Abstract: An installation for the treatment of products in bulb or tuber form in relation to the removal of the outermost layer thereof, comprising a channel through which the products can be transported between an inlet and an outlet that are at different levels, which channel is delimited by a first series of rotary treatment elements arranged alongside one another and extending transversely to the direction of transport, and by an opposing boundary opposite the series of treatment elements. The opposing boundary is determined by a second series of rotary treatment elements while the input is at a higher level than the output.

Abstract: Apparatus for treating the surface of bulbous or tuberous crops, comprising a substantially tubular treatment channel inclining upwards in the main direction of transport and comprising a top wall and a bottom wall, the bottom wall being made up of a number of drivable parallel rollers provided with treatment elements, and the top wall consisting of the lower part of a drivable endless conveyor. For the purpose of modifying the channel height, the top wall and the bottom wall are movable relative to each other longitudinally as well as perpendicularly. The lowermost rollers can form a receptacle reaching as far as before the foremost point of the conveyor belt.