Laminating roller for laminating presses and method for producing laminating rollers
OwnerDirk Maesinventor
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Abstract
The invention relates to a laminating roller for laminating presses. The laminating roller has a rigid roller core (20) and a friction layer (24), preferably composed of elastomeric material, which is arranged on the roller core (20). It can be heated by means of a heating element. To simplify the structure of the laminating press, the invention proposes that the heating unit (18) should be arranged between the roller core (20) and the friction layer (24). It is expediently in the form of a heating-resistance element track applied by a thick-film technique with an insulating layer in between.
Claims23
Laminating roller for a laminating press comprising:
- a rigid roller core;
- a heating unit comprising a heating-resistance element track composed of resistive paste and conductor tracks adjoining the heating-resistance element track and having slip rings composed of conductive paste, the resistive and conductive pastes being hardenable by firing;
- and
- a friction layer arranged on the roller core and heatable by means of the heating unit, the heating unit being arranged between the roller core and the friction layer.
Laminating roller according to claim B, wherein the thick-film or hybrid circuit contains a thermistor which responds to the temperature of the roller.
Method of producing heatable laminating rollers, comprising the steps of
- forming a roller core as a metal tube;
- providing the roller core with an insulating layer;
- coating or printing the insulating layer with a heating-resistance element track composed of resistive paste and extending at least over part of the circumference and length of the roller core and conductor tracks adjoining the heating-resistance element track and having slip rings composed of conductive paste and arranged at the ends of the roller core, surrounding the roller core in the circumferential direction;
- hardening the resistive and conductive pastes by firing;
- and
- applying a friction layer of elastomeric material to the surface of the roller, leaving the slip rings free.
Dependencies are inferred from the claim text.