EP 0054907 A2 19820630 - Method for producing a fine weakened tear line on paper and apparatus for its production.
Title (en)
Method for producing a fine weakened tear line on paper and apparatus for its production.
Title (de)
Verfahren zur Herstellung einer Rissleine auf papier sowie Einrichtung zu deren Herstellung.
Title (fr)
Méthode pour la production de lignes de déchirure sur papier et appareil pour sa production.
Publication
Application
Priority
JP 17804280 A 19801218
Abstract (en)
A novel paper containing a fine weakened tear line and a method for the manufacture of the paper are disclosed. The fine weakened tear line for facilitating the tearing of the paper along this tear line is formed by causing a paper-weakening liquid which comprises a cellulose-degrading agent and water to be applied in a fine line to the paper surface and allowing the liquid to penetrate the paper in the direction of the thickness of paper thereby causing the liquid to degrade chemically the portion of cellulose of paper underlying the area of the fine line of liquid applied to the paper surface. Effective application of the liquid to the paper and consequent penetration of the liquid through the paper are accomplished advantageously under the pressure applied to the paper by use of a line-printing plate or a paper-incising pen.
IPC 1-7
IPC 8 full level
B41F 19/00 (2006.01); B26F 3/00 (2006.01); B26F 3/02 (2006.01); B31B 1/14 (2006.01); C09D 11/00 (2014.01); D21F 11/00 (2006.01)
CPC (source: EP)
B26F 3/002 (2013.01); D21F 11/006 (2013.01); D21H 5/0095 (2013.01); D21H 25/02 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0054907 A2 19820630; EP 0054907 A3 19840208; EP 0054907 B1 19870506; AU 552622 B2 19860612; AU 7859781 A 19820624; DE 3176152 D1 19870611; JP S57102969 A 19820626
DOCDB simple family (application)
EP 81110508 A 19811216; AU 7859781 A 19811217; DE 3176152 T 19811216; JP 17804280 A 19801218