Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1977-11-21
1980-06-17
Smith, Ronald H.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
282 275, 427 8, 427150, 427151, 427152, 427288, 427391, 428211, 428537, 428914, 4273982, B32B 714, B41M 516
Patent
active
042084601
ABSTRACT:
A process is described for continuously producing paper having a coating of dyestuff donor mass for reaction with a dyestuff acceptor mass. A web of the paper passes between a printing block surrounding a roller and a donor mass transfer roller whereby the paper is partially coated on one face with the donor mass. The transfer roller receives the donor mass from a system by which the viscosity of the mass is kept constant by a viscosity measuring device controlling the supply of solvent to the donor mass. The coated paper proceeds over a cooling roller, through a drying tunnel in which it is subjected to streams of hot air, and a further cooling roller. The dyestuff donor mass is thereby dried and consolidated and the paper continues through a printing device whereby text is printed onto the paper. The process can be used in the production of a transfer copying set comprising an upper sheet bearing a text on its upper face and a dyestuff acceptor mass over the whole of its lower face, one or more intermediate sheets partially coated on top with donor mass and wholly coated beneath with acceptor mass, and a lower sheet partially coated on top with donor mass.
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Dahler Paul
Knechtle Bruno
Bell Janyce A.
Blockfabrik Lichtensteig, AG
Smith Ronald H.
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