Dot-matrix printer with font cartridge unit

Details Dot-matrix printer with font cartridge unit Dot-matrix printer with font cartridge unit

1985-08-30

1987-04-28

Sewell, Paul T.

Typewriting machines

Including control of format and selection of type-face by...

400 70, 400121, 400692, 364519, 365 63, B41J 548

Patent

active

046609989

ABSTRACT:
A dot-matrix printer of the invention uses a font cartridge unit storing in advance character pattern data corresponding to characters other than standard characters. The font cartridge unit comprises a ROM or RAM storing character pattern data in a storage area in units of pages. A CPU sets a given page address in a page address register in the font cartridge unit in the case of dot printing of characters other than standard characters. The CPU reads out desired character pattern data from the storage area of the ROM or RAM corresponding to the preset page address, and stores the readout data in a work memory. A printing mechanism controller controls a printing mechanism including a print head in accordance with the character pattern data stored in the work memory so as to execute dot printng of, e.g., high-density characters other than standard characters.

REFERENCES:
patent: 4159541 (1979-06-01), Ward
patent: 4388010 (1983-06-01), Mott
patent: 4400791 (1983-08-01), Kitado
patent: 4452136 (1984-06-01), Boynton
patent: 4458333 (1984-07-01), Smith

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