Image forming apparatus including a plurality of printing heads

Details Image forming apparatus including a plurality of printing heads Image forming apparatus including a plurality of printing heads

1992-05-14

1994-07-05

Fuller, Benjamin R.

Recorders

Thermal recording

347 12, 347 15, B41J 232, B41J 2325

Patent

active

053271661

ABSTRACT:
A head unit is disposed in proximity to a platen roller around which printing paper is wound and to be movable in parallel with the axis of the platen roller. The head unit is provided with a high density head having 24 heating elements of a predetermined area and a low density head having 12 heating elements of an area four times that of the high density head. Binary image data is separated into high density head data and low density head data by a data separating circuit. The high density head forms first partial image of high resolution based on the high density head data and the low density head forms second partial image with reduced recording defects at a high speed based on the low density head data both on the printing paper.

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