The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1978
Filed:
Sep. 16, 1974
Jan Baptist Van Cappellen, Berchem, BE;
AGFA-Gevaert, N.V., Mortsel, BE;
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.