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. 22, 1985
Filed:
Nov. 15, 1982
Albert H Steinberg, Morris Plains, NJ (US);
Frank Petruccelli, Boonton, NJ (US);
Mariann E Lucas, Budd Lake, NJ (US);
Lev Zlatkevich, South Orange, NJ (US);
Allied Corporation, Morris Township, Morris County, NJ (US);
Abstract
A method of rotationally molding a multi-layered article. The outer layer is first rotationally molded and solidified. An inner polymer layer is fed into the mold cavity and an inner layer is rotationally molded to the inner surface of the outer layer. Preferably, the outer layer and inner layer are thermoplastics. The outer layer polymer has a melting point higher than the inner layer polymer. The outer layer is rotationally molded and cooled to below its melt temperature but above the melt temperature of the inner layer polymer. The inner layer is then rotationally molded while the outer layer remains solid.