Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – Carriage-feed mechanism
Patent
1995-04-17
1997-07-08
Burr, Edgar S.
Typewriting machines
Carriage or carriage-moving or movement-regulating mechanism
Carriage-feed mechanism
400279, 400568, B41J 1930
Patent
active
056453590
ABSTRACT:
A serial printer is composed of a paper feeding mechanism for feeding paper, a print head having a plurality of dot printing elements arranged in a feeding direction of the paper, a head moving mechanism for moving the print head in a direction substantially perpendicular to the paper feeding direction to scan the paper, a raster buffer for storing bit map pattern data for a scanning area of the print head, and a control section for causing the print head to print a dot image corresponding to the bit map pattern data stored in the raster buffer while moving the print head in a printing direction and reversing the printing direction after printing the dot image. Particularly, the control section includes a CPU for performing a process of detecting that printing data externally supplied is constructed in a text form containing character codes, determining a coordinate position for each character code, selecting each group of character codes whose printing area is set within the scanning area of the print head, producing bit map pattern data in the raster buffer by converting the character codes of a selected group into a dot data form, and driving the dot printing elements according to the bit map pattern data while moving the print head, and feeding the paper to set the printing area to the scanning area of the print head.
REFERENCES:
patent: 4999646 (1991-03-01), Trask
patent: 5044796 (1991-09-01), Lund
Goto Koji
Oda Akira
Burr Edgar S.
Kabushiki Kaisha TEC
Kelley Steven S.
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