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:
Aug. 07, 2001
Filed:
Aug. 17, 1998
Nelson E. Malwitz, Brookfield, CT (US);
Sealed Air Corp. (US), Saddlebrook, NJ (US);
Abstract
A method and apparatus are disclosed for producing polyurethane foam without the assistance of any through-flow mixing device for the precursor components. Air or other safe gas is mixed with a polyol-containing precursor to form a froth, and the froth is directed in a stream via a dispenser into a free space at a first predetermined rate of flow. Liquid isocyanate-containing precursor is directed in a stream via a dispenser at a second predetermined rate of flow into the free space so as to contact and mingle with the stream of froth. The mixed components then fall together into a container where they react to form polyurethane foam. Mixing of the streams is facilitated by a target upon which the two streams impinge in close proximity to each other.