EP1247644A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Support for lithographic printing plate and original forme for lithographic printing plate
Assignee: Fujifilm Corp
•
Filing: 2002-04-03
•
Granted: —
•
Expires: 2022-04-03
Abstract
Abstract This invention provides a support for a lithographic printing plate, and an original form of a heat-sensitive lithographic printing plate, which comprises a hydrophilic film formed on a metallic base whose surface has been roughened, said hydrophilic film having a heat conductivity of 0.05 - 0.5 W/(m·K) in the direction of its film thickness, which when used as the development on machine type, exhibits good on-press, or good non-treatment developability, a high sensitivity, a long press life and a preferable stain resistance and ink removal property upon printing and which, when used as a conventional thermal positive or negative type, makes efficient utilization of heat for the formation of image, has a high sensitivity and exhibits a long press life and a good stain resistance in a nonimage area, wherein the non-treatment in which the development is not performed.
Inventors
- 👤 Hisashi Hotta
- 👤 Yoshinori Hotta
- 👤 Kazuo Maemoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/036; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C1/1016; B41C2201/00; B41C2201/02; B41C2201/04; B41C2201/06; B41C2201/14; B41C2210/00; B41C2210/02; B41C2210/04; B41C2210/08; B41C2210/22; B41C2210/24; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
41 words
A support for a lithographic printing plate, which
comprises a hydrophilic film formed on a metallic base
whose surface has been roughened, said hydrophilic film
having a heat conductivity of 0.05 - 0.5 W/(m·K) in the
direction of its film thickness.
Claim 2
Dependent Claim
24 words
A support for a lithographic printing plate
according to claim 1, wherein the film thickness of said
hydrophilic film is 0.1 - 5 µm.
Claim 3
Dependent Claim
40 words
An original forme for a lithographic printing
plate, which comprises a recording layer formed on said
support for a lithographic printing plate as set forth in
claim 1 or 2, said recording layer being writable by
exposure with infrared laser.
Claim 4
Dependent Claim
61 words
An original forme for a lithographic printing
plate, comprising a recording layer which is writable by
exposure with infrared laser and which is formed on a
support for a lithographic printing plate, said support
being subjected to electrochemical roughening treatment
with an aqueous solution containing hydrochloric acid and
including a hydrophilic film having a heat conductivity of
0.05 - 0.5 W/(m·K).
Claim 5
Dependent Claim
66 words
An original forme for a lithographic printing
plate, comprising a recording layer which is writable by
exposure with infrared laser and which is formed on a
support for a lithographic printing plate, said support
being subjected to electrochemical roughening treatment
with an aqueous solution containing hydrochloric acid and
including a hydrophilic film having a density of 1000 -
3200 kg/m 3 and/or a porosity of 20-70%.
Claim 6
Dependent Claim
78 words
An original forme for a lithographic printing
plate, comprising a recording layer which is writable by
exposure with infrared laser and which is formed on a
support for a lithographic printing plate having a
hydrophilic film, said hydrophilic film having a mean
opening diameter of roughened small pits of 0.01-3 µm, a
ratio of mean depth to mean opening diameter of the
roughened small pits of 0.1 - 0.5, and a heat conductivity
of 0.05 - 0.5 W/(m·K).
Claim 7
Dependent Claim
85 words
An original forme for a lithographic printing
plate, comprising a recording layer which is writable by
exposure with infrared laser and which is formed on a
support for a lithographic printing plate having a
hydrophilic film, said hydrophilic film having a mean
opening diameter of roughened small pits of 0.01 - 3 µm, a
ratio of mean depth to mean opening diameter of the
roughened small pits of 0.1 - 0.5, and a density of 1000-3200
kg/m 3 and/or a porosity of 20 - 70%.
Claim 8
Dependent Claim
38 words
An original forme for a lithographic printing
plate according to any one of claims 4 to 7, wherein the
mean opening diameter of large undulation of said support
for a lithographic printing plate is 3 - 20 µm.
Claim 9
Dependent Claim
26 words
An original forme for a lithographic printing
plate according to any one of claims 4 to 8, wherein said
hydrophilic film is an anodic oxide film.
Claim 10
Dependent Claim
32 words
An original forme for a lithographic printing
plate according to claim 9, wherein the amount of said
anodic oxide film formed is 3.2 g/m 2 or more than 3.2 g/m 2 .
Claim 11
Dependent Claim
35 words
An original forme for a lithographic printing
plate according to claim 9 or 10, wherein the pore diameter
on the surface layer of said anodic oxide film is 40 nm or
less than 40 nm.
Claim 12
Dependent Claim
24 words
An original forme for a lithographic printing
plate according to any one of claims 9 to 11, wherein said
anodic oxide film is pore-sealed.
Claim 13
Dependent Claim
39 words
An original forme for a lithographic printing
plate according to any one of claims 9 to 12, wherein a
layer of particles having a mean particle size of 8 - 800
nm is formed on said anodic oxide film.
Claim 14
Dependent Claim
34 words
An original forme for a lithographic printing
plate according to any one of claims 9 to 13, wherein said
anodic oxide film is formed by anodic oxidation that
consists of more than two steps.
Claim 15
Dependent Claim
42 words
An original forme for a lithographic printing
plate according to claim 14, wherein the anodic oxidation
is performed with an electrolyte containing sulfuric acid
in the first step and then with an electrolyte containing
phosphoric acid in the second and subsequent steps.
Claim 16
Dependent Claim
49 words
An original forme for a lithographic printing
plate according to any one of claims 3 to 15, wherein said
recording layer is a heat-sensitive layer containing one
of: (a) fine polymer particles having a heat reactive
functional group; and (b) microcapsuls including a compound
having heat reactive functional group.
Claim 17
Dependent Claim
65 words
A plate-making and printing method for a
lithographic printing plate, wherein said original forme
for a lithographic printing plate as set forth in any one
of claims 3 to 16 is printable by one of: exposing it to a
laser beam and then directly mounting it to a printing
machine; and directly exposing it to a laser beam after
mounting it to a printing machine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.