公开(公告)号：HK100186A

公开(公告)日：1987-01-02

申请号：HK100186

申请日：1986-12-24

Applicant: BASF AG

Inventor： ROOS ROLAND ,  SCHOMANN KLAUS DIETER DR ,  MUENZNER WULF DR

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/087 ,  G11B23/50 ,  H05F3/00

Abstract: A tape guide system wherein a magnetic tape having different resistivities on its back and front travels in contact with guide elements, the members of these elements which are in contact with the tape being matched to the relevant face of the tape in respect of surface resistivity and/or of charge affinity. The members contacting the front of the magnetic tape accordingly consist of a conductive or low-insulation material and the members contacting the back of the tape consist of a high-insulation material. In alternative embodiments, the contact members can consist of a material of low conductivity, or of a plastic with an added conductive material. The novel guide system can be used in any type of high-speed magnetic tape transport mechanism. The invention also concerns the tape guide elements per se, and magnetic tape cassettes employing the tape guide system.

公开(公告)号：HK95186A

公开(公告)日：1986-12-19

申请号：HK95186

申请日：1986-12-11

Applicant: BASF AG

Inventor： BALZ WERNER DR ,  MUENZNER WULF DR ,  SCHOMANN KLAUS DIETER DR ,  BERGER HEINZ ,  ROOS ROLAND

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/087 ,  G11B23/50 ,  H05F3/02

Abstract: In a tape cassette, particularly a video tape cassette, equalization of electrostatic charges between the two faces of the tape is effected by a connector element or connector elements electrically connecting at least one of two electrically conducting guide elements contacting the front of the tape and provided on the two sides, respectively, of the cassette with at least the associated one of two electrically conducting tape deflecting elements provided in the two respective front corners of the tape cassette. In this manner sticking of the tape to the deflecting elements due to electrostatic attraction therebetween and also the build-up of electrostatic charges along the tape path parallel to the front of the cassette housing due to the transporting of such charges from the deflecting elements as a result of the tape travel, are counteracted.

公开(公告)号：AT24251T

公开(公告)日：1986-12-15

申请号：AT83105855

申请日：1983-06-15

Applicant: BASF AG

Inventor： FITTERER HORST ,  ROOS ROLAND ,  MUENZNER WULF DR ,  BALZ WERNER DR ,  BERGER HEINZ

IPC: G11B23/04 ,  G11B23/087

公开(公告)号：DE3560046D1

公开(公告)日：1987-02-12

申请号：DE3560046

申请日：1985-02-09

Applicant: BASF AG

Inventor： MELZER MILENA ,  ROLLER HERMANN ,  SCHNEIDER NORBERT ,  FITTERER HORST ,  MUENZNER WULF DR

IPC: C09D127/06 ,  C09D5/23 ,  C09D163/00 ,  G11B5/72 ,  G11B5/73 ,  G11B5/735

Abstract: A process for the production of magnetic recording media by applying a magnetic layer, which consists essentially of magnetic material finely dispersed in organic polymers, to one side of a flexible base, and applying a non-magnetizable backing coating which is free of inorganic solids to that side of the base which is opposite the magnetic layer, wherein the backing coating consists of two or more polymers which are incompatible with one another and have precipitated from a solvent mixture, and magnetic recording media produced by this process.

公开(公告)号：AT19705T

公开(公告)日：1986-05-15

申请号：AT82107882

申请日：1982-08-27

Applicant: BASF AG

Inventor： ROOS ROLAND ,  SCHOMANN KLAUS DIETER DR ,  MUENZNER WULF DR

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/087 ,  G11B23/50 ,  H05F3/00

公开(公告)号：AT16536T

公开(公告)日：1985-11-15

申请号：AT82107881

申请日：1982-08-27

Applicant: BASF AG

Inventor： BALZ WERNER DR ,  MUENZNER WULF DR ,  SCHOMANN KLAUS DIETER DR ,  BERGER HEINZ ,  ROOS ROLAND

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/50 ,  H05F3/02

公开(公告)号：DE3368337D1

公开(公告)日：1987-01-22

申请号：DE3368337

申请日：1983-06-15

Applicant: BASF AG

Inventor： FITTERER HORST ,  ROOS ROLAND ,  MUENZNER WULF DR ,  BALZ WERNER DR ,  BERGER HEINZ

IPC: G11B23/04 ,  G11B23/087

Abstract: A tape cassette, in particular a video cassette, comprises two flanged reels and, between the flanges of each reel, a spring member as a biassing means to prevent the tape from slipping off the roll or folding over. The spring members can be attached to the side walls or rear wall of the housing, and their free ends constantly bear against the peripheries of the tape rolls. In specific embodiment the spring member advantageously includes the braking spring for a reel-braking device. By using a conductive material on one or both sides of the spring member and appropriately arranging the spring member relative to a tape guide element or to an element grounded on the tape recorder, it is possible to directly prevent tape loop formation, which is a cause of tape slippage and folding-over. Moreover, tape winding and unwinding are improved.

公开(公告)号：DE3271004D1

公开(公告)日：1986-06-12

申请号：DE3271004

申请日：1982-08-27

Applicant: BASF AG

Inventor： ROOS ROLAND ,  SCHOMANN KLAUS DIETER DR ,  MUENZNER WULF DR

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/087 ,  G11B23/50 ,  H05F3/00

Abstract: A tape guide system wherein a magnetic tape having different resistivities on its back and front travels in contact with guide elements, the members of these elements which are in contact with the tape being matched to the relevant face of the tape in respect of surface resistivity and/or of charge affinity. The members contacting the front of the magnetic tape accordingly consist of a conductive or low-insulation material and the members contacting the back of the tape consist of a high-insulation material. In alternative embodiments, the contact members can consist of a material of low conductivity, or of a plastic with an added conductive material. The novel guide system can be used in any type of high-speed magnetic tape transport mechanism. The invention also concerns the tape guide elements per se, and magnetic tape cassettes employing the tape guide system.

公开(公告)号：DE3267453D1

公开(公告)日：1985-12-19

申请号：DE3267453

申请日：1982-08-27

Applicant: BASF AG

Inventor： BALZ WERNER DR ,  MUENZNER WULF DR ,  SCHOMANN KLAUS DIETER DR ,  BERGER HEINZ ,  ROOS ROLAND

IPC: G11B15/60 ,  G11B23/04 ,  G11B23/087 ,  G11B23/50 ,  H05F3/02

Abstract: In a tape cassette, particularly a video tape cassette, equalization of electrostatic charges between the two faces of the tape is effected by a connector element or connector elements electrically connecting at least one of two electrically conducting guide elements contacting the front of the tape and provided on the two sides, respectively, of the cassette with at least the associated one of two electrically conducting tape deflecting elements provided in the two respective front corners of the tape cassette. In this manner sticking of the tape to the deflecting elements due to electrostatic attraction therebetween and also the build-up of electrostatic charges along the tape path parallel to the front of the cassette housing due to the transporting of such charges from the deflecting elements as a result of the tape travel, are counteracted.

公开(公告)号：DE3407721A1

公开(公告)日：1985-09-12

申请号：DE3407721

申请日：1984-03-02

Applicant: BASF AG

Inventor： BALZ WERNER DR ,  KOVACS JENOE DR ,  MUENZNER WULF DR ,  ROLLER HERMANN

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/70 ,  G11B5/72

Abstract: Magnetic recording media consist of a non-magnetic base and a magnetic layer firmly bonded thereto, the magnetic layer containing further additives in addition to ferromagnetic metal powder, an organic binder, a metal oxide powder and conventional assistants.