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1. EP1826021 - Plaques d'impression lithographique à action positive

Office
Office européen des brevets (OEB)
Numéro de la demande 06110468
Date de la demande 28.02.2006
Numéro de publication 1826021
Date de publication 29.08.2007
Type de publication B1
CIB
B41N 3/03
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
41IMPRIMERIE; LIGNARDS; MACHINES À ÉCRIRE; TIMBRES
NCLICHÉS OU PLAQUES D'IMPRESSION; MATÉRIAUX POUR SURFACES UTILISÉES DANS L'IMPRESSION POUR IMPRIMER, ENCRER, MOUILLER OU SIMILAIRE; PRÉPARATION DE TELLES SURFACES POUR LEUR EMPLOI OU LEUR CONSERVATION
3Préparation en vue de l'emploi ou de la conservation des surfaces d'impression
03Prétraitement chimique ou électrique
B41C 1/10
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
41IMPRIMERIE; LIGNARDS; MACHINES À ÉCRIRE; TIMBRES
CPROCÉDÉS DE FABRICATION OU DE REPRODUCTION DES SURFACES D'IMPRESSION
1Préparation de la forme ou du cliché
10pour l'impression lithographique; Feuilles-mère pour le report d'une image sur la forme
CPC
B41C 1/1016
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
1Forme preparation
10for lithographic printing; Master sheets for transferring a lithographic image to the forme
1008by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
1016characterised by structural details, e.g. protective layers, backcoat layers or several imaging layers
B41C 2201/02
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
2201Location, type or constituents of the non-imaging layers in lithographic printing formes
02Cover layers; Protective layers
B41C 2201/14
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
2201Location, type or constituents of the non-imaging layers in lithographic printing formes
14characterised by macromolecular organic compounds, e.g. binder, adhesives
B41C 2210/02
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
2210Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
02Positive working, i.e. the exposed (imaged) areas are removed
B41C 2210/06
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
2210Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
06Developable by an alkaline solution
B41C 2210/14
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
2210Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
14Multiple imaging layers
Déposants AGFA GRAPHICS NV
Inventeurs CAMPESTRINI PAOLA
VAN DAMME MARC
LINGIER STEFAAN
États désignés
Données relatives à la priorité 06110468 28.02.2006 EP
Titre
(DE) Positiv arbeitende Lithografiedruckformen
(EN) Positive working lithographic printing plates
(FR) Plaques d'impression lithographique à action positive
Abrégé
(EN)
A positive-working lithographic printing plate precursor is disclosed comprising on a grained and anodized aluminum support having a hydrophilic surface or which is provided with a hydrophilic layer, a coating comprising: (i) an infrared absorbing agent and at least one colorant; (ii) a first layer comprising a heat-sensitive oleophilic resin, (iii) and a second layer between said first layer and said hydrophilic support wherein said second layer comprises a polymer comprising at least one monomeric unit that comprises at least one sulfonamide group; characterized in that the surface of said grained and anodized aluminum support has a mean pit depth equal or smaller than 2.2 µm.