Process and apparatus for contact printing with supply of...

B - Operations – Transporting – 41 – M

Patent

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B41M 1/00 (2006.01) B41M 1/02 (2006.01) B41M 1/04 (2006.01)

Patent

CA 2472751

Method and apparatus in which a first liquid is extruded through a porous printing plate to its printing surface, a second liquid is externally applied over the first liquid on the printing surface, and a sheet material is contacted with the printing surface in order to print the second liquid onto the sheet material. In some embodiments, the first liquid is a release agent, the second liquid is a printing agent, and a sheet material is contacted with the printing agent on the printing surface, whereby the release agent prevents the adhesion of the printing agent and the sheet material to the printing surface and thereby allows the sheet material to be easily separated from the printing surface. In some embodiments, the printing agent is an adhesive and the release agent prevents the adhesive from strongly adhering to or accumulating on the printing surface.

L'invention concerne un procédé et un appareil dans lesquels le procédé consiste à extruder un premier liquide à travers une plaque d'impression poreuse jusqu'à sa surface d'impression, à appliquer un second liquide, de façon externe, sur le premier liquide présent sur la surface d'impression, et à mettre en contact un matériau en feuille avec la surface d'impression de façon à transférer par impression le second liquide sur le matériau en feuille. Dans certains modes de réalisation, le premier liquide est un agent antiadhésif, le second liquide est un agent d'impression et le matériau en feuille est mis en contact avec l'agent d'impression sur la surface d'impression, l'agent antiadhésif empêchant l'adhérence de l'agent d'impression et du matériau en feuille sur la surface d'impression, permettant ainsi une séparation facile du matériau en feuille de la surface d'impression. Dans d'autres modes de réalisation, l'agent d'impression est un adhésif et l'agent antiadhésif empêche cet adhésif d'adhérer fortement ou de s'accumuler sur la surface d'impression.

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