Impression roller
AssigneeAlfred Doppler
InventorsAlfred Doppler, Pierre Rischmann
Life of this patent
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Abstract
An impression cylinder (6) comprises a cylinder core (71) encompassing a bearing shaft (79), and a removable sleeve (63) that is slid onto the cylinder core (71). The cylinder core (71) has an electrical contact point in the form of a double-crimpted metal ring (100) as well as a non-rotating brush (102) as a power supply. A conducting zone (631) of the slid-on sleeve (63) rests against the electrical contact point (100). The electrical contact point (100) and the power supply (102) are electrically insulated from the rest of the cylinder core (71) encompassing the bearing shaft (79) such that the rest of the cylinder core (71) is not charged during operation. The bearings (12) of the impression cylinder (6) therefore do not need to be electrically insulated with a lot of effort.
Claims18
An impression roller comprising:
- a roller core having a bearing shaft;
- and
- a removable sleeve having an inner wall, an outer wall, and a pair of end walls, slidably removable from the roller core;
- wherein the roller core comprises an electrical contact point and a power feed to said electrical contact point, and a conductive or semi-conductive region of the inner wall of the sleeve electrically contacts the electrical contact point, and wherein the electrical contact point and the power feed are electrically insulated from a remainder of the roller core comprising the bearing shaft so that the remainder of the roller core is not charged in operation.
Dependencies are inferred from the claim text.