The invention relates to a transfer device for transferring products in an industrial processing line for the in-line processing of products, between a collecting surface and a transit zone running alongside the collecting surface, said transit zone comprising at least two longitudinal conveyors spaced away from a slider bed and each intended to transport a file of products, said device comprising said collecting surface, said transit zone, and a transfer tool transferring between the collecting surface and the transit zone, equipped with at least three longitudinal vertical walls, and intended to push, transversely, longitudinal rows of products which rows are each positioned between two walls. This device is wherein at least one wall of the transfer tool is mounted with the ability to move translationally on said tool in a transverse direction, for a movement of pushing said products. Other subjects of the invention are corresponding methods.