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:
Nov. 26, 1996
Filed:
Jan. 11, 1996
Carlo Fiorentini, Saronno, IT;
Abstract
An apparatus and a process for the production of frothed polyurethane foams: the reactive polyurethane components are mixed with a liquid low-boiling blowing agent and a nucleation gas by a mechanical mixer under pressure controlled conditions in a mixing chamber to keep the blowing agent in the liquid state and cause a fine dispersion of the nucleation gas. The reactive polyurethane components, the blowing agent and the nucleation gas are mixed by reverse flowing the mixture in respect to centrifugal forces generated by a rotor member in the mixing chamber, and by subjecting the same mixture to repeated stirring and whirling actions while it is flowing towards a central discharge outlet and circulating in a radially extending annular path, between facing surfaces of the rotor member and a bottom wall of a mixing chamber provided with intermeshing sets of axially extending pegs.