Back to results
US 5,379,697 AGranted
Printing machine
AssigneeBHS Druck- und Veredelungstechnik GmbH
InventorWolfgang Ertl
Life of this patent
Estimating the term…
Abstract
A printing machine structured in modular design, in particular a flexo printing machine, has a printing unit on a stand, on which printing unit a web in particular of a plastic foil or a metal foil is printed with color curing under UV radiation. A UV radiation and cooling unit is arranged on the stand and has a cooling cylinder and at least one UV radiator. The web surrounds the cooling cylinder at a great angle of contact.
Claims7
A web printing machine comprising:
- a stand (1) having a plurality of radiator mounting sites;
- a printing unit (3) mounted on the stand (1) and provided with an applicator (8) for applying a UV light-curing ink to a web (15);
- deflection pulleys (16, 26, 28) for transporting the web (15) selectively toward and away from the printing unit (3) generally in a direction of transport (24);
- a UV radiation and cooling unit (17) including a cooling cylinder (18) and at least one UV radiator (23, 23', 23", 23'"), the cooling cylinder (18) having an outer circumference (22) along which the web (15) is guidable when printed, the UV radiation and cooling unit (17) being connected to a cooling water flow pipe (20) and a cooling water return pipe (21), said at least one UV radiator being demountably disposed upon the stand (1) at one of said plurality of modular radiator mounting sites, said mounting sites being deployed along the direction of transport (24), said at least one UV radiator being disposed at a small distance from the outer circumference (22) of the cooling cylinder (18).
1 more element
A UV radiation and cooling unit adapted for use with a web press for printing UV-curing inks on a web, the UV radiation and cooling unit comprising:
- a cooling cylinder (18) having a surface;
- deflection pulleys (16, 26, 28) and the cooling cylinder for wrapping the web over the surface about the cooling cylinder through a wrapping angle;
- a radiator mounting site adjacent the surface of the cooling cylinder;
- a UV radiator (23, 23', 23", 23'"), adapted for mounting on the mounting site, for radiating with UV the portion of the web wrapped over the surface of said cooling cylinder;
- and
- cooling means in said cooling cylinder for cooling the web by removing heat from the cooling cylinder.
3 more elements
Dependencies are inferred from the claim text.