Abstract: A method for efficiently manufacturing a magnetic tape in which damage to the side edges of the tape is prevented so as to prevent problems such as signal dropout. A source tape is provided having a magnetic recording layer formed thereon. The source tape is slivered to produce individual tapes of a final product width. The obverse and reverse surfaces of the individual tapes are then smoothed with a calendaring unit composed of a pair of heated work rolls and a pair of backup pressure rolls, and finally the individual magnetic tapes are wound on long rolls.

Abstract: A joint inspection apparatus comprises a light irradiating device for irradiating light to a tape joint at which two tape edge portions are joined together, and a light receiving device for receiving the light irradiated by the light irradiating device to the tape joint and passing through the tape joint or reflected by the tape joint. A judgment device is provided for judging the extent of a deviation of the two tape edge portions from each other in the tape width direction at the tape joint on the basis of information on the optical amount of the light received by the light receiving device on both sides of the tape joint.

Abstract: A method for winding a magnetic tape in which, at the position where the magnetic tape is being wound onto a flanged tape winding body, a magnetic field is applied to the magnetic tape in the vicinity of the tape winding body to urge the magnetic tape in a direction of the width of the tape, while simultaneously the tape is guided in such a manner that a relative position in the direction of the width of the tape between a corner, defined by an inner surface of one flange of said tape winding body toward which the magnetic tape is attracted by the magnetic field and a core portion of the tape winding body, and one lateral edge of the magnetic tape facing said inner surface of said flange ranges in the vicinity of the outer periphery of said flange varies from a position where there is a space of 0.5 mm between the corner and the one lateral edge to a sliding contact position where the two overlap each other in an amount of 0.5 mm.

Abstract: A tape winding device in which magnetic tape is wound onto a reel. One or more magnets exert a magnetic force on the wound tape in a direction along the thickness of the tape, that is, along a diameter of the reel, in order to neatly wind the tape. The magnets may be movable radially to maximize the magnetic force or be moved axially to control the axial position of the tape independently of the reel flanges.

Abstract: A joint inspection apparatus comprises a light irradiating device for irradiating light to a tape joint at which two tape edge portions are joined together, and a light receiving device for receiving the light irradiated by the light irradiating device to the tape joint and passing through the tape joint or reflected by the tape joint. A judgment device is provided for judging the presence or absence of an overlap of the two tape edge portions one upon the other at the tape joint on the basis of information on the optical amount of the light received by the light receiving device in the vicinity of the tape joint.

Abstract: A method for inspecting a tape splice for defects in which the splice region between two sheets is irradiated with a light beam, the tapes are longitudinally conveyed relative to the light beam, a one-dimensional light detector means receives the portion of the light beam transmitted or reflected by a linear region of the sheets inclined at a prescribed angle to the transverse direction of the sheets, and the presence/absence of a splice defect is discriminated from change or lack of change in the quantity of light received by the light detector means; and an apparatus for carrying out this method.

Abstract: A tape winding device for a magnetic tape in which an annular magnet surrounds a drive shaft of a take-up reel. The magnet is supported on a side opposite the reel by a ferromagnetic support.

Abstract: In a magnetic tape winding system, an end portion of a magnetic tape, which is cut after the magnetic tape is wound by a predetermined length from a magnetic tape feed roll to a first small wind-up frame, is joined with one end portion of a leader tape having the other end portion engaged with a second small wind-up frame by use of a joining tape. Immediately after the joining, the magnetic tape and the leader tape joined by the joining tape is rewound by a predetermined length around the second small wind-up frame, whereby slack of the tape between the first small wind-up frame and the second small wind-up frame is eliminated without causing the joining section of the magnetic tape with the leader tape to contact the magnetic tape surface at the outermost circumference of the magnetic tape roll wound around the first small wind-up frame.

Abstract: A method and apparatus for loading a magnetic tape into a cassette providing an improved tape winding appearance and improved total tape loading time. During winding, the pressure in the region surrounding the cassette into which the tape is being wound is reduced, while simultaneously a magnetic field is applied to the tape, at least in the vicinity of the tape winding body onto which the tape is being wound. Decompression is started substantially at the same time or slightly after the start of the tape winding operation, and the region is similarly returned to atmospheric pressure as the tape winding operation is being completed.

Abstract: A magnetic tape winding method and apparatus in which a magnetic field is applied to a magnetic tape during winding on a reel to even up the edges of the wound tape. After winding, the magnetic tape is demagnetized.

Abstract: A tape winding method and apparatus in which a magnetic tape is wound on a reel having only one flange. During winding a magnetic field is applied across the width of the magnetic tape and a pressure disk biases the tape against the flange. Both mechanisms true the edge of the tape to the flange.

Abstract: A method and apparatus for loading a magnetic tape into a cassette in which the tape winding appearance is controlled and improved. Friction sheets are disposed around the hub onto which the tape is to be wound, preferably on both sides of the tape winding area. Compressed air is blown into the cassette to press the friction sheets against the edges of the tape as the tape is wound.

Abstract: A tape winding method and apparatus in which two sets of magnets disposed at different places around the take-up reel of a magnetic tape apply a magnetic field in the width direction of the tape at one position and in the thickness direction at another position. Thereby, the tape is both radially compressed and evened to one side.

Abstract: A tape winding apparatus for a magnetic tape in which a permanent magnet apples a magnet field to the magnetic tape as it is being wound on a take-up reel. The permanent magnet is of the rare earth type being made of such materials as Sm-Co or Nd-Fe-B of annular form, small in size, coaxial to the wound tape and adjacent to the side thereof, and of high field intensity.

Abstract: A tape winding device in which a tape is wound onto a reel. A magnetic field is applied to the tape during winding in a direction oblique to the axis of rotation and thus to the tape thickness whereby the tape is evened up to the flange of the reel.

Abstract: A magnetic tape winder in which a magnetic tape is wound onto a flanged reel which being subjected to a magnetic field in the width direction of the tape. The reel is fit between the poles of a U-shaped magnet.

Abstract: A method and apparatus for winding a magnetic tape on a reel. A magnetic field is applied along the width of the wound tape to pull the magnetic tape against a flange. Air is jetted between the tape layers at the point where the tape is wound so that the layers can more freely move relative to each other. Air pressure is reduced at another point around the wound tape so as to deplete the air so entrained between the layers.

Abstract: A tape winding device for magnetically aligning the edge of a magnet tape. A permanent magnet is disposed on a side of a take-up reel opposite the side of a drive shaft rotating the take-up reel. The magnet extends over the diameter of the wound tape.

Abstract: In a magnetic tape winding system for winding a magnetic tape by a predetermined length around a small winding frame from a magnetic tape feed roll, the condition of winding of the magnetic tape around the small winding frame is detected, and the winding surface condition of the magnetic tape wound around the small winding frame is optically imaged at predetermined timing. The quality of the winding surface condition of the magnetic tape wound around the small winding frame is judged by a calculation processing of image signals obtained by the optical imaging. The speed of magnetic tape winding around the small winding frame is adjusted based on results of the judgment.

Abstract: A method of winding a predetermined length of magnetic recording tape from a large reel (on which the tape is initially wound), onto a small reel, in which the running speed of the tape is gradually increased at the beginning stage of each winding cycle to a predetermined high speed, is subsequently kept at the high speed, and is gradually slowed down near the end of the cycle, and then the tape is finally stopped to end the cycle. Simultaneously with the beginning of each winding cycle, an encoder begins to generate a pulse train, the number of pulses of which is in proportion to the number of rotations of the small reel. The number of pulses in the pulse train is counted and the tape running speed is gradually slowed down when the number of pulses counted reaches a predetermined value according to the time at which the tape running speed is to be gradually slowed down.