US 7,077,509 B2
Inkjet printhead heater chip with asymmetric ink viasGeneral
US 7,077,509 B2
Inkjet printhead heater chip with asymmetric ink vias
Tech Center:
2800 Semiconductors/Memory, Circuits/Measuring and Testing, Optics/Photocopying, Printing/Measuring and Testing
Examiner:
Juanita D. Stephens
Art Unit:
2853 Printing/Measuring and Testing
Agent:
Inventors:
George Keith Parish; Kristi Maggard Rowe
Assignee:
Priority:
12/30/02
Filed:
09/22/04
Granted:
07/18/06
Expiration:
12/30/22
Abstract
An inkjet printhead heater chip has an ink via asymmetrically arranged in a reciprocating direction of inkjet printhead movement. The ink via has two sides and a longitudinal extent substantially parallel to a print medium advance direction. A column of fluid firing elements exists exclusively along a single side of the two sides. The heater chip and ink via each have a centroid and neither resides coincidentally with one another. Preferably, the heater chip centroid resides externally to a boundary of the ink via. In other aspects, the column of fluid firing elements can be a sole column or plural and may be centered in the reciprocating direction. The ink via can be a sole via or plural. The heater chip can be rectangular and the ink vias can be closer to either the long or short ends thereof. Inkjet printers for housing the printheads are also disclosed.
Cooperative Patent Classification (CPC)
B41B41J2/14145B41J