公开(公告)号：DE2428690A1

公开(公告)日：1976-01-02

申请号：DE2428690

申请日：1974-06-14

Applicant: BASF AG

Inventor： VAETH GUENTER ,  HARTMANN HANS-JOERG DIPL ING D ,  FALK ROLAND DIPL CHEM DR ,  UHL KARL DIPL ING DR ,  GUTERMANN WINFREID ,  MAYER DIETER DR

IPC: G11B5/71 ,  G11B5/72

Abstract: A laminated magnetogram carrier, esp. UTR tape, with a layer, based on finely-divided magnetic pigment dispersed in a binder and suitable for magnetic recording, on a non-magnetisable support, contains 0.2-4, pref. 0.4-2 wt%, w.r.t. the wt. of the magnetic pigment, of a mixt. of aliphatic 14-18C monocarboxylic acids with m.pt. 50-60, pref. 52-55 degrees C. The acids are pref. added to the dispersion before application to the support.

公开(公告)号：DE3068158D1

公开(公告)日：1984-07-19

申请号：DE3068158

申请日：1980-03-12

Applicant: BASF AG

Inventor： KNELLER ECKHART DR ,  KOENIG ROLAND DR ,  KOESTER EBERHARD DR ,  GRAU WERNER DR ,  MAYER DIETER DR

IPC: G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/706 ,  G11B5/73 ,  G11B5/85 ,  H01F1/20 ,  H01F10/12 ,  H01F10/13 ,  H01F10/16 ,  H01F41/20

Abstract: A magnetic recording medium comprising a non-magnetic base which is dimensionally stable at up to 300 DEG C., and an 0.03-0.4 mu m thick magnetically hard recording layer of an Sm-Co alloy, vacuum-deposited thereon, which layer possesses uniaxial magnetic anisotropy in the plane of the layer, and a process for the manufacture of this recording medium.

公开(公告)号：DE2912708A1

公开(公告)日：1980-10-09

申请号：DE2912708

申请日：1979-03-30

Applicant: BASF AG

Inventor： FELLEISEN PETER DIPL ING ,  GROSSHANS PETER ING GRAD ,  MAYER DIETER DR

IPC: G11B5/09 ,  G11B5/012 ,  G11B21/10 ,  G11B5/48

公开(公告)号：DE2446487A1

公开(公告)日：1976-09-02

申请号：DE2446487

申请日：1974-09-28

Applicant: BASF AG

Inventor： VAETH GUENTER ,  NAGEL PETER DIPL ING ,  HARTMANN HANS-JOERG DIPL ING D ,  UHL KARL DIPL ING DR ,  GUTERMANN WINFRIED ,  MAYER DIETER DR

IPC: G11B5/73 ,  G11B5/70 ,  B29D17/00

Abstract: Laminated magnetogram carrier consists of (1) flexible polyethylene terephthalate having a thickness of 4-36 mu m, (2) opt. a bond-promoting intermediate layer, and (3) a magnetic, image-registering layer consisting of a finely divided magnetic pigment in a binder. Layer (1) possesses an average surface roughness (Rz) of 0.05-0.20 mu m, and a max. point roughness (Rt) of is not >200 of the average surface roughness. Gives video signals having a low grass noise and a satisfactory mitte value. Percentage of reject carriers is greatly reduced.

公开(公告)号：DE3065149D1

公开(公告)日：1983-11-10

申请号：DE3065149

申请日：1980-06-23

Applicant: BASF AG

Inventor： FELLEISEN PETER ,  MAYER DIETER DR ,  KOESTER EBERHARD DR ,  DOMAS FRIEDRICH ,  DEIGNER PAUL DR

IPC: C09D5/23 ,  G11B5/70 ,  G11B5/716 ,  G11B5/718 ,  G11B5/84 ,  G11B5/842

Abstract: A magnetic recording disk comprising a non-magnetic substrate and two or more firmly adhering magnetizable layers applied to one or both sides thereof, the layer located directly on the substrate being magnetically isotropic, while the second layer and any additional layers exhibit orientation of the anisotropic magnetic particles parallel to the substrate and to the envisaged recording direction.

公开(公告)号：DE2424106A1

公开(公告)日：1975-12-04

申请号：DE2424106

申请日：1974-05-17

Applicant: BASF AG

Inventor： ELFF KLAUS ING GRAD ,  DEIGNER PAUL DR ,  UHL KARL DIPL ING DR ,  MAYER DIETER DR

IPC: G01N3/56 ,  G11B5/00 ,  G11B5/187 ,  G07C3/00 ,  G11B5/46

Abstract: Wear resistance test rig is used for tape guide elements of magnetic tape recorders. The surface which is in contact with the abrasive magnetic tape is fitted with recesses of a geometrical form where the depth has a defined ratio to the surface area. The depth is measured before and after a wear test and the wear depth is calculated from that. This is a simpler method than use of vapour deposits of metallic films, and it is easier to interpret than readings taken by the radioactive isotope method. A double magnetic sound head (8) has on its contact face (7) several rhomboidal impressions (6). These impressions are arranged symmetrically to the gaps (9, 10) between the pole faces (11, 12). The dotted lines (13, 14) indicate the boundaries of the contact surface (15).

公开(公告)号：DE3343107A1

公开(公告)日：1985-06-05

申请号：DE3343107

申请日：1983-11-29

Applicant: BASF AG

Inventor： DORSCH CHRISTINE ,  HEILMANN PETER DR ,  KULLMANN UDO DR ,  MAYER DIETER DR ,  GRAU WERNER DR

IPC: G11B5/66 ,  G11B5/64 ,  G11B5/72 ,  H01F10/26 ,  B05D5/12 ,  C23C13/02

Abstract: Magnetic recording media possess, on a dimensionally stable base which may or may not be provided with a non-magnetic lower layer, a thin ferromagnetic metal layer on which a protective layer consisting of a silicon monoxide/chromium dual coating is applied.

公开(公告)号：DE2960644D1

公开(公告)日：1981-11-12

申请号：DE2960644

申请日：1979-10-18

Applicant: BASF AG

Inventor： MOTZ HERBERT DR ,  SCHAEFER DIETER DR DIPL CHEM ,  HUEBNER WERNER DR ,  MAYER DIETER DR

IPC: G11B5/70 ,  B01F5/06 ,  B01F15/02 ,  B05D5/12 ,  C09D5/23 ,  C09D7/12 ,  G11B5/68 ,  G11B5/84 ,  G11B5/845

Abstract: A process for the manufacture of magnetic recording media by dispersing a mixture of particulate anisotropic magnetic material and additives in a solution of a polymeric binder in an organic solvent, compressing and then releasing the pressure on the dispersion, thereafter applying a layer of the dispersion to a non-magnetizable base, orienting the anisotropic magnetic material by means of a magnetic field, and drying the coating.

公开(公告)号：DE2606418A1

公开(公告)日：1977-09-01

申请号：DE2606418

申请日：1976-02-18

Applicant: BASF AG

Inventor： LOESER WERNER DIPL ING DR ,  MAYER DIETER DR ,  STECK WERNER DR ,  TREPTOW WOLFRAM DR ,  BOEHN HUGO

IPC: G11B5/64 ,  G11B5/72 ,  G11B5/84 ,  G11B5/858 ,  C25D11/02

公开(公告)号：DE2228643A1

公开(公告)日：1974-01-10

申请号：DE2228643

申请日：1972-06-13

Applicant: BASF AG

Inventor： HARTMANN WERNER JOB DR ,  HARTMANN HANS-JOERG DR ,  MAYER DIETER DR ,  FELLEISEN PETER DIPL ING ,  KLEIN URSULA ,  MOTZ HERBERT DR

IPC: G11B5/62 ,  G11B5/708 ,  G11B5/72