Patent US4142194A successfully refreshed from Google Patents.
US4142194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web processor
Assignee: EIDP Inc
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Filing: 1977-09-06
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Granted: 1979-02-27
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Expires: 1997-09-06
Abstract
Abstract A processor for photopolymerizable films is described. In this processor, film is fed, image up, in a straight through path by a series of soft rubber covered transport rollers first into a development section, then to a rinse section, and finally to a dryer section. In the developer section, developer is delivered through spray pipes which maintain a curtain of developer cascading over the top rolls at both the entrance and exit of the developer section. The film is thus maintained flooded in a precisely controlled, well defined surface region such that the time in which the film undergoes development may be accurately controlled by varying film speed. The film is then rinsed in the rinse section by a high impact spray system and then dried.
Inventors
- 👤 James S. Hamlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:38
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3042
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
Apparatus having first and second contiguous sections for processing a photosensitive layer on a substrate comprising, in combination, drive means for moving said substrate through said sections, layer side up, said drive means including nip roll pairs at the entrance and exit of each processing section, first and second fluid supply means for applying substantially uniform curtains of a fluid processing material to said layer at the entrance and exit of said first section for establishing and maintaining a uniform pool of said fluid processing material across said layer from said entrance to said exit, and rinse means in said second section for rinsing said layer, each of said fluid supply means including a barrier means extending longitudinally of the upper roll in each pair within said first section for preventing the escape of processing material.
Claim 2
Dependent Claim
136 words
Apparatus having first and second contiguous sections for processing a photosensitive layer on a substrate comprising, in combination, drive means for moving said substrate through said sections, layer side up, said drive means including nip roll pairs at the entrance and exit of each processing section, first and second fluid supply means for applying substantially uniform curtains of a fluid processing material to said layer at the entrance and exit of said first section for establishing and maintaining a uniform pool of said fluid processing material across said layer from said entrance to said exit, and rinse means in said second section for rinsing said layer, each of said fluid supply means including a barrier means extending longitudinally of the upper roll in each pair within said first section for preventing the escape of processing material.
Claim 3
Dependent Claim
19 words
Apparatus according to claim 1 wherein said drive means moves said substrate along a path approximating a straight line.
Claim 4
Dependent Claim
33 words
Apparatus according to claim 2 wherein said drive means includes a support for said web, said support having wires lying in a horizontal plane, said wires being substantially parallel to said straight line.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 1 wherein said rinse means includes water impact sprays for removing loose portions from said substrate.
Claim 6
Dependent Claim
49 words
Apparatus according to claim 4 wherein said water impact sprays include a first spray operated at a first pressure directed to the under side of said substrate and a second spray operated at a second pressure greater than said first pressure directed to the layer side of said substrate.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 1 wherein said barrier means is a wiper located above but contacting the upper roll and each fluid supply means also includes a dispenser of fluid processing material directed at its wiper.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |