Title:
DEVICE FOR DETECTING MARK DISPLAYING ACCURACY OF POSITION OF PRINTING PRINTED ONTO PRINTING SHEET
Document Type and Number:
Japanese Patent JPS5859847
Kind Code:
A
Abstract:
An apparatus and method for automatically checking and correcting register adjustment of a multi-color sheet-fed printing press wherein register marks are read by an ink densitometer on a remote control desk. The densitometer head is mounted on an X,Y positioning mechanism under the control of a register control computer so that the densitometer head scans cross-shaped register marks to determine both axial and peripheral register error. Preferably both right-hand and left-hand marks are used in order to pecisely determine skew or diagonal error, and the densitometer head rapidly traverses from one mark to the other mark. Preferably each register mark is made up of offset component marks of the primary colors and the positions of the marks are matched with their respective colors by the time sequence of scan path points of intersection. One color is chosen as a reference from which desired positions are calculated for the other component marks. The deviations are displayed to the operator and used as control values.
Inventors:
KURAUSU JIMEETO
Application Number:
JP15970082A
Publication Date:
April 09, 1983
Filing Date:
September 16, 1982
Export Citation:
Assignee:
ROLAND MAN DRUCKMASCH
International Classes:
B41F33/14; B41F33/00; (IPC1-7): B41F33/00
Attorney, Agent or Firm:
Toshio Yano