Recorders – Thermal recording
Patent
1989-08-03
1990-03-27
Miller, Jr., George H.
Recorders
Thermal recording
346 11, 400120, G01D 1510, B41J 320
Patent
active
049124854
ABSTRACT:
A print controlling apparatus for a thermal printer which is adapted to print with a thermal head having a plurality of heat generating elements on thermal paper or on non-thermal paper or thermal ink ribbon, is provided. The print controlling apparatus includes a processor for processing data to be printed and then outputting the data. A head control circuit devices coupled between the processor and thermal head for converting the data to be printed output from the processor to energizing signals for selectively heating the heat generating elements. The heat control circuit device includes a timing mechanism for providing at least two predetermined energizing intervals. A storage mechanism stores the present print data and at least one previous print data. A gating circuit coupled to the timing mechanism and storage mechanism produces energizing signals for each of the heat generating elements by logically combining the predetermined energizing intervals and present print data and previous print data.
REFERENCES:
patent: 4464669 (1984-08-01), Sekiya et al.
patent: 4574293 (1986-03-01), Inui et al.
patent: 4675695 (1987-06-01), Samuel
patent: 4723132 (1988-02-01), Matsuo
Miller Jr. George H.
Seiko Epson Corporation
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