US4547274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for lithographic printing plate and lithographic printing plate
Assignee: Fujifilm Holdings Corp
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Filing: 1983-06-01
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Granted: 1985-10-15
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Expires: 2003-06-01
Abstract
Abstract A lithographic printing plate support and a process for producing it are disclosed. The plate is produced by providing an aluminum alloy material which is comprised of 0.20 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga and Zn and the remainder being aluminum. The alloy may further contain 0.1 to 2% Cu. After providing the aluminum material either or both of its surfaces are subjected to a chemical etching treatment in order to provide a uniform and dense grain structure on the surface forming primary pits in the surface having a particularly defined average size. The surface is then subjected to electrochemical etching treatment in an acidic electrolytic solution in order to provide secondary pits on the surface also having a particularly defined average size. The support base may be further treated to provide in additional coating thereon or directly coated with a light-sensitive layer in order to provide a light-sensitive lithographic printing plate. By providing the particular alloy material and subjecting it to the disclosed treatment the light-sensitive layer has good adhesion with respect to the support.
Inventors
- 👤 Azusa Ohashi
- 👤 Hirokazu Sakaki
- 👤 Haruo Nakanishi
- 👤 Zenichi Tanabe
- 👤 Shin Tsuchida
- 👤 Yoshikatsu Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:39
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/04; B41N1/08; B41N1/083; C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
121 words
A support for a lithographic printing plate, which comprises an aluminum alloy material containing 0.20 to 1.0% Fe and 0.005 to 0.1% of at least one of the elements Sn, In, Ga and Zn and having at least on one surface thereof a unifrom and dense grain structure formed by subjecting its surface to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali and then to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 2
Dependent Claim
121 words
A support for a lithographic printing plate, which comprises an aluminum alloy material containing 0.20 to 1.0% Fe and 0.005 to 0.1% of at least one of the elements Sn, In, Ga and Zn and having at least on one surface thereof a unifrom and dense grain structure formed by subjecting its surface to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali and then to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 3
Dependent Claim
22 words
The support for lithographic printing plate as described in claim 1, wherein said aluminum alloy material further contains 0.1 to 2% Cu.
Claim 4
Dependent Claim
51 words
The support for lithographic printing plate as described in claim 1, wherein the surface of said aluminum alloy material forms a rough plane having primary pits of 0.3 to 1.2 μm (presented as Ra) in average roughness or 1 to 10 μm in average depth formed by the chemical etching treatment.
Claim 5
Dependent Claim
48 words
The support for lithographic printing plate as described in claim 1, wherein the surface of said aluminum alloy material forms a rough plane having secondary pits of 1 μm or less in average depth and 5 μm or less in average opening diameter formed by the electrochemical treatment.
Claim 6
Dependent Claim
129 words
A light-sensitive lithographic printing plate, which comprises a support having provided thereon a light-sensitive layer, said support comprising an aluminum alloy material containing 0.20 to 1.0% Fe and 0.005 to 0.1% of at least one of the elements Sn, In, Ga and Zn and having at least one surface thereof a uniform and dense grain structure formed by subjecting its surface to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali and then to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 7
Dependent Claim
129 words
A light-sensitive lithographic printing plate, which comprises a support having provided thereon a light-sensitive layer, said support comprising an aluminum alloy material containing 0.20 to 1.0% Fe and 0.005 to 0.1% of at least one of the elements Sn, In, Ga and Zn and having at least one surface thereof a uniform and dense grain structure formed by subjecting its surface to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali and then to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 8
Independent Claim
134 words
A method for producing a lithographic printing plate support, comprising the steps of: providing an aluminum alloy material comprised of 0.20 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga, and Zn, and the remainder being aluminum; subjecting a surface of the aluminum alloy material to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali in order to form uniform and dense grain structure on the surface; subjecting the surface to electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 9
Independent Claim
134 words
A method for producing a lithographic printing plate support, comprising the steps of: providing an aluminum alloy material comprised of 0.20 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga, and Zn, and the remainder being aluminum; subjecting a surface of the aluminum alloy material to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali in order to form uniform and dense grain structure on the surface; subjecting the surface to electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 10
Dependent Claim
27 words
The method for producing a lithographic printing plate support as described in claim 6, wherein the aluminum alloy material is further comprised of 0.1 to 2% Cu.
Claim 11
Dependent Claim
57 words
The method for producing a lithographic printing plate support as described in claim 7, wherein the chemical etching treatment provides pits in the surface so that the surface has an average roughness (Ra) in the range of 0.3 to 1.2 μm and the pits formed in the surface have an average depth of 1 to 10 μm.
Claim 12
Dependent Claim
42 words
The method for producing a lithographic printing plate support as described in claim 8, wherein the electrochemical treatment forms secondary pits in the surface having an average depth of 1 μm or less and an average diameter of 5 μm or less.
Claim 13
Dependent Claim
137 words
A lithographic printing plate support produced by the process comprising the steps of: providing an aluminum alloy material comprised of 0.2 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga and Zn and the remainder being aluminum; subjecting a surface of the aluminum alloy material to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali in order to form a uniform and dense grain structure on the surface; and subjecting the surface to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 14
Dependent Claim
137 words
A lithographic printing plate support produced by the process comprising the steps of: providing an aluminum alloy material comprised of 0.2 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga and Zn and the remainder being aluminum; subjecting a surface of the aluminum alloy material to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali in order to form a uniform and dense grain structure on the surface; and subjecting the surface to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC.
Claim 15
Dependent Claim
77 words
The lithographic printing plate support produced by the process as described in claim 10, wherein the aluminum alloy material is further comprised of 0.1 to 2% Cu, the chemical etching treatment provides primary pits having an average diameter of 0.3 to 1.2 μm and an average depth of 1 to 10 μm, and the electrochemical treatment provides secondary pits having an average depth of 1 μm or less and an average diameter of 5 μm or less.
Claim 16
Independent Claim
197 words
A method for producing a light-sensitive lithographic printing plate, comprising the steps of: providing an aluminum alloy material comprised of 0.20 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga and Zn, 0.1 to 2% Cu and the remainder being aluminum; subjecting a surface of the aluminum alloy material to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali in order to form uniform and dense grain structure on the surface with primary pits having an average diameter of 0.3 to 1.2 μm and an average depth of 1 to 10 μm; subjecting the surface to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC to provide secondary pits having an average depth of 1 μm or less and an average diameter of 5 μm or less; and providing a light-sensitive layer on the uniform and dense grain structure on the surface.
Claim 17
Independent Claim
197 words
A method for producing a light-sensitive lithographic printing plate, comprising the steps of: providing an aluminum alloy material comprised of 0.20 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga and Zn, 0.1 to 2% Cu and the remainder being aluminum; subjecting a surface of the aluminum alloy material to a chemical etching treatment carried out using a material selected from the group consisting of an acid and an alkali in order to form uniform and dense grain structure on the surface with primary pits having an average diameter of 0.3 to 1.2 μm and an average depth of 1 to 10 μm; subjecting the surface to an electrochemical etching treatment in an acidic electrolytic solution containing a material selected from the group consisting of hydrochloric acid or its salt, nitric acid or its salt, and a mixture thereof and using current selected from the group consisting of DC and AC to provide secondary pits having an average depth of 1 μm or less and an average diameter of 5 μm or less; and providing a light-sensitive layer on the uniform and dense grain structure on the surface.
Claim 18
Dependent Claim
34 words
The method for producing a light-sensitive lithographic printing plate as described in claim 12, wherein the light-sensitive layer is present in an amount within the range of 0.1 to about 7 g/m 2 .
Claim 19
Dependent Claim
33 words
The method for producing a light-sensitive lithographic printing plate as described in claim 13, wherein the light-sensitive layer is present in an amount within the range of 0.5 to 4 g/m 2 .
Claim 20
Dependent Claim
83 words
A support for a lithographic printing plate as claimed in claim 1, wherein the concentration of the etching solution ranges from 1 to 50%, the treating temperature ranges from 20° C. to 90° C., and the treating time ranges from 10 seconds to about four minutes, and wherein the concentration of the electrolytic solution is 0.1 to 100 g/l, the temperature of the electrolytic solution ranges from 20° C. to 60° C., and the treating time ranges from 1 second to 10 minutes.
Claim 21
Dependent Claim
81 words
A light-sensitive lithographic printing plate as claimed in claim 5, wherein the concentration of the etching solution ranges from 1 to 50%, the treating temperature ranges from 20° C. to 90° C., and the treating time ranges from 10 seconds to about four minutes, and wherein the concentration of the electrolytic solution is 0.1 to 100 g/l, the temperature of the electrolytic solution ranges from 20° C. to 60° C., and the treating time ranges from 1 second to 10 minutes.
References Cited (Backward Citations)
US3980539A
Cited
US3935080A
Cited
US4198278A
Cited
US4301229A
Cited
US4367124A
Cited
US4427500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |