公开(公告)号：DE3861509D1

公开(公告)日：1991-02-14

申请号：DE3861509

申请日：1988-08-27

Applicant: BASF AG

Inventor： BAUR REINHOLD DR ,  KLAUSMANN JUERGEN

IPC: G01B21/08 ,  G01B7/06 ,  G11B5/84

Abstract: In order to monitor the thickness of a magnetic tape for its tolerance values while the tape is being wound onto a hub of a tape cassette, the tape thickness is determined by means of a microprocessor from the number of revolutions of the hub while the tape is being wound on and from the length of tape wound on.

公开(公告)号：DE3912082A1

公开(公告)日：1990-10-18

申请号：DE3912082

申请日：1989-04-13

Applicant: BASF AG

Inventor： PLATZ HORST ,  ENGELHARDT PETER ,  SOMMERMANN FRIEDRICH DR ,  KOHL ALBERT ,  KLAUSMANN JUERGEN ,  BAUR REINHOLD DR ,  HEILMANN PETER DR ,  ROLLER HERMANN

IPC: G11B5/84 ,  G11B5/842

Abstract: The invention relates to a process for the production of magnetic recording media by dispersing pulverulent, magnetic material in a mixture of solvents, organic polymer binders, dispersants and further customary additives in a stirred ball mill, followed by aftertreatment in a ball mill filled with grinding media, application of the resulting dispersion as a layer on a substrate and subsequent solidification of the layer.

公开(公告)号：DE59006663D1

公开(公告)日：1994-09-08

申请号：DE59006663

申请日：1990-04-05

Applicant: BASF AG

Inventor： PLATZ HORST ,  ENGELHARDT PETER ,  SOMMERMANN FRIEDRICH DR ,  KOHL ALBERT ,  KLAUSMANN JUERGEN ,  BAUR REINHOLD DR ,  HEILMANN PETER DR ,  ROLLER HERMANN

IPC: G11B5/84 ,  G11B5/842

Abstract: The invention relates to a process for the production of magnetic recording media by dispersing pulverulent, magnetic material in a mixture of solvents, organic polymer binders, dispersants and further customary additives in a stirred ball mill, followed by aftertreatment in a ball mill filled with grinding media, application of the resulting dispersion as a layer on a substrate and subsequent solidification of the layer.

公开(公告)号：AT59901T

公开(公告)日：1991-01-15

申请号：AT88114009

申请日：1988-08-27

Applicant: BASF AG

Inventor： BAUR REINHOLD DR ,  KLAUSMANN JUERGEN

IPC: G01B21/08 ,  G01B7/06 ,  G11B5/84

公开(公告)号：DE3729407A1

公开(公告)日：1989-03-16

申请号：DE3729407

申请日：1987-09-03

Applicant: BASF AG

Inventor： BAUR REINHOLD DR ,  KLAUSMANN JUERGEN

IPC: G01B21/08 ,  G01B7/06 ,  G11B5/84

Abstract: In order to monitor the thickness of a magnetic tape for its tolerance values while the tape is being wound onto a hub of a tape cassette, the tape thickness is determined by means of a microprocessor from the number of revolutions of the hub while the tape is being wound on and from the length of tape wound on.

公开(公告)号：DE3741532A1

公开(公告)日：1988-08-18

申请号：DE3741532

申请日：1987-12-08

Applicant: BASF AG

Inventor： BAUR REINHOLD DR ,  KLAUSMANN JUERGEN ,  ECKENFELS ANDREAS ,  KIENTSCH ROLF

IPC: G01N21/89 ,  G01N21/95 ,  G11B5/84

Abstract: By means of a light source (2) on one side of the magnetic tape (1) to be analysed and a photocell (3) on the other side of the tape, the uncoated locations are detected. A first switching signal is formed from the photoelectric current of the photocell in dependence on one threshold value. A further switching signal is generated in dependence on another threshold value and the duration of the photoelectric current, with respect to a section of length. With the two switching signals, the tape drive can be stopped and/or a registration can be activated.