Agfa-gevaert Ag

Basf Magnetics Gmbh

Josef Birkmann

Bernd Scholtysik

Jose Toral

Gottfried Lutz

Friedrich Held

A winding device for magnetic tapes, in which the incoming tape (1) is guided over tape-deflecting and guiding elements (3, 4) to the tape roll (7) for winding up, a rubber roller (5) fastened to a low-mass swing arm (6) being pressed against the tape at the point at which the tape tangentially reaches the tape roll, and both the swing arm and the tape-deflecting elements being seated on a pivotal guide arm, which is guided by a pneumatic guidance according to the structure of the tape roll. In this way, a satisfactory winding profile is achieved in the case of magnetic tapes to be wound up, even at high winding speeds.

Winding device for magnetic tapes

A winding shaft is described, having self-tensioning individual winding elements (6) for winding mandrels mounted on it in such a way that they can be driven, which include in each case in an annular groove (14) of each individual winding element a compliant tensioning means, the outside diameter of which is greater than the inside diameter of the winding mandrels. The winding means comprises a plurality of cylindrical-annular segments (2) arranged on the circumference of the individual winding element in the annular groove, the end faces (13) of which segments are beveled and are mounted radially displaceably on the inner face of the intermediate pieces (3), there being seated between the inside of the segments and the bottom of the annular groove a spring element, comprising either a leaf spring or a plurality of helical springs with ball thrust pieces.

Winding mandrel tensioning means

A cutting device for layered or unlayered foil lengths, having good cut quality and an extended period of use before re-grinding of the cutter is required, consists of cylindrically shaped keyway cutter bars with distance rings lying between them, which are mounted on a blade shaft, and of roller blades of right-angles cross-section, which are equally mounted on a blade shaft and wherein each roller blade is pressed by a spring washer against the corresponding keyway cutter bar. The advantage according to the invention consists in that first each roller blade is supported on one of the cutting blades of the keyway cutter bar and that after these cutting shoulders wear off the whole roller blade shaft is turned around and in each case the other cutting shoulder is used for cutting. After these cutting shoulders too have worn off the cutting device is made usuable for further cutting operation by grinding off the cylindrical outer surface of the keyway cutter bars (FIG. 2).

Cutting device for the longitudinal cutting of foil lengths

A clamping device for hubs for winding magnetic tapes consists of a rotatably mounted block (1) mounted on a circular disc (2), the external circumference of which block is adapted to the internal bore of the winding core (6), said block containing, as clamping elements, two bushings (5,5') situated opposite each other, each of which bushings has two balls (9,9') which bear on the outside against the collar of the respective bushing (5,5') and on the inside against each other by way of a spring (10), the clamping elements being situated at some distance from the circular disc (2) so that the reel hub (6) mounted in position bears against the portion of the ball projecting from the collar of the bushing (5,5') and the bent over edge of the reel hub (6) is pressed by this spherical portion against the abutment (11) formed by the outer circumference of the circular disc (2).

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Fuerstenfeldbruck, Germany

Josef Birkmann