Title:
DEFECT DONOR DETECTING METHOD
Document Type and Number:
Japanese Patent JP3200237
Kind Code:
B2
Abstract:
PURPOSE: To prevent the irregularity of printing density and to enhance printing quality by detecting the opaque mark applied to a donor having a defect in a donor web producing process in a printing process and sending the part thereof as it is.
CONSTITUTION: The auxiliary red LED 24a provided on the central line of a donor shows zero transmission at a time of the reading of an opaque mark 15 in the yellow patch Y of the donor having a defect. That is, transmitted light is not detected in an auxiliary red sensor 24. A regular color patch detector used in order to detect patches of respective colors consists of a red sensor 18, a green sensor 20 and a blue sensor 22 and is arranged at a place shifted from the central line of a donor web.
Inventors:
Robert Jay Matousek
Application Number:
JP13818693A
Publication Date:
August 20, 2001
Filing Date:
June 10, 1993
Export Citation:
Assignee:
Eastman Kodak Company
International Classes:
B41J2/525; B41J2/325; B41J17/36; B41J29/46; B41J35/16; B41M5/382; G01N21/86; (IPC1-7): B41J17/36; B41J35/16
Domestic Patent References:
| JP3124484A | ||||
| JP3112679A | ||||
| JP60154093A |
Attorney, Agent or Firm:
Kenji Yoshida (2 outside)