US3602125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film-processing tank
Assignee: United States Department of the Army
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Filing: 1969-06-03
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Granted: 1971-08-31
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Expires: 1989-06-03
Abstract
Abstract A tank for processing filmlike material that is transported through discrete sections of the tank in looped configuration. Each tank section is provided with a discrete weighted roller, that differs in weight or buoyancy from the other rollers, and each of which ride in guide rails to carry the material into the tank sections. The material is confined by the rollers in its passage through the several sections.
Inventors
- 👤 Seymour L Hersh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:11
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/08; G03D3/13; G03D3/135
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A system for processing a continuous strip material including a tank having a plurality of discrete compartments, each having an appropriate treating agent therein, feed and takeup means for said material positioned respectively at opposite ends of said tank, a plurality of fixed rollers adjacent to the upper edge of said tank for guiding said material in its travel, a plurality of movable rollers positioned above said tank adapted to descend freely, individually and successively into each of said compartments as each of said rollers engage slack film released from said feed means to form a U-shaped loop of said film within the several compartments, means for retaining said movable rollers adjacent to the bottom of each compartment, said retaining means for each of said movable rollers comprising a pair of opposing pivotable locking arms adapted to substantially engirdle the respective roller, and each of said movable rollers being of successive decreasing weight in the order from the feed means to the takeup means.
Claim 2
Independent Claim
164 words
A system for processing a continuous strip material including a tank having a plurality of discrete compartments, each having an appropriate treating agent therein, feed and takeup means for said material positioned respectively at opposite ends of said tank, a plurality of fixed rollers adjacent to the upper edge of said tank for guiding said material in its travel, a plurality of movable rollers positioned above said tank adapted to descend freely, individually and successively into each of said compartments as each of said rollers engage slack film released from said feed means to form a U-shaped loop of said film within the several compartments, means for retaining said movable rollers adjacent to the bottom of each compartment, said retaining means for each of said movable rollers comprising a pair of opposing pivotable locking arms adapted to substantially engirdle the respective roller, and each of said movable rollers being of successive decreasing weight in the order from the feed means to the takeup means.
Claim 3
Dependent Claim
289 words
A tank assembly for processing continuous strip film comprising; an open-top tank having several parallel vertical partitions that divide the tank into hydraulically separate compartments, independently lockable and indepeNdently drivable film feed and takeup means positioned outside of and at opposite ends of said tank such that the compartments are in succession between the feed and takeup means, a fixed guide roller positioned in the tank at each end thereof and projecting above the respective end walls of the tank to guide film from the feed means into the tank and from the tank to the takeup means, a fixed guide roller positioned in the tank above each partition, opposing guide rails in each compartment along the sides of the tank, a movable guide roller for each compartment, each including an axially extending shaft for registration with the opposing guide rails, the guide rollers for the successive compartments from the feed means end of the tank to the takeup means end of the tank being of progressively less weight, releasable guide-roller-retaining means adjacent the bottom end of at least one of the opposing guide rails in each compartment for engaging the respective guide roller shaft, whereby when the movable guide rollers are temporarily fixed in positions higher than the fixed guide rollers, film may be stretched from the feed means to the takeup means between the movable guide rollers and the fixed guide rollers, the feed and takeup means fixed, the movable rollers released to rest upon the film and then the feed means released and driven until the movable guide rollers move downward to their respective retaining means in succession, at which time driving of the feed means may be terminated and driving of the takeup means begun.
Claim 4
Dependent Claim
289 words
A tank assembly for processing continuous strip film comprising; an open-top tank having several parallel vertical partitions that divide the tank into hydraulically separate compartments, independently lockable and indepeNdently drivable film feed and takeup means positioned outside of and at opposite ends of said tank such that the compartments are in succession between the feed and takeup means, a fixed guide roller positioned in the tank at each end thereof and projecting above the respective end walls of the tank to guide film from the feed means into the tank and from the tank to the takeup means, a fixed guide roller positioned in the tank above each partition, opposing guide rails in each compartment along the sides of the tank, a movable guide roller for each compartment, each including an axially extending shaft for registration with the opposing guide rails, the guide rollers for the successive compartments from the feed means end of the tank to the takeup means end of the tank being of progressively less weight, releasable guide-roller-retaining means adjacent the bottom end of at least one of the opposing guide rails in each compartment for engaging the respective guide roller shaft, whereby when the movable guide rollers are temporarily fixed in positions higher than the fixed guide rollers, film may be stretched from the feed means to the takeup means between the movable guide rollers and the fixed guide rollers, the feed and takeup means fixed, the movable rollers released to rest upon the film and then the feed means released and driven until the movable guide rollers move downward to their respective retaining means in succession, at which time driving of the feed means may be terminated and driving of the takeup means begun.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |