Abstract: A machine for cutting wood chips to shavings comprises a rotatable drum having circumferentially spaced cutting members connected to a feed passageway. The latter extends along a substantial portion of the length of the drum and houses feed screws forcing the chips into contact with the cutting members. The drum is surrounded by a housing with a widened portion defining a wedge-shaped cutting chamber. The formed shavings pass inside the drum in the longitudinal direction thereof to the outlet of the machine.

Abstract: Refining machine for chippings, shavings, paper pulp and the like comprising two grinding discs rotatable relative to one another and each provided with grinding bodies, forming between them a narrow slot-shaped grinding chamber. The grinding discs are so arranged that they can be displaced relative to one another for the adjustment of the size of the slot-shaped grinding chamber in order to compensate for the wear of the grinding bodies. Means is provided to cause the grinding discs to approach one another continuously at a predetermined rate during the period the machine is in operation.

Abstract: A refining machine for fragmented beating material comprises a rotationally symmetric, annular infeed channel for the beating material, the infeed channel being formed between a central body and an outer part surrounding the central body. The annular infeed channel has a gradually increasing inner and outer diameter in the feed direction of the beating material, and the central body and outer part are rotatably mounted relative to each other, each supporting its own annular part of a beating means which is arranged to be passed by the beating material after being fed through the infeed channel. The infeed channel redirects the movement of the beating material essentially radially outwardly in relation to the center of rotation of the beating means.