Patents by Inventor David William Jensen
David William Jensen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9205680Abstract: A printer includes: a media tray; a picker; a media guide for guiding the media sheets around a media feed path towards a print zone; a main drive roller assembly positioned upstream of the print zone; and an intermediary drive roller assembly positioned between the picker and the main drive roller assembly. The intermediary drive roller assembly includes: an intermediary idler roller mounted on an intermediary idler shaft; and an intermediary drive roller having a gripping surface engaged with the intermediary idler roller. An intermediary drive shaft is pivotally connected to a support shaft via a swing arm, such that the intermediary drive shaft is arcuately moveable relative to the intermediary idler shaft to provide a variable distance therebetween.Type: GrantFiled: December 3, 2014Date of Patent: December 8, 2015Assignee: Memjet Technology Ltd.Inventors: Paul Ian Mackey, David William Jensen
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Publication number: 20150197106Abstract: A printer includes: a media tray; a picker; a media guide for guiding the media sheets around a media feed path towards a print zone; a main drive roller assembly positioned upstream of the print zone; and an intermediary drive roller assembly positioned between the picker and the main drive roller assembly. The intermediary drive roller assembly includes: an intermediary idler roller mounted on an intermediary idler shaft; and an intermediary drive roller having a gripping surface engaged with the intermediary idler roller. An intermediary drive shaft is pivotally connected to a support shaft via a swing arm, such that the intermediary drive shaft is arcuately moveable relative to the intermediary idler shaft to provide a variable distance therebetween.Type: ApplicationFiled: December 3, 2014Publication date: July 16, 2015Inventors: Paul Ian Mackey, David William Jensen
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Patent number: 8783686Abstract: A printer having a media width printhead; a media path from a media input area to the printhead; a door hingedly mounted to a body of the printer which can be opened to expose the media path a media diverter mounted to the door such that when the door is in a closed position the door and the diverter define guiding portions of the path, the diverter being pivotally mounted to the door so that the diverter pivots out of the way upon opening of the door; and a displacement mechanism configured to retract the diverter with the opening movement of the door and to reposition the diverter for media guiding with the closing movement of the door.Type: GrantFiled: May 16, 2011Date of Patent: July 22, 2014Assignee: Memjet Technology Ltd.Inventors: Paul Ian Mackey, Arnold Peregrino, Dan Baterna, Jr., David William Jensen, Attila Bertok, Makomo Tsubono
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Patent number: 8567943Abstract: A media clearance mechanism for a printer, the media clearance mechanism having a door hingedly mounted to a body of the printer which can be opened to expose a media width of a media path to a media width printhead of the printer; a media diverter mounted to the door such that when the door is in a closed position the door and the diverter define guiding portions of the path, the diverter being pivotally mounted to the door so that the diverter pivots out of the way upon opening of the door; and a displacement mechanism configured to retract the diverter with the opening movement of the door and to reposition the diverter for media guiding with the closing movement of the door.Type: GrantFiled: May 16, 2011Date of Patent: October 29, 2013Assignee: Zamtec LtdInventors: Paul Ian Mackey, Arnold Peregrino, Dan Baterna, Jr., David William Jensen, Attila Bertok, Makomo Tsubono
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Patent number: 8459785Abstract: An inkjet printer that has a printhead with an array of ink ejection nozzles, an upstream ink line for connecting the printhead to an ink supply, a downstream ink line for connecting the printhead to a sump, a pump in the downstream ink line for drawing fluid out of the printhead, a gas inlet in communication with the printhead, the gas inlet being configured to open to atmosphere during a printhead de-priming operation, and close to atmosphere during a printhead priming operation and, an accumulator positioned in the upstream ink line for generating a positive pressure pulse for priming the printhead.Type: GrantFiled: February 2, 2010Date of Patent: June 11, 2013Assignee: Zamtec LtdInventors: John Douglas Peter Morgan, Kia Silverbrook, Vesa Karppinen, David John Worboys, Patrick John McAuliffe, Norman Micheal Berry, David William Jensen
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Publication number: 20120098886Abstract: A print head maintenance system for maintaining a stationary print head is disclosed. The maintenance includes both cleaning and priming In one embodiment the system includes a suction nozzle, a pump for supplying suction to the suction nozzle, and a positioning mechanism for moving the suction nozzle longitudinally past the print head. In an alternative embodiment the system further includes an ejection nozzle closely spaced to the suction nozzle, and a further pump for supplying fluid to the ejection nozzle. The positioning mechanism moves the ejection and suction nozzles longitudinally past the print head.Type: ApplicationFiled: October 25, 2010Publication date: April 26, 2012Inventors: Vesa Karppinen, Yazhuo Li, David William Jensen
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Patent number: 8075090Abstract: A method of maintaining an ink ejection face of an inkjet printhead. The method comprises the steps of: (i) flooding the ink ejection face with ink from nozzles in the printhead; and (ii) rotating a roller adjacent the face, such that flooded ink is transferred from the face onto an outer surface of the roller. The outer surface of the roller does not contact the face during rotation of the roller.Type: GrantFiled: May 12, 2010Date of Patent: December 13, 2011Assignee: Silverbrook Research Pty LtdInventors: Vesa Karppinen, David William Jensen, Kia Silverbrook
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Publication number: 20110279621Abstract: A printer having a media width printhead; a media path from a media input area to the printhead; a door hingedly mounted to a body of the printer which can be opened to expose the media path a media diverter mounted to the door such that when the door is in a closed position the door and the diverter define guiding portions of the path, the diverter being pivotally mounted to the door so that the diverter pivots out of the way upon opening of the door; and a displacement mechanism configured to retract the diverter with the opening movement of the door and to reposition the diverter for media guiding with the closing movement of the door.Type: ApplicationFiled: May 16, 2011Publication date: November 17, 2011Inventors: Paul Ian Mackey, Arnold Peregrino, Dan Baterna, JR., David William Jensen, Attila Bertok, Makomo Tsubono
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Publication number: 20110279619Abstract: A media clearance mechanism for a printer, the media clearance mechanism having a door hingedly mounted to a body of the printer which can be opened to expose a media width of a media path to a media width printhead of the printer; a media diverter mounted to the door such that when the door is in a closed position the door and the diverter define guiding portions of the path, the diverter being pivotally mounted to the door so that the diverter pivots out of the way upon opening of the door; and a displacement mechanism configured to retract the diverter with the opening movement of the door and to reposition the diverter for media guiding with the closing movement of the doorType: ApplicationFiled: May 16, 2011Publication date: November 17, 2011Inventors: Paul Ian Mackey, Arnold Peregrino, Dan Baterna, JR., David William Jensen, Attila Bertok, Makomo Tsubono
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Publication number: 20110234691Abstract: A printhead maintenance facility is provided having a storage reservoir for storing fluid ejected by a printhead, and a core movable relative to the printhead. The core has an internal structure defining the storage reservoir and having a port in fluid communication with the storage reservoir, and an external structure movable relative to the internal structure and having a drain movable into registration with the port to establish fluid communication between the drain and storage reservoir. The printhead is pagewidth and the internal and external structures are at least as long as the pagewidth.Type: ApplicationFiled: June 6, 2011Publication date: September 29, 2011Inventors: Christopher Hibbard, Geoffrey Philip Dyer, Paul Ian Mackey, Makomo Tsubono, Attila Bertok, Kia Silverbrook, Nicholas Kenneth Abraham, David William Jensen
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Publication number: 20110228017Abstract: A shut off valve is disclosed for connecting and disconnecting an ink supply to a printhead of an inkjet printer. The shut off valve has an ink inlet for connection to the ink supply and an ink outlet for connection to the printhead. A valve seat and a diaphragm biased into sealing engagement with the valve seat to disconnecting the ink supply to the printhead are also provided. The ink outlet and the ink inlet are both in fluid communication with one side of the diaphragm. Unsealing the diaphragm draws the diaphragm away from the valve seat to lower the fluid pressure in the ink inlet and the ink outlet.Type: ApplicationFiled: May 26, 2011Publication date: September 22, 2011Inventors: Geoffrey Phillip Dyer, Gregory Michael Tow, David William Jensen, Nicholas Kenneth Abraham, Kia Silverbrook
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Patent number: 7984960Abstract: A printhead maintenance facility is provided having a storage reservoir for storing fluid ejected by a printhead and a core movable relative to the printhead. The has an internal structure defining the storage reservoir and having a port in fluid communication with the storage reservoir, and an external structure movable relative to the internal structure and having a drain movable into registration with the port to establish fluid communication between the drain and storage reservoir.Type: GrantFiled: December 20, 2010Date of Patent: July 26, 2011Assignee: Silverbrook Research Pty LtdInventors: Christopher Hibbard, Geoffrey Philip Dyer, Paul Ian Mackey, Makomo Tsubono, Attila Bertok, Kia Silverbrook, Nicholas Kenneth Abraham, David William Jensen
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Patent number: 7967425Abstract: A printhead assembly with a printhead and a shut off (138) valve that has a valve body (200) defining an ink inlet (202) for connection to an ink supply, an ink outlet (67) connected to the printhead IC. A diaphragm (212) is biased into sealing engagement with the valve seat (216) to provide a fluid seal between the ink inlet and the ink outlet. An actuator (204) unseals the diaphragm from the valve seat when energized. The valve protects the ink in the ink supply from contaminants that can migrate up the ink line during shut down periods. The diaphragm is biased to a closed position and so seals the ink supply from the printhead as a default condition even in the event of a power failure. The bias is strong enough to provide the fluid seal so that the seal is not compromised when the pressure difference between the inlet and the outlet is small.Type: GrantFiled: January 31, 2010Date of Patent: June 28, 2011Assignee: Silverbrook Research Pty LtdInventors: Geoffrey Philip Dyer, Gregory Michael Tow, David William Jensen, Nicholas Kenneth Abraham, Kia Silverbrook
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Publication number: 20110090280Abstract: A printhead maintenance facility is provided having a storage reservoir for storing fluid ejected by a printhead and a core movable relative to the printhead. The has an internal structure defining the storage reservoir and having a port in fluid communication with the storage reservoir, and an external structure movable relative to the internal structure and having a drain movable into registration with the port to establish fluid communication between the drain and storage reservoir.Type: ApplicationFiled: December 20, 2010Publication date: April 21, 2011Inventors: Christopher Hibbard, Geoffrey Philip Dyer, Paul Ian Mackey, Makomo Tsubono, Attila Bertok, Kia Silverbrook, Nicholas Kenneth Abraham, David William Jensen
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Patent number: 7922279Abstract: A inkjet printhead maintenance facility that has an ink storage reservoir for holding ink ejected from the inkjet printhead during a maintenance operation and, an outlet coupling in fluid communication with the ink storage reservoir and configured for connection to a vacuum source to draw ink out of the ink storage reservoir.Type: GrantFiled: June 25, 2008Date of Patent: April 12, 2011Assignee: Silverbrook Research Pty LtdInventors: Christopher Hibbard, Geoffrey Philip Dyer, Paul Ian Mackey, Makomo Tsubono, Attila Bertok, Kia Silverbrook, Nicholas Kenneth Abraham, David William Jensen
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Patent number: 7874556Abstract: A printer for sheets of porous media supplied from a stack of such sheets. The printer has a printhead, a sheet pick-up assembly having a conduit connected to a reversible air supply, the conduit having an outlet directed towards a top sheet of the stack for directing an airstream onto the top sheet such that air penetrates the top sheet and generates an air cushion lifting the top sheet from a second sheet, the reversible air supply configured to suck air into the outlet after the top sheet has lifted from the second sheet to hold the top sheet against the outlet and a sheet feed mechanism for displacing the conduit to draw the top sheet away from the stack.Type: GrantFiled: April 14, 2009Date of Patent: January 25, 2011Assignee: Silverbrook Research Pty LtdInventor: David William Jensen
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Patent number: 7857435Abstract: A method of purging ink from an inkjet printhead is provided. The printhead is in fluid communication with an ink reservoir via an ink conduit. The method comprises compressing part of the ink conduit using a hammer mechanism, thereby purging ink from the printhead and flooding an ink ejection face of the printhead.Type: GrantFiled: July 10, 2006Date of Patent: December 28, 2010Assignee: Silverbrook Research Pty LtdInventors: Vesa Karppinen, David William Jensen, David John Worboys, Kia Silverbrook
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Patent number: 7841708Abstract: An inkjet printer that has a printhead IC with and array of ink ejection nozzles, an ink manifold for distributing ink to the printhead IC, the ink manifold having an ink inlet and an ink outlet, an accumulator, and a downstream pump in fluid communication with the ink outlet. The downstream pump is independently operable. This allows the printhead to be primed or deprimed for storage and transport and it allows the printhead IC to be cleaned by a foam formed by air forced through the ink election nozzles.Type: GrantFiled: July 31, 2006Date of Patent: November 30, 2010Assignee: Silverbrook Research Pty LtdInventors: John Douglas Peter Morgan, Kia Silverbrook, Vesa Karppinen, David John Worboys, Patrick John McAuliffe, Norman Micheal Berry, David William Jensen
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Publication number: 20100225054Abstract: A sheet feed assembly for feeding sheets of material having a known bending stiffness through a device with low friction. The sheet feeding assembly has feed path structures for defining a feed path, the feed path having a first point with a first radius of curvature, a second point with a second radius of curvature and a transition section extending between the first point and the second point. The transition section defines conforms to a shape adopted by one of the sheets of material extending from the first point where it has a curvature of the first radius, to the second point where it has a curvature of the second radius.Type: ApplicationFiled: March 3, 2009Publication date: September 9, 2010Inventor: David William Jensen
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Publication number: 20100220144Abstract: A method of maintaining an ink ejection face of an inkjet printhead. The method comprises the steps of: (i) flooding the ink ejection face with ink from nozzles in the printhead; and (ii) rotating a roller adjacent the face, such that flooded ink is transferred from the face onto an outer surface of the roller. The outer surface of the roller does not contact the face during rotation of the roller.Type: ApplicationFiled: May 12, 2010Publication date: September 2, 2010Inventors: Vesa Karppinen, David William Jensen, Kia Silverbrook