WILLIAM R PENROD
Engineers in Harrison, IL
License number
Pennsylvania PE012565L
Category
Engineers
Type
Professional Engineer
Address
Address
2
Harrison, IL 61072
Pennsylvania
Pennsylvania
Professional information
Odor Elimination Apparatus For Extruded Plastic
US Patent:
4069092, Jan 17, 1978
Filed:
Nov 22, 1976
Appl. No.:
5/743804
Inventors:
Stanley C. Zink - Beloit WI
William R. Penrod - Rockton IL
William R. Penrod - Rockton IL
Assignee:
Beloit Corporation - Beloit WI
International Classification:
B29D 302, B29D 304, B29D 308
US Classification:
156500
Abstract:
Odor elimination process for plastic film in which at least two extruded plastic films are combined outside of the die. The process utilizes a valve adapting a single extruder to supply two melt streams to a dual melt chamber dual slot die. One melt chamber of the dual slot die is heated to a temperature below the temperature of oxidation of the resin of the thermoplastic material extruded through the die. The other melt chamber is heated above the oxidation temperature of the thermoplastic material extruded through the die, to increase the adhesive qualities of the extruded film to effectively bond with the thermoplastic material heated to a low temperature. The two films are then combined and the high temperature film is sandwiched between the low temperature film and a substrate, trapping the odor of the high temperature film. In a modified form of the invention, the film heated to a high temperature is passed through a tortuous path and heated to its high temperature while passing through this path.