公开(公告)号：DE2161083A1

公开(公告)日：1973-06-14

申请号：DE2161083

申请日：1971-12-09

Applicant: BASF AG

Inventor： MICHEL HANS-JUERGEN DR ,  UHL KARL DR ING ,  SEIBERTH HANS DR ING ,  LOEWENBERG GUSTAV DIPL ING ,  REIMER DIETER

IPC: H01F1/06 ,  G11B5/845 ,  G11B5/84

公开(公告)号：DE2606832A1

公开(公告)日：1977-09-08

申请号：DE2606832

申请日：1976-02-20

Applicant: BASF AG

Inventor： JAKUSCH HELMUT DIPL PHYS DR ,  SAPPOK REINHARD DIPL CHEM DR ,  SCHOENAFINGER EDUARD DIPL CHEM ,  SCHNEEHAGE HANS HENNIG DIPL CH ,  LOEWENBERG GUSTAV DIPL ING ,  GRAU WERNER DIPL CHEM DR ,  MAHLER KARL DIPL ING DR ,  FALK ROLAND DIPL CHEM DR

IPC: C09D5/23 ,  G11B5/84 ,  G11B5/68 ,  B05D5/12

Abstract: Magnetic recording material is prepd. by intensive mixing of needle-like magnetic pigment and a carrier liq. comprising a synthetic organic binder and a dispersing agent to a paste and subsequent drying and granulating to a free flowing pigment mixt. The pigment mixt. is conventionally mixed with a synthetic organic binder, solvent and opt. other additives to form a dispersion which is coated thinly and evenly with simultaneous alignment of the needle-like pigment onto a support and dried. The recording material has improved packing in the binder and improved alignment. In a example, Fe2O3 powder was mixed with a polyesterurethane, dried, granulated, dispersed in a vinyl chloride copolymer soln. and coated onto a PET support.

公开(公告)号：DE2251746A1

公开(公告)日：1974-05-02

申请号：DE2251746

申请日：1972-10-21

Applicant: BASF AG

Inventor： FITTERER HORST DIPL ING ,  WOWERIES UWE DIPL ING ,  LOEWENBERG GUSTAV DIPL ING ,  GAISER DIETER

IPC: G11B23/087 ,  G11B23/04

Abstract: The invention relates to magnetic tape cartridges in general in which between the tape packs and the upper and lower cartridge walls liners are provided which have regions that resiliently guide the tape packs and/or the magnetic tape. By means of specifically shaped regions of the liners, guide channels for the outer turns of the tape pack and/or for the winding or unwinding magnetic tape are formed according to the invention. By virtue of particular spatial arrangements of these guide channels, slipping and folding of the turns of tape already wound is avoided and the magnetic tape is maintained in the correct position as it leaves and joins the packs, irrespective of the type of bearing means used for the tape winding reels and irrespective of the shape of the tape packs, so that disturbances in operation are avoided and the tape is correctly positioned relative to the scanning means. Cartridges according to the invention may be employed advantageously in the recording and reproduction of audio and other signals.