B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/6
B23K 15/00 (2006.01) B23K 15/06 (2006.01) H01J 37/18 (2006.01)
Patent
CA 1125863
ABSTRACT OF THE DISCLOSURE SLIDING VACUUM SEAL MEANS WITH AIR INRUSH REDUCING SEALS A vacuum sealing means for a high production electron beam welding machine incorporating a rotary indexing table carrying parts to be welded from a load- ing 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 inter- mediate 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 pres- sure 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.
316273
Osler Hoskin & Harcourt Llp
Sciaky Bros. Inc.
LandOfFree
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