Thermal ink jet pen body construction having improved ink storage and feed capability
Ink jet pen having improved ink storage and distribution capabilities
Thermal ink jet pen having a feedtube with improved sizing and operational with a minimum of depriming
Ink jet printer with self-regulating refilling system
Refillable ink jet print system
Non-clogging cap and service station for ink-jet printheads
Ink jet recording unit having an ink tank section containing porous material and a recording head section
Ink jet head cartridge Patent #: 5216450
ApplicationNo. 279079 filed on 07/22/1994
US Classes:347/87With integral ejector
ExaminersPrimary: Le, N.
Attorney, Agent or Firm
Foreign Patent References
International ClassB41J 002/175
Foreign Application Priority Data1989-10-20 JP
AbstractAn ink jet head cartridge includes a recording head for ejecting ink; an ink container for containing the ink to be supplied to the recording head; an ink supply port for supplying the ink from the container to the head; a porous ink absorbing material disposed in the container and having a ring shape with a central opening; and an engaging portion engaging with the central opening wherein the absorbing material has a higher density proximate to the supply port than proximate to the engaging portion.