Electrostatic printing aid
AssigneeEltex-Elektrostatik GmbH
InventorsErnst August Hahne, Franz Knopf, Thomas Ludwig
Life of this patent
Estimating the term…
Abstract
The invention relates to an electrostatic printing aid to assist with the transfer of printing ink that contains flammable solvents during printing with a high-voltage generator for generating an electrostatic high voltage and with a voltage device to transfer the high voltage onto a web to be printed that is in contact with a printing cylinder or plate, characterized in that the high-voltage generator is equipped with an output limiter and in that the voltage transfer device comprises slip rings, slip ring brushes, contact rollers or springs, and/or electrically conductive roller or ball bearings.
Claims9
An electrostatic printing aid to assist with the transfer of printing ink containing flammable solvents during printing, comprising:
- a high voltage generator for generating electrostatic high voltage at output terminals, including a limitation device for limiting output power to a level greater than zero, but less than the ignition power value of the solvents;
- and thus limiting energy in any spark and preventing ignition of said solvents;
- and
- a high voltage transfer device electrically connected to said output terminals for transferring said high voltage to an impression cylinder in contact with a web to be printed, said voltage transfer device including at least one of slip rings, slip ring brushes, contact rollers, contact springs and electrically conductive bearings.
Dependencies are inferred from the claim text.