Patent ID: 9242313
Filing Date: 2016-01-26
CPC Classification: B23K,F27B,F27D

Claim Text:
1. A welding apparatus comprising: a first enclosure arranged to receive an article to be processed; a heating system arranged to heat the article to be processed in the first enclosure; a first enclosure door into the first enclosure arranged to selectively allow access to the first enclosure through a first side of the first enclosure; an atmosphere control system arranged to provide a substantially inert atmosphere in at least the first enclosure, the atmosphere control system including a sealing system arranged to retain a desired atmosphere in each enclosure under control of the atmosphere control system; and a viewport assembly on a second side of the first enclosure, the viewport assembly including a neck attached to the second side of the first enclosure, the neck extending from the second side of the first enclosure to an end wall of the viewport assembly that includes a window made of a high-temperature-resistant, substantially transparent material and arranged to allow viewing of the first enclosure from outside the first enclosure, the viewport assembly further including at least one access port through which access to the first enclosure is selectively gained by a user and through which a welding device is selectively controlled.