Abstract: A recording or reproducing apparatus which performs loading and unloading operations of a tape relative to a magnetic head unit and moves tape guide members by rotatably driving two loading rings on which the corresponding tape guide members are mounted. Driving force transmission members are provided for transmitting the rotation of one of the rings to the other ring, and elastic members are provided for driving the transmission members in a predetermined direction. The tape guide member mounted on the one ring is pressed against a locating member by the force of the elastic member during loading of the tape.

Abstract: Apparatus for recording or reproducing signals on a magnetic recording tape by wrapping the tape around a rotary drum unit of type including a stationary drum and a rotary drum supported by the stationary drum is provided with grooves which are formed in the stationary drum, the grooves being deeper than the depth of surface coarseness of the stationary drum and being located adjacent a point at which the tape parts from the stationary drum when the tape travels for recording or reproduction.

Abstract: A recording or reproducing apparatus mounting a cassette housing a magnetic tape wound around a supply reel and a takeup reel, for performing an operation of moving the cassette in a predetermined direction, drawing the magnetic tape out of the cassette and loading the tape on a magnetic head unit, and for performing an operation of moving the cassette in a direction which is reverse to the above-described direction, taking up the tape around the takeup reel in the cassette and withdrawing the tape from the magnetic head unit. The apparatus includes structure for locking the supply reel in the cassette during the withdrawing operation and for releasing the lock during the loading operation. The locking/releasing structure is linked with the movement of the cassette during the loading and withdrawing operations of the magnetic tape.

Abstract: A rotary head type recording or reproducing apparatus of the type in which the recording or reproduction of signals is effected by tracing a recording medium transported in a predetermined direction with rotary heads in a direction which is at less than 90.degree. with respect to this predetermined direction. The apparatus is provided with a rewinding mode in which the above-mentioned recording medium is transported in a direction reverse to the above-mentioned predetermined direction without performing the recording or reproduction of signals, with the rotary heads being in the condition where they can trace the recording medium. In this rewinding mode, the rotary heads are rotated in a direction reverse to their rotating direction during the recording or reproduction of signals.

Abstract: The present invention relates to a process for treating a surface of a copper foil for producing the copper foil for a printed circuit board in which a zinc layer, a copper layer and a chromate layer are formed in turn on the copper foil. The product of the present invention is excellent in heat resistance and hydrochloric acid resistance and the process according to the present invention does not require the use of dangerous chemicals and is free from any problems on safety.

Abstract: A reel driving mechanism is provided with a braking member for braking a rotary member which rotates a reel table via a torque limiting member, in correspondence with the direction of rotation of the reel table and in interlinking relation with the reel table.

Abstract: A recording apparatus of the kind forming recording tracks by recording both first and second information signals on a recording medium, including (a) an erasing device for erasing signals recorded on the recording medium; (b) a first erasing signal generating circuit which generates a first erasing signal for erasing only the first information signal; (c) a second erasing signal generating circuit which generates a second erasing signal for erasing both the first and second information signals; and (d) a switching circuit which supplies the erasing device with either the first erasing signal or the second erasing signal by switching them over one to the other.

Abstract: A rotating head assembly comprises a fixed lower drum; a rotating member which has at least one head and also has a void hole in a position corresponding to the axis of rotation; supporting means which is disposed in a position farther away from the axis of rotation than the void hole and is arranged to support the rotating member rotatably relative to the fixed lower drum; and at least one composing means which is arranged by utilizing the void hole to compose at least a portion of the rotating head assembly.

Abstract: A rotary head device for a rotary head-type magnetic recording/reproducing apparatus comprising a fixed drum and a rotary member which has a magnetic head disposed therein is provided with a ball bearing which is formed by inserting a plurality of rolling members into annular grooves which are respectively formed in the fixed drum and the rotary member on their opposed sides and are located adjacently to their peripheries.

Abstract: In the disclosed video signal recording and reproducing apparatus, a cylinder member arranged to have a tape-shaped recording medium wound thereon, includes five rotating heads. The first head has a specific head width and azimuth angle. The second rotating head is approximately equal in head width to the first rotating head but differs from the first rotating head in azimuth angle. The third rotating head has a narrower head width than the first rotating head but is equal to the first head in azimuth angle. The fourth rotating head is approximately equal in head width to the third rotating head and equal in azimuth angle to the second rotating head and the fifth rotating head is equal in azimuth angle to the third rotating head.

Abstract: An adapter permits mounting of a large cassette on a information recording and/or reproducing apparatus adapted for recording or reproducing records on a strip like recording medium contained in a small cassette mounted on the apparatus, so that both small and large cassettes can be used on the apparatus with the adapter mounted thereon.

Abstract: An information recording device by means of which the information signal such as the picture signal, the sound signal and others are recorded on a recording medium and the information reproduced from the recording medium on which the information has been registered and that from other sources is recorded again on the same recording medium selectively either individually or mixed.

Abstract: An information recording device by means of which the information signal such as the picture signal, the sound signal and others are recorded on a recording medium and the information reproduced from the recording medium on which the information has been registered and that from other sources is recorded again on the same recording medium selectively either individually or mixed.

Abstract: Information recording apparatus includes a first recording mechanism for recording information at a certain location on a recording medium such as a tape, and a reproducing mechanism for reproducing the information recorded on the tape. A source of information different from the information recorded on the tape is coupled to mixing circuitry which mixed the information reproduced from the tape by the reproducing mechanism, and the newly generated information, and the combined information is re-recorded by a second recording mechanism at the certain location on the tape.

Abstract: An information recording device by means of which the information signal such as the picture signal, the sound signal and others are recorded on a recording medium and the information reproduced from the recording medium on which the information has been registered and that from other sources is recorded again on the same recording medium selectively either individually or mixed.

Abstract: A device wherein object images are formed on photoelectric converter means arranged in the form of a row by a pair of imaging optical systems fixedly disposed with a base line length therebetween and the spacing between the two images is electrically detected to thereby determine the distance to the object, includes a mechanism with which the two images formed by the pair of optical systems can be relatively displaced and regulated in three directions perpendicular to one another and the row-like photoelectric converter means is rotatable about the optical axis of one of the pair of imaging optical systems and in a plane perpendicular to said optical axis. The entire range finding optical mechanism is rotatable about two axes orthogonal to each other.

Abstract: A camera having a zoom lens with a focusing range changeover device for selectively permitting photography in either one of the ordinary zoom and macro-zoom modes. An automatic focus adjustment is effected by measuring a distance from the camera to an object to be photographed through an optical system outside the zoom lens. When the camera is switched by the changeover device from the ordinary zoom mode to the macro-zoom mode, the automatic focus adjustment device is excluded automatically, or the film winding and shutter cocking mechanism are caused to be simultaneously inoperative. Upon movement of a knob from the autofocusing position, the mechanism is caused to be operative with manual focusing to thereby avoid reduction of image sharpness due to the parallax error which is greatly increased in macro-photography.