Dot-matrix printer having interchangeable line head and moving h

Details Dot-matrix printer having interchangeable line head and moving h Dot-matrix printer having interchangeable line head and moving h

1991-01-25

1993-08-03

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76PH, 400121, 400124, B61J 232, G01D 900

Patent

active

052333655

ABSTRACT:
A dot-matrix printer which operates as a line head printer and is capable of reading line head printer print data and moving head printer print data. A memory stores print data. A series of clock pulses are generated and a shift register reads a portion of the print data from the memory. Upon receipt of a pre-determined clock pulse, the shift register writes the group of print data to a first latch register in a series of latch registers. The print data in each latch register is then written to a succeeding latch register. Upon receipt of a pre-determined clock pulse and in accordance with the print data, heating elements heat specific dot elements in a group of dot elements thus printing an equivalent of one print line. The print sheet is then advanced a distance equivalent to a print line comprising the group of dot elements and the process is repeated as required. The latch registers of the disclosure may be eliminated and replaced with shift registers, thus the print data is read directly by the shift registers and therefore the operating speed is increased.

REFERENCES:
patent: 3893558 (1975-07-01), Fulton et al.
patent: 4069485 (1978-01-01), Martin
patent: 4524368 (1985-06-01), Inui et al.
patent: 4536772 (1985-08-01), Isogai
patent: 4737041 (1988-04-01), Nakayama
patent: 4738553 (1988-04-01), Uemura et al.
patent: 4786917 (1988-11-01), Hauschild et al.

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