US4063949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of planographic printing forms using laser beams
Assignee: Hoechst AG
•
Filing: 1977-02-22
•
Granted: 1977-12-20
•
Expires: 1997-02-22
Abstract
Abstract This invention relates to an improvement in the process for the preparation of a planographic printing form in which a recording material comprising a support of anodically oxidized aluminum and a recording layer thereon is imagewise irradiated with a laser beam, thereby rendering the irradiated portions of the recording layer oleophilic and/or insoluble, and the non-irradiated portions of the recording layer are then removed, where necessary, by washing with a developer liquid, the improvement comprising an oxide layer on said support weighing at least 3 grams per square meter.
Inventors
- 👤 Fritz Uhlig
- 👤 Ine Gramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:26
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/034; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C2210/00; B41C2210/04; B41C2210/06; B41C2210/24; B41C2210/26; B41C2210/262; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
In the process for the preparation of a planographic printing form in which a recording material comprising a support of anodically oxidized aluminum and a recording layer thereon is imagewise irradiated with a laser beam, thereby rendering the irradiated portions of the recording layer oleophilic and/or insoluble, and the non-irradiated portions of the recording layer are then removed, where necessary, by washing with a developer liquid, the improvement comprising an oxide layer on said support weighing at least 3 grams per square meter.
Claim 2
Dependent Claim
83 words
In the process for the preparation of a planographic printing form in which a recording material comprising a support of anodically oxidized aluminum and a recording layer thereon is imagewise irradiated with a laser beam, thereby rendering the irradiated portions of the recording layer oleophilic and/or insoluble, and the non-irradiated portions of the recording layer are then removed, where necessary, by washing with a developer liquid, the improvement comprising an oxide layer on said support weighing at least 3 grams per square meter.
Claim 3
Dependent Claim
20 words
A process according to claim 1 in which said oxide layer weighs from 5 to 12 grams per square meter.
References Cited (Backward Citations)
US3664737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |