METHOD AND ARRANGEMENT FOR SHARPENING SAW CHAINS, WHEREBY A CONTINUOUSLY MOVING CHAIN CAUSES A TRANSVERSE MOTION OF ONE OR MORE FILES

Fur users of motor driven saws with endless tooth carriers it is known that these teeth should be filed rather often in order to keep the saw well cutting. Auxiliary devices are known for facilitating the filing work, and also for controlling the direction of the filing, which should form a certain angle with the cross direction of the teeth. It is common for the known auxiliaries that what is filed is one temporarily fixed tooth at a time, whereby the filing work will still be time consuming and difficult. The invention provides for an entirely new principle and apparatus for a continuous filing of the teeth (18) on an endless saw cutter (7), in that a filing is effected by means of files (14) moved in a one-way motion in engagement with teeth (18) moved along the chain blade (7), said file (14) being held in a desired oblique position relative to the tooth for filing the latter under a desired cutting angle (v) and being moved in a direction oblique to the chain blade such that the file (14), during movement of the chain, will carry out a pure longitudinal displacement relative to the tooth.