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    LATERALLY TRANSLATABLE ROLL APPARATUS
    2.
    发明专利
    LATERALLY TRANSLATABLE ROLL APPARATUS 未知

    公开(公告)号：CA1214501A

    公开(公告)日：1986-11-25

    申请号：CA441293

    申请日：1983-11-16

    Applicant: XEROX CORP

    Inventor： WHITAKER ANGUS H ,  MCFARLAND KEITH E ,  LLOYD WILLIAM A ,  PATRICK WILLARD J

    IPC: G03G15/01 ,  H04N1/12 ,  H04N1/193

    Abstract: A laterally translatable roll apparatus supporting a continuous web of material, albeit for supply or take-up, is designed to maintain a roll in proper alignment as the web is paid from or rewound onto the roll. The apparatus comprises a pair of frame members to rotatably support the roll therebetween. A roll drive means has a drive shaft extending to one end of the roll. An interengagable coupler means is provided on both the output end of the roll drive shaft and the one end of the roll to permit the roll to be rotatably driven by the roll drive shaft while not being directly secured thereto. Means is axially mounted at the one end of the roll and biased to move axially outward away from the roll for engagement against the output end of the drive shaft. This axially mounted biased means may comprise a spring loaded plunger mounted in one end of the roll. Lateral translation drive means is mounted on the other of the frame members with translation output means engaging but not secured to the other end of the roll. Circuit means controls the lateral translation drive means to laterally translate the lateral output means which results in lateral translation of the roll without interfering with the rotational operation of the roll via the roll drive means. The lateral translation drive means may comprise a stepper motor mounted on the other frame member with its drive shaft in axial alignment with the rotational axis of the roll to apply translatory motion to the roll via the translation output means. An application for the laterally translatable roll apparatus is lateral translation of a recording medium roll in an electrographic printing or plotter system as the recording medium is paid from or rewound onto a medium roll to properly align the medium for desired aligned movement through one or more stations comprising such a system.

    ELECTROSTATIC PRINTING MACHINE WITH IMPROVED WEB-DEVELOPING SYSTEM AND METHOD
    6.
    发明专利
    ELECTROSTATIC PRINTING MACHINE WITH IMPROVED WEB-DEVELOPING SYSTEM AND METHOD 未知

    公开(公告)号：CA1073198A

    公开(公告)日：1980-03-11

    申请号：CA246585

    申请日：1976-02-26

    Applicant: XEROX CORP

    Inventor： MCFARLAND KEITH E

    IPC: G03G15/10 ,  G03G15/11

    Abstract: An electrostatic printing machine of the type having means for applying fluid toner material to a surface of a web of print material includes a toner fountain and pump for pumping toner into the fountain from a body of toner. A vacuum channel member extends transversely of the path of movement of the web for removing toner from the surface. The vacuum channel member is formed with an upwardly directed open cavity surrounded by walls which terminate at their upper end edges in substantially a common plane for supporting the web thereacross substantially sealing the cavity when the web is so located. A flow passage is formed to lead fluid toner out of the cavity from below and flow-operated vacuum means in the form of an aspirator is disposed on the discharge side of the pump and coupled in fluid communication to the flow passage, the vacuum means being further disposed and arranged to pass a flow of toner therethrough in a manner serving to apply a suction to the cavity for withdrawing toner material from the vacuum cavity via the flow passage therein, the suction being applied to a degree responsive to the rate of passing toner through the vacuum means.

    FILM GHOST REMOVAL IN ELECTROGRAPHIC PLOTTERS BY VOLTAGE BIAS OF THE PLOTTER FOUNTAIN OR FILM EDGE-STRIP
    7.
    发明专利
    FILM GHOST REMOVAL IN ELECTROGRAPHIC PLOTTERS BY VOLTAGE BIAS OF THE PLOTTER FOUNTAIN OR FILM EDGE-STRIP 未知

    公开(公告)号：CA2031232C

    公开(公告)日：1996-01-09

    申请号：CA2031232

    申请日：1990-11-30

    Applicant: XEROX CORP

    Inventor： HANSEN LORIN K ,  GABLE RICHARD J ,  LARA EDWARDO D ,  LLOYD WILLIAM A ,  MCFARLAND KEITH E ,  SAYRE JACK H ,  WHITE STEPHEN D

    IPC: G03G15/00 ,  G03G15/05 ,  H04N1/29 ,  G03G21/00

    Abstract: A preferred embodiment of the present invention is directed to a removal of a ghost image created during a processing of a film laminate medium by an electrographic plotter. A recording of an image on the film medium induces a ghosting potential over a developing station. The ghosting potential causes a spurious image to be developed by the developing station. The recorded image is created by depositing a charge on a dielectric layer of the film. A relationship exists between the deposited charge and the ghosting potential. By use of information known to the system, the ghosting potential may be estimated and reduced. A preferred method estimates the magnitude of the ghosting potential by use of the relationship between deposited charge and ghosting potential. A counteracting potential is applied to the system to reduce the ghosting potential over the developing station. The reduction of the ghosting potential substantially removes the ghost image created during the processing of the film laminate.

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