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    4.
    发明专利
    未知

    公开(公告)号：DE10054859A1

    公开(公告)日：2002-05-08

    申请号：DE10054859

    申请日：2000-11-06

    Applicant: BASF AG

    Inventor： SAUERER WOLFGANG ,  BAIERWECK PETRA ,  GRZESCH STEFFEN ,  MATTUS VIKTOR ,  ROOS ROLAND

    IPC: B29C65/16 ,  B23K26/00 ,  B29C59/16 ,  C08J3/20 ,  C08J3/28

    Abstract: The invention relates to a method for connecting a moulded part (I) consisting of a thermoplastic polymer A containing colouring agents to a moulded part (II) consisting of a thermoplastic polymer B containing colouring agents by means of laser radiation. According to said method, 1) the laser radiation passes through moulded part (I) at the point to be connected and strikes moulded part (II), 2) moulded part (I) contains at least one colouring agent which absorbs selectively in the visible range of the electromagnetic spectrum, 3) the colouring agents contained in moulded part (I) and the concentrations thereof are chosen in such a way that moulded part (I) is permeable to laser radiation at the point to be connected, 4) the colouring agents contained in moulded part (II) and the concentrations thereof are chosen in such a way that moulded part (II) absorbs the laser radiation at the point to be connected and 5) the colouring agents contained in the two moulded parts (I) and (II) and the proportions thereof are chosen in such a way that moulded parts (I) and (II) are perceived by the human eye as having essentially the same colour.

    6.
    发明专利
    未知

    公开(公告)号：BR8205095A

    公开(公告)日：1983-08-09

    申请号：BR8205095

    申请日：1982-08-31

    Applicant: BASF AG

    Inventor： ROOS ROLAND ,  SCHOMANN CLAUS DIETER ,  MUENZER WULF

    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.

    TAPE CASSETTE
    8.
    发明专利
    TAPE CASSETTE 未知

    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.

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