B - Operations – Transporting – 41 – J
Patent
B - Operations, Transporting
41
J
B41J 2/00 (2006.01) B41J 29/00 (2006.01) B41J 29/393 (2006.01)
Patent
CA 2289182
Apparatus and method for monitoring print quality produced by a digital printing mechanism in real-time. Print quality is measured by: generating a background reflectance signal representative of the reflectance of said substrate; scanning the image to generate a post-print reflectance signal; comparing said reflectance signal with said post-print reflectance signal; and, if said post- print reflectance signal is greater than a predetermined fraction of said reflectance signal, generating an output signal indicative of poor quality. In one embodiment of the invention, the output signal is also generated if the post-print reflectance signal is less than a predetermined minimum value. In another embodiment of the invention, the print mechanism is comprised in a postage metering system and the output signal inhibits further printing. In another embodiment of the invention, the background reflectance signal is compared with the post-print reflectance signal to classify the post-print reflectance signal as being satisfactory, unsatisfactory, or doubtful; and if the post-print reflectance signal is doubtful, printing a test pattern and waiting for an operator response; and then if the operator response indicates said test pattern is acceptable, accepting the indicia; and if the operator response indicates the test pattern is unacceptable, rejecting the indicia; and if the operator response indicates the test pattern is acceptable, adjusting the comparison to classify a greater portion of post- print reflectance signals as satisfactory; and if the operator response indicates the test pattern is unacceptable, adjusting the comparison to classify a greater portion of post-print reflectance signals as unsatisfactory.
Pitney Bowes Inc.
Realotto Limited Liability Company
Sim & Mcburney
LandOfFree
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