Letterpress printing method and applicator device for its implementation
AssigneesGeorg Bolte, Lutz Nolle, Franz-Josef Driller
InventorsGeorge Bolte, Lutz Nolle, Franz-Josef Driller
Life of this patent
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Abstract
According to a method for applying binder systems, particularly printing ink, to web material using the letterpress printing process, a solvent-free binder system is applied to the letterpress form of an application roller by means of a pattern roller having a cell pattern with a cell depth of .ltoreq.15 .mu.m. The applicator device has an impression cylinder and one or more application rollers, each of which is supplied with a binder system, preferably printing ink, via a binder application system equipped with a pattern roller, with the pattern roller having a cell pattern with a cell depth of .ltoreq.15 .mu.m.
Claims19
A method for applying a binder system to web material using a letterpress printing process which comprises applying the binder system to the letterpress form of an application roller by means of a pattern roller applying a solvent-free binder system by means of a pattern roller having a cell pattern with a cell depth .ltoreq.15 .mu.m, wherein the improvement comprises:
- a radiation-curable printing ink being used as the solvent-free binder system;
- or
- a radiation-curable laminating adhesive being used as the solvent-free binder system a second web of material being laminated onto the web material coated with the adhesive and the adhesive being radiation-cured before and/or after the lamination.
An applicator device comprising an impression cylinder (11), at least one application roller (12) and a binder application system (17) which supplies each application roller with a binder system, said binder application system (17) being equipped with a pattern roller (13) having a cell pattern with a depth (t) of .ltoreq.15 .mu.m,
- wherein the improvement comprises the binder application system (17) including a chamber-type doctor blade (52) for supplying a pattern roller (13) with the binder system, said chamber-type doctor blade (52) having a binder level control (53) which is emptied by a container (58) connected to said chamber-type doctor blade (52) via two-way pump (57) and a single binder line (56).
An applicator device comprising an impression cylinder (11), at least one application roller (12) and a binder application system (17) which supplies each application roller with a binder system, said binder application system (17) being equipped with a pattern roller (13) having a cell pattern with a depth (t) of 1 to 10 .mu.m.
A method for applying a binder system to web material using a letterpress printing process which comprises applying the binder system to the letterpress form of an application roller by means of a pattern roller, and applying a solvent-free binder system by means of a pattern roller having a cell pattern with a cell depth of .ltoreq.15 .mu.m, wherein the solvent-free binder system is:
- a printing ink with a pigment content of 20 to 50 wt. % and a viscosity of 0.08 to 0.12 Pa s at a temperature of about 40.degree. C., wherein the printing ink is processed at a temperature of 40.degree.-60.degree. C.;
- or
- a radiation-curable laminating adhesive, wherein a second web of material is laminated onto the web material coated with the adhesive, and the adhesive is radiation-cured before and/or after lamination.
Dependencies are inferred from the claim text.