Abstract: This patent application describes a method to produce wood chips with the intention of reducing the energy consumption in the subsequent process steps for pulp production. With the present method wood chipping is done in a wood chipper where the chipping tool (3) has an angle ? (4) within the interval of 75° to 105° between the fibre direction of the log and the side of the tool which faces the chip (2). Angles in this interval will cause an axially directed compression of the chip which will cause a cracking of the wood during chipping.

Abstract: A method and a device for performing spot heating of a body, particularly for brazing hard solder gold alloys. In said method an article, for example of a hard solder gold alloy, which is to be heated to a predetermined temperature, is positioned in the focal point of one or more reflecting partial ellipsoids, in whose other focal point or focal points, respectively, an appropriate lamp, for example an IR lamp, is disposed. The radiated heat of the IR lamps causes the article to be heated rapidly and intensely. Temperature control can be carried out subjectively by observing the melting of the solder through a window or alternatively by means of a thermocouple connected to the article. The device of the invention comprises a chamber having an airtight glass cover. On top of this a heating unit is placed consisting of one or more ellipsoid-shaped casings each having an IR lamp in its focal point.