公开(公告)号：DE3377273D1

公开(公告)日：1988-08-11

申请号：DE3377273

申请日：1983-11-08

Applicant: IBM

Inventor： RAKES JAMES MITCHELL ,  WILLIAMS ERROL RAY

IPC: B41J2/515 ,  B41J2/355 ,  B41J2/46 ,  G06K15/10 ,  B41J3/20

Abstract: A drive system for energising the elements of a fixed bar printer of the type in which a pair of parallel bars, of, for example, resistive material, have a series of first connections to individual bars interspersed by second connections to both bars. By driving a second connection, any one of four elements can be energised by selecting one of the adjacent first connections as a voltage source path. The drive lines which return current are fed by a driver/shift register system having a stage for each drive line. Data is fed to the driver/ shift register system serially from a plurality of memories, each of which has a capacity equal to that of the driver/shift register system. The memories are grouped in fours, so that each memory stores data for energising one of the print bar elements in each group of four defined by a drive connection and its adjacent current return connections. An addressing system controls the sequence of loading and unloading the memories. This sequence differs in accordance with whether non coded, i.e. line, data or coded, i.e. binary coded character, data is received.

公开(公告)号：DE3852291T2

公开(公告)日：1995-05-24

申请号：DE3852291

申请日：1988-12-13

Applicant: IBM

Inventor： FRANKENY RICHARD FRANCIS ,  RAKES JAMES MITCHELL

IPC: H01L21/60 ,  H01L23/495 ,  H01L23/64 ,  H01L23/498

公开(公告)号：DE3852291D1

公开(公告)日：1995-01-12

申请号：DE3852291

申请日：1988-12-13

Applicant: IBM

Inventor： FRANKENY RICHARD FRANCIS ,  RAKES JAMES MITCHELL

IPC: H01L21/60 ,  H01L23/495 ,  H01L23/64 ,  H01L23/498

公开(公告)号：DE3482315D1

公开(公告)日：1990-06-28

申请号：DE3482315

申请日：1984-12-14

Applicant: IBM

Inventor： GOFF WILLIE JR ,  RAKES JAMES MITCHELL

IPC: B41J2/425 ,  B41J2/32 ,  B41J2/395 ,  G01D15/08

公开(公告)号：DE3273241D1

公开(公告)日：1986-10-16

申请号：DE3273241

申请日：1982-12-02

Applicant: IBM

Inventor： GALETTO LOUIS VALENTINE ,  RAKES JAMES MITCHELL

IPC: B41J2/425 ,  G01D15/06 ,  G06K15/14 ,  B41J3/16

Abstract: Control circuit for selectively energizing individual wires (20) in an electroerosion printhead for forming marks on metal coated paper (4). Including a plurality of wires (20) arranged in M groups having an equal number N of wires. … It comprises M selector transistors (22) for selecting a group M of wires; N transistor switches (36) for selecting individual wires in a group M; means for generating a first current (I1 = V2/R2) from ground through the metal coated paper and each non-selected wire to make a mark; and means for generating a second current (I2 = V1/R1) bypassing the paper wire junction to avoid making a mark.

公开(公告)号：DE3173577D1

公开(公告)日：1986-03-06

申请号：DE3173577

申请日：1981-10-20

Applicant: IBM

Inventor： KULTERMAN ROBERT WAYNE ,  RAKES JAMES MITCHELL ,  SWEAT ROBERT HERRINGTON

IPC: H02P8/12 ,  H02P5/68 ,  H02P8/40 ,  H02P8/00 ,  H02P7/68 ,  B41J23/00

Abstract: In apparatus which uses a plurality of stepper motors for the actuation of various moving members therein, e.g., impact printer apparatus, an improvement is provided wherein at least one pair of stepper motors (14, 15) which operate during mutually exclusive periods share common driver means (13) which are switchable to be connected to the active stepper motor and disconnected from the dormant one. When thus connected to the active stepper motor, the driver means operate in the conventional manner to couple the windings of the active stepper motor to the particular current supply associated with that active motor in a predetermined sequence so that each winding of the active motor is energized during portions of the sequence and deenergized during other portions. The apparatus further includes switching means (16) for selectively connecting and disconnecting the drive means to the first and second stepper motors in accordance with the requirements of the apparatus driven by said stepper motors.