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公开(公告)号：DE60228151D1
公开(公告)日：2008-09-25
申请号：DE60228151
申请日：2002-02-13
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , ROLLER GEORGE J , CROWLEY JOSEPH M JR , GALAMBOS PAUL , PETER FRANK , ZAVADIL KEVIN , GIVLER RICHARD , CARREIRA LEONARD M
Abstract: A fluid ejection system according to this invention operates on the principle of electrostatic or magnetic attraction. In various exemplary embodiments, the fluid ejection system includes a sealed diaphragm arrangement having at least one diaphragm portion and a diaphragm chamber defined at least partially by the at least one diaphragm portion, a nozzle hole located over the at least one diaphragm portion, an ejection chamber defined between the nozzle hole and the least one diaphragm portion and a secondary dielectric fluid reservoir containing a secondary dielectric fluid. The ejection chamber receives a primary fluid to be ejected. The secondary dielectric fluid reservoir is in fluid communication with the diaphragm chamber to supply the secondary dielectric fluid to the diaphragm chamber. In various exemplary embodiments, the secondary dielectric fluid is a liquid, a substantially incompressible fluid, and/or a high performance dielectric fluid having a dielectric constant greater than 1.
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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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Patent Agency Ranking
公开(公告)号：JP2002166550A
公开(公告)日：2002-06-11
申请号：JP2001355991
申请日：2001-11-21
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , GEORGE J LAWLER , CROWLEY JOSEPH M , GALAMBOS PAUL , PETER FRANK J , ZAVADIL KEVIN , GIVLER RICHARD
Abstract: PROBLEM TO BE SOLVED: To provide a system and a method for jetting a fluid which have improved performance characteristics. SOLUTION: A piston arrangement 110 is set movably to the inside of a fluid small chamber 120. A movement of the piston arrangement 110 towards a static face plate 130 presses a part of a fluid 140 between the piston arrangement 110 and the static face plate 130 to the outside from a nozzle hole 132 of the static face plate 130, whereby droplets or a jet of the fluid 140 is formed. A viscous force generated by a flow of the fluid along an action surface of the piston arrangement 110 moving towards the nozzle hole 132 or away from the nozzle hole 132 generates a force resisting to the movement of the piston arrangement 110. The resistance force tends to decelerate the movement of the piston arrangement 110 and to prevent the piston arrangement 110 from touching the static face plate 130. The fluid small chamber 120 is constituted of a cylinder arrangement in various embodiments.
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公开(公告)号：JP2002166549A
公开(公告)日：2002-06-11
申请号：JP2001299272
申请日：2001-09-28
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , GEORGE J LAWLER , GALAMBOS PAUL , PETER FRANK J , ZAVADIL KEVIN , GIVLER RICHARD C , CROWLEY JR JOSEPH
Abstract: PROBLEM TO BE SOLVED: To increase an electrostatic potential for ejecting a fluid inside an electrostatic fluid ejector. SOLUTION: The fluid ejector includes closed dual diaphragm structures 210 and 212, electrode structures 220 and 222 opposite in parallel to the diaphragm structures, and a structure for storing the fluid to be ejected. A diaphragm chamber 214 for storing a relatively non-compressive fluid is arranged behind diaphragms and is tightly closed by the diaphragms. At least, one nozzle hole 242 is formed to a front panel 240 of the ejector one upper than the diaphragms. A pressure is sent to the second diaphragm 212 by the deformation of the first diaphragm 210. The sent pressure and the relatively non-compressive fluid stored in the closed diaphragm chamber 214 deform the second diaphragm 212 in an opposite direction, whereby the fluid is forcibly ejected via the nozzle hole 242.
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公开(公告)号：JP2002187272A
公开(公告)日：2002-07-02
申请号：JP2001297071
申请日：2001-09-27
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , GEORGE J LAWLER , GALAMBOS PAUL , PETER FRANK J , ZAVADIL KEVIN , GIVLER RICHARD C , HUMPHREYS D RUSSELL , SNIEGOWSKI JEFFRY J , CROWLEY JR JOSEPH
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic driving system for realizing a fluid ejector insensitive to the physical properties of a fluid. SOLUTION: In the driving system for the fluid ejector 100 for discharging and replenishing the fluid, a magnetic field is generated by a coil or a magnetic material element, which is mounted inside the fluid ejector 100, and magnetic force in the magnetic field causes a change in volume capacity between a piston 110 and a face plate 120 for the purpose of discharging and replenishing the fluid.
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公开(公告)号：JP2002172779A
公开(公告)日：2002-06-18
申请号：JP2001355992
申请日：2001-11-21
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , GEORGE J LAWLER , CROWLEY JOSEPH M , GALAMBOS PAUL , PETER FRANK J , ZAVADIL KEVIN , GIVLER RICHARD , LINDENFELSER WILLIAM M
Abstract: PROBLEM TO BE SOLVED: To provide fluid ejection system and method having improved performance characteristics. SOLUTION: A fluid ejector 100 comprises a movable piston constitution 110 and a stationary face plate 130. A small fluid chamber 120 is formed between the piston constitution 110 and a substrate 150. The piston constitution 110 is fixed resiliently to the substrate 150 by means of one or more spring component 114. Ejected fluid 140 is supplied from a fluid storage unit the small fluid chamber 120 through a fluid supplement hole 152 made in the substrate 150. The stationary face plate 130 has a nozzle hole 132 for ejecting a fluid jet or a droplet. The piston constitution 110 is moved toward the stationary face plate 130 by electrostatic attraction between the piston constitution 110 and the stationary face plate 130, and a part of fluid between the piston constitution 110 and the stationary face plate 130 is pushed out from the nozzle hole 132 to form a jet or a droplet.
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公开(公告)号：JP2002166551A
公开(公告)日：2002-06-11
申请号：JP2001355993
申请日：2001-11-21
Applicant: XEROX CORP
Inventor： GOORAY ARTHUR M , GEORGE J LAWLER , CROWLEY JOSEPH M , GALAMBOS PAUL , PETER FRANK J , ZAVADIL KEVIN , GIVLER RICHARD , LINDENFELSER WILLIAM M
Abstract: PROBLEM TO BE SOLVED: To provide a method for efficiently starting an apparatus being driven electrostatically. SOLUTION: An electric drive system applies a drive signal 152 to an apparatus being started electrostatically such that a resulting electric field has a constant force. The electric drive system applies the drive signal 152 to a fluid ejector 100 being started electrostatically wherein the fluid ejector 100 comprises a piston 120, and a face plate 140 having an ejection nozzle 142. Ejected dielectric fluid is supplied between the piston 120 and the face plate 140. The drive signal 152 is applied to one of the piston 120 or the face plate 140 and causes to generate an electric fluid traversing the fluid between the piston 120 and the face plate 140. The electric field attracts the piston 120 electrostatically toward the face plate 140 and a jet or a droplet of fluid is ejected through the ejection nozzle 142.
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