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公开(公告)号：DE60126893D1
公开(公告)日：2007-04-12
申请号：DE60126893
申请日：2001-11-12
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , ROLLER GEORGE J , GALAMBOS PAUL , PETER FRANK J , ZAVALDI KEVIN , GIVLER RICHARD C , HUMPHREYS RUSSEL D , SNIEGOWSKI JERFFRY J , CROWLEY JOSEPH JR
Abstract: A primary coil (130) and a secondary coil (140) are situated in the ejector, which has a resiliently mounted movable piston (110) to eject fluid through a nozzle (122). A drive signal is applied to cause current to flow in the primary coil (130). The current flow generates a magnetic field that induces a current in the secondary coil (140). Either the primary coil (130) or the secondary coil (140) is associated with the piston (110) and the other is associated with a fixed structure (120) of the ejector. As a result, a magnetic force is generated that pushes the piston (110) either toward a nozzle plate (120) so that a drop is ejected through the nozzle (122) or away from the nozzle plate so that fluid fills the chamber. When the drive signal is turned off, the piston resiliently returns to its at-rest position, thereby either refilling the ejected fluid or ejecting a drop of fluid through the nozzle (122). In other embodiments, the nozzle plate is made of a magnetic material, or is coated with or connected to a magnetic material. Switching the direction of the current changes the magnetic force between attraction and repulsion and may be used positively to move the piston in both directions.
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公开(公告)号：DE69303504D1
公开(公告)日：1996-08-14
申请号：DE69303504
申请日：1993-01-20
Applicant: XEROX CORP
Inventor： MANDEL BARRY P , BRANT WILLIAM , ROLLER GEORGE J , BRESSLER LOUIS J , FERRARA JOSEPH F , FALVO JOHN R , KAMATH VENKATESH H , KAU KARL M
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公开(公告)号：CA2077385A1
公开(公告)日：1993-05-05
申请号：CA2077385
申请日：1992-09-02
Applicant: XEROX CORP
Inventor： ROLLER GEORGE J
Abstract: An apparatus and method to deskew sheets (100) in a short paper path in an electrophotographic printing machine by differentially driving two sets of rolls so as to create a paper buckle buffer zone (102) in the sheet (100) and then differentially driving a roll set (24,25,26,27) to correct the skew while the sheet (100) is still within the nips of multiple drive roll sets (24,25,26,27,34,35,36,37). Contrary to stalled roll techniques, leading edge damage to sheets is eliminated as the deskewing rolls are initially traveling at the same velocity as the sheet.
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公开(公告)号：CA1302449C
公开(公告)日：1992-06-02
申请号：CA552053
申请日：1987-11-17
Applicant: XEROX CORP
Inventor： ROLLER GEORGE J
Abstract: A sheet feeding apparatus with a sheet support tray, a rear vacuum plenum chamber adapted to acquire the rear portion of a sheet, a front vacuum plenum chamber positioned over the front of the sheet and adapted to acquire the front portion of a sheet, a sheet transport associated with the front vacuum plenum to transport a sheet acquired in a forward direction and an air knife positioned at the rear of the stack of sheets to inject air between the trailing edge of the top sheet in a stack and the remainder of the stack. The trail edge of a sheet in a stack is separated by the air knife, acquired by the rear vacuum plenum then acquired by the front vacuum plenum and transported in a forward direction. As the trailing edge clears the rear vacuum, the rear vacuum, which together with the air knife is continuously actuated, acquires the next sheet in the stack. In this way, the speed of the sheet feeder can be very high since sheets are separated and acquired by the feeder simultaneously with transporting them off the stack. Preferably, the air knife includes preacquisition fluffer jets to initially loosen the top few sheets in the stack and lateral converging air streams to facilitate separation of the topmost sheet in the stack. The front vacuum plenum includes sheet acquisition tunnels over virtually its entire sheet contact surface in order to accommodate a wide variety of sheet sizes.
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公开(公告)号：CA1289582C
公开(公告)日：1991-09-24
申请号：CA522261
申请日：1986-11-05
Applicant: XEROX CORP
Inventor： ROLLER GEORGE J
Abstract: A top vacuum corrugation feeder employs a vacuum feedhead working in conjunction with an air knife to feed sheets from the top of a stack. The vacuum feedhead includes a vacuum plenum with a plurality of perforated feed belts entrained around it. The feed belts have a diamond shaped knurl pattern on their sheet engaging surfaces in order to obtain a higher pressure differential across the sheet material during sheet acquisition.
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Patent Agency Ranking
公开(公告)号：DE60132746T2
公开(公告)日：2008-06-19
申请号：DE60132746
申请日：2001-11-12
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , ROLLER GEORGE J , GALAMBOS PAUL , PETER FRANK J , ZAVADIL KEVIN , GIVLER RICHARD C , CROWLEY JNR JOSEPH
Abstract: A bi-directional fluid ejector (200) operates on the principle of electrostatic attraction. The fluid ejector includes a sealed dual diaphragm arrangement (210), an electrode arrangement (220,222) that is parallel and opposite to the sealed diaphragms, and a structure (240) which contains the fluid to be ejected. A diaphragm chamber (216,218) containing a relatively incompressible fluid is situated behind, and is sealed by, the diaphragms (210). At least one nozzle hole (242,244) is formed in a faceplate of the ejector over one of the diaphragms (210). A drive signal is applied to at least one electrode (220,222) of the electrode arrangement to generate an electrostatic field between the electrode (220,222) and a first one of the diaphragms (210). The first diaphragm is attracted towards the electrode (222) by an electrostatic force into a deformed shape due to the electrostatic field. Upon deforming, pressure is transmitted to a second one of the sealed diaphragms (210). The transmitted pressure and the relatively incompressible nature of the fluid contained within the sealed diaphragm chamber (218) causes the second diaphragm (210) to deflect in the opposite direction to force fluid through at least one of the at least one nozzle hole (242). After a drop is ejected, the movement is reversed, either through normal resilient restoration actions of the deformed diaphragm (210) and/or through an applied force generated by the other electrode (220).
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公开(公告)号：DE60132746D1
公开(公告)日：2008-03-27
申请号：DE60132746
申请日：2001-11-12
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , ROLLER GEORGE J , GALAMBOS PAUL , PETER FRANK J , ZAVADIL KEVIN , GIVLER RICHARD C , CROWLEY JNR JOSEPH
Abstract: A bi-directional fluid ejector (200) operates on the principle of electrostatic attraction. The fluid ejector includes a sealed dual diaphragm arrangement (210), an electrode arrangement (220,222) that is parallel and opposite to the sealed diaphragms, and a structure (240) which contains the fluid to be ejected. A diaphragm chamber (216,218) containing a relatively incompressible fluid is situated behind, and is sealed by, the diaphragms (210). At least one nozzle hole (242,244) is formed in a faceplate of the ejector over one of the diaphragms (210). A drive signal is applied to at least one electrode (220,222) of the electrode arrangement to generate an electrostatic field between the electrode (220,222) and a first one of the diaphragms (210). The first diaphragm is attracted towards the electrode (222) by an electrostatic force into a deformed shape due to the electrostatic field. Upon deforming, pressure is transmitted to a second one of the sealed diaphragms (210). The transmitted pressure and the relatively incompressible nature of the fluid contained within the sealed diaphragm chamber (218) causes the second diaphragm (210) to deflect in the opposite direction to force fluid through at least one of the at least one nozzle hole (242). After a drop is ejected, the movement is reversed, either through normal resilient restoration actions of the deformed diaphragm (210) and/or through an applied force generated by the other electrode (220).
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公开(公告)号：DE69318680T2
公开(公告)日：1998-11-26
申请号：DE69318680
申请日：1993-11-23
Applicant: XEROX CORP
Inventor： MARTIN MICHAEL J , ROLLER GEORGE J , VAN DONGEN RICHARD
Abstract: A variable sheet sized sheet feeder adapted to be reloaded while running in a dual tray mode. A dual tray sheet feeder having a sheet transport (121) to reload a stack of sheets from a holding station (104) to an active feed station (102) is provided. The dual tray design allows the holding station to be reloaded while the active tray is feeding thereby providing load while run capability. The feed tray is further provided with tray extensions (103) to allow the loading and feeding of oversized sheets within the same confines. Multiple sensors and movable stack guides (112,114) are provided to allow the transfer of the sheet stack from one tray to another and to report the status of each tray to the operator through a user interface.
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公开(公告)号：DE69015568T2
公开(公告)日：1995-07-27
申请号：DE69015568
申请日：1990-10-23
Applicant: XEROX CORP
Inventor： ROLLER GEORGE J
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公开(公告)号：DE68915515T2
公开(公告)日：1994-12-22
申请号：DE68915515
申请日：1989-11-22
Applicant: XEROX CORP
Inventor： HOLMES MAURICE F , ROLLER GEORGE J
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