Paper feed control for a dot-line printer

Details Paper feed control for a dot-line printer Paper feed control for a dot-line printer

1987-11-23

1989-12-26

Wiecking, David A.

Printing

Selective or progressive

Bed and platen machines

400323, 400568, B41J 312

Patent

active

048890529

ABSTRACT:
A dot-line printer has a hammer bank carrying a plurality of printing hammers arranged in groups, each group having a predetermined number of printing hammers displaced from one another by predetermined numbers of dot-lines in the direction of paper feed. A shuttle mechanism causes the hammer bank to undergo reciprocating shuttle movements with a reversing period between successive shuttle movements. A character line, covering a predetermined number of dot-lines, is printed over a plurality of shuttle movements, a paper feed mechanism causing the paper to move a predetermined number of dot-lines in the reversing period between shuttle movements. A number of blank dot-lines separate a printed character line from the beginning of the first dot-line of the next character line to be printed. A control mechanism sets the reversing period between successive shuttle movements to be longer than the paper feed time to move the paper to the first dot-line to be printed after the preceding character line has been printed and causes the paper feed to the first dot-line of the next character line to be printed to occur entirely in the reversing period.

REFERENCES:
patent: 4387642 (1983-06-01), Bringhurst et al.
patent: 4599007 (1986-07-01), Khorsand
"Print Hammer Mounting Arrangment for a Matrix Printer", E. G. Lean et al; IBM Tech. Disc. Bull., vol. 27, No. 8, Jul. 1984, pp. 1099-1100.

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