Patent · US Active

Printing machine and method of operating the machine to avoid undesired vibrations

US8899153B2 · kind B2 · utility

0Cited by

4References

14Claims

0Family size

Assignee

Windmöller & Hölscher KG · DE

Inventors

Hermann-Josef Veismann · Issum, DE
Frank Westhof · Recke, DE
Uwe Hoewelmeyer · Ibbenbüren, DE

Key dates

Filing date	Jul 25, 2008
Grant date	Dec 2, 2014
Priority date	—
Expiry date	Mar 25, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41P2213/42
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method and an apparatus for operating a printing press determine the vibration behavior of at least one impression cylinder of the printing press, with the avoidance or suppression of undesirable vibrations such as resonant vibrations by utilizing measures in the range of the critical frequencies which trigger the vibrations. During operation of a printing press of this type, undesirable vibrations occur which cause quality impairments in relation to the printed image. The invention reduces quality impairments of this type. The problem is solved by performing targeted loading of the drive of the impression cylinder of the printing press with an exciting signal of the power output to cause vibrations of the impression cylinder, and determining critical frequencies in the resonant frequency spectrum of the impression cylinder using the vibrations which are caused.

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