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:
Jul. 24, 1979
Filed:
Dec. 19, 1977
Albert M Sciaky, Palos Park, IL (US);
Sciaky Bros., Inc., Chicago, IL (US);
Abstract
A vacuum sealing means for a high production electron beam welding machine incorporating a rotary indexing table carrying parts to be welded from a loading position to a welding position under a stationery electron beam gun and then to an unloading station. Sealable pockets on the rotating index table carrying the parts to be welded are carried through a sealed off low volume space into a first pre-pumping station where air in the pocket is brought to a pressure intermediate between the atmospheric pressure and the pressure required during the welding of the parts. After pre-pumping, the pockets are indexed to a second pumped area where the pocket is evacuated to the pressure suitable for welding. The table is then indexed through an area at the pre-pumping pressure and then through another sealed off space at atmospheric pressure to the ejection station. The first and the last sealed off spaces at atmospheric pressure are means for preventing a large volume intake of air from the atmosphere surrounding the machine into the pumping system.