US3698540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web sensing mechanism for tracking systems
Assignee: Xerox Corp
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Filing: 1970-12-02
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Granted: 1972-10-17
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Expires: 1990-12-02
Abstract
Abstract A web sensing mechanism for use with the edge of a moving web to sense its deviation from a desired predetermined path of movement. The mechanism includes a ring formed with a tapered inner edge engageable with the sensed edge of the web and which is arranged generally concentric with the axis of a roller around which the web is guided. The ring is mounted for rotation on the end of a control lever which actuates means for correcting the web deviation.
Inventors
- 👤 William E Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/754; G03G15/755; B; B65; B65G; B65G39/00; B65G39/10; B65G39/12; B65G39/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
In a web tracking system for a moving web having a roller in contact with the web to guide the same, and means for sensing deviation of an edge of the web from a predetermined position during movement thereof, the improvement comprising an actuating mechanism for producing corrective movement of the web in responsive to signals indicative of web deviation in either direction, said mechanism including a control lever pivotable in either direction and the pivoting of which in either direction produces signals for said mechanism, a circular member secured to the lever and adapted to engage the sensed edge of the web for causing said pivoting of the lever, said member including a ring element having a tapered edge engageable with the sensed edge, said member including means for permitting rotation of the ring element as the same engages the moving sensed edge.
Claim 2
Dependent Claim
144 words
In a web tracking system for a moving web having a roller in contact with the web to guide the same, and means for sensing deviation of an edge of the web from a predetermined position during movement thereof, the improvement comprising an actuating mechanism for producing corrective movement of the web in responsive to signals indicative of web deviation in either direction, said mechanism including a control lever pivotable in either direction and the pivoting of which in either direction produces signals for said mechanism, a circular member secured to the lever and adapted to engage the sensed edge of the web for causing said pivoting of the lever, said member including a ring element having a tapered edge engageable with the sensed edge, said member including means for permitting rotation of the ring element as the same engages the moving sensed edge.
Claim 3
Dependent Claim
29 words
The system in claim 1 wherein the plane of the ring element is at an acute angle relative to the plane of the sensed edge adjacent said ring element.
Claim 4
Dependent Claim
32 words
The system in claim 1 wherein said circular member also includes a bearing device having two races one of which supports the ring element and the other is mounted on said lever.
Claim 5
Dependent Claim
30 words
The system of claim 1 including means operatively associated with said circular member for stopping the movement of the web in the event the same deviates beyond a predetermined limit.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |