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    3.
    发明专利
    未知

    公开(公告)号：DE3775884D1

    公开(公告)日：1992-02-20

    申请号：DE3775884

    申请日：1987-10-16

    Applicant: IBM

    Inventor： ANDERSON LAWRENCE LEE ,  HELINSKI EDWARD FRANK ,  MEIER JOHANN HANS ,  ZABLE JACK LOUIS

    IPC: B41J11/02 ,  B41J9/10 ,  B41J9/48 ,  B41J9/54 ,  B41J11/08 ,  B41J9/26

    Abstract: A platen assembly for an impact printer comprises the combination of an impact transducer (28) between the backup plate (23) and the type band (11) of a printer and an impact isolator (29) interposed between the transducer and the type band. The transducer comprises a strip of force sensitive material. The strip extends over a plurality of print positions. Electrode means in contact with the surfaces of the force sensitive material form discrete impact zones aligned with the print hammers. One of the electrode means is a continuous conductive strip on one side of the force sensitive strip. Plural conductive pads on the other side of the strip form the discrete impact zones. The transducer element can be a foil using PVF2 with etched conductive patterns forming the electrodes.

    4.
    发明专利
    未知

    公开(公告)号：DE2554457A1

    公开(公告)日：1976-07-01

    申请号：DE2554457

    申请日：1975-12-04

    Applicant: IBM

    Inventor： HELINSKI EDWARD FRANK ,  ZABLE JACK LOUIS

    IPC: B41J2/075 ,  B41J2/02 ,  B41J2/035 ,  B41J2/10 ,  G06K15/10 ,  G06K15/22 ,  H04N1/034 ,  B41J3/04

    Abstract: In an ink jet recorder, a ferrofluid ink is supplied under pressure to a nozzle to form a continuous ink jet stream. The jet stream is subjected to two or more perturbation forces out-of-phase with each other causing the satellites and drops to fast merge. Plural electromagnetic transducers are located at spaced locations along the stream and energized to produce out-of-phase perturbations on the stream. The spacing of the transducers is differentially related to spacing of varicosities or ink drops produced by first transducer. The out-of-phase perturbations can also be obtained using an electromechanical transducer and electromagnetic transducers located out-of-phase or energized out-of-phase with each other.

    9.
    发明专利
    未知

    公开(公告)号：CH595994A5

    公开(公告)日：1978-02-28

    申请号：CH1509975

    申请日：1975-11-21

    Applicant: IBM

    Inventor： HELINSKI EDWARD FRANK ,  LEE HO CHONG ,  ZABLE JACK LOUIS

    IPC: B41J2/075 ,  B41J2/12 ,  G06K15/10 ,  H04N1/034 ,  B41J3/04

    Abstract: A continuous jet stream of a ferrofluid ink is broken into individual drops by an asymmetrical perturbation force applied to the stream. The ink, as it exits from an orifice under pressure, is excited by an electromagnetic transducer energized with an asymmetrical excitation signal having a fundamental and higher harmonics. An asymmetrical excitation signal, such as a sawtooth, having a substantial second and/or third harmonics content which produce an excitation signal with different rise and fall times can form a stream of drops free of satellites. Asymmetry of magnetic field forces can be produced with single stage or multi-stage transducers located at spaced positions along the stream. Asymmetry can also be produced using an electromagnetic transducer having a non-uniform gap.

    10.
    发明专利
    未知

    公开(公告)号：CH595993A5

    公开(公告)日：1978-02-28

    申请号：CH1509875

    申请日：1975-11-21

    Applicant: IBM

    Inventor： HELSINKI EDWARD FRANK ,  ZABLE JACK LOUIS

    IPC: B41J2/075 ,  B41J2/02 ,  B41J2/035 ,  B41J2/10 ,  G06K15/10 ,  G06K15/22 ,  H04N1/034 ,  B41J3/04 ,  G06K15/02 ,  H04N1/24

    Abstract: In an ink jet recorder, a ferrofluid ink is supplied under pressure to a nozzle to form a continuous ink jet stream. The jet stream is subjected to two or more perturbation forces out-of-phase with each other causing the satellites and drops to fast merge. Plural electromagnetic transducers are located at spaced locations along the stream and energized to produce out-of-phase perturbations on the stream. The spacing of the transducers is differentially related to spacing of varicosities or ink drops produced by first transducer. The out-of-phase perturbations can also be obtained using an electromechanical transducer and electromagnetic transducers located out-of-phase or energized out-of-phase with each other.

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