摘要:
Magnetic recording media are produced by a method wherein a fluid dispersion of finely divided magnetically anisotropic material in a film-forming binder mixture containing a polyurethane (obtained from a polyester which possesses free hydroxyl groups, and a di- or polyisocyanate) is applied to a non-magnetic base and the magnetic layer is then hardened.
摘要:
An apparatus for continuously cleaning the surface of a web of plastics film provided with a magnetic coating, especially the surface of a magnetic tape, the surface to be cleaned being continuously kept in close contact with a tape of nonwoven fabric by virtue of the configuration of the path of travel of the web, wherein the poles of a magnet, which define an air gap, are located in the region of the contact area, behind the tape of nonwoven fabric, on the side facing away from the web.
摘要:
The invention relates to a magnetic tape cassette with a screening shield which is easy to produce and to insert into the cassette and which exhibits a better screening effect than known shields. The screening shield consists of a strip of flexible "soft" magnetic material which is bent into arcuate shape prior to insertion into the cassette and held in the cassette in straightened or bowed shape under flexural stress by suitably designed holding means in the cassette.
摘要:
The invention relates to a lancing system having a lancet carrier tape (3) supporting a plurality of lancets (4), a transport means (5, 11, 17) serving to move the lancet carrier tape (3) in a feed or transport direction along a transport path and to thereby move lancets (4) of the lancet carrier tape (3) one after the other to a puncturing position, and a lancing drive (6) for causing a lancet (4) that occupies a puncturing position to perform a puncturing movement. It is provided according to the invention that during a puncturing movement the lancing drive (6) moves a lancet (4), that has been brought to a puncturing position, in the puncturing direction together with a portion of the lancet carrier tape (3) on which that lancet (4) is supported and that once a lancet (4) has been moved to the puncturing position at least one element of the transport means (5, 11, 17), arranged behind the puncturing position in the transport direction, performs a movement before or during the puncturing movement of that lancet (4).
摘要:
A pressure device for recording media in tape form, in particular magnetic tapes, has at least one pressure element and comprises a support element. When the device is actuated by the head coming to bear, a deflection of the device takes place, and a pressing against the recording medium is effected automatically by at least one extension of the support element, this pressing ending automatically when the head is no longer in bearing contact. The bearing pressure may take place directly on the tape rear side or tape front side, or else indirectly on the tape front side or the tape rear side or both sides simultaneously. Pressing and/or antifriction and/or cleaning elements may also be arranged, at least partially, fixed in place with respect to the tape. The invention can be used in the case of all cassettes, film and magnetic-tape systems.
摘要:
A pressure spring for tape cassettes which consists of a spring steel strip which is, in particular, narrow and is of roughly uniform width comprises a flat central part and curved spring arms adjacent to said part and having a continuous curve. The flat central part has, as fastening parts, holes with indented fastening collars which, together with rivet pegs and recesses in a housing wall, form a roughly projection-free spring fastening, the riveted peg ending roughly at the spring surface. The pressure spring exhibits a straight line with a defined slope in the operating region of its spring characteristic. The pressure spring can be used for tape cassettes of all types, in particular for video cassettes.
摘要:
A locking/unlocking means for cassettes, in particular those having swivel cover flaps, consists partially or completely of elastically deformable material and is pivotably mounted at two or more points. In the rest position of the locking/unlocking means, advantageously a swivel plate, an essentially tension-free arrangement is obtained by means of a supporting extension above the bearing axis, by actuation from outside, the said arrangement being converted in the operating state, without further spring elements, into a state of tension and into a position in which the supporting extension rests against the inside of an outer cassette wall and a reaction force corresponding to the actuating force is generated without any additional spring. Such a locking/unlocking means is suitable for cassettes of all types.
摘要:
A clamp for flexible strip material, e.g. for a tape reel, is designed to be completely separable from a hub and consists of parts (11, 12) which can be connected to one another and to the tape of strip element outside the hub and can be inserted into the hub.The clamp is suitable in principle for any type of reel for tape-like or strip-like material, in particular for magnetic recording media.
摘要:
A magnetic tape transport apparatus wherein at least one capstan simultaneously drives the take-up and supply reels, and wherein tape tension is generated by a braking device allotted to each tape reel, each braking device consisting of an assembly of levers (A, B, C, and D, E, Z) and a braking cable which is wound around the axle supporting the tape reel, and by means of which the braking forces are so adjusted that it is always the axle of the supply reel which is braked, while the axle of the take-up reel runs relatively freely. In a practical embodiment, the lever assembly comprises at least three hingedly connected levers (A, B, C and D, E, Z), viz. two lateral levers and an interconnecting lever, it being possible to obtain different lever arrangements by varying the locations of the movable pivot points (G) and the fixed fulcrum points (F) FIGS. 1 to 3). The tape transport with such braking devices is suitable for all types of magnetic tape recorder, such as audio, video and data recording apparatus, and can be used with particular advantage in compact portable recorders.