Apparatus for reducing particulate in an ink jet printer

Details Apparatus for reducing particulate in an ink jet printer Apparatus for reducing particulate in an ink jet printer

2006-08-10

2009-08-11

Do, An H (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S029000

Reexamination Certificate

active

07571996

ABSTRACT:
An apparatus in an ink jet printer reduces the risk of clogged nozzles in ink jet printing machines by providing a negative pressure area in the vicinity of a localized high shear stress region that is located about a print head perimeter. The apparatus includes a print head protector substantially surrounds a print head, the protector having a first substantially continuous slot along a portion of a length of the protector that is upstream of the print head and a second substantially continuous slot along a portion of a length of the protector that is upstream of the first substantially continuous slot, an inlet in fluid communication with the first substantially continuous slot, the inlet enables a positive pressure air supply to be coupled to the first substantially continuous slot so air entering the inlet flows through the first slot to displace debris from media approaching the print head, and an outlet in fluid communication with the second substantially continuous slot, the outlet enables a negative pressure source to be coupled to the second substantially continuous slot so displaced debris flows into the second substantially continuous slot and out through the outlet for removal from the ink printing machine in which the print head is located.

REFERENCES:
patent: 4591869 (1986-05-01), Katerberg et al.
patent: 5519420 (1996-05-01), Zorn et al.
patent: 6068364 (2000-05-01), Kusumi et al.
patent: 6890053 (2005-05-01), Myhill et al.
patent: 2003/0016267 (2003-01-01), Green
patent: 2005/0099451 (2005-05-01), Kuester et al.
patent: 2005/0157119 (2005-07-01), Silverbrook

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