公开(公告)号：HU193370B

公开(公告)日：1987-09-28

申请号：HU187385

申请日：1985-05-17

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBER WALTER ,  HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36 ,  G11B5/02 ,  G11B27/36

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.

公开(公告)号：HUT38176A

公开(公告)日：1986-04-28

申请号：HU187385

申请日：1985-05-17

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBER WALTER ,  HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36 ,  G11B5/02 ,  G11B27/36

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.

公开(公告)号：DD234518A5

公开(公告)日：1986-04-02

申请号：DD27642385

申请日：1985-05-16

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBER WALTER ,  HACK JOACHIM ,  SCHULZE-BERGER KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36 ,  G11B27/32

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.

公开(公告)号：DE3432016A1

公开(公告)日：1986-03-13

申请号：DE3432016

申请日：1984-08-31

Applicant: BASF AG

Inventor： ROLLER HERMANN ,  HACK JOACHIM ,  WOWERIES UWE ,  LEHNER AUGUST ,  GRAU WERNER DR ,  NAGEL PETER ,  FALK ROLAND DR

IPC: C08J7/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  C10M105/56 ,  C10N40/18 ,  C10N70/00 ,  G11B5/702 ,  G11B5/842

公开(公告)号：DE3418526A1

公开(公告)日：1985-11-21

申请号：DE3418526

申请日：1984-05-18

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBER WALTER ,  HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36 ,  G11B5/02 ,  G11B15/02 ,  G11B27/36

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.

公开(公告)号：DE3325555A1

公开(公告)日：1985-01-24

申请号：DE3325555

申请日：1983-07-15

Applicant: BASF AG

Inventor： LEHNER AUGUST ,  HACK JOACHIM ,  KRUCKER KARL DR ,  BALZ WERNER DR ,  ROEMER KARL HEINZ ,  RUDOLF PETER ,  FALK ROLAND DR ,  ECKERT GUENTER DR

IPC: G11B5/845 ,  C09D5/23 ,  G11B5/70 ,  G11B5/702 ,  G11B5/842 ,  G11B5/84 ,  B05D5/12 ,  C09D3/16 ,  C09D3/72 ,  G11B5/68

公开(公告)号：FR2528610A3

公开(公告)日：1983-12-16

申请号：FR8309689

申请日：1983-06-10

Applicant: BASF AG

Inventor： HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  BIRKENMEIER KLAUS

IPC: G11B5/55 ,  G11B21/02 ,  G11B21/08 ,  G11B17/00

Abstract: A positioning device, comprising a cylindrical guide element and a guide surface, is so designed that an angle of less than 90 DEG , especially of from 1 DEG to 80 DEG , is formed between an axis at right angles to the direction of movement of the guide element over the guide surface and the axis of rotation of the guide element, in the plane containing these two axes. The peripheral surface of the guide element can be grooved or convex. The novel positioning device can be used with advantage in any type of recording/playback apparatus for disk records.

公开(公告)号：IT8321933V0

公开(公告)日：1983-05-20

申请号：IT2193383

申请日：1983-05-20

Applicant: BASF AG

Inventor： HACK JOACHIM ,  BERGE KLAUS SCHULZE ,  BIRKENMEIER KLAUS

IPC: G11B5/55 ,  G11B21/02 ,  G11B21/08 ,  G11B

Abstract: A positioning device, comprising a cylindrical guide element and a guide surface, is so designed that an angle of less than 90 DEG , especially of from 1 DEG to 80 DEG , is formed between an axis at right angles to the direction of movement of the guide element over the guide surface and the axis of rotation of the guide element, in the plane containing these two axes. The peripheral surface of the guide element can be grooved or convex. The novel positioning device can be used with advantage in any type of recording/playback apparatus for disk records.

公开(公告)号：DE2861559D1

公开(公告)日：1982-03-04

申请号：DE2861559

申请日：1978-11-25

Applicant: BASF AG

Inventor： MOTZ HERBERT DR ,  LEHNER AUGUST ,  HARTMANN HEINRICH DR ,  BACHMANN RUDOLF DR ,  HARTMANN HANS-JOERG DR ,  FRISCHMANN HARALD DR ,  FALK ROLAND DR ,  HACK JOACHIM ,  VELIC MILAN DR ,  KOPKE HELMUT

IPC: C08G18/66 ,  C09D5/23 ,  G11B5/70 ,  G11B5/702

Abstract: Magnetic recording media comprising a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on a finely divided magnetic pigment dispersed in a binder which contains at least 50 percent by weight of a special polyurethane elastomer, namely a thermoplastic polyurethane which is soluble in tetrahydrofuran, is free from isocyanate groups and has been manufactured from (A) 1 mole of a hydroxyl-containing polyester having a molecular weight of from 700 to 2,500, (B) from 0.3 to 3 moles of a linear aliphatic diol of 2 to 10 carbon atoms, (C) from 0.05 to 0.4 mole of a triol of 3 to 10 carbon atoms, and (D) from 1.35 to 4.7 moles of a diisocyanate of 6 to 30 carbon atoms, the amount of NCO groups being approximately equivalent to the amount of OH groups of the sum of components (A) to (C).

公开(公告)号：CA1084621A

公开(公告)日：1980-08-26

申请号：CA248378

申请日：1976-03-17

Applicant: BASF AG

Inventor： HACK JOACHIM ,  HIMMELMANN UDO ,  RUDOLF PETER ,  SCHULZE-BERGE KLAUS ,  MEYER KARL-HEINZ

IPC: G11B23/30 ,  G11B5/016 ,  G11B5/455 ,  G11B5/55 ,  G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B21/10 ,  G11B23/36 ,  G11B33/10

Abstract: The invention relates to a magnetic disc for track adjustment and amplitude control having at least one control track with magnetic control signals, this track being arranged in the central region of the recording area, and the control signals consisting of two different signals. The invention also relates to the geometric arrangement of the control signals in the track, their number, their amplitude, their frequency and their duration.