Calendering of synthetic plastics film

Details Calendering of synthetic plastics film Calendering of synthetic plastics film

1974-09-13

1976-06-22

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means casting fluent stock operably associated with shaping...

72160, 164282, 264 76, 264175, 425335, 425DIG235, B29D 714

Patent

active

039648486

ABSTRACT:
A method of and calender for calendering synthetic plastics film, particularly PVC film, wherein the total roller looping distance of the film around the rolls of the calender is reduced having regard to known five-roll calenders by providing that the material to form the film is fed into a roller gap between a first roller and a third roller, with the first roller set at the same height as the third roller, the film is looped around the third roller for three quarters of the circumference thereof and, during such looping, passes through a second roller gap between the third roller and a second roller disposed beneath the third roller and through a third roller gap between the third roller and a fourth roller disposed above the third roller, the film then being looped around the fourth roller for three quarters of the circumference thereof and, during such looping, passes through a fourth roller gap between the fourth roller and the fifth roller mounted above the fourth roller, the calendered film then being pulled off from the fourth roller.

REFERENCES:
patent: 2258659 (1941-10-01), Mosler, Jr.
patent: 2277313 (1942-03-01), Fowler
patent: 3007207 (1961-11-01), Salhofer
patent: 3366992 (1968-02-01), Seanor et al.
patent: 3499957 (1970-03-01), Ancker
patent: 3566638 (1971-03-01), Herbst
patent: 3570288 (1971-03-01), Fischer
patent: 3578766 (1971-05-01), Diolot
patent: 3587267 (1971-06-01), Townsend

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