US4292389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing photosensitive plates for printing
Assignee: Konica Minolta Inc
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Filing: 1980-01-24
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Granted: 1981-09-29
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Expires: 2000-01-24
Abstract
Abstract There is provided a process for preparing a photosensitive plate for printing which comprises providing a heat-depositable fine powder having a constant directional size of 0.5-40μ onto the surface of a photosensitive plate for printing at a ratio of 0.005-0.5 g. of the said powder per m 2 of the said plate to uniformly disperse and adhere the said powder onto the said surface, while preheating the right side (side on which powder adheres) and/or the reverse side of the said plate upon providing said powder or before or after providing, and subsequently contacting the right side of the said plate with a heating roll having a high releasing surface, whereby the said fine powder is fused and fixed on onto the surface of the said plate.
Inventors
- 👤 Hiroshi Kojima
- 👤 Kunio Ito
- 👤 Masami Akiyama
- 👤 Takeshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:00
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/115; Y; Y10; Y10S; Y10S430/00; Y10S430/136; Y10S430/151; Y10S430/162
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
110 words
A process for the production of a photosensitive plate for printing which comprises a photosensitive layer side and a support side having a fine powder fixed to the surface of said photosensitive layer side, which comprises uniformly dispersing and adhering a heat-depositable fine powder having a constant directional size of 0.5-40μ onto said surface of a photosensitive plate in an amount of 0.005-0.5 g. of the said powder per square meter of the said plate; preheating said photosensitive plate; and contacting said surface of said preheated plate to which said powder is adhered with a heating roll to fuse and fix said fine powder to said surface of said plate.
Claim 2
Dependent Claim
110 words
A process for the production of a photosensitive plate for printing which comprises a photosensitive layer side and a support side having a fine powder fixed to the surface of said photosensitive layer side, which comprises uniformly dispersing and adhering a heat-depositable fine powder having a constant directional size of 0.5-40μ onto said surface of a photosensitive plate in an amount of 0.005-0.5 g. of the said powder per square meter of the said plate; preheating said photosensitive plate; and contacting said surface of said preheated plate to which said powder is adhered with a heating roll to fuse and fix said fine powder to said surface of said plate.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said plate is preheated before said fine powder is dispersed thereon.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein said plate is preheated after said fine powder is dispersed thereon.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein said plate is preheated while said fine powder is dispersed thereon.
Claim 6
Dependent Claim
25 words
The process of claim 1 or 2 wherein said preheating is effected by contacting said support side of said photosensitive plate with a preheating roll.
Claim 7
Dependent Claim
25 words
The process of claim 1 or 2 wherein said preheating is effected by directing a non-contacting heating means against a surface of said photosensitive plate.
Claim 8
Dependent Claim
23 words
The process of claim 3 wherein said preheating is effected by directing a non-contacting heating means against a surface of said photosensitive plate.
Claim 9
Dependent Claim
17 words
The process of claim 5 wherein said non-contacting heating means are infrared rays or far infrared rays.
Claim 10
Dependent Claim
39 words
The process of claim 1, wherein said preheating comprises detecting the temperature of said preheated photosensitive plate and maintaining the temperature of said preheated photosensitive plate substantially constant immediately before contact of said photosensitive plate with said heating roll.
Claim 11
Dependent Claim
22 words
The process of claim 9, wherein said maintaining step comprises controlling the preheating of said photosensitive plate by means of a controller.
Claim 12
Dependent Claim
17 words
The process of claim 9, wherein said plate is preheated before said fine powder is dispersed thereon.
Claim 13
Dependent Claim
17 words
The process of claim 9 wherein said plate is preheated after said fine powder is dispersed thereon.
Claim 14
Dependent Claim
17 words
The process of claim 9 wherein said plate is preheated while said fine powder is dispersed thereon.
Claim 15
Dependent Claim
23 words
The process of claim 9 wherein said preheating is effected by contacting said support side of said photosensitive plate with a preheating roll.
Claim 16
Dependent Claim
23 words
The process of claim 9 wherein said preheating is effected by directing a non-contacting heating means against a surface of said photosensitive plate.
References Cited (Backward Citations)
US3687703A
Cited
US4168979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |