US4672022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation-sensitive printing plates with base which consists of an aluminum alloy having iron and manganese
Assignee: Hoechst AG
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Filing: 1985-07-09
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Granted: 1987-06-09
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Expires: 2005-07-09
Abstract
Abstract An aluminum alloy suitable as a base for printing plates consists essentially of aluminum containing iron (Fe) and manganese (Mn), the Fe content being 1.2 to 2.1% by weight, the Mn content being 0.1 to 0.9% by weight and the sum of the Fe and Mn contents being 1.3 to 2.2% by weight. A printing plate can be produced with such a base, the base being mechanically, chemically and/or electrochemically roughened and if required, anodically oxidized and hydrophilized. The printing plate includes at least one radiation-sensitive reproduction layer applied on the base.
Inventors
- 👤 Kurt Reiss
- 👤 Walter Niederstatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:55
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/04; B41N1/08; B41N1/083; C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
A printing plate produced by a process comprising the steps of: (a) providing an aluminum alloy base material in the form of a web, sheet or foil, said base material consisting essentially of, on a total weight basis, iron in an amount of from 1.2% by weight to about 2.1% by weight, manganese in an amount of from about 0.1% by weight to about 0.9% by weight, impurities in an amount up to a sum of maximum 0.4% by weight, the remainder being aluminum, the sum of the iron and the manganese being between about 1.3% by weight and about 2.2% by weight; (b) roughening said base material by means of at least one of a mechanical, chemical and electrochemical process to thereby give a peak-to-valley height in the range of from about 1 to 15 μm; and (c) providing at least one radiation-sensitive reproduction layer over said base material.
Claim 2
Dependent Claim
150 words
A printing plate produced by a process comprising the steps of: (a) providing an aluminum alloy base material in the form of a web, sheet or foil, said base material consisting essentially of, on a total weight basis, iron in an amount of from 1.2% by weight to about 2.1% by weight, manganese in an amount of from about 0.1% by weight to about 0.9% by weight, impurities in an amount up to a sum of maximum 0.4% by weight, the remainder being aluminum, the sum of the iron and the manganese being between about 1.3% by weight and about 2.2% by weight; (b) roughening said base material by means of at least one of a mechanical, chemical and electrochemical process to thereby give a peak-to-valley height in the range of from about 1 to 15 μm; and (c) providing at least one radiation-sensitive reproduction layer over said base material.
Claim 3
Dependent Claim
19 words
A printing plate as claimed in claim 1, wherein roughening of said base material is followed by anodic oxidation.
Claim 4
Dependent Claim
24 words
A printing plate as claimed in claim 2, wherein said anodic oxidation is followed by an hydrophilizing chemical or electrochemical treatment of said base.
Claim 5
Dependent Claim
19 words
A printing plate as claimed in claim 1, including the step of preliminary cleaning prior to said roughening step.
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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) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |