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:
Sep. 23, 1980
Filed:
Jul. 05, 1979
Ronald D Rothchild, South Orange, NJ (US);
Airco, Inc., Montvale, NJ (US);
Abstract
A chamber is isolated from ambient atmosphere by supplying a flow of inert gas to the entrance and/or exit of the chamber such as an oven for curing solvent borne resin coatings on a material passed therethrough. The inert gas is supplied at a substantially constant mass flow rate through an orifice which may be adjusted in opening or direction so as to enable the momentum of discharged inert gas to be controlled. A flow of gas is exhausted exteriorly of but in the vicinity of the chamber exit or entrance and the oxygen content of such flow is sensed. The sensed oxygen value is compared with a predetermined value and the difference is utilized to adjust the orifice to either increase or decrease the momentum of inert gas discharged therefrom. In this manner atmospheric oxygen is precluded from entering the chamber while only the amount (flow) of inert gas necessary to block such oxygen is utilized thereby minimizing the loss of inert gas from the chamber to ambient.