Global Patent Index - EP 0286020 A3

EP 0286020 A3 19890426 - METHOD OF JOINING THE CUT-UP EDGES OF PHOTOPOLYMERISED FLEXOGRAPHIC FORMES

Title (en)

METHOD OF JOINING THE CUT-UP EDGES OF PHOTOPOLYMERISED FLEXOGRAPHIC FORMES

Publication

EP 0286020 A3 19890426 (DE)

Application

EP 88105252 A 19880331

Priority

DE 3712070 A 19870409

Abstract (en)

[origin: US4828641A] A method of joining the edges of flexographic printing plates on printing cylinders, which includes the following steps: (i) fixing the printing plates to make-ready cylinders by means of a first double-sided self-adhesive film having the same area as the printing plate, (ii) cutting the printing plates to size so that they fit the printing cylinders, (iii) removing the cut printing plates from the make-ready cylinders and from the first self-adhesive films, (iv) fixing the cut printing plates by means of a second double-sided self-adhesive film, which has the same area as the printing plates and from 1.6 to 2.6 times the thickness of the first self-adhesive films, so that defined gaps result between the edges of the fixed printing plates, (v) filling the gaps between the edges to be joined, with a liquid photopolymerizable mixture of binders, photopolymerizable monomers and photopolymer, ization initiators and (vi) partially polymerizing the mixture under a transparent film cover by exposure to UV light until the elongation at break in the composite consisting of the solid gap closing compound and the printing plate material fulfils the condition RS<RS/F<<RF where RS is the elongation at break of the partially polymerized gap closing compound, RS/F is the elongation at break in the interface between the gap closing compound and the printing plate material and RF is the elongation at break of the printing plate material.

IPC 1-7

B41F 27/06; B41D 5/00

IPC 8 full level

G03F 7/00 (2006.01); B41D 5/00 (2006.01); B41F 27/06 (2006.01); B41F 27/12 (2006.01); B41N 6/02 (2006.01)

CPC (source: EP US)

B41D 5/00 (2013.01 - EP US); B41F 27/1275 (2013.01 - EP US); B41F 27/1293 (2013.01 - EP US); B41N 6/02 (2013.01 - EP US); B41C 1/05 (2013.01 - EP US); Y10T 156/1066 (2015.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0286020 A2 19881012; EP 0286020 A3 19890426; EP 0286020 B1 19910731; AT E65743 T1 19910815; DE 3712070 A1 19881020; DE 3863955 D1 19910905; ES 2023457 B3 19920116; JP S63261364 A 19881028; US 4828641 A 19890509

DOCDB simple family (application)

EP 88105252 A 19880331; AT 88105252 T 19880331; DE 3712070 A 19870409; DE 3863955 T 19880331; ES 88105252 T 19880331; JP 8554788 A 19880408; US 17890488 A 19880407