Incremental printing of symbolic information – Ink jet – Medium and processing means
Patent
1993-08-24
1996-04-23
Hartary, Joseph W.
Incremental printing of symbolic information
Ink jet
Medium and processing means
347 43, 219216, B41J 201, B41J 221
Patent
active
055108229
ABSTRACT:
A thermal ink-jet printer (10) including a paper advancing mechanism (14) and a pen traversing mechanism (18) and a pen (20) is disclosed. The pen (20) includes a nozzle plate portion (22) which includes irregularly spaced columns of nozzles (24) for staggering application of inks onto the print medium (16) such that a drying time is provided between applications of differing inks to adjacent areas. The printer (10) further includes a platen heater assembly (68) as a means of fixing and drying the ink on the print medium (16), and a vacuum fan (62) and an associated plurality of platen vacuum holes (74) as a means of holding the print medium (16) in close contact with the heater plate assembly (68), thus increasing efficiency of heat transfer. The printer (10) is characterized in that it is capable of producing, at relatively high speeds on ordinary untreated paper or other print medium, a highly defined image relatively free from the problems of color bleeding, feathering, ink coalescence, and paper cockle normally associated with ink-jet printers. The primary usage of the printer (10) is in computer generated data printout applications.
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Nguyen Michael A.
Vincent Kent D.
Hartary Joseph W.
Hewlett--Packard Company
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