Blast Finishing Machine

Author:  Raymond Leliaert
Source:  US Patent 2,924,911
Doc ID:  1960012
Year of Publication:  1960
Abstract:  
This invention relates to blasting processes such as are used for abrading, peening, polishing, cleaning, surface hardening and the like. More particularly the invention relates to improved means for sealing the work piece passages or other openings into the chambers or enclosures within which such blasing operations are performed.