US Patent Issued to Husky Injection Molding Systems on May 20 for "Method of improving shot repeatability in multilayer reciprocating screw injection molding machines" (Canadian Inventor)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,126, issued on May 20, was assigned to Husky Injection Molding Systems Ltd. (Bolton, Canada).

"Method of improving shot repeatability in multilayer reciprocating screw injection molding machines" was invented by Douglas James Weatherall (Bolton, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "In one aspect there is disclosed a method of improving shot repeatability in a multilayer reciprocating screw injection molding apparatus by preventing pressure communication or "cross-talk" between melt channels. In the first aspect an outlet nozzle valve is closed prior to closing a check valve within an injection unit of the multilayer reciprocating sc...