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    ELECTROLYTIC PRINTING APPARATUS INCLUDING PREHEATING PRESSURE PAD THEREFOR
    23.
    发明专利
    ELECTROLYTIC PRINTING APPARATUS INCLUDING PREHEATING PRESSURE PAD THEREFOR 未知

    公开(公告)号：CA1149353A

    公开(公告)日：1983-07-05

    申请号：CA392948

    申请日：1981-12-22

    Applicant: IBM

    Inventor： PAWLETKO JOSEPH P

    IPC: B41J2/32 ,  B41J2/38 ,  B41J2/385 ,  B41M5/20 ,  G01D9/00

    Abstract: EN980018 ELECTROLYTIC PRINTING APPARATUS INCLUDING PREHEATING PRESSURE PAD THEREFOR A preheating pad and assembly for electrolytic printing apparatus is provided. The pad is adjustably mounted to the write head of the printer for movement normal to the recording medium used therein. The pad is fabricated from a ceramic chip and includes a resistive heating element that is protected by a thin bottom layer provided for that purpose. It is joined to an insulated carrier arm by a spring which serves to electrically and mechanically couple the pad and the print head. The biasing effect made possible by the spring allows the pad contact pressure with the recording medium surface to be tuned or adjusted as required. In operation, the pad's position is adjusted to force moisture deposited by an applicator on the surface of the recording medium to penetrate the recording medium's surface layer while simultaneously heating both the surface layer's constituent materials and the fluid being driven therein.

    VARIABLE RELUCTANCE LINEAR STEPPER MOTOR
    25.
    发明专利
    VARIABLE RELUCTANCE LINEAR STEPPER MOTOR 未知

    公开(公告)号：CA1003033A

    公开(公告)日：1977-01-04

    申请号：CA206208

    申请日：1974-08-02

    Applicant: IBM

    Inventor： CHAI HI D ,  PAWLETKO JOSEPH P

    IPC: H02K37/00 ,  B41J19/30 ,  H02K41/03 ,  H02P6/00 ,  H02P25/08

    Abstract: The poles of a variable reluctance type linear stepper motor are arranged in an odd plural number of pairs and each pole is provided with two windings. For each pole pair, one winding of the pole of the particular pair is connected in series-aiding relationship with one of the windings of the other pole of the pair. The other two windings of the particular pair of poles are also connected in series-aiding relationship. The series connected windings are selectively energizable in predetermined stepping sequences for single phase, double phase and alternate single and double phase energizing operational modes. As a result, relative motion is provided between the pole structure of the motor and its variable reluctance member. The directions of energization of the respective two series connected windings of each particular pole pair are in opposition with respect to each other. The energization is such that the change of direction of the flux through the poles is minimized between steps, thereby providing a concomitant reduction in electrical and/or heat losses.

    MAGNETICALLY ACTUATED AND RESTORED PRINT HAMMER
    27.
    发明专利
    MAGNETICALLY ACTUATED AND RESTORED PRINT HAMMER 未知

    公开(公告)号：CA948256A

    公开(公告)日：1974-05-28

    申请号：CA139561

    申请日：1972-04-12

    Applicant: IBM

    Inventor： CHAI HI D ,  MILLS STEPHEN H ,  PAWLETKO JOSEPH P ,  PETERS FRANCIS E ,  YOUNG CART T

    IPC: B41J9/38 ,  H01F7/14 ,  H02K33/00

    Abstract: 1331212 Selective printing INTERNATIONAL BUSINESS MACHINES CORP 28 March 1972 [15 April 1971] 14419/72 Heading B6F [Also in Division H1] Hammer impression.-A magnetically operated actuator 10, e.g. for a print hammer comprises a tripartite magnetic core 12 with upper, middle, and lower legs 13, 14, 15 of which 14 has a cylindrical surface profile 16 engaging cylindrical surface profile of armature 18 pivoted about shaft 20. This has upwardly extending arm 22 defining an air gap 2 with upper leg 13 and having a hammer face impacting a ribbon and a document 26 against a movable type member 38. A hook shaped lower end of the armature forms a polepiece 32 abutting and co-operating with lower leg 15, and a permanent magnet 11 forming upper leg 13 (replaceable by an electromagnet winding, not shown) retains armature 18 in a normal rest position, while an operating winding 34 on lower leg 15 also surrounds the polepiece of armature 18 and air gap G1. A flat radial pole face of middle leg 14 co-operates and abuts with a similar face on armature 18. Pulsing winding 34 overcomes the effect of magnet 11 to rotate armature 18 closing gap G1 and operating print hammer 24, until on pulse cessation magnet 11 restores the armature to normal. In a modification (Fig. 2, not shown) the restoring magnet has pole face defining air gap G2, and also having a curved face formed with plural spaced teeth co-operating with a similar curved and toothed portion of the armature; such that the teeth are respectively displaced into overlap in the operated position and are aligned in the normal position. A mathematical analysis of the equivalent magnetic circuit is given (Figs. 3, 4, not shown). Specification 1,331,211 is referred to.

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