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    MAGNETIC RECORDING HEAD ARRAY WITH STAGGERED HEAD ARRANGEMENT
    4.
    发明专利
    MAGNETIC RECORDING HEAD ARRAY WITH STAGGERED HEAD ARRANGEMENT 未知

    公开(公告)号：CA1191608A

    公开(公告)日：1985-08-06

    申请号：CA426786

    申请日：1983-04-27

    Applicant: IBM

    Inventor： FRANASZEK PETER A ,  YARMCHUK EDWARD J

    IPC: B41J2/43 ,  G11B5/09 ,  G11B5/127 ,  G11B5/17 ,  G11B5/48 ,  G11B5/00

    Abstract: MAGNETIC RECORDING HEAD ARRAY FOR LONGITUDINAL MAGNETIC PRINTING WITH STAGGERED HEAD ARRANGEMENT AND CLUSTERED WIRING A magnetic recording head array for printing onto a transfer magnetic recording medium which prints magnetic material onto a medium such as paper includes staggered arrays of magnetic print heads. The heads are in diagonally staggered parallel arrays tilted away from the vertical. Each array in a group of several arrays is also staggered in the vertical direction as well as the longitudinal direction. Preferably, the heads or other bistable elements are wired in clusters with the heads or other elements in the cluster being coupled to the same actuator wires in a half-select type of wiring arrangement. The difference in the wiring of the elements will reside in the sense of the signal as applied to the elements by means such as reversing the helical winding about a core or the Like. In the manufacture of the array, the horizontal wiring lines for actuating arrays are in the form of straight lines.

    Method of determining the required spacing of writing paths on a memory medium in a recording device
    5.
    发明专利
    Method of determining the required spacing of writing paths on a memory medium in a recording device 未知

    公开(公告)号：PL177369B1

    公开(公告)日：1999-11-30

    申请号：PL32220595

    申请日：1995-03-13

    Applicant: IBM

    Inventor： CHAINER TIMOTHY J ,  SOHN WAYNE J ,  YARMCHUK EDWARD J

    IPC: G11B5/596

    Abstract: 1. The method of determining the required spacing of writing paths on a memory medium in a recording device - unique characteristics: A pass over a set of paths is recorded. The spacing of the set of paths is determined by means of the initial value of the radial position. This is followed by the generation of a return readout signal, related to the pass written in each path of the set. The return readout signals are compared to determine, whether the path spacing is correct. It if it is not, the second radial position value is determined for the writing of the following paths.

    Method of and system for generating a time pattern on a memory medium in a recording device.
    8.
    发明专利
    Method of and system for generating a time pattern on a memory medium in a recording device. 未知

    公开(公告)号：PL179098B1

    公开(公告)日：2000-07-31

    申请号：PL33008695

    申请日：1995-03-13

    Applicant: IBM

    Inventor： CHAINER TIMOTHY J ,  SOHN WAYNE J ,  YARMCHUK EDWARD J

    IPC: G11B5/596

    Abstract: 1. The method of generating a time pattern on a memory medium in a recording device. Characterized in that: The first set of passages in the first radial position is recorded on the memory medium. A time interval is determined between selected pairs of the first set of passages. The value of deviation between each indicated time interval and the predefined nominal interval is determined, so that each selected pair of the first set of passages has a corresponding deviation value. The second set of passages in the second radial position is recorded on the memory medium. Each passage of the set is recorded with the corresponding time delay with respect to the proceeding passage of the first set of passages. The time delay is determined with the nominal time interval and the function of the corresponding deviation value, so that the propagation of random errors related to the recording of the first set of passages decreases during the recording of the second set of passages. The random errors related to the correlation of the second set of passages to the corresponding passages of the first set are also reduced.

    Method of and system for recording servo-pattern on a memory medium in a recording device.
    9.
    发明专利
    Method of and system for recording servo-pattern on a memory medium in a recording device. 未知

    公开(公告)号：PL179076B1

    公开(公告)日：2000-07-31

    申请号：PL33008595

    申请日：1995-03-13

    Applicant: IBM

    Inventor： CHAINER TIMOTHY J ,  SOHN WAYNE J ,  YARMCHUK EDWARD J

    IPC: G11B5/596

    Abstract: 1. The method of recording a servo-pattern on a memory medium in a recording device equipped with an internal recording head. Characterized in that: A time pattern is generated on the memory medium by means of the recording head. The required path spacing on the memory medium is determined. The servo-pattern is recorded on the memory medium by means of the recording head. The servo-pattern is recorded in the places indicated by the time pattern and the radial position value.

    METHOD AND APPARATUS FOR MEASURING DYNAMIC TRACK MISREGISTRATION
    10.
    发明专利
    METHOD AND APPARATUS FOR MEASURING DYNAMIC TRACK MISREGISTRATION 未知

    公开(公告)号：CA1309176C

    公开(公告)日：1992-10-20

    申请号：CA580786

    申请日：1988-10-20

    Applicant: IBM

    Inventor： CHAINER TIMOTHY J ,  YARMCHUK EDWARD J

    IPC: G11B21/10 ,  G11B33/10

    Abstract: A method and apparatus for measuring dynamic head and track misregistration in, for example, a magnetic disk file. A reference signal waveform is recorded onto a track on a recording medium. The track has a center line and an off-center line parallel to the center line. The recorded reference signal waveform is read a plurality of times with the transducer centered approximately above the off-center line of the track to produce a plurality of off-track playback signal waveforms. A track misregistration signal waveform is produced by computing the difference between one off-track playback signal waveform and the average off-track playback signal waveforms. YO987-029

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