Patent · US Expired

Electrostatic printing assist system

US5044275A · kind A · utility

6Cited by

6References

20Claims

0Family size

Assignee

Eltex Elektrostatik Gesellschaft mbH · DE

Inventors

Franz Knopf · Bühl, DE
Ernst August Hahne · Allschwil, CH
Herman Kunzig · Weil am Rhein, DE

Key dates

Filing date	Jul 19, 1989
Grant date	Sep 3, 1991
Priority date	—
Expiry date	Jul 19, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S101/37
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A counter pressure cylinder including an electrostatic printing assist system, with the counter pressure cylinder including an insulating jacket having a conductive coating thereof over which a further coating is arranged having limited conductivity. A primary winding, concentric to an electrically grounded axle or shaft of the counter pressure cylinder, is disposed beside the counter pressure cylinder in a fixed fashion with respect to the printing unit, and a secondary winding is mounted concentrically to the electrically grounded shaft of the counter pressure cylinder at one end face of the counter pressure cylinder in a fixed fashion with respect to the counter pressure cylinder. An electrical connection of the secondary winding is connected to the axle of shaft of the counter pressure cylinder and another electrical connection is connected to the coating by way of a rectifier circuit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.