Differential velocity extrusion
AssigneeIndustrial Evolution, Inc.
InventorWilliam J. Slyne
Life of this patent
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Abstract
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.
Claims11
A method of producing an extruded membrane of solidified flowable material having a desired curvature comprising:
- (a) extruding flowable material through a die slot having a curved section;
- (b) measuring a characteristic of the ejection rate of said extruded material at a plurality of positions along said die slot;
- (c) 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;
- (d) effecting a change in said measured characteristic 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.
A method of producing an extruded membrane of solidified flowable material having a desired curvature comprising:
- (a) extruding flowable material through a die slot having a curved section;
- (b) measuring the velocity of said extruded material at a plurality of positions along said die slot.
- (c) comparing said plurality of velocity measurements against a desired plurality of target velocity measurements to produce an error signal;
- (d) changing the velocity of the flowable materal at each said plurality of positions in response to said error signal so as to produce an extruded membrane having a desired cuvature.
Dependencies are inferred from the claim text.