Process for producing a plastic sheet having parallel ribs extru

Details Process for producing a plastic sheet having parallel ribs extru Process for producing a plastic sheet having parallel ribs extru

1974-08-07

1978-07-18

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264237, 264348, B29F 308

Patent

active

041016203

ABSTRACT:
A process for the production of bilaterally corrugated plastic sheets by extruding a plastic synthetic resin composition, preferably soft PVC, from a slotted nozzle fashioned in a double comb-like shape, stretching the sheet in the longitudinal direction of the ribs during the drawing-off process and passing the sheet through a cooled glazing or smoothing calender. Also disclosed are various sheets produced by the above-process as well as methods for joining the same together.

REFERENCES:
patent: 3164948 (1965-01-01), Stratford
patent: 3324217 (1967-06-01), Armstrong et al.
patent: 3478138 (1969-11-01), Friesner
patent: 3547891 (1970-12-01), Snead et al.
patent: 3574809 (1971-04-01), Fairbanks et al.
patent: 3594870 (1971-07-01), Schippert

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