Multi-pass matrix printing

Details Multi-pass matrix printing Multi-pass matrix printing

1978-10-16

1980-12-30

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

042420032

ABSTRACT:
In a printer including a record material movable past a printing station, and a print assembly capable of printing a line of characters in dot matrix format upon relative movement of the print assembly and the record material in a first direction, a method and apparatus is disclosed for printing the line of characters. In accordance with such method and apparatus, the print assembly and record material are first moved relative to one another in the first direction at a first predetermined speed. Then, the print assembly is activated to print a first predetermined number of dots of the dot matrix pattern defining each character in the line. This is followed by moving the print assembly relative to the record material a predetermined amount in a second direction perpendicular to the first direction, and effecting relative movement of the print assembly and the record material in a third direction opposite the first direction. Then, relative movement is effected between the print assembly and the record material in the first direction again, but at a second predetermined speed. This is followed by activating the print assembly to print a second predetermined number of dots of the dot matrix pattern defining each character in the line.

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IBM-TDB, vol. 20, No. 7 Dec. 1977, pp. 2528-2530.
IBM-TDB, vol. 20, No. 12, May 1978, pp. 5097-5098.

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