Patent · US Active

Method and device for compensating for a temperature-dependent length change of the feed spindle of a printing plate exposer

US7561175B2 · kind B2 · utility

1Cited by

1References

21Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Jorg-Achim Fischer · Kiel, DE
Bernd Lassen · Mönkeberg, DE

Key dates

Filing date	Jul 13, 2006
Grant date	Jul 14, 2009
Priority date	—
Expiry date	Nov 14, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH04N2201/04794
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method and a device adapt the number of stepping motor cycles K to a temperature-dependent length change of a feed spindle in an exposer for recording printing originals. The length change is measured via a reference rod, which is disposed parallel to the feed direction of the exposure head carrier. A reference distance is disposed on the reference rod. The exposure head carrier is located on a feed spindle, which is driven by a stepping motor. A number K0 of cycles of the stepping motor per revolution of the exposure drum for a specific printing result is determined once. A corrected number Kk of stepping motor cycles for achieving the same printed result is then determined as a function of the different temperature-dependent length changes of feed spindle and reference rod.

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