Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Patent
1985-04-23
1987-01-27
Czaja, Donald
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
29116AD, 264 406, 264 407, 264175, 425143, 425367, 425368, 425DIG235, 427130, B29B 1302, B29C 4324, B29C 4346
Patent
active
046393463
ABSTRACT:
A magnetic audio or video tape is smoothed and/or otherwise treated by causing it to pass through one or more calenders wherein a large-diameter primary calender roll is heated from within and the major part of its peripheral surface is surrounded by the running tape. The primary roll rotates about a fixed axis and is surrounded by a cluster of two or more smaller-diameter secondary calender rolls each of which has a viscoelastic peripheral layer and each of which can be individually biased against the adjacent portion of the running tape with a selected force. The magnetic film on the tape is out of contact with the secondary rolls as well as with the guide rollers which cause the tape to advance toward the peripheral surface of the primary roll and thereupon toward a takeup reel.
REFERENCES:
patent: 3074114 (1963-01-01), Petry
patent: 3254593 (1966-06-01), Beachler
patent: 3358321 (1967-12-01), Seanor et al.
patent: 4124349 (1978-11-01), Lehmann
patent: 4520723 (1985-06-01), Pav et al.
Pav Josef
Rauf Richard
Svenka Peter
Wenzel Reinhard
Czaja Donald
Kleinewefers GmbH
Kontler Peter K.
Tentoni Leo B.
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