Abstract: A metal vapor generator of the present invention is constituted to locate an airtight joint between a body with an opening around its top and a bottom plate, in the vicinity of the lower portion of the body. According to such an arrangement, since said airtight joint locates at a side where a powder metal depositing material such as copper, aluminum or the like is filled up within the vessel and whose particle size of the depositing metal material is large, penetration of the particles into the airtight joint is reduced, thereby facilitating the detachment between the bottom plate and the body.

Abstract: A continuous vacuum treating apparatus for subjecting a workpiece of soft material, such as a plastic molding to continuous surface treatment by an air-to-air system in vacuum, including a vacuum treating chamber and a plurality of auxiliary vacuum chambers located anterior and posterior to the vacuum treating chamber. The diameter of each of an upper seal roll and a lower seal roll of each of the auxiliary vacuum chambers located on the vacuum treating chamber side is smaller than the diameter of each of an upper seal roll and a lower seal roll of the auxiliary vacuum chamber located closest to the atmosphere.