Patent ID: 6402366
Filing Date: 2002-06-11
Classification: B08B,C23G

Abstract:
A drum unit for receiving bulk material for surface treatment, including a drum having jacket walls which end at both sides at an end disk, of which one jacket wall is designed as a lid to the opened and closed for charging and discharging said drum, which lid is supported at one of its longitudinal edges for a pivoting around a pivot axis which extends parallel to an axis of rotation of said drum, which drum includes at least one stationary cam disk for a controlling of the rotational position of said lid, which lid has at least one guiding portion adapted to co-operate with said at least one stationary cam disk;said at least one stationary cam disk comprising a circumferential portion which has the shape of a circular arc and having a first end area and a second end area, which end areas are located at a circumferential distance from each other; further comprising a control recess having a first and a second end, which ends are located at a circumferential distance from each other, which first end is shaped as a lid blocking surface; which lid blocking surface is followed in turn by a first, approximately rectilinear transition portion which extends up to said first end area of said circular arc shaped circumferential portion; and comprising a second, approximately rectilinear transition portion following the second end of said control recess and extending up to said second end area of said circular arc shaped circumferential portion.