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    1.
    发明专利
    未知

    公开(公告)号：DE2434786A1

    公开(公告)日：1975-02-27

    申请号：DE2434786

    申请日：1974-07-19

    Applicant: IBM

    Inventor： NAYLOR III HUGH EDWARD ,  WILLIAMS ROBERT ALBIN

    IPC: B41J2/125 ,  G06K15/10 ,  H04N1/034 ,  B41J3/04

    Abstract: 1434470 Electro-physical measurementposition INTERNATIONAL BUSINESS MACHINES CORP 29 July 1974 [17 Aug 1973] 33368/74 Heading G1N The invention relates to the form of electrodes used for sensing the position of electrostatically deflected charged ink-drops in an ink-jet-printer, as described in Specification 1408657, where in Fig. 4 (not shown) thereof a pair of electrodes are mounted above and below the flight path, and connected to a differential amplifying system. In the present Specification several arrangements are illustrated Figs. 2-17b (mostly not shown):- (i) the electrodes may extend along the flight path for six drop spacings and be inclined thereto Fig. 4b (flight towards viewer), (ii) Fig. 6b they may be U-shaped surrounding the flight path, (and may have electrostatic shields Fig. 7 (not shown), (iii) Fig. 10 the spacing may be staggered, (iv) They may be tapered e.g. as in Fig. 13 providing an unsymmetrical pulse, (v) One of the electrodes may be combined with the down-stream electrode (e.g. the sync sensor) to determine the velocity as described in Specification 1408657, Fig. 16 (not shown), (v) Horizontal and vertical sensor electrode pairs may be provided Figs. 17 (not shown).

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