Method and apparatus for detecting print-termination in line pri

Details Method and apparatus for detecting print-termination in line pri Method and apparatus for detecting print-termination in line pri

1990-06-19

1992-09-29

Wiecking, David A.

Printing

Selective or progressive

Bed and platen machines

B41J 120

Patent

active

051506483

ABSTRACT:
A print-termination detecting apparatus and method for a line printer with which it is possible to accurately predict the termination of printing so as to shorten the paper feeding cycle and to thereby make it possible to attain higher speed printing. Based on the fact that the termination of printing can be predictively detected X columns earlier by anticipatory comparison with respect to a character which will come X columns after a currently opposite character, a pre-scanning flag for storing the result of the anticipatory comparison is provided wherein, when all the columns of the pre-scanning flag indicate "no print data", it is recognized that printing has been terminated, whereupon the paper feeding cycle is started. X is determined taking into consideration the dead time in the paper-feeding system including a paper-feeding motor, the time required for comparison/collation, and the flight time of the respective print hammer.

REFERENCES:
Abstract of 55-154,675.

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