Patent · US Active

Register mark to be detected by a register sensor

US8161876B2 · kind B2 · utility

1Cited by

7References

5Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Wolfgang Geissler · Bad Schönborn, DE
Christopher Riegel · Bruchsal, DE
Frank Schumann · Heidelberg, DE

Key dates

Filing date	Sep 21, 2009
Grant date	Apr 24, 2012
Priority date	—
Expiry date	Mar 20, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41F33/0081
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An apparatus in a machine for processing printing material has a register sensor for register measurement between at least two color separations of a printed image printed above one another on a printing material. The register sensor registers optically deviations between the two color separations and forwards the deviations onto a computer. The register sensor contains at least one photodiode having at least two quadrants. The largely rectangular evaluation areas of the photodiode are aligned obliquely in relation to the edges of the conveyed printing material. A register mark to be detected by the register sensor has a plurality of wedge-shaped colored areas pointing in a peripheral direction of the printing material, one of the wedge-shaped colored areas being a reference color used as a reference variable and others of the wedge-shaped colored areas being register colors to be controlled. An alternative register mark has a first field for length calibration; a second field having a wedge of a reference color selected as a reference variable; and a third field containing a register color to be controlled. The may also be provided a measuring field formed as a point-symmetrical f…

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