Abstract: A winding device, comprising a ring-shaped holder disposed concentrically with a winding shaft, a ring-shaped slider fitted onto the outer peripheral surface of the holder, and a plurality of chips disposed at angular intervals on a tapered inclined surface formed on the outer peripheral surface of the slider, wherein a fluid pressure passes through a first flow path in the winding shaft, the slider is moved in the axial direction of the winding shaft by a first piston, each chip is moved in the radial direction of the winding shaft by the inclination surface of the slider and pressed against the inner peripheral surface of the winding core so as to hold the winding core, a second piston is pressed against the end face of the holder by a second flow path independent of the first flow path, and the torque of the winding shaft is transmitted to the holder, slider, chips, and winding core by the friction between the second piston and the holder so as to rotate the winding core.

Abstract: A winding core fixing device of simple structure, wherein a plurality of pivot shafts (7) are swung about pins (6) thereof according to the rotation of a winding shaft (3), and one rotating body among rotating bodies (8) at both ends of the pivot shaft is pressed against the inner peripheral surface of a winding core (1), whereby the winding core is fixed.

Abstract: An apparatus for winding a web material such as paper or plastic film about a hollow core. The core is disposed between a pair of shafts spaced from and axially opposed and aligned with each other. The core is fixed at opposite ends to the shafts respectively. At least one of the shafts is connected to and rotated by a motor. Each of the shafts is comprised of an annular slide disposed around and coaxially to the shaft for axial movement relative to the shaft, and tapered surfaces formed on the circumferential outer surface of the slide. A plurality of tins are angularly spaced from each other along the circumference of the slide and engaged with the tapered surfaces. The tips are radially movable relative to the shaft.

Abstract: An apparatus for slitting a web material such as paper, plastic film and the like into a plurality of web materials and then winding the web materials to form a plurality of rolls, the rolls being divided into two groups, one group of rolls being arranged side by side and coaxially to each other at the front of the apparatus, the other group of rolls being arranged side by side and coaxially to each other at the rear of the apparatus. Tracking rollers are disposed on the upper side of one group of rolls and the upper side of the other group of rolls. Actuators press the tracking rollers against the corresponding groups of rolls with a contact pressure therebetween. One group of rolls and the other group of rolls are supported by carriages. Drives moves the carriages downwardly in response to the increases in diameters of the rolls to thereby enable the rolls to increase in diameters.

Abstract: A roll slitting and rewinding machine apparatus for exchanging rewound rolls comprises a frame holding a plurality of slitted strip rewinding roll supporting means arranged in two rows and a carrier rotatably supporting said frame so that said frame is movable from a vertically arranged position and a horizontally arranged position. The carrier being movable from a forward position to a retracted position, whereby when said carrier takes said forward position with said frame taking said first position the rewinding rolls are in condition of rewinding operation while when said carrier takes said retracted position with said frame taking said second position the rewinding rolls are removed from their respective support means.

Abstract: An apparatus for independently and simultaneously rewinding a plurality of slit strips into rolls is provided for a slitting and rewinding machine. The apparatus includes a single elongated contact roller and a plurality of rewinding cores. The rewinding cores are arranged side by side in at least one row parallel to the axis of the contact roller. Each rewinding core is independently supported for rotation by at least one vertically extending support arm. The support arms for the rewinding cores are in turn pivotally connected to a common support base which is adapted to be positively retracted horizontally away from the contact roller. During rewinding operation, as the diameter of strip rolls wound onto the rewinding core increases, the core support arms are moved angularly from their vertical position.

Abstract: A method and apparatus for driving a plurality of strip rewinding shafts or cores are provided. The apparatus includes a plurality of hydraulic motors for separately driving a plurality of strip rewinding shafts or cores. The hydraulic motors are connected parallel with a common hydraulic pump to be independently and simultaneously driven by the pump. The hydraulic pump is in turn connected to a DC electric motor, the operation of which is controlled by a torque control to provide an output rotation of a desired torque characteristic. Also connected to the input of the torque control are means for setting the rotational speed of the DC motor, means for detecting the diameter of at least one strip roll being wound and means for detecting the output rotation of the DC motor.

Abstract: Apparatus for holding cylindrical winding cores comprises a plurality of core holders and a plurality of friction collars are mounted alternately on a single hollow shaft under axial pressure, each of friction collars being allowed to be axially moved and constrained in rotation and each of said core holders having radial expansible means which are radially expanded by an air pressure supplied through the hollow shaft to come into pressure engagement with the inner surfaces of cylindrical winding cores disposed about core holders.

Abstract: Apparatus for applying leading tips to a continuous sheet material and then cutting the same comprises a rotatable cut drum, a cutting knife contained in the cut drum and adapted to be caused to project outwardly through the surface of said cut drum at a fixed position while said knife is rotating together with the cut drum, a cam mechanism secured to a stationary member outside the cut drum for actuating said cutting knife, a single position clutch adapted to be rotated in synchronism with the cut drum, a mechanism adapted to be driven through said single position clutch for applying leading tips to the continuous sheet material, the arrangement being such that the continuous sheet material is fed along said leading tip applying mechanism and the outer periphery of the cut drum as the cut drum is rotated and that said single position clutch is energized into its connectible condition at predetermined time during the operation, while said cam mechanism is switched to a cammable condition in which it is able t

Abstract: An apparatus for suppressing the rotational fluctuation of a supply roll includes a drive source and a differential gear. The drive source is operatively connected to the first input shaft of the differential gear and a support shaft for the supply roll is operatively connected to the second input shaft via a variable speed gear. The output shaft is joined to both a hydraulic coupling and a control for the variable speed gear. A high frequency fluctuation of the rotation of the supply roll causes a forward or reverse rotation of the output shaft of the differential gear. The hydraulic coupling acts to retard the output shaft rotation thereby causing a braking or driving force to be applied through the differential gear to the supply roll for eliminating the rotational fluctuation of the supply roll.