Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – With prevention of equipment fouling accumulations or deposits
Patent
1974-09-16
1978-01-03
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
With prevention of equipment fouling accumulations or deposits
264210R, 264216, 264237, 425224, 425325, 425379R, B29D 724
Patent
active
040667294
ABSTRACT:
A process and apparatus for making relatively thin amorphous film in which a molten film, which is extruded from a slot orifice, is drawn over a cooled control roller spaced from the orifice at its point of contact with said film at a distance not more than about 20 mm before it is received on a quenching drum maintained at conventional quenching temperature below the solidification range of the molten film, the speed of rotation of the quenching drum is in excess of the rate of extrusion of the molten film, the diameter of the control roller is less than one-quarter of the diameter of the quenching drum, and the temperature of the film control roller is maintained at least about ambient room temperature but less than the quenching drum temperature to thereby provide a skin at the directly proximate stratum of film contacting the control roller surface.
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Agfa-Gevaert N.V.
Daniel William J.
Thurlow Jeffery R.
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