Patent US3707743A successfully refreshed from Google Patents.
US3707743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of continuous sheet material
Assignee: ROSS PULP & PAPER Inc
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Filing: 1971-10-21
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Granted: 1973-01-02
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Expires: 1991-10-21
Abstract
Abstract This disclosure pertains to a multi-pass web-treating apparatus particularly adapted for drying a paper web. The web is transferred between passes or zones by turning rolls. A threading device associated with the dryer utilizes turning sheaves which are associated with each turning roll over which at least one threading rope or tape travels. An attachment device is fixed to the tape to hook or unhook the end of a paper web to be threaded through the dryer.
Inventors
- 👤 P Marchal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:16
CPC Classifications
D; D21; D21G; D21G9/00; D21G9/0063; D21G9/0072; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44376; Y10T24/44385; Y10T24/44462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A clamping device particularly adapted for grasping a web tail for threading a multi-pass web treating apparatus, comprising in combination: an attachment beam, first and second rods of substantially the same length mounted parallel to said attachment beam by blade means; a pair of arms of equal length hinged on each end of said second rod, the free ends of said arms having jaws thereon; a spring attached to each arm intermediate said jaws and the hinge points so that the arms are held in an open position when the spring is located between the second rod and the beam and the jaws are held in a closed position when the spring is located between said first and second rods, said arms being of such a length that when they are closed by means of said spring, their respective jaws are closed together over said first rod.
Claim 2
Dependent Claim
147 words
A clamping device particularly adapted for grasping a web tail for threading a multi-pass web treating apparatus, comprising in combination: an attachment beam, first and second rods of substantially the same length mounted parallel to said attachment beam by blade means; a pair of arms of equal length hinged on each end of said second rod, the free ends of said arms having jaws thereon; a spring attached to each arm intermediate said jaws and the hinge points so that the arms are held in an open position when the spring is located between the second rod and the beam and the jaws are held in a closed position when the spring is located between said first and second rods, said arms being of such a length that when they are closed by means of said spring, their respective jaws are closed together over said first rod.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |