US4310620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing a photographic material using a processing liquid
Assignee: Agfa Gevaert AG
•
Filing: 1979-03-07
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Granted: 1982-01-12
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Expires: 1999-03-07
Abstract
Abstract A photographic material is processed with a processing liquid by establishing a surface contact between the uppermost layer of the material and a flat porous spreading element impregnated with a low viscosity processing liquid. The impregnation is brought about by providing during or prior to processing for a contact between the spreading element in at least parts thereof with the liquid content of a container for the processing liquid. The spreading element may be flexible or rigid and may consist of woven or knitted fabrics, non-woven webs of endless filaments or staple fibres, non-woven webs of paper fibres, porous plastic foils or porous metal layers.
Inventors
- 👤 Rudolf Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:15
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/261; G03D; G03D5/00; G03D5/06; G03D5/065
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
188 words
A process for processing a photographic material of a single-layered or multi-layered photosensitive material with a low viscosity processing liquid comprising the steps of contacting a surface of the uppermost layer of the photographic material with a spreading element consisting essentially of a material having the characteristics of providing distribution of liquid by capillary forces in a very thin flat porous spreading means, transferring a processing liquid from a reservoir of said liquid into the flat porous spreading means, circulating additional processing liquid from said reservoir of said liquids to said contact with the photographic material by rapid distribution of the liquid through the flat porous spreading means and over the surface of the photographic material, while the spreading means is in contact with said processed photographic material distributing the processing liquid in the flat porous spreading means, including additional liquid over the surface of the photographic material by capillary force, and processing the photographic material with the processing liquid contacting the photographic material only upon the surface contact of the element with the photographic material surface, while the spreading means is in contact with the photographic material.
Claim 2
Dependent Claim
188 words
A process for processing a photographic material of a single-layered or multi-layered photosensitive material with a low viscosity processing liquid comprising the steps of contacting a surface of the uppermost layer of the photographic material with a spreading element consisting essentially of a material having the characteristics of providing distribution of liquid by capillary forces in a very thin flat porous spreading means, transferring a processing liquid from a reservoir of said liquid into the flat porous spreading means, circulating additional processing liquid from said reservoir of said liquids to said contact with the photographic material by rapid distribution of the liquid through the flat porous spreading means and over the surface of the photographic material, while the spreading means is in contact with said processed photographic material distributing the processing liquid in the flat porous spreading means, including additional liquid over the surface of the photographic material by capillary force, and processing the photographic material with the processing liquid contacting the photographic material only upon the surface contact of the element with the photographic material surface, while the spreading means is in contact with the photographic material.
Claim 3
Dependent Claim
15 words
The process of claim 1 in which the the spreading means are comprised of fibers.
Claim 4
Dependent Claim
17 words
The process of claim 1 in which the capillaries of the spreading means are comprised of cambric.
Claim 5
Dependent Claim
18 words
The process of claim 1 in which the the spreading means are comprised of a sintered metal plate.
Claim 6
Dependent Claim
19 words
The process of claim 1 in which the spreading element is formed integrally with walls containing said liquid reservoir.
Claim 7
Dependent Claim
25 words
Process according to claim 1 in which the low viscosity processing liquid has a viscosity η of from 1 to 20 mPa.s at room temperature.
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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) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |