Differential velocity extrusion

Details Differential velocity extrusion Differential velocity extrusion

B - Operations, Transporting

29

C

B29C 47/12 (2006.01) B29C 47/06 (2006.01) B29C 47/08 (2006.01) B29C 47/92 (2006.01) E04H 4/00 (2006.01) B29C 47/22 (2006.01)

Patent

CA 2313307

A method of an extruded membrane of solidified flowable material having a desired curvature comprising extruding flowable material through a die in a curved section; measuring a characteristic of said extruded material at a plurality of positions along said die slot; comparing said plurality of measurements against a desired plurality of measurements respectively at each said position along said die slot and generating a plurality of signals respectively in response thereto; effecting a change in said measured characteristics of said extruded material at said positions along said die slot in response to said signals so as to produce said extruded material having a desired curvature.

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