Method of determining color register and/or register errors...

Details Method of determining color register and/or register errors... Method of determining color register and/or register errors...

2007-02-27

2007-02-27

Gray, David M. (Department: 2852)

Electrophotography

Document handling

Copy

C399S394000, C399S301000, C347S116000

Reexamination Certificate

active

11359916

ABSTRACT:
Color register and/or register errors are detected in a printing machine by using triangles serving as register marks. A first triangle is printed onto a sheet near the leading edge and a second triangle is printed onto a sheet near its trailing edge. The first triangle and the second triangle are detected by a sensor and a displacement of the sheet at right angles to the travel direction of the sheet and/or an angular displacement of the sheet is/are determined.

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patent: 40 14 706 (1991-11-01), None
patent: 1 048 461 (2000-11-01), None

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