DE1549003C - - Google Patents

Description

Patent claims:

1. Cassette for an endless belt loop with a rotatably mounted reel that has a hub and has a circular bottom flange having a roll of tape surrounding the hub carries, characterized in that the tape roll (24) carrying surface of the Bottom flange (20) has a number of elevations (44, 46, 60) and depressions (42, 56).

2. Cassette according to claim 1, characterized in that the elevations (60) or depressions (56.) lie on spirals concentric to the hub (58).

3. Cassette according to claim 1, characterized in that the elevations (44) or depressions (42) lie on circles concentric to the hub (22).

4. Cassette according to claim 1, 2 or 3, characterized in that the bottom flange is a Number of radially extending strips (54) which form the elevations or depressions form (Fig. 6).

5. Cassette according to one of the preceding claims, characterized in that the outwardly facing side surfaces of the elevations are beveled.

1 sheet of drawings

Claims (3)

1 2 wickeis an additional force on the hub of the patent claims: cassette reel and increases the friction of the innermost tape winding, which over- 1. Cassette for an endless belt loop with must be wound the necessary to one rotatably mounted spool, which has a hub 5 additional tensile force often a sliding of the tape and a circular bottom flange has, with respect to the capstan, an excessive band of wear a tape roll surrounding the hub and carry highly undesirable synchronism and its upper fluctuations, which carry the tape lap. surface is provided with elevations, on which the invention harbors the object of one of the tape reel rests, marked thereby creating ¹⁰ endless ribbon cartridge, which is also characterized in that the elevations (44, 46, 60) can be operated ⁱⁿ an inclined position without The hub (58) presses concentrically in such tight turns around the weight of the tape reel on the inner layer that parts of the tape ^{reel and their} withdrawal from the tape cassette are not (24) located between the elevations, but rather should the weight of the belt recesses (42, 56) sit on. ¹ S wickeis are caught by the coil so that 2. Cassette according to claim 1, characterized in that the inner layer is unloaded and is easy and is characterized by the fact that the elevations (60) and the connection ^{can be} pulled out of the tape cassette,
depressions (56) · sections in radially from the ^SE task are geausgebildet at a cassette of einNabe (58) outwardly running ridges (54) Type gangs mentioned accordance with the invention ²⁰ '° st, ^da ^ ^{d' e} increases concentrically in such a way 3. Cassette according to claim 1 or 2, thereby narrow. Windings around the hub run that characterized in that the outwardly facing parts of the tape roll m between the ErSeitenflächen of the ridges are beveled. sit on the depressions located on the elevations. on in this way, the elevations support section- 25 wise the tape wrap and catch its weight so that the innermost part of the tape roll of - the other parts are relieved, even if the Kas sette is operated in an extremely inclined position. The elevations can be formed by ribs or shafts and the hub in the form of The invention relates to a cassette for an end to surround spirals or circles. loose belt loop with a rotatably mounted spool, of course the ribs can both which has a hub and a circular bottom flange formed by the bottom flange and also by a component which is separate from the hub and which is formed by a band surrounding the hub,
winding carries and the tape winding carrying 35 According to a further embodiment of the Erfin surface is provided with elevations, on which manure rests on the winding-carrying surface of the tape winding. of the bottom flange a series of corrugated ribs To avoid the static effects! parts provided that extend radially from the hub Charges of the tape windings as a result of them extend opposite to the outside. lateral friction is known (USA.-Patent 40 The invention is explained in more detail below with reference to 2778 880, German utility model 1 940305), drawing, it shows
the surface of the floor F i g. 1 shows a side view of part of a power flange with radially extending ribs to be moved, under the dashboard a clay sight which is mounted to prevent friction effects, which can be made of graphite or plastic in the operating position. Will one! The cassette, which is inclined with respect to the horizontal, contains such a cassette in an inclined position, drifted, then slip the tape lap according to a Fig. 2 a partially cut plan Side together, so that the whole weight of the looks on an endless cassette according to an execution tape roll presses on the inner layer and its "example of the invention, Obstructed withdrawal from the cassette. 50 Fig. 3 a drawn on an enlarged scale Furthermore, from the German patent application, it is a cross-sectional view in a plane 3-3 of FIG. 2, 1162589 known, both inner surfaces of the coil F i g. Figure 4 is a top plan view of a tape reel for the Flanges with handy elevations in radial or fig. 2 and 3 illustrated cassette,
spiral shape, which is an automatic! FIG. 5 is an enlarged partial view of the coil in FIG Is intended to ensure threading of the end of the tape. Here! 55, however, are not endless cassettes, but about a tape transport from a reel a level 5-5 of FIG . 4, F i g. 6 a fig. 4 corresponding plan view of another embodiment of a coil for a another. Cassette of the in Figs. 2 and 3 represented type, Cassette tape recorders often have to be installed and be ticrt that the plane of the cassette with respect to 60 F i g. 7 is a sectional view in a plane 7-7 of FIG the horizontal plane is inclined. In motor vehicles F i g. 6th is such an assembly z. B. sometimes by the shape of the dashboard or other spatial There are reasons, and the cassette can sometimes be at an angle of up to 45 ° in the operating position The in the F i g. 2 and 3 shown as an embodiment of the invention has tape cassette 8 an approximately rectangular housing 10 with mutually complementary cover and base parts 12 and 14, respectively plus the horizontal plane. When the cash on. The bottom part is with an upright sette provided in a shaft 16 deviating from the horizontal, on which a tape reel 18 gc-layer is operated, exerts the weight of the tape-bearing. The tape reel 18 consists of a circular of the tape roll 24 distributed over the surface 40 of the bottom flange 20 and its corrugations. In the case of the FIG. 4 and 5, the width of the ribs 42 including the elevations 46 is at least approximately the same as the width of the channels 42 lying therebetween. This width can be ^{approximately 3.2 mm for a cassette for a 1} A inch tape. If desired, the outer sides 48 of the ridges 46 may be tapered downwardly away from the hub to provide ramp-like surfaces that facilitate the operation of winding the tape. The corrugation or ribbing of the bottom flange 20 of the tape reel has the result that the top 28 the tape roll is not flat, but has a pattern of elevations similar to the base plate, like F i g. 3 shows. In the F i g. 6 and 7 there is shown a second embodiment of a tape reel 50 for a cassette according to the invention. As can be seen from the enlarged sectional view of the coil in FIG. 7, the bottom flange 52 has a number of radially extending strips 54 in which grooves 56 are cut which lie on one or more spirals concentric to the hub. The grooves 56 are arranged so that the tape is fed through the pitch of the spiral towards the hub when the flange 52 is rotated clockwise by the tape. The walls 60 of the grooves in the strips 54 delimit channel-like areas in which parts of the tape roll 24 are retained when the cassette is operated in an inclined position, so that the pressure of the tape roll on the hub is considerably reduced. Due to the projections, corrugations or grooves running in the circumferential direction on the bottom flange the tape reel is thus prevented from beating the hub of the reel to press. In this way, loading of the innermost turns is largely prevented.