Shake fabricating process

Woodworking – Process – Mechanical cutting or shaping

Patent

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Details

144 3R, 144 13, 144 43, 144367, 144368, 144376, 144378, 144364, 427297, 427351, B27M 100, B27M 108

Patent

active

049711253

ABSTRACT:
A shake fabricating process for producing roofing shakes from wood is provided. In accordance with the process a log is stripped of its bark and cut into bolts having a preselected length corresponding to the desired length of the shakes to be produced. The bolts are then cut in half, or in quarters, longitudinally to produce bolt sections which are, in turn, cut into boards having a preselected thickness. A plurality of longitudinally oriented grooves are then cut into the upper and lower surfaces of the boards to give the surfaces the appearance of being hand split, and the boards are cut diagonally from end to end to produce a pair of shakes which decrease in thickness from their first end portions to their second end portions. In order to achieve the desired wood colorization the shakes are then placed in a pressure treating chamber and a first vacuum is generated in the chamber for a preselected time period in order to draw a liquid pigment into the chambers. After the liquid pigment is introduced into the chamber, the chamber is pressurized to atmospheric or slightly higher pressure for a selected period to allow the shakes to become coated with said liquid pigment. The liquid pigment is then drained from the chamber and a second vacuum is generated in the chamber in order to remove any excess pigment from the surface of the shakes.

REFERENCES:
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patent: 4194033 (1980-03-01), Motai
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patent: 4343840 (1982-08-01), Edwards et al.
patent: 4371572 (1983-02-01), Hager
patent: 4413024 (1983-11-01), Miyata et al.
patent: 4486475 (1984-12-01), Shutov et al.
patent: 4637952 (1987-01-01), Roselund

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