The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 1983
Filed:
Mar. 11, 1981
Sten-Ake Gustafsson, Edsvalla, SE;
Aktiebolaget Karkstads Mekaniska Werkstad, Karlstad, SE;
Abstract
In order to effect removal of both limbs and bark from wood, such as trimmings or trees removed in thinning, with satisfactory results in a barking drum, the drum proper comprises a cylindrical pretreatment section of large diameter, a tapering transition section and a cylindrical final treatment section of smaller diameter. In the pretreatment section, which has a larger number of log lifters, an intensive treatment of the bundle takes place, so that the stems of the trees are exposed while branches and twigs are crushed. In the transition section, which has only half the number of log lifters, the tumbling motion of the wood subsides and a change-over takes place to parallel barking, which is concluded in the final treatment section, where the number of log lifters is again increased, suitably up to the original number. The pretreatment section is preferably preceded by an infeed section with infeed means arranged on the inside for quick feeding-in of the bundle of trees into the pretreatment section. The infeed means can consist of helically extending pusher vanes.