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
1985-12-09
1988-12-06
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
26417716, 26417717, 264323, 425363, 425461, B29C 4222
Patent
active
047895144
ABSTRACT:
In accordance with the process of and apparatus for practicing the instant invention, biaxially oriented polymer sheet is produced by flowing and advancing a polymer workpiece between pairs of opposed working surfaces which converge in the "X" direction while diverging in the "Y" direction. The surfaces which converge in the "X" direction are provided with protruding working surfaces which squeeze the workpiece laterally as the workpiece advances longitudinally. The protruding working surfaces force the material of the workpiece to expand to the full width of the working surfaces while minimizing limitations due to friction between the surfaces of the die and the workpiece. In accordance with a first embodiment of the invention, the apparatus and process utilize an extrusion die to effect the transformation of stock into flat sheet polymer material. In accordance with a second embodiment of the invention, the apparatus and process utilize a pair of opposed belts supported by convex rollers to effect the transformation of stock into sheet. The sheet produced by the process and apparatus has uniform strain distribution over the width thereof and through the thickness thereof.
REFERENCES:
patent: 1821552 (1931-09-01), Kirschbraun
patent: 1952038 (1934-03-01), Fischer
patent: 2611150 (1952-09-01), Goulding, Jr.
patent: 2732591 (1956-01-01), Whittum
patent: 3354023 (1967-11-01), Dunnington et al.
patent: 3478138 (1969-11-01), Friesner
patent: 3499957 (1970-03-01), Ancker
patent: 4151245 (1979-04-01), Suzuki
patent: 4235834 (1980-11-01), Vetter et al.
patent: 4282277 (1981-08-01), Austen et al.
patent: 4596523 (1986-06-01), Whitehead
Aluminum Company of America
Lowe James
LandOfFree
Methods of producing biaxially oriented polymer sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods of producing biaxially oriented polymer sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of producing biaxially oriented polymer sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1493010