Patent US4099194A successfully refreshed from Google Patents.
US4099194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the wet processing of photosensitive materials
Assignee: Durst Group AG
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Filing: 1976-11-16
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Granted: 1978-07-04
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Expires: 1996-11-16
Abstract
Abstract A closed container for wet processing photographic strip or sheet materials such as film or printing paper has a cover piece which rests upon several of the conveying rollers. The cover piece has indentations in its lower surface which correspond to the outer surfaces of the rollers to smoothly engage them with intermediate portions of the cover piece being submerged in the processing liquid. This minimizes the contact of the air in the container with the wet surfaces of the rollers partially submerged in the liquid and inbetween them, which thus minimizes oxidation of the processing baths.
Inventors
- 👤 Klaus Kummerl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:54
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/08; G03D3/13; G03D3/132
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
A device for the wet processing of photosensitive flexible strip or sheet material comprising a container for processing liquid, conveying rollers disposed in the container for conducting the strip or sheet material through the container and the liquid therein, at least some of the conveying rollers being partially disposed in the liquid, characterized in that a cover piece having indentations in a lower surface is disposed in direct contact over at least a portion of the conveying rollers which are partially immersed in the liquid, the indentations in the cover piece corresponding to the surfaces of the conveying rollers with which it is disposed in contact wherein such surfaces of the conveying rollers are smoothly covered from contact with the air in the container, and at least a portion of the cover piece is constructed and arranged to be disposed below the level of the liquid in the container, whereby the liquid is shielded from oxidation from the air, and splashing out of the liquid is prevented.
Claim 2
Independent Claim
167 words
A device for the wet processing of photosensitive flexible strip or sheet material comprising a container for processing liquid, conveying rollers disposed in the container for conducting the strip or sheet material through the container and the liquid therein, at least some of the conveying rollers being partially disposed in the liquid, characterized in that a cover piece having indentations in a lower surface is disposed in direct contact over at least a portion of the conveying rollers which are partially immersed in the liquid, the indentations in the cover piece corresponding to the surfaces of the conveying rollers with which it is disposed in contact wherein such surfaces of the conveying rollers are smoothly covered from contact with the air in the container, and at least a portion of the cover piece is constructed and arranged to be disposed below the level of the liquid in the container, whereby the liquid is shielded from oxidation from the air, and splashing out of the liquid is prevented.
Claim 3
Dependent Claim
39 words
A device as set forth in claim 1 wherein the portion of the cover piece disposed below the liquid level is constructed and arranged to guide the travel of the strip or sheet material and thus to constitute guides.
Claim 4
Dependent Claim
19 words
A device as set forth in claim 2 wherein the guides are constructed and arranged to include longitudinal ribs.
Claim 5
Dependent Claim
24 words
A device as set forth in claim 1 wherein the cover piece has a substantially concave upper surface and a generally convex lower surface.
Claim 6
Dependent Claim
27 words
A device as set forth in claim 1 wherein a handle is provided on the cover piece to facilitate its insertion into and removal from the container.
Claim 7
Dependent Claim
24 words
A device as set forth in claim 1 wherein the cover piece rests in direct contact with and is supported by the conveying rollers.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |