Patent US4034183A successfully refreshed from Google Patents.
US4034183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of planographic printing forms by means of laser beams
Assignee: Hoechst AG
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Filing: 1975-10-08
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Granted: 1977-07-05
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Expires: 1995-10-08
Abstract
Abstract This invention relates to an improvement in the process for the production of a planographic printing form in which a carrier coated with a hydrophilic layer composed of a non-light-sensitive compound is imagewise exposed, the improvement comprising imagewise exposing the layer to laser radiation, whereby the material obtained may be used for printing in a planographic printing machine without further treatment.
Inventors
- 👤 Fritz Uhlig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:06
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; B; B41; B41C; B41C1/00; B41C1/10; B41C1/1041; Y; Y02; Y02P; Y02P30/00; Y02P30/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
In the process for the production of a planographic printing form in which a carrier coated with a hydrophilic layer composed of a non-light-sensitive compound is imagewise exposed, the improvement comprising imagewise exposing the layer to laser radiation of an intensity and for a period such that the exposed areas are rendered hydrophobic and oleophilic, whereby the printing form obtained may be used for printing in a planographic printing machine without further treatment.
Claim 2
Dependent Claim
73 words
In the process for the production of a planographic printing form in which a carrier coated with a hydrophilic layer composed of a non-light-sensitive compound is imagewise exposed, the improvement comprising imagewise exposing the layer to laser radiation of an intensity and for a period such that the exposed areas are rendered hydrophobic and oleophilic, whereby the printing form obtained may be used for printing in a planographic printing machine without further treatment.
Claim 3
Dependent Claim
17 words
A process according to claim 1 in which the hydrophilic layer comprises a water-soluble, film-forming organic compound.
Claim 4
Dependent Claim
18 words
A process according to claim 2 in which the hydrophilic layer comprises a water-soluble, high-molecular weight organic compound.
Claim 5
Dependent Claim
12 words
A process according to claim 1 in which the carrier is metal.
Claim 6
Dependent Claim
36 words
A process according to claim 4 in which the carrier has a water-insoluble hydrophilic layer which comprises the reaction product of the metal surface with a monomeric or polymeric organic or inorganic acid or salts thereof.
Claim 7
Dependent Claim
12 words
A process according to claim 4 in which the carrier is aluminum.
Claim 8
Dependent Claim
18 words
A process according to claim 1 in which the hydrophilic layer additionally contains a dye as a sensitizer.
Claim 9
Dependent Claim
12 words
A planograhic printing form prepared according to the process of claim 1.
References Cited (Backward Citations)
US3787873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |