Patent ID: 7207671
Filing Date: 2007-04-24
Classification: B41J

Abstract:
1. An ink jet printhead enclosure comprising: a. a body; b. a load supportable moveable lid having an opening and being disposed on the body; c. a chamber disposed within the body below the movable lid and having at least one side; d. continuous web media disposed in the chamber; e. at least one ink jet printhead located above the continuous web media within the chamber; f. a high efficiency air filter with a fan disposed in the opening of the moveable lid above the chamber and adapted to bathe the ink jet printhead and the continuous web media in clean filtered air within the chamber, wherein the fan creates a positive air pressure in the chamber by blowing clean filtered air into the chamber; and g. an air flow restriction device disposed in the side below the continuous web media, wherein the air flow restriction device comprises a flow orifice adequate to permit air flow from the chamber while controlling the positive air pressure within the chamber when the fan and filter flood the chamber with clean filtered air, in order to thereby reduce particle contamination in the chamber from air external to the chamber by a factor of at least ten.