摘要:
A miniature video magnetic tape cassette which is easy to assemble. An opening is formed in a front part of a cassette body which is covered by a guard panel, with the guard panel being swingably supported on the cassette body by shafts protruding from an inner surface of the side walls of the guard panel fitted into openings in the cassette body. A coil spring is supported on each supporting shaft with one end of each spring engaged with the guard panel to urge the guard panel toward the closed position of the opening. The other end of each coil spring is held by a locking structure provided on an inner surface adjacent to side wall of the upper half of the cassette body. The locking structure may be a locking shaft with the other end of the coil spring engaged with the locking shaft. Otherwise, the locking structure can be formed by a gap between the side wall of the upper half of the cassette and a supporting side wall inwardly thereof, in which case the other end of the coil spring is inserted into the gap and fixedly held therein with a block fitted in the gap.
摘要:
A magnetic tape cassette having a pair of tape reels each having a peripheral portion which is provided with a gear. A brake member engages with the gears to stop rotation of the reels. The brake member is slid by a tapered pin. The contact surface of a rib adapted to limit the upward movement of the brake member. The contact surface of the brake member is inclined with respect to the bottom of the cassette in such a manner as to be wider in a reel braking releasing direction.
摘要:
A magnetic tape cassette having two symmetrical sides and which includes a cassette body having shaft-receiving holes formed respectively in right and left walls of the cassette body in such a manner that the holes are elongated in the front-to-rear direction of the cassette body. A substantially U-shaped guard panel is provided having cylindrical shafts on both ends engaged with the elongated holes so that the guard panel can be swung about the axis of the shafts. A spring is connected between the cassette body and the guard panel to urge the latter to close the opening formed in the front wall of the cassette body.
摘要:
A transfer film comprising a base film and a releasant layer, an ink layer and an adhesive layer laminated on the base film in this order is inserted into a cavity of an injection mold, and injection molding material is injected into the cavity. After the molded article is removed from the mold, the base film is peeled off and the ink layer is transferred to the surface of the molded article. The injection mold has a coring pin for forming an opening in the molded article and the contact surface of the coring pin to be brought into contact with the adhesive layer of the transfer film has poor adhesion to the adhesive layer so that the bond strength between the contact surface of the coring pin and the adhesive layer is lower than those between the ink layer and the releasant layer and between the releasant layer and the base film.
摘要:
A magnetic tape cassette includes a reel retaining plate for urging hubs of take-up and supply reels vertically downward to achieve uniform tape recording and playback characteristics. The reel retaining plate contains a plurality of protrusions at its central portion which engage with a plurality of vertically extended grooves that are contained in a cylindrical wall which is located on a lower cassette half, the cylindrical wall defining an insertion hole for a light emitting element of a photosensor. The reel retaining plate is held between a top surface of the cylindrical wall and an inner surface of an upper cassette half.
摘要:
A magnetic tape cassette having a lower half portion with a photo-sensor inserting hole. The upper half is mated with the lower half to form a cassette body. A tape supplying reel and a tape winding reel are disposed in the body. A reel retaining plate of elastic material is employed for depressing the tops of the reels. The reel retaining plate is fixedly secured to an inner surface of the upper half of the cassette body which is in alignment with said photo-sensor inserting hole.
摘要:
A tape clamp to be fitted into a recess of a hub in a magnetic tape magazine to fix an end of a recording tape to the hub includes a body portion having a curved outer surface, a pair of lugs projecting from the inner surface of the body portion, and a pair of ribs, each rib connecting the free end of a lug and an intermediate point on the inner surface of the body portion. The ribs are inwardly and resiliently deflected when the tape clamp is fitted into the recess. The outer surface of the body portion has an inherent curvature slightly larger than that of the peripheral surface of the hub and is bowed to have a curvature substantially equal to that of the peripheral surface of the hub when the ribs are deflected.
摘要:
A magnetic tape cassette including four rotatably supported guide rollers 40, 40", 41, 41' in place of conventional fixed pins to assure positive biasing correction of a travelling tape, and mating insert tabs 46 and elongated slots 47 disposed on the raised edges of the upper and lower cases 32, 33 of the cassette to increase the rigidity of the cases and decrease strains, and to accurately maintain the parallelism of the reels and the guide rollers.
摘要:
A magnetic tape cassette system is described, comprising a magnetic tape cassette and a storage case therefor, wherein at least one of the magnetic tape cassette and the storage case is molded using a resin composition containing from 75 to 95% by weight of .alpha.-methylstyrene-acrylonitrile copolymer (A) and from 5 to 25% by weight of graft copolymer (B) obtained by reacting a polybutadiene-based rubber with monomers consisting of styrene and acrylonitrile, wherein said .alpha.-methylstyrene-acrylonitrile copolymer is a copolymer having a composition consisting of from 75 to 90% by weight of .alpha.-methylstyrene, from 10 to 25% by weight of acrylonitrile, and from 0 to 5% by weight of styrene, and 30% by weight or more of said .alpha.-methylstyrene-acrylonitrile copolymer is a copolymer component having a composition containing 82% by weight or more of .alpha.-methylstyrene.
摘要:
Guide bars are positioned to define the center of a magnetic recording medium by contacting the inner circumference of a circular hole of the magnetic recording medium. Through holes are positioned in a medium grasping portion of a lower hub at equal distances from the center of the lower hub. The guide bars are inserted into the through holes of the lower hub and engaged with the inner circumference of the circular hole of the magnetic recording medium mounted on the lower hub. The end portions of the guide bars are then pushed by an upper hub to which a double-faced adhesive member is secured, thereby moving said guide bars away from the surface of the magnetic recording medium and securing the double-faced adhesive member to the magnetic recording medium and the lower hub.