Method for damping pressure peaks in a line for ink of an inkjet printer

US9840083B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Hans-Juergen Ratjen · Bad Bramstedt, DE
• Joerg Fischer · Laboe, DE

Key dates

• Filing date: Aug 15, 2016
• Grant date: Dec 12, 2017
• Expiry date: Aug 15, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2/18
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method for damping pressure peaks in an ink line of an inkjet printer includes connecting the line to a chamber divided by a diaphragm into an air-filled first space and an ink-filled second space, connecting the first space to an air-filled buffer, connecting the buffer to an air pump, a) pumping air into the first space until freeing the chamber of ink and the diaphragm rests on a chamber wall or tension in the diaphragm begins rising substantially linearly, then b) pumping air out of the first space until filling the chamber with ink and the diaphragm rests on a chamber wall or tension of the diaphragm begins rising substantially linearly, while determining the number of pump cycles, then c) pumping air into the first space while passing through substantially half of the determined pump cycles. Steps a and b may be reversed.