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:
Apr. 01, 1986
Filed:
Apr. 05, 1985
Sahibzada S Laiquddin, Dorsten, DE;
Gunter Stemmer, Essen, DE;
Ruhrgas Aktiengesellschaft, Essen, DE;
Abstract
A method of operating a controlled atmosphere furnace. To prevent the entry of oxygen into the controlled atmosphere in the chamber of the furnace, which has a furnace door for the receipt and removal of parts by means of a feeding and removal device, the device is designed to seal a vestibule located immediately in front of the furnace door when the device approaches the furnace door. The oxygen-containing ambient air thus trapped in the vestibule is then removed therefrom. The furnace door is opened, and the feeding and removal device, while still sealing the vestibule from the ambient air, then moves into the furnace chamber for feeding or removing the part which is to be heat treated.