Print head, and print pre-heat method and apparatus using the sa

Details Print head, and print pre-heat method and apparatus using the sa Print head, and print pre-heat method and apparatus using the sa

1995-10-26

1999-02-02

Hecker, Stuart N.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Having driving circuitry for recording means

347 13, 347 60, 347186, B41J 2355, B41J 2938

Patent

active

058672001

ABSTRACT:
A print head of this invention has a plurality of heater boards, and each heater board has a plurality of heating resistors, driver circuits corresponding to the heating resistors, one shiftregister for inputting serial data, a data latch circuit for latching print data input from the shift register, a pre-heat data latch circuit for latching selection data of selecting one or several of pre-heat signals input from the shift register, and a pre-heat selection circuit for selecting one or a plurality of pre-heat signals in accordance with the selection data latched in the pre-heat data latch circuit. In a print operation, one or several of the plurality of input pre-heat signals are selected to pre-heat the heating resistors, and when a main heat signal is input thereafter, the heating resistors are driven in accordance with the print data latched by the data latch circuit, thus performing the print operation.

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