Process and apparatus for loosening bark from logs

Details Process and apparatus for loosening bark from logs Process and apparatus for loosening bark from logs

1976-09-27

1978-04-25

Smith, Gary L.

Woodworking

Bark rosser

Tree climber

144311, 100 37, 100 95, 100131, B27L 100

Patent

active

040857832

ABSTRACT:
The invention provides processes and apparatus for removing bark from logs. The logs are subjected to mechanically applied compression forces acting against the sides of the logs, these forces being such as to expel juices from the ends of the logs. The pressure on a log is preferably between 500 and 3,000 p.s.i. per square inch measured on the area of the diametrical plane of the log. This compression provides loosening the bark which can then be readily removed. Preferably, a stack of logs is simultaneously compressed by means of a hydraulic press, and the juices which are expelled from the ends of the log are collected for sale as a by-product. The loosened bark on the log is then removed by a mechanical frictional treatment.

REFERENCES:
patent: 163403 (1875-05-01), Pfeffer
patent: 1403072 (1922-01-01), Cheney
patent: 1677963 (1928-07-01), Ford
patent: 2576966 (1951-12-01), Pauley
patent: 2963960 (1960-12-01), Pirie
Appleton Wis. Inst. of Paper Chemistry, Bibliographic Series No. 190, Supplement II, Entry 210, 1972 (Simonov).
Appleton Wis. Inst. of Paper Chemistry, Bibliographic Series No. 190, Revision 79, 1960, Entry 778 (Wultsch).

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