INKJET PRINTHEAD HAVING BUBBLE CHAMBER AND HEATER OFFSET FROM NOZZLE

In an inkjet printhead, a substantially rectangular heater element has an aspect ratio greater than about 2Ø A bubble chamber surrounds a centrally disposed heater element with a plurality of walls. A nozzle plate has an orifice for projecting ink from the bubble chamber that axially extends through...

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Bibliographic Details
Main Author POWERS, JAMES H
Format Patent
LanguageEnglish
French
Published 31.05.2011
Subjects
CORRECTION OF TYPOGRAPHICAL ERRORS
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:In an inkjet printhead, a substantially rectangular heater element has an aspect ratio greater than about 2Ø A bubble chamber surrounds a centrally disposed heater element with a plurality of walls. A nozzle plate has an orifice for projecting ink from the bubble chamber that axially extends through a thickness thereof. A center of the orifice originates a plumb line such that an offset distance exists from a center of the heater element in a range from about 6 to about 10 microns. An ink flow channel through one of the bubble chamber walls has a primary direction of ink flow substantially paralleling a length dimension of the heater element. The bubble chamber and ink flow channel may exist in the nozzle plate, a polymer barrier layer or a plurality of film layers that define a heater chip. More preferred aspect ratios include greater than about 2.5 and about 4Ø
Bibliography:Application Number: CA20042520187