US Patent 7455166 Supply tube for tablets

A supply tube has a conveying channel of a substantially rectangular cross-section formed therein for successively supplying tablets, pills, capsules, dragées and similar products from a reservoir under the effect of gravity to a receptacle. The conveying channel has several successively arranged sections adjoining one another, wherein successive sections are inclined alternately in different directions with respect to a longitudinal plane of the supply tube thereby enclosing an angle of less than 45° with the longitudinal plane, and wherein the cross-section of the successive sections is distorted by an angle of up to about 90° around the longitudinal plane.