Edger for a conventional sawmill

Woodworking – Combined machine – Planing and sawing

Patent

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Details

83365, 83368, 144 3R, 144357, 144369, 356376, 356386, B27C 900, B27B 100

Patent

active

052013510

ABSTRACT:
An edger for use with a conventional sawmill, including upper and lower chippers or cutters for forming the upper and lower edges of a board to be removed from a log, mechanical or optical sizers for automatically determining the location of the upper and lower edges of the board, and a control mechanism, responsive to the sizers, for positioning the cutters. The cutters have horizontal or vertical motors with associated blades, and the motors are mounted on carriages which ride up and down on a mast, positioned by a hydraulic cylinder. Mechanical sizing wheels are mounted on separate carriages, and the wheels are urged to contact the log's surface to determine extreme points of narrowness thereof. The extreme motion points of the sizing wheels are recorded by frictionally secured pistons which are sensed by metallic sensors which are input to the control mechanism. An electric eye causes the sizing wheels to move toward and away from the log. During each forward pass of the log toward the saw, the cutters cut the top and bottom edges off the board that the saw will remove from the log, while the sizers profile the log or locate the minimum width points to be used during the succeeding pass of the log to position the cutters. The single channel or double "H-beam" mast has machined sidewalls to which flanges are attached upon which the carriages slide vertically. Linear slide bearings can also attach the carriages to the mast.

REFERENCES:
patent: 3204675 (1965-09-01), Griffin
patent: 3692074 (1972-09-01), Nilsson
patent: 3880215 (1975-04-01), Mallery
patent: 3977447 (1976-08-01), Pease
patent: 4015648 (1977-04-01), Shepard
patent: 4335767 (1982-06-01), Reuter
patent: 4541722 (1985-09-01), Jenks
patent: 4848427 (1989-07-01), Rueter
patent: 4895197 (1990-01-01), Anderson
patent: 4907632 (1990-03-01), Reuter
patent: 4947909 (1990-08-01), Stroud
11 page brochure entitled Recovering Up to 15% More from Each Log--Selcon Selective Electronic Group--Optical Triangulation Probe sold in U.S. under trademark "Selcom Optocator".
1 page advertisement--"Temposonics II" Linear Displacement Transducers MTS Systems Corp. Sensors Division May 1991.
2 page Application Note for Temposonic Probe--MTS Sensors Division, Cary, NC dated Feb. 22, 1990.
1 page advertisement--Thomson Industries, Inc., Port Washington, N.Y.--Quickslide System in Machine Design/Apr. 9, 1992.

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