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:
Mar. 06, 1979
Filed:
Jan. 25, 1978
Karlheinz Raab, Kleinostheim, DE;
Konrad Wolff, Frankfurt am Main, DE;
Heinrich Koch, Siegburg, DE;
Paul Hagel, Hennef, DE;
Zimmer Aktiengesellschaft, , DE;
Abstract
A continuous process and apparatus for remelting fluffy, high bulk tangled polymer waste, such as nylon or polyethylene terephthalate fibers, which comprises chopping the waste into pieces 15 to 40 mm. mesh size, passing the chopped waste through a charging zone, a compressing screw, and finally an extruder. The charging zone is formed by a vertically-disposed hopper, having two opposed parallel walls and two opposed converging walls. Inside the hopper is a plurality of agitating shafts having tapered fingers that loosen and disentangle the chopped waste. The waste then is compressed to one-fourth to one-fifth its volume and transferred to an extruder where it is melted, degassed and extruded to a predetermined shape.