1
Donald J Drake: Pagewidth thermal ink jet printhead. Xerox Corporation, Robert A Chittum, November 3, 1992: US05160945 (490 worldwide citation)

A pagewidth thermal ink jet printhead for an ink jet printer is disclosed. The printhead is the type assembled from fully functional roofshooter type printhead subunits fixedly mounted on the surface of one side of a structural bar. A passageway is formed adjacent the bar side surface containing the ...


2
Peter J Nystrom: Fabrication of reading or writing bar arrays assembled from subunits. Xerox Corporation, Robert A Chittum, June 22, 1993: US05221397 (239 worldwide citation)

A pagewidth reading or writing bar such as a full width array ink jet printhead assembled from fully functional subunits is accurately assembled on an alignment fixture and a structural bar is aligned and bonded thereto with a thermosetting epoxy. To prevent positional disturbance of the subunits pr ...


3
Robert S Karz, James F O Neill, Joseph J Daniele: Ink jet printhead with ink flow directing valves. Xerox Corporation, Robert A Chittum, January 11, 1994: US05278585 (181 worldwide citation)

A thermal ink jet printhead has a flow directing one-way valve for reducing back-flow directed forces generated by the droplet ejecting ink vapor bubbles, so that most of the bubble generated forces are used to eject ink droplets from the printhead nozzles. The one-way valve is provided by patternin ...


4
Gary A Kneezel, Thomas A Tellier, Richard V LaDonna: Thermal ink jet printhead with constant operating temperature. Xerox Corporation, Robert A Chittum, April 21, 1992: US05107276 (175 worldwide citation)

A thermal ink jet printer is disclosed which has a printhead that is maintained at a substantially constant operating temperature during printing. Printing on demand is accomplished by the ejection of ink droplets from the printhead nozzles in response to energy pulses selectively applied to heating ...


5
Donald J Drake, William G Hawkins: Large array thermal ink jet printhead. Xerox Corporation, Robert A Chittum, May 9, 1989: US04829324 (167 worldwide citation)

A large array ink jet printhead is disclosed having two basic parts, one containing an array of heating elements and addressing electrodes on the surface thereof, and the other containing the liquid ink handling system. At least the part containing the ink handling system is silicon and is assembled ...


6
William G Hawkins, Donald J Drake, Michael R Campanelli: Thermal ink jet printhead and process therefor. Xerox Corporation, Robert A Chittum, July 22, 1986: US04601777 (160 worldwide citation)

Several fabricating processes for ink jet printheads are disclosed, each printhead being composed of two parts aligned and bonded together. One part is a substantially flat substrate which contains on the surface thereof a lineal array of heating elements and addressing electrodes, and the second pa ...


7
Ivan Rezanka: Ink cartridge for an ink jet printer. Xerox Corporation, Robert A Chittum, February 18, 1986: US04571599 (149 worldwide citation)

A plurality of disposable, individually replaceable ink supply cartridges are mountable on the carriage of an ink jet printer. Each cartridge has a thermal printhead fixedly attached thereto. A constant slightly negative pressure is maintained at the nozzles of the printhead by means of a secondary ...


8
William G Hawkins: Bubble jet printing device. Xerox Corporation, Robert A Chittum, July 30, 1985: US04532530 (142 worldwide citation)

A carriage type, bubble jet ink printing system having improved bubble generating resistors that operate more efficiently and consume lower power, without sacrificing operating lifetimes. The resistor material is heavily doped polycrystalline silicon which can be formed on the same process lines wit ...


9
William G Hawkins: Ink jet printhead. Xerox Corporation, Robert A Chittum, September 27, 1988: US04774530 (138 worldwide citation)

An improved ink jet printhead is disclosed which comprises an upper and a lower substrate that are mated and bonded together with a thick insulative layer sandwiched therebetween. One surface of the upper substrate has etched therein one or more grooves and a recess which, when mated with the lower ...


10
Gerald A Domoto, Aron Sereny: Thermal ink jet printer with droplet ejection by bubble collapse. Xerox Corporation, Robert A Chittum, April 1, 1986: US04580148 (128 worldwide citation)

A thermal ink jet printhead ejects ink droplets on demand by utilizing the conservation of momentum of collapsing bubbles in a layer of liquid ink having a predetermined thickness. The printhead has an ink containing chamber with an array of individually addressable heating elements on one chamber i ...