Blown film extrusion equipment maker Addex Inc. of Stough¼ton, Mass., has received a patent covering a method of correcting blown film thickness variations.
Addex uses the technology in its automatic Model EGC and manual MGC air rings. Both control the air volume of the Addex air ring-based system. Just two motors activate all movable parts in the automatic EGC system, reducing the need for maintenance.
The automatic system comes with direct-contact or air-cushioned capacitive thickness sensors, or an air-cushioned nuclear sensor.
Tel. 781-344-5800, fax 781-344-5766.