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US3709418A
Expired / Lapsed
US
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Web alignment device
Assignee: LEE H CO Inc
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Filing: 1971-03-26
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Granted: 1973-01-09
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Expires: 1991-03-26
Abstract
Abstract A device for maintaining alignment of an edge of a web in substantially parallelism with a predetermined path along which the web is moved. The device includes a pair of guide wheels which are positioned and biased so as to engage the web in a nip between the peripheries of the wheels. A fluid stream is provided adjacent the nip, and means are provided for generating a signal accordingly as the stream is obstructed or not by stream. A motor is provided, responsive to the signal for effecting pivotal movement of the axle of one of the wheels relative to the other of the wheels, so as to tend to maintain the desired parallelism.
Inventors
- 👤 R Bode
- 👤 W Sylvester
- 👤 I Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:58
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/02; B65H23/032; B65H23/038; B65H23/0204; B65H23/0212
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
In a system for moving a web along a predetermined path, a device for maintaining alignment of an edge of said web in substantially parallelism to said path and comprising in combination: a pair of rotatable guide wheels lying in respective intersecting, non-coplanar planes; axle means for rotatably mounting said guide wheels; said wheels being positioned so as to engage said web between a nip formed by the peripheries of said wheels; means for sensing the position of said edge with respect to said nip and for providing a signal corresponding to the sensed position of said edge; and means responsive to said signal for effecting pivotal movement of only one of said wheels about an axis normal to the axis of its axle mEans, so as to alter the direction with respect to said planes of a line commonly tangent to both the wheel peripheries at said nip, to a direction tending to restore the parallelism of said edge and said path.
Claim 2
Dependent Claim
163 words
In a system for moving a web along a predetermined path, a device for maintaining alignment of an edge of said web in substantially parallelism to said path and comprising in combination: a pair of rotatable guide wheels lying in respective intersecting, non-coplanar planes; axle means for rotatably mounting said guide wheels; said wheels being positioned so as to engage said web between a nip formed by the peripheries of said wheels; means for sensing the position of said edge with respect to said nip and for providing a signal corresponding to the sensed position of said edge; and means responsive to said signal for effecting pivotal movement of only one of said wheels about an axis normal to the axis of its axle mEans, so as to alter the direction with respect to said planes of a line commonly tangent to both the wheel peripheries at said nip, to a direction tending to restore the parallelism of said edge and said path.
Claim 3
Dependent Claim
21 words
In a system as set forth in claim 1 wherein said guide wheels lie in planes mutually orthogonal to one another.
Claim 4
Dependent Claim
31 words
In a system as set forth in claim 1 further including means for resiliently biasing the periphery of one of said wheels toward contact with the periphery of said other wheel.
Claim 5
Dependent Claim
35 words
In a system as set forth in claim 1 wherein said sensing means includes means for providing at least one continuous fluid stream and means for sensing interruptions in said fluid stream by said web.
Claim 6
Dependent Claim
51 words
In a system as set forth in claim 1 wherein said means for effecting pivotal movement includes a fluid-operated cylinder having a piston which is coupled to the axle means mounting said one of said wheels, and also includes means responsive to said sensing means for effecting movement of said piston.
Claim 7
Dependent Claim
49 words
In a system as set forth in claim 4 wherein said signal providing means includes means for providing a pair of continuous fluid flow streams each located a different distance from said nip; and said sensing means includes means for sensing interruptions by said web of said fluid streams.
Claim 8
Dependent Claim
63 words
In a system as set forth in claim 6 wherein said means for effecting pivotal movement includes a fluid-operated cylinder having a piston which is coupled to the axle means mounting said one of said wheels, and valve means responsive to said fluid streams for permitting fluid to be introduced selectively to either side of said piston to effect movement of the latter.
Claim 9
Dependent Claim
17 words
In a system as set forth in claim 1 wherein said guide wheels lie in intersecting planes.
Claim 10
Dependent Claim
42 words
In a system as set forth in claim 8 wherein one of said wheels is so mounted that said pivotal movement changes the spatial position of said nip without changing the angular relationship between the planes or the spacing of said nip.
Claim 11
Dependent Claim
21 words
In a system as set forth in claim 1 wherein said guide wheels lie in planes mutually orthogonal to one another.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |