STEP 17

Nei brevetti

To the research of a patent i choose 'Turquoise scrubber'.Comprising a base and a casing upstanding from the base and having closed and open ends. A motor driven shaft extends through the casing centrally thereof and is journalled in supports upstanding from the base.
The present invention has to do with a machine for scrubbing turquoise to remove a gel which collects thereon as an incident to chemical treatment of the turquoise for conditioning purposes and is concerned primarily with such a scrubber which may be operated with a high degree of safety to personnel and also with a high degree of efficiency.

Code: US 3974538 A

 

Font:
http://www.google.tl/patents/US3646072