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:
May. 16, 1989
Filed:
Sep. 30, 1987
Applicant:
Inventors:
Benjamin R Hannigan, Lakehurst, NJ (US);
Jose R Fernandes, Avenel, NJ (US);
Assignee:
Rutgers, The State University, Piscataway, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B03B / ; B03B / ;
U.S. Cl.
CPC ...
209-3 ; 209 17 ; 209173 ; 2091725 ; 241 24 ; 241D / ;
Abstract
Plastics fragments including polyethylene terephthalate and polyolefins derived from comminution of containers such as beverage bottles are segregated according to specific gravity by flotation. The flotation liquid includes a surfactant to facilitate complete separation of the light and heavy plastic fractions from one another. The surfactant may be a residue of a detergent used to wash the flakes and remove contaminants therefrom. Rinsing prior to flotation separation is controlled so as to leave the desired detergent residue leading to a marked reduction in rinse water requirements.