Variable pitch character generator for dot matrix printer

Details Variable pitch character generator for dot matrix printer Variable pitch character generator for dot matrix printer

1980-02-15

1982-07-27

Thomas, James D.

Boots, shoes, and leggings

101 9304, 101 9305, 400121, 400124, 340731, 340750, 178 15, 178 30, 354 5, 354 7, 364523, G06F 312

Patent

active

043420966

ABSTRACT:
Proportional spacing of characters, for example by a laser-xerographic printer, is achieved using a character generator memory, for example a random access memory (RAM), to store the characters of a font in a plurality of variable-size binary matrices. Each column includes at least one parity bit and at least two pitch bits or end of character (EOC) bits. After a character matrix is selected for printing: the columns are transmitted sequentially from the RAM, the bit patterns are decoded as valid and invalid EOC indication signals or as valid and invalid NON-EOC signals, and the parity of each column is checked. Also, stop printing circuitry inhibits operation of the dot matrix printer when the parity checker indicates no error but the pitch bit decoder derives an invalid EOC or NON-EOC SIGNAL.

REFERENCES:
patent: 3165045 (1965-01-01), Troll
patent: 3512139 (1970-05-01), Reynolds, Jr. et al.
patent: 3544967 (1970-12-01), Sallach et al.
patent: 3588872 (1971-06-01), Kolb et al.
patent: 3648245 (1972-03-01), Dodds, Jr. et al.
patent: 3648271 (1972-03-01), McConnell et al.
patent: 3654609 (1972-04-01), Bluethman
patent: 3729714 (1973-04-01), Heard
patent: 3877007 (1975-04-01), Fishman
patent: 3896428 (1975-07-01), Williams
patent: 3931614 (1976-01-01), Vasa et al.
patent: 3999168 (1976-12-01), Findley et al.
patent: 4000486 (1976-12-01), Schomburg
patent: 4044363 (1977-08-01), Morgan
patent: 4069511 (1978-01-01), Lelke
patent: 4079458 (1978-03-01), Rider et al.
patent: 4107786 (1978-08-01), Masaki et al.
patent: 4122520 (1978-10-01), Adamchick et al.
patent: 4141079 (1979-02-01), Grier et al.
patent: 4222643 (1980-09-01), Kitamura et al.
patent: 4242678 (1980-12-01), Somerville
patent: 4247207 (1981-01-01), Klimek et al.
patent: 4254468 (1981-03-01), Craig
patent: 4283724 (1981-08-01), Edwards
patent: 4286329 (1981-08-01), Goertzel et al.

Affiliated with

Also associated with

Rating

Variable pitch character generator for dot matrix printer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable pitch character generator for dot matrix printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable pitch character generator for dot matrix printer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2027825