Linefeed calibration using an integrated optical sensor

Details Linefeed calibration using an integrated optical sensor Linefeed calibration using an integrated optical sensor

1998-12-03

2000-12-12

Hilten, John S.

Printing

Processes

Condition responsive

101483, 347 5, 347 16, 400282, 400582, B41L 3900

Patent

active

061583448

ABSTRACT:
A method of calibrating a media advance mechanism in a printer utilizes an optical sensor of the printer to detect printed marks on a calibration sheet. The marks on the calibration sheet are spaced at actual longitudinal intervals. The calibration sheet is advanced longitudinally past the printhead carriage, and the calibration marks are detected with the optical sensor. The printer determines the apparent or measured longitudinal intervals and compares them to the actual intervals to determine errors in positioning the calibration sheet.

REFERENCES:
patent: 4485982 (1984-12-01), St. John et al.
patent: 4734868 (1988-03-01), DeLacy
patent: 4916638 (1990-04-01), Haselby et al.
patent: 5806430 (1998-09-01), Rodi

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