Apparatus for the biaxial orientation of a deformable sheet material
Patent 4384392 Issued on May 24, 1983. Estimated Expiration Date: 
December 30, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 30, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 458678 469256 2582165 2719323 3055048 3172150 3283981 InventorAssigneeApplicationNo. 06/221240 filed on 12/30/1980US Classes:26/72, Biaxial expansion26/106, Including heater or dryer26/92, With heater or dryer264/290.2, Biaxial or transverse to travel direction425/66CONTINUOUS FILAMENT FORMING OR FILM CASTING MEANS WITH STRETCHING MEANS COMPRISING PRODUCT ADVANCING MEANSExaminersPrimary: Mackey, Robert R.Attorney, Agent or FirmInternational ClassesB29C 55/14 (20060101)B29C 35/04 (20060101) AbstractThe present invention is an apparatus for biaxial orientation of precrystalline polyacrylonitrile polymer sheet consisting essentially of a machine direction orientor which stretches the sheet in the machine direction a transverse direction orientor which stretches the sheet in the direction 90° to the machine direction, both processes of which may be completed rapidly in a heated essentially aqueous environment. | |
