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US 4,805,678 AGranted
Method and apparatus for pretreating and debarking logs
AssigneeBeloit Corporation
InventorEugen E. Kutilin
Life of this patent
Estimating the term…
Abstract
An apparatus for pretreating and debarking logs wherein the log is debarked by a plurality of cutting elements disposed at an angle to the longitudinal extent of the log and offset with respect to each other. The cutting elements include top and bottom cutting elements between which the log is rolled, imparting helical slits thereto.
Claims23
An apparatus for removing a bark layer from a log comprising:
- a first cutting bed means for slitting the bark layer on the log in a first series of generally helical cuts;
- a second cutting bed means for scoring the bark on the log in a second series of generally helical cuts;
- said first and second cutting bed means being oppositely facing and each having a plurality of parallel, spaced cutting members disposed relative to each other, so that said first and second sets of generally helical cuts intersect perriodically around the log circumference, thereby defining discrete bark pieces of nominal size;
- means for rolling logs between said beds with the longitudinal extent of said logs being disposed at an angle with respect to said cutting members, and
- scraping means for dislodging the discrete bark pieces from the log.
2 more elements
An apparatus for pretreating a log prior to removing bark therefrom comprising:
- first cutting bed means for slitting the bark;
- second cutting bed means for slitting the bark in cuts intersecting with cuts made by said first cutting means;
- said first and second cutting bed means being oppositely facing, and each bed including a plurality of parallel spaced cutting members disposed at an angle with respect to a log being pretreated;
- means for causing relative movement between a log being pretreated and said first and second cutting means, causing the cuts made by said cutting means to surround the log.
1 more element
A method for removing back from a log comprising:
- scoring the log in a first set of substantially parallel helical cuts penetrating the bark layer;
- scoring the log in a second series of generally parallel helical cuts penetrating the bark layer, said second series of cuts intersecting with said first series of cuts to define discrete bark pieces;
- rolling the log between cutting means for simultaneously performing said first and second scoring steps;
- and
- scraping the discrete bark pieces from the log.
2 more elements
Dependencies are inferred from the claim text.