公开(公告)号：DE2512456A1

公开(公告)日：1976-10-07

申请号：DE2512456

申请日：1975-03-21

Applicant: BASF AG

Inventor： SOMMER FRANZ ING GRAD ,  UHL KARL DIPL ING DR ,  LOESER WERNER DIPL CHEM DR ,  FELLEISEN PETER DIPL ING ,  HAMMERSCHMITT PETER DIPL ING ,  SCHNEIDER RICHARD DIPL PHYS DR

IPC: G11B5/716 ,  G11B5/68 ,  B32B15/00 ,  H01F10/00

Abstract: The disc type magnetic data record carrier consists of a carrier material (S), a magnetic film (1) for the pick-up of servo information, a non-magnetic intermediate film (Z) and a second magnetic film (2) for the pick-up of data-information. The carrier material (S) is typically provided on both sides with foils. The film strength of each magnetic film is typically 0.06 to 0.6 um and the non-magnetic film has a film strength of 10 to 30 times that of the weaker films. The ratio of the coercive force between the first and second metal magnetic films is between 0.5 and 2.0. The surface of the second magnetic film is provided with a protective film.

公开(公告)号：DE2713194A1

公开(公告)日：1978-10-05

申请号：DE2713194

申请日：1977-03-25

Applicant: BASF AG

Inventor： FELLEISEN PETER DIPL ING ,  GROSSHANS PETER ,  HAMMERSCHMITT PETER DIPL ING ,  SCHNEIDER RICHARD DIPL PHYS DR

IPC: G11B5/48 ,  G11B5/596 ,  G11B5/22 ,  H04N5/78

公开(公告)号：DE2730719A1

公开(公告)日：1979-01-25

申请号：DE2730719

申请日：1977-07-07

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  HAMMERSCHMITT PETER DIPL ING ,  SCHNEIDER RICHARD ,  UHL KARL DIPL ING DR

IPC: G11B21/12 ,  G11B5/54 ,  G11B5/50

Abstract: An automatic loading/unloading device for at least one magnetic head, consisting essentially of a support for the head and a spring-like member incorporating a ramp, the head support being decouplable from the spring-like member during loading and recouplable thereto upon unloading. The loading/unloading device of the invention can be used with advantage in any type of magnetic storage system which employs rigid magnetic media and magnetic heads which can be positioned relative to said magnetic media.