Patents by Inventor Wulf Muenzner
Wulf Muenzner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4751601Abstract: 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.Type: GrantFiled: November 10, 1986Date of Patent: June 14, 1988Assignee: BASF AktiengesellschaftInventors: Roland Roos, Klaus D. Schomann, Wulf Muenzner
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Patent number: 4736904Abstract: A guide means for tapes to be transported, in particular in tape cassettes or tape apparatus, comprises a support element and a flexible guide strip, in particular one made of metal foil, fixed on this, and at least one holding element for the end sections of the flexible guide strip. The guide strip possesses a predetermined thickness and may be drop-shaped or pear-shaped in the operating position. The tape guide means may also comprise a support element whose surface is at least partially cylindrical and a flexible guide strip which is fastened thereon. As a separable unit which can be preassembled, the tape guide means can therefore also be employed for automatic manufacture. The tape guide means can be used for tape guides which are either stationary or movable within limits, in the field of tape-like recording media, such as films, magnetic tapes, punched tapes, etc.Type: GrantFiled: December 24, 1985Date of Patent: April 12, 1988Assignee: BASF AktiengesellschaftInventors: Klaus Schoettle, Lothar Gliniorz, Kurt Schmidts, Eugen Kamm, Herbert Dietze, Wulf Muenzner, Dieter Gaiser, Artur Buhk, Juergen Dreyer
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Patent number: 4712148Abstract: 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.Type: GrantFiled: July 3, 1986Date of Patent: December 8, 1987Assignee: BASF AktiengesellschaftInventors: Werner Balz, Wulf Muenzner, Klaus D. Schomann, Heinz Berger, Roland Roos
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Patent number: 4667261Abstract: A tape guide system wherein a magnetic tape having different resistivites 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.Type: GrantFiled: May 28, 1985Date of Patent: May 19, 1987Assignee: BASF AktiengesellschaftInventors: Roland Roos, Klaus Dieter, Wulf Muenzner
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Patent number: 4625252Abstract: A tape guide system, especially a tape guide system for a magnetic tape cassette, comprising conductive connecting means between the tape guide elements and/or the front and back of the tape, prevents the tape from blocking, slipping from the tape reels, or folding over. In practical embodiments, pieces of flexible conductive plastics film are arranged in the vicinity of the guide elements. The novel tape guide system can be used in any type of magnetic tape transport mechanism in which increased friction occurs when the tape is transported, especially in video cassettes for all systems.Type: GrantFiled: August 25, 1982Date of Patent: November 25, 1986Assignee: BASF AktiengesellschaftInventors: Werner Balz, Wulf Muenzner, Klaus Dieter Schomann, Heinz Berger, Roland Roos
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Patent number: 4621779Abstract: 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.Type: GrantFiled: May 28, 1985Date of Patent: November 11, 1986Assignee: BASF AktiengesellschaftInventors: Horst Fitterer, Roland Roos, Wulf Muenzner, Werner Balz, Heinz Berger
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Patent number: 4581296Abstract: 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.Type: GrantFiled: February 26, 1985Date of Patent: April 8, 1986Assignee: BASF AktiengesellschaftInventors: Werner Balz, Jenoe Kovacs, Wulf Muenzner, Hermann Roller
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Patent number: 4557433Abstract: 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.Type: GrantFiled: June 23, 1983Date of Patent: December 10, 1985Assignee: BASF AktiengesellschaftInventors: Horst Fitterer, Roland Roos, Wulf Muenzner, Werner Balz, Heinz Berger
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Patent number: 4254585Abstract: A process and apparatus for the treatment of the recording surface of magnetic recording media using consecutively arranged units for burnishing, cleaning and calendering the web of plastics film provided with a magnetic coating. The process and apparatus of the invention are particularly suitable for the manufacture of magnetic tapes for the recording and playback of video signals.Type: GrantFiled: January 16, 1979Date of Patent: March 10, 1981Assignee: BASF AktiengesellschaftInventors: Klaus Schoettle, Wulf Muenzner, Hilmar Lechner, Dieter Woeppel, Lothar Gliniorz