Patent ID: 7967664

Claim:
Device for cleaning, activation or pre-treatment of work pieces by means of a gas flow comprising a blast device with adjustable feed attachments and pressure sources for a carrier gas, an agglomeration chamber for creating carbon dioxide snow crystals and a mixing device for the carrier gas and carbon dioxide, as well as an outlet nozzle attached and extending from the mixing device, characterized by the fact that— a feed attachment ( 3 ) for the carrier gas is designed as a blast tube ( 4 ) extending into the mixing device ( 1 ), the agglomeration chamber ( 8 ) designed as a tube with inner serration ( 27 ) has a dispenser opening ( 7 ), which opens out into an annular space ( 10 ), and the mixing device ( 1 ) has a plurality of mixing chambers and an outlet opening ( 13 ) at a first end, which opens out into the outlet nozzle, wherein one of the mixing chambers is the annular space ( 10 ) and located at a second end of the mixing device ( 1 ).