Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including type-faces movable relative to type-face-carrier
Patent
1985-06-26
1987-08-18
Wright, Jr., Ernest T.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Including type-faces movable relative to type-face-carrier
4001573, 400320, B41J 130
Patent
active
046873562
ABSTRACT:
An impact-type electronic printer uses a rotary printing wheel and a ROM to store printing-type position data for dealing with respective printing types borne by the rotary printing wheel, hammer pressure data, and the spacing data respectively matching the designated printing types together with printing-type position data. The main CPU then draws out the printing-type position data, hammer pressure data, and the spacing data in response to the input data to allow the printer to execute the printing operation using the designated printing types in accordance with these data drawn out of the ROM, thus realizing distinctly clean printed characters. The unique system embodied by the present invention makes it possible for the controller to easily read important data from the ROM. In other words, since the control system reflecting the present invention allows the ROM to effectively store the printing-type position data, hammer pressure data, and the specifying data in two words, the control system can, for example, securely read the data merely by executing the reading operations twice.
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IBM Technical Disclosure Bulletin, "Character Wheel for Low-Cost Changeable Font Printer, Branson et al, vol. 16, No. 5, Oct. 1973, p. 1515.
Matsui Hirotoshi
Sakanaka Eiichi
Tsumura Takeo
Sharp Kabushiki Kaisha
Wright, Jr. Ernest T.
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