Thin film resistor type thermal ink pen using a form storage ink supply
September 18, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3441950 Ink jet printing head Liquid jet device with cleaning protective means Disposable cartridge for ink drop printer Ink supply system for ink jet printers Multiple nozzle ink jet print head Small printer Disposable ink jet head Ink liquid reservoir in an ink jet system printer Liquid-jetting head InventorsApplicationNo. 409486 filed on 09/18/1989US Classes:347/87, With integral ejector347/43Color typeExaminersPrimary: Hartary, Joseph W.International ClassesB41J 002/05B41J 002/21 AbstractA disposable thin film resistor type thermal ink jet pen including a housing having a support surface at one end thereof with openings for passing ink to an adjacent thin film resistor type thermal ink jet printhead. The printhead is mounted on the support surface and has ink ejection orifii therein communicating with openings in the support surface. A porous foam material is mounted within the housing and is operative to receive and retain a supply of ink for feeding the ink by capillary action through the openings in the support surface and to the ink jet printhead. The foam ink storage material is compressed in one or more compartments of the housing to reduce the pore size therein and reduce the foam thickness while increasing its density. By this process, the capillary force of the foam is increased and thereby renders this ink storage medium especially well-suited for feeding ink on demand to a thin film resistor type of thermal ink jet printhead.Field of SearchIncluding capillary material-retainer filling reservoir | |
