Method for correcting drift of printing position and printing ap

Details Method for correcting drift of printing position and printing ap Method for correcting drift of printing position and printing ap

1990-03-16

1991-12-03

Eickholt, Eugene H.

Typewriting machines

Including selection of type-face by...

Including error detection

400279, 400322, 395105, B41J 342

Patent

active

050695568

ABSTRACT:
Both a test printing pattern during a forth direction printing and a test printing pattern during a back direction printing are displayed on a screen of a display apparatus. The test printing pattern is occurred at a predetermined detection position by counting a value of an up/down counter. A printing position drift between the forth direction printing and the back direction printing is shown on the screen. The optimum printing position drift having the smallest printing position drift amount is detected on the screen by the test printing patterns. A corrected result of the printing position drift is printed. A correction value of the printing position drift is renewed at an optimum value. The printing position drift in such as ruled lines is set at the minimum value. A high quality printing for a document data can be maintained and a high throughput for the document data can be obtained.

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patent: 5007751 (1991-04-01), Yamakawa

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