Impression roller and use of the same

US8444538B2 · kind B2 · utility

Assignee

• ILLINOIS TOOL WORKS INC. · US

Inventors

• Franz Knopf · Bühl, DE
• Lukas Hahne · Allschwil, CH
• Thomas Litterst · Stuttgart, DE

Key dates

• Filing date: Jan 23, 2009
• Grant date: May 21, 2013
• Expiry date: May 23, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49155
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An impression roller for gravure printing for use with an electrostatic printing aid, including an axis member or a shaft, joined axially to a steel core, an electrical inner insulating layer extending radially around the core, an electrically semi-conductive outer layer adjoining the outside of the impression layer, and an electrically highly conductive conductor layer arranged between the two. The conductor layer is encapsulated in an electrically insulated exterior. The impression roller is provided with an electric or electronic encapsulated circuit electrically insulated from the outside and having two poles, which is of low resistance in normal operation when the electric current flows from its positive pole to its negative pole and is of high resistance when the flow direction is opposite. The inner pole and outer pole of the circuit are connected to the conductor layer by an inner and outer connection of the impression roller respectively.