Multi-resolution roofshooter printheads

Details Multi-resolution roofshooter printheads Multi-resolution roofshooter printheads

1991-10-03

1993-05-04

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, 400121, 400126, B41V 205, B41V 2205

Patent

active

052086054

ABSTRACT:
A printhead for a thermal ink jet printer, preferably a roofshooter type printer, includes at least two arrays of linear spaced apart nozzles and heating elements, each array having a different resolution to produce printed pages at a draft print using a low resolution array, at a letter quality print using a high resolution array, or a combination of both arrays to provide enhanced grey scale reproduction. The high resolution array allows for accurate reproduction at a reduced throughput while the low resolution array allows for moderate reproduction at a higher throughput. Alternatively, the two arrays could be used simultaneously to provide a fast, broad, coarse stroke and a slower, fine detail stroke.

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