Control system for high speed printer

Details Control system for high speed printer Control system for high speed printer

1975-05-07

1976-02-17

Burr, Edgar S.

Textiles: fiber preparation

3401725, B41J 2500

Patent

active

039386414

ABSTRACT:
An all-electronic control system for a high-speed column sequential dot matrix printer, using a permutation code signal of given pulse rate p comprising a series of individual code words each including a fixed number of data pulses preceded by a start pulse; the control system comprises a plural-stage FIFO storage register with a capacity of at least three, and preferably four or more, code words, for storing input data, as during a carriage return of the printer. A print timing oscillator having a frequency f is coupled to countdown means that develops a normal print rate signal f
and a fast print rate signal f/m, where f >>p and n>m. A print rate selector selects one of the print rate signals, to control the printing speed of the printer, depending on whether a code word is stored in a given stage of the storage register.

REFERENCES:
patent: 3353648 (1967-11-01), Amada et al.
patent: 3363238 (1968-01-01), Clark et al.
patent: 3668652 (1972-06-01), Zahn
patent: 3670861 (1972-06-01), Zenner et al.
patent: 3703949 (1972-11-01), Howard et al.
patent: 3719781 (1973-03-01), Fulton et al.
patent: 3761880 (1973-09-01), Kritz et al.

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