The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2023
Filed:
Dec. 03, 2019
U.s. Government As Represented BY the Secretary of the Army, Dover, NJ (US);
Nikolaos Ioannidis, Bloomfield, NJ (US);
Zohar Ophir, West Orange, NJ (US);
Viral Panchal, Parlin, NJ (US);
Philip Abbate, Hackettstown, NJ (US);
Francis Sullivan, Morristown, NJ (US);
Ming Wan Young, Basking Ridge, NJ (US);
Costas G. Gogos, Wyckoff, NJ (US);
The United States of America as Represented by the Secretary of the Army, Washington, DC (US);
Abstract
The present invention is directed to a continuous process for producing a foamable celluloid product by introducing a solid component (comprising nitrocellulose, chemical blowing agent (CBA), stabilizer and alcohol) and a liquid component (comprising camphor and acetone) into a mixer/devolatilizer machine where the chamber is under atmospheric pressure and having significant overhead space. The chamber is comprised of two zones wherein the first zone has a temperature that is less than the second zone and at least one rotor comprising hollow, temperature-controlled arms having a tilted angle affixed to the rotors. The rotors of the mixer/devolatilizer machine act to mix the solid and liquid components under lower shearing forces, lower mechanical stress and longer residence times than those used by twin-screw extruders.