or opposite ends of the follower arm means.
Inventors
- 👤 H Staats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:50
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
282 words
An apparatus for maintaining constant tension in a moving web comprising a web roll means having a roll varying in diameter, said roll having an outer peripheral surface, a web tensioning means for applying tension to said web, a sensing means contacting on said outer peripheral surface to move responsive to the variation in diameter of said roll, said sensing means being coupled with said web tensioning means to move said web tensioning means with said variation in size of said roll to thereby maintain the tension applied to said web constant despite the variation in the size of said roll, said tensioning means include a brake disc having a radius, said disc rotating in direct relation to the rotation of said roll, a brake means contacting said disc and applying a braking force to said disc at a point generally along a radius thereof, said sensing means contacting said outer peripheral surface of said roll and thereby moving said brake means along said radius of said disc in direct relation to the variation in diameter of said roll whereby a constant tension is imparted to said web, a follower arm means generally tangentially oriented with respect to said roll, said follower arm means being pivotally connected to a support at a first pivot point, said sensing means and said brake means being affixed to said follower arm and spaced from said first point, and said point of contact of said brake means with said disc is beyond, in the direction of rotation of said disc, the point of tangency between a circle of a diameter of the effective disc diameter and a tangential line passing through said follower arm pivot point.
Claim 2
Independent Claim
282 words
An apparatus for maintaining constant tension in a moving web comprising a web roll means having a roll varying in diameter, said roll having an outer peripheral surface, a web tensioning means for applying tension to said web, a sensing means contacting on said outer peripheral surface to move responsive to the variation in diameter of said roll, said sensing means being coupled with said web tensioning means to move said web tensioning means with said variation in size of said roll to thereby maintain the tension applied to said web constant despite the variation in the size of said roll, said tensioning means include a brake disc having a radius, said disc rotating in direct relation to the rotation of said roll, a brake means contacting said disc and applying a braking force to said disc at a point generally along a radius thereof, said sensing means contacting said outer peripheral surface of said roll and thereby moving said brake means along said radius of said disc in direct relation to the variation in diameter of said roll whereby a constant tension is imparted to said web, a follower arm means generally tangentially oriented with respect to said roll, said follower arm means being pivotally connected to a support at a first pivot point, said sensing means and said brake means being affixed to said follower arm and spaced from said first point, and said point of contact of said brake means with said disc is beyond, in the direction of rotation of said disc, the point of tangency between a circle of a diameter of the effective disc diameter and a tangential line passing through said follower arm pivot point.
Claim 3
Independent Claim
282 words
An apparatus for maintaining constant tension in a moving web comprising a web roll means having a roll varying in diameter, said roll having an outer peripheral surface, a web tensioning means for applying tension to said web, a sensing means contacting on said outer peripheral surface to move responsive to the variation in diameter of said roll, said sensing means being coupled with said web tensioning means to move said web tensioning means with said variation in size of said roll to thereby maintain the tension applied to said web constant despite the variation in the size of said roll, said tensioning means include a brake disc having a radius, said disc rotating in direct relation to the rotation of said roll, a brake means contacting said disc and applying a braking force to said disc at a point generally along a radius thereof, said sensing means contacting said outer peripheral surface of said roll and thereby moving said brake means along said radius of said disc in direct relation to the variation in diameter of said roll whereby a constant tension is imparted to said web, a follower arm means generally tangentially oriented with respect to said roll, said follower arm means being pivotally connected to a support at a first pivot point, said sensing means and said brake means being affixed to said follower arm and spaced from said first point, and said point of contact of said brake means with said disc is beyond, in the direction of rotation of said disc, the point of tangency between a circle of a diameter of the effective disc diameter and a tangential line passing through said follower arm pivot point.
Claim 4
Independent Claim
282 words
An apparatus for maintaining constant tension in a moving web comprising a web roll means having a roll varying in diameter, said roll having an outer peripheral surface, a web tensioning means for applying tension to said web, a sensing means contacting on said outer peripheral surface to move responsive to the variation in diameter of said roll, said sensing means being coupled with said web tensioning means to move said web tensioning means with said variation in size of said roll to thereby maintain the tension applied to said web constant despite the variation in the size of said roll, said tensioning means include a brake disc having a radius, said disc rotating in direct relation to the rotation of said roll, a brake means contacting said disc and applying a braking force to said disc at a point generally along a radius thereof, said sensing means contacting said outer peripheral surface of said roll and thereby moving said brake means along said radius of said disc in direct relation to the variation in diameter of said roll whereby a constant tension is imparted to said web, a follower arm means generally tangentially oriented with respect to said roll, said follower arm means being pivotally connected to a support at a first pivot point, said sensing means and said brake means being affixed to said follower arm and spaced from said first point, and said point of contact of said brake means with said disc is beyond, in the direction of rotation of said disc, the point of tangency between a circle of a diameter of the effective disc diameter and a tangential line passing through said follower arm pivot point.
Claim 5
Independent Claim
156 words
An apparatus for maintaining constant tension in a moving web comprising a web roll means having a roll varying in diameter, said roll having an outer peripheral surface, a web tensioning means for applying tension to said web, a sensing means contacting on said outer peripheral surface to move responsive to the variation in diameter of said roll, said sensing means being coupled with said web tensioning means to move said web tensioning means with said variation in size of said roll to thereby maintain the tension applied to said web constant despite the variation in the size of said roll, said web tensioning means and said sensing means each including an arm, said arms each having a universal joint at a respective first point thereon, said universal joints mounting each of said respective arms at a fixed point, and a biasing means urging said arms to pivot about their respective first points towards each other.
Claim 6
Independent Claim
156 words
An apparatus for maintaining constant tension in a moving web comprising a web roll means having a roll varying in diameter, said roll having an outer peripheral surface, a web tensioning means for applying tension to said web, a sensing means contacting on said outer peripheral surface to move responsive to the variation in diameter of said roll, said sensing means being coupled with said web tensioning means to move said web tensioning means with said variation in size of said roll to thereby maintain the tension applied to said web constant despite the variation in the size of said roll, said web tensioning means and said sensing means each including an arm, said arms each having a universal joint at a respective first point thereon, said universal joints mounting each of said respective arms at a fixed point, and a biasing means urging said arms to pivot about their respective first points towards each other.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |