公开(公告)号：DE2632923A1

公开(公告)日：1978-01-26

申请号：DE2632923

申请日：1976-07-22

Applicant: BASF AG

Inventor： KOHL LAMBERT ING GRAD ,  SCHNEIDER RICHARD DIPL PHYS DR ,  UHL KARL DIPL ING DR

IPC: G11B17/032 ,  G11B17/26 ,  G06K13/14 ,  G11B5/016 ,  G11B17/22

Abstract: The changing mechanism is used for flexible recording discs each contained ina rectangular sleeve, the play-back unit for the discs having means for lowering the disc onto a rotatable turntable. The recording disc can be moved almost orthogonal to the plane of movement of the disc lowering device by a transport mechanism moving forwards and backwards. An operating mechanism is positioned between the lowering device and the transport mechanism, such that the drive means for rotating the turntable is operated in dependence on the position of the disc lowering device and the position of the transport mechanism. A separate motor may be provided for the disc lowering device and be controlled in conjunction with the drive motor for the turntable.

公开(公告)号：DE2442762A1

公开(公告)日：1976-03-25

申请号：DE2442762

申请日：1974-09-06

Applicant: BASF AG

Inventor： VAETH GUENTER ,  BACHMANN RUDOLF DIPL CHEM DR ,  HARTMANN HEINRICH DIPL CHEM DR ,  HARTMANN HANS-JOERG DIPL ING D ,  SPOOR HERBERT DIPL CHEM DR ,  UHL KARL DIPL ING DR ,  LEHNER AUGUST ING GRAD ,  MOTZ HERBERT DIPL ING DR

IPC: C08G18/00 ,  C08G18/65 ,  C08G18/66 ,  C09D5/23 ,  G11B5/702 ,  G11B5/68 ,  C09D3/72

公开(公告)号：DE2439546A1

公开(公告)日：1976-02-26

申请号：DE2439546

申请日：1974-08-17

Applicant: BASF AG

Inventor： HACK JOACHIM DIPL ING ,  UHL KARL DIPL ING DR

IPC: G11B15/60 ,  G11B5/58 ,  G11B5/596 ,  G11B5/55 ,  G11B21/10

公开(公告)号：DE2365178A1

公开(公告)日：1975-07-10

申请号：DE2365178

申请日：1973-12-29

Applicant: BASF AG

Inventor： KOESTER EBERHARD DIPL PHYS DR ,  WUNSCH GERD DIPL CHEM DR ,  DEIGNER PAUL DR ,  UHL KARL DIPL ING DR ,  STUMPFI WERNER DIPL PHYS DR ,  STECK WERNER DIPL CHEM DR

IPC: G11B5/62 ,  C04B35/26 ,  C09D5/23 ,  C09D7/12 ,  H01F1/04 ,  H01F1/06 ,  H01F1/09 ,  H01F1/12

Abstract: 1496890 Surface oxidized magnetic powder BASF AG 30 Dec 1974 [29 Dec 1973] 56002/74 Heading C7U A particulate composition comprising Co 0À05 -0À96 Ni 0À95-0À04 is surface oxidized by N 2 O (optionally diluted with N 2 , CO 2 or noble gas) to form antiferromagnetic Co Ni oxide phase magnetically coupled with the ferromagnetic alloy phase. The particulate alloy may contain such amounts of Al, Cr, Fe, Mn and Zn that the magnetic exchange is not completely prevented and the treatment temperature may be up to 450‹C.

公开(公告)号：DE3010873A1

公开(公告)日：1981-10-01

申请号：DE3010873

申请日：1980-03-21

Applicant: BASF AG

Inventor： KOESTER EBERHARD DIPL PHYS DR ,  DEIGNER PAUL DIPL CHEM DR ,  SCHAEFER DIETER DIPL CHEM DR ,  UHL KARL DIPL ING DR ,  FALK ROLAND DIPL CHEM DR

IPC: G11B5/84 ,  G11B5/845

Abstract: A device for magnetically orienting the magnetizable particles of magnetic recording media in a preferred direction, which media are obtained by applying a coating of anisotropically magnetic particles finely dispersed in a solution of an organic binder system and conventional additives to a non-magnetic base, and subsequently solidifying the coating, by the action, on the still fluid coating, of the magnetic fields produced by two E-shaped electromagnets arranged symmetrically with respect to, and in mirror-image relationship to, the plane of the said coating.

公开(公告)号：DE2459541A1

公开(公告)日：1976-07-01

申请号：DE2459541

申请日：1974-12-17

Applicant: BASF AG

Inventor： KOESTER EBERHARD DIPL PHYS DR ,  DEIGNER PAUL DR ,  FALK ROLAND DIPL CHEM DR ,  UHL KARL DIPL ING DR ,  SCHAEFER DIETER DIPL CHEM DR ,  MAYER DIETER DR ,  MOTZ HERBERT DIPL ING DR ,  FELLEISEN PETER DIPL ING

IPC: B05C11/08 ,  B05D1/40 ,  G11B5/842 ,  G11B5/84 ,  B05D5/12

Abstract: The invention relates to an improved process for the manufacture of magnetic discs carrying very thin magnetic layers, by applying a fluid dispersion of magnetic materials in a binder mixture to rigid base discs by the spin-coating process. Above the side of the base disc which is to be provided with the magnetic layer, there are arranged means which produce an aerodynamic boundary layer above the discs during rotation of the latter. This avoids the formation of surface irregularities and of coating streaks during production of the layer by spin-coating.

公开(公告)号：DE2440920A1

公开(公告)日：1976-03-11

申请号：DE2440920

申请日：1974-08-27

Applicant: BASF AG

Inventor： KOESTER EBERHARD DIPL PHYS DR ,  DEIGNER PAUL DR ,  FALK ROLAND DIPL CHEM DR ,  UHL KARL DIPL ING DR ,  SCHAEFER DIETER DIPL CHEM DR

IPC: G11B5/845 ,  G11B5/68

Abstract: A device for manufacturing magnetic recording media in which the magnetic particles in the recording layer are oriented in a preferred direction, the fluid coating applied to the base being subjected to the action of a magnetic field produced in the air gaps between the spaced apart poles of two magnetic circuits, one on each side of the coated face, arranged symmetrically with respect to the plane of the coated base, the edges of the poles adjacent to the coated base terminating in screening elements shaped in such a way that the distance between the surfaces of the screening elements facing the coated base and the coated base itself increases as the screening elements extend away from the edges of the poles. A high degree of magnetic anisotropy in the recording layer can also be obtained when the magnetic circuits are at a relatively large distance from the still fluid magnetic coating.

公开(公告)号：DE2319363A1

公开(公告)日：1974-11-07

申请号：DE2319363

申请日：1973-04-17

Applicant: BASF AG

Inventor： HARTMANN HANS-JOERG DIPL ING D ,  FALK ROLAND DIPL CHEM DR ,  GAWLIK PETER DIPL ING DR ,  BALZ WERNER DIPL CHEM DR ,  UHL KARL DIPL ING DR ,  SCHAEFER DIETER DIPL CHEM DR ,  MOTZ HERBERT DIPL ING DR

IPC: C09D5/23 ,  G11B5/702 ,  G11B5/68

公开(公告)号：DE3117670A1

公开(公告)日：1982-11-25

申请号：DE3117670

申请日：1981-05-05

Applicant: BASF AG

Inventor： UHL KARL DIPL ING DR ,  FALK ROLAND DIPL CHEM DR ,  SAND RUDOLF ,  NAGEL PETER DIPL ING

IPC: G11B5/82 ,  C08L67/02 ,  G11B5/73 ,  G11B5/845 ,  G11B5/84 ,  B05D5/00 ,  G11B5/68 ,  H01T13/00

公开(公告)号：DE2716848A1

公开(公告)日：1978-10-26

申请号：DE2716848

申请日：1977-04-16

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  BROTZLER ROLAND DIPL ING ,  BERG GERHARD DIPL ING ,  UHL KARL DIPL ING DR

IPC: G11B17/032 ,  G11B17/028 ,  G11B17/035 ,  G11B17/04 ,  G11B19/20

Abstract: A drive apparatus for a magnetic disc, particularly a flexible magnetic disc in an envelope, distinguished by a compact design which is achieved by so designing and arranging the linkage between the drive's closure member and disc clamping member that they take up as little room as possible. By designing the linkage in the form of a roller and lever arrangement and arranging them substantially on the central longitudinal axis of the housing of the drive apparatus in the upper portion of the housing, the maximum amount of space is available on either side of the linking means for printed circuit boards and electronic components. In a very advantageous embodiment, the closure member, linkage and clamping member and part of the housing are assembled as a single unit which is ready for fitting. The drive apparatus of the invention can be used for any kind of flexible or rigid magnetic disc.