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    APPARATUS FOR MONITORING AND ADJUSTING LIQUID JETS IN INK JET PRINTERS.
    1.
    发明公开
    APPARATUS FOR MONITORING AND ADJUSTING LIQUID JETS IN INK JET PRINTERS. 失效
    装置用于调节喷雾量中的喷墨设备。

    公开(公告)号：EP0204773A4

    公开(公告)日：1989-04-26

    申请号：EP86900018

    申请日：1985-12-05

    Applicant: COMMW SCIENT IND RES ORG

    Inventor： WILLS LESLIE JAMES

    IPC: B41J2/17 ,  B41J2/015 ,  B41J2/115 ,  B41J2/175

    CPC classification number: B41J2/115

    Abstract: The production of uniform droplets (5) in ink jet printers is effected by introducing a periodic variscosity into the liquid stream (3) which leaves each jet body (2) of the printer. Effective printing with these droplets (5) requires the correct synchronism between breakoff of droplets from the liquid stream and the application of a charge to the droplets, via a charging electrode (4). To enable compensation to be made to ensure this synchronism remains correct, despite variations in the properties of the printing liquid, droplets from one printing jet (monitor jet) are monitored. Whenever the monitor jet observation shows that the synchronism has varied, a correction signal (ADV, RTD) is generated to cause the application of variscosity, or the application of charge, to be altered to compensate for the drift in synchronism. A preferred monitor jet construction includes a collector (6) for charged droplets, which receives droplets (5) from the monitor jet and periodically discharges collected liquid (7). A sense amplifier (11) is responsive to the net charge on the collector (6), and the signal from the sense amplifier (11) is used to generate the correction signal.

    INSTRUMENT FOR ON-LINE DETECTION OF COLOURED CONTAMINANTS IN WHITE FIBRE MASS
    2.
    发明公开
    INSTRUMENT FOR ON-LINE DETECTION OF COLOURED CONTAMINANTS IN WHITE FIBRE MASS 失效
    仪器有色污垢的白色纤维质量在线检测

    公开(公告)号：EP0741863A4

    公开(公告)日：1997-07-16

    申请号：EP95903217

    申请日：1994-12-08

    Applicant: COMMW SCIENT IND RES ORG

    Inventor： CHUDLEIGH PETER ,  WILLS LESLIE JAMES

    IPC: G01J3/46 ,  D01G31/00 ,  D06H3/08 ,  G01N21/89 ,  G01N21/898 ,  G01N33/36

    CPC classification number: G01N21/8983 ,  D01G31/003 ,  G01N21/8915 ,  G01N33/362

    Abstract: An instrument for detection of coloured fibres in a white fibre mass is disclosed which comprises drafting rollers (2) and (4) for reducing the fibre mass to a thin web, a pair of transparent cylindrical rollers (3) between which the web passes and an optical inspection device (6, 8) for detecting coloured fibres in the web. An upper of the rollers (3) comprises a cylindrical lens and together with a focussing lens (5), focuses light from the fibre mass to a linear diode array (6) of the inspection device (6, 8). Output signals from the diode array (6) are received by a computer (8) of the inspection device for detecting coloured fibres. Balanced illumination provided by light sources (9), reflectors (10) and diffused transmitters (11) provide balanced illumination to the web to suppress background images formed by the white fibre mass.

    DROPLET STREAM ALIGNMENT FOR JET PRINTERS.
    4.
    发明公开
    DROPLET STREAM ALIGNMENT FOR JET PRINTERS. 失效
    对齐对于JET打印设备液滴。

    公开(公告)号：EP0202268A4

    公开(公告)日：1987-12-01

    申请号：EP85905598

    申请日：1985-11-12

    Applicant: COMMW SCIENT IND RES ORG

    Inventor： WILLS LESLIE JAMES

    IPC: D06B1/02 ,  B41J2/02 ,  D06B11/00

    CPC classification number: D06B11/0059 ,  B41J2/02 ,  B41J2202/14

    Abstract: To permit accurate adjustment of the direction of projection of droplets from a droplet generating head of a jet printer, the jet body (10) is mounted for rotational movement in a cradle (13A, 42A) formed on, or on an arm member (50) extending from, a support body (13, 40). Charging electrodes (21, 46) can also be mounted on, or on an arm member (52) extending from, the support body (13, 40). The support body can be mounted on a shaft (15) in the jet printer. Arrays of droplet generating heads can be formed by supporting a plurality of heads on a single shaft (15), or by constructing a plurality of support bodies (40) from a single block of electrically insulating material.

    LIQUID STREAM DEFLECTION PRINTING METHOD AND APPARATUS.
    5.
    发明公开
    LIQUID STREAM DEFLECTION PRINTING METHOD AND APPARATUS. 失效
    方法和设备用于打印由导流液体流。

    公开(公告)号：EP0323474A4

    公开(公告)日：1989-12-18

    申请号：EP87905929

    申请日：1987-08-28

    Applicant: COMMW SCIENT IND RES ORG

    Inventor： WILLS LESLIE JAMES ,  TURVEY DAVID EDWARD

    IPC: B41J2/03 ,  B41J2/09

    CPC classification number: B41J2/03 ,  B41J2/09

    Abstract: Electrostatic deflection of portions (18) of a liquid stream (1) is used to generate lengths of liquid (called ''slugs'' of liquid) for use in jet printing apparatus. The liquid stream (1) is projected along a path alongside a linear or arcuate array of electrodes (6, 7, 8 ... 12, 13). When a voltage signal is applied sequentially to each electrode of the array at a rate which corresponds to the velocity of liquid of the stream past the electrodes, a portion (18) of the liquid is deflected out of the path of the stream and towards the array. Either the deflected portion (18) or the undeflected stream is intercepted before it reaches a surface (17) which is to be printed. The slugs of liquid may break up naturally into droplets (19) before the interception of the deflected portion (18) or the undeflected stream, or after the interception has occurred. High resolution printing with high volumes of liquid is possible using this invention.

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