US3650490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled tension web winding apparatus
Assignee: Egan Machinery Co
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Filing: 1970-05-07
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Granted: 1972-03-21
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Expires: 1990-05-07
Abstract
Abstract Web winding apparatus in which a web of flexible material is adapted to successively pass over a first idler roll, under a dancer roll, over a second idler roll, over a lay-on roll and then be wound on a wind-up roll. The dancer roll is movable bodily through the medium of a first pair of arms which are pivotal about a first axis and the lay-on roll is movable bodily through the medium of a second pair of arms which are pivotal about a second axis. A mechanism, including a cam and a variable fluid pressure system, is connected to both pairs of arms and is so constructed and arranged as to effect application of programmed tension to the web by the dancer roll in response to bodily movement of the lay-on roll about the second axis during winding of the web on the wind-up roll.
Inventors
- 👤 Alan J Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:14
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
Web winding apparatus comprising a support, a dancer roll, a lay-on roll, a wind-up roll, a drive for imparting rotation to the wind-up roll, said rolls being carried by the support, spaced apart and rotatable about corresponding parallel axes, a web of a flexible material being adapted to successively engage the dancer roll and the lay-on roll and then engage and be wound on the wind-up roll, first means connecting the dancer roll to the support and permitting bodily movement of the dancer roll while maintaining its axis parallel to the axes of the other rolls, second means connecting the lay-on roll to the support and permitting bodily movement of the lay-on roll relative to the wind-up roll while maintaining its axis parallel to the axes of the other rolls, and a mechanism connected to and coacting with the first and second means for effecting programmed tension in the web during winding thereof on the wind-up roll, said mechanism comprising variable fluid pressure third means for applying corresponding force to the dancer roll through the first means.
Claim 2
Dependent Claim
177 words
Web winding apparatus comprising a support, a dancer roll, a lay-on roll, a wind-up roll, a drive for imparting rotation to the wind-up roll, said rolls being carried by the support, spaced apart and rotatable about corresponding parallel axes, a web of a flexible material being adapted to successively engage the dancer roll and the lay-on roll and then engage and be wound on the wind-up roll, first means connecting the dancer roll to the support and permitting bodily movement of the dancer roll while maintaining its axis parallel to the axes of the other rolls, second means connecting the lay-on roll to the support and permitting bodily movement of the lay-on roll relative to the wind-up roll while maintaining its axis parallel to the axes of the other rolls, and a mechanism connected to and coacting with the first and second means for effecting programmed tension in the web during winding thereof on the wind-up roll, said mechanism comprising variable fluid pressure third means for applying corresponding force to the dancer roll through the first means.
Claim 3
Dependent Claim
30 words
Web winding apparatus according to claim 1 additionally comprising camming fourth means for controlling the force applied by the third means in response to bodily movement of the lay-on roll.
Claim 4
Dependent Claim
53 words
Web winding apparatus according to claim 1 wherein the third means comprises a cylinder for receiving fluid under pressure and a plunger extending through an end of the cylinder and connected to the first means, said plunger being slidable relative to the cylinder in response to variations in the pressure of the fluid.
Claim 5
Dependent Claim
88 words
Web winding apparatus according to claim 2 wherein the fourth means comprises a first lever connected to and movable with the second means about a first pivotal axis, a cam carried by the lever, a pressure regulating valve having an inlet for connection to a source of high pressure fluid and an outlet communicating with the third means, said valve including a stem that is operatively associated with the cam for controlling the pressure of the fluid discharged from the valve in response to movement of the cam.
Claim 6
Dependent Claim
131 words
Web winding apparatus according to claim 2 wherein the third means comprises a cylinder for receiving fluid under pressure and a plunger extending through an end of the cylinder and connected to the first means, said plunger being slidable relative to the cylinder in response to variations in the pressure of the fluid, and wherein the fourth means comprises a first lever connected to and movable with the second means, a cam carried by the lever, a pressure regulating valve having an inlet for connection to a source of high pressure fluid and an outlet communicating with the cylinder, said valve including a reciprocable stem device that is operatively associated with the cam for coNtrolling the pressure of the fluid discharged from the valve in response to movement of the cam.
Claim 7
Dependent Claim
44 words
Web winding apparatus according to claim 5 wherein the cam is connected and movable relative to the first lever about a second pivotal axis, means being provided to adjust the position of the cam relative to the first lever about said second pivotal axis.
Claim 8
Dependent Claim
57 words
Web winding apparatus according to claim 6 wherein the fourth means also comprises a second lever connected to and movable relative to the support about a third pivotal axis, said pressure regulating valve being mounted on the second lever, and means for adjusting the position of the lever relative to the support about said third pivotal axis.
Claim 9
Dependent Claim
50 words
Web winding apparatus according to claim 7 wherein the first and second axes intersect a substantially rectilinear line that is coincident with the longitudinal axis of the valve stem device when the parts are in such a relative position that the lay-on roll is disposed directly against the wind-up roll.
Claim 10
Dependent Claim
36 words
Web winding apparatus according to claim 8 wherein a straight line passing through the third axis and the region of engagement between the cam and the valve stem device is substantially normal to said rectilinear line.
Claim 11
Dependent Claim
36 words
Web winding apparatus according to claim 9 wherein the valve stem device includes a roller rotatable about a fourth axis that is parallel to and closely adjacent said second pivotal axis, said roller engaging the cam.
Claim 12
Dependent Claim
39 words
Web winding apparatus according to claim 10 wherein said first, second and fourth axes intersect a substantially rectilinear line when the parts are in such a relative position that the lay-on roll is disposed directly against the wind-up roll.
Claim 13
Dependent Claim
34 words
Web winding apparatus according to claim 11 wherein a straight line passing through said third pivotal axis and region of engagement between the cam and the roller is substantially normal to said rectilinear line.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |