Dot-matrix type printing system

Incremental printing of symbolic information – Ink jet – Ejector mechanism

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B41J 2145

Patent

active

057741433

ABSTRACT:
The printing elements 200 are arranged with the basic pitch P of 1/180 inch. The sheet feeding mechanism 24 can feed the sheet of paper 23 at the sheet feed pitch F of 1/160 inch. The sheet feeding mechanism 24 is controlled to feed the sheet of paper 23 by a distance of R/160 inches, and a desired data is allotted to a S-th printing element 200. When the values R and S satisfy the following equation (1), the S-th printing element can print a dot at a position n/1440 inches away from an initial position at which the first printing element is initially located. ##EQU1## Thus, the printing system can print dots at a dot density of 1/1440 inch which is the highest common divisor of the values 1/160 inch and 1/180inch.

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