Pinch point angle variation among multiple nozzle feed channels

Details Pinch point angle variation among multiple nozzle feed channels Pinch point angle variation among multiple nozzle feed channels

1997-08-27

2000-03-28

Hartary, Joseph

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 94, B41J 205

Patent

active

06042222&

ABSTRACT:
An inkjet printhead includes multiple printing elements grouped in sets about an ink refill channel. Each printing element includes a nozzle chamber and firing resistor. Respective nozzle chambers are located at a staggered distance away from the ink refill channel. A printing element's feed channel couples its nozzle chamber to the ink refill channel. A pinch point defined by barrier walls occurs along the feed channel. Converging and diverging half angles for each barrier wall of a given printing element are the same. Such angles differ among a plurality of printing elements. The specific angle for a given printing element defines where along the feed channel the pinch point occurs. The specific angle is prescribed according to the distance from a given printing element's firing resistor to the ink refill channel. A certain angle is used for a certain resistor stagger position to provide ink refill balancing among printing elements.

REFERENCES:
patent: 4882595 (1989-11-01), Trueba et al.
patent: 5291226 (1994-03-01), Schantz et al.
patent: 5308442 (1994-05-01), Taub et al.
patent: 5387314 (1995-02-01), Baughman et al.
patent: 5519423 (1996-05-01), Moritz et al.
patent: 5563642 (1996-10-01), Keefe
patent: 5608436 (1997-03-01), Baughman

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