Printhead with inlet filter for ink chamber

Details Printhead with inlet filter for ink chamber Printhead with inlet filter for ink chamber

2005-10-11

2008-12-16

Vo, Anh T. N. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S061000

Reexamination Certificate

active

07465032

ABSTRACT:
An inkjet printhead with an array of ink chambers, each having a nozzle, an actuator for ejecting ink through the nozzle, an inlet opening allowing ink to refill the chamber and a filter structure at the inlet opening; wherein,the filter structure has rows of obstructions extending transverse to the flow direction through the opening, the obstructions in each row being spaced such that they are out of registration with the obstructions in an adjacent row with respect to the flow direction. Filtering the ink as it enters the chamber removes the contaminants and bubbles but it also retards ink flow into the chamber. The present invention uses a filter structure that has rows of obstructions in the flow path. The rows are offset with respect to each other to induce turbulence. This has a minimal effect on the nozzle refill rate but the air bubbles or other contaminants are likely to be retained by the obstructions.

REFERENCES:
patent: 4149172 (1979-04-01), Heinzl et al.
patent: 5489930 (1996-02-01), Anderson
patent: 6003977 (1999-12-01), Weber et al.
patent: 6422689 (2002-07-01), Moon et al.
patent: 6672710 (2004-01-01), Silverbrook et al.
patent: 6779877 (2004-08-01), Andrews
patent: 7275817 (2007-10-01), Clark et al.
patent: 7287847 (2007-10-01), Fujii et al.
patent: 2002/0021336 (2002-02-01), Moon et al.
patent: 2004/0212663 (2004-10-01), Trueba et al.
patent: 2007/0081036 (2007-04-01), Silverbrook
patent: 2007/0081039 (2007-04-01), Silverbrook
patent: 2007/0081043 (2007-04-01), Silverbrook
patent: 0820870 (2002-04-01), None
patent: WO-95/35213 (1995-12-01), None

Affiliated with

Also associated with

Rating

Printhead with inlet filter for ink chamber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Printhead with inlet filter for ink chamber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Printhead with inlet filter for ink chamber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4038721