Abstract: Debarking/delimbing apparatus, especially for softwood, comprises at least one spool device mountable so as to be rotatably driven about an axis and capable of removing bark from tree parts moved lengthwise relative to said device across its axis, with each spool device comprising a rotor carrying one or more pairs of elongated debarking elements each having debarking teeth. At least in operation of the apparatus, each of the debarking elements is in the form of a helix or near helix expanding from a minimum diameter at a central region of the rotor to a maximum diameter away from the central region, these elements protruding from the rotor so that, in most angular positions of the rotor, a tree part is cradled between two debarking elements and contacts the spool only on one area of each debarking element of a pair. The debarking elements may be in fixed helical form, or may be flexibly mounted and capable of assuming a near helical form.

Abstract: Debarking/delimbing apparatus comprises at least one spool device mountable and rotatably driven about an axis and capable of removing bark from tree parts moved lengthwise across its axis. Each spool device has two end members rotatable about the axis and each of which supports the ends of several shafts which extend between the ends members parallel with the axis and equally spaced from and around the axis. Each of said shafts has, spaced along its length, a series of solid debarking elements, each element being eccentrically and rotatably mounted on its respective shaft so that when the spool device is rotated centrifugal forces will cause the elements to project outwardly from the device so as to contact tree part, the elements being provided with protrusions for scraping off bark. The spool device is arranged so that all of said elements are completely rotatable about said shafts without interference with each other or with any part of the device.