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:
Dec. 10, 2002
Filed:
Oct. 25, 2000
Van I. Doesburg, Dalton, GA (US);
Textile Rubber & Chemical Company, Inc., Dalton, GA (US);
Abstract
The present invention relates to a method and apparatus for forming a layer of blown cellular polyurethane on a textile material, such as a carpet backing. The method includes applying to a textile material a layer of reactive polyurethane forming agents containing a sufficient amount of water or heat-sensitive blowing agent so as to cause chemical blowing of the mixture when heated sufficiently, heating the layer so as to cause chemical blowing of the mixture and applying to the layer during the chemical blowing thereof a pressure of an amount and for a time sufficient to control the blowing of the mixture to a desired degree, the pressure being applied to the mixture continuously from an initial pressure to a final pressure, wherein said initial pressure is greater than the final pressure. Apparatus for performing the process is also disclosed.