The invention relates to an automatic packing device for the filling of containers by means of products, comprising: two separate feed stations, each adapted to arrange a stream of products in parallel rows; pickup means (20, 21) capable of picking up alternately, in each feed station and depositing in the container, a number of products forming a layer of the container. Each feed station comprises: a conveyor having a plurality of articulated transverse profiles (2, 3); means (5, 6) for pivoting the profiles capable of pivoting two successive profiles in opposite directions of rotation between a first position in which the said profiles form a transverse trough in the shape of a V, and a second position in which the said profiles form a ridge in the shape of an inverted V, so as to form waves of products on the conveyor; a plurality of channels disposed as a longitudinal continuation of the conveyor.