摘要:
A magnetic recording and reproducing apparatus, in which a magnetic tape is automatically mounted on a tape guiding drum containing rotary magnetic heads for the recording and reproduction of signals on and from the tape, is provided with a pair of tape drawing and mounting members which are engageable with a tape in a cassette mounted on the apparatus and movable along guide slots in guide board to draw the tape out of the cassette to a position in which the tape is mounted on and extends around the tape guiding drum. The tape drawing and mounting members are operatively connected to chains. Drive mechanism is provided to wind and unwind the chains so that the chains are moved along guide members to thereby move the tape drawing and mounting members, respectively, away from the cassette for the required tape drawing and mounting operation.
摘要:
A system for bringing a wire-shaped or tape-shaped carrier into contact with a carrier guide member in a predetermined position includes carrier withdrawing guide members each movable between an operative position in which the carrier is brought into contact with the carrier guide member and an inoperative position in which the carrier is out of contact with the carrier guide member. A plurality of strip-shaped power transmitting members formed to be flexible and connected at one end thereof to the carrier withdrawing guide members respectively are each slidably fitted in one of guide grooves of a guide groove member formed as an insert on the base. A drive connected to a motor is in engagement with the strip-shaped power transmitting members to drive the same and move the carrier withdrawing guide members connected to the strip-shaped power transmitting members, whereby the carrier withdrawing guide members can be moved between the operative and inoperative positions.
摘要:
A guide roller of a tape traveling system of a video tape recorder and the like for changing the direction of travel of a magnetic tape and regulating the heightwise position of the tape during its travel including a roller body of a diameter not constant but smoothly varying axially thereof for exerting on the traveling tape a force tending to shift the tape axially. The guide roller has a flange at the top and the bottom of the roller body having a tape guide surface for contacting the edge of the tape which is not perpendicular to the axis of the roller body but convex as viewed from the respective end of the roller body, to prevent the edge of the tape from striking the edges of the flanges. The roller body may be conical at its outer peripheral surface and at the tape guide surface of each flange.
摘要:
A magnetic-tape running system for a video tape recorder having inclined pins and/or guide rollers having distant flanges. The pins and the guide rollers are inclined at suitable angles in the front and back directions and left and right directions so that the tape is guided only at its lower edge in such a manner that the tape runs stably along the cylinder lead at a constant contact pressure.
摘要:
A dental composition comprises a powdery component and a liquid component, which are mixed together to use it as a tissue condition, (a) the powdery component is at least one of a copolymer of butyl methacrylate with ethyl methacrylate or a mixture of poly butyl methacrylate with poly ethyl methacrylate, and (b) the liquid component is at least one of butyl phthalyl butyl glycolate (BPBG), dibutyl phthalate (DBP), benzylbutyl phthalate, benzyl benzoate, ethyl benzoate, butyl benzoate and amyl benzoate.