US 4,732,184 A · Lumber saw-sizing machine

Abstract

There is disclosed a machine for saw-sizing of lumber and a method for its use. The machine has a frame and a work table surface which supports at least one and, preferably four, bandsaws. The bandsaws are each positioned at an incident angle from 20.degree. to about 80.degree. to the surface of the lumber which is fed through the machine. The lumber is fed from the back side or back edge of the bandsaw saw blades. The machine is specifically designed for a single pass sizing of all four sides of lumber with two vertical bandsaws and two horizontal bandsaws; the horizontal bandsaws are positioned to size the bottom and top surfaces of the lumber while the vertical bandsaws are positioned to size the opposite vertical sides of the lumber. The method comprises passing the lumber through the machine from the back edge of the bandsaw blades to drag the lumber against the bandsaw blades. This results in a rough saw sized texture to the lumber without any significant change in its dimensions.

Claims14

Dependent claims

A method for rough surface dressing of opposite surfaces of lumber without significantly altering its dimensions which comprises:

a. placing said lumber on a bandsaw cutting fixture having a longitudinal fence and at least two bandsaws each having a cutting edge and a non-cutting back edge, each having its respective saw blade oriented to a respective surface of said lumber at an angle between 10.degree. and 75.degree. thereto and passing said lumber through said fixture from the back edges of said saw blades;
b. guiding said lumber through said cutting fixture by biasing it against said longitudinal fence and thereby moving one of said surfaces against the first of said bandsaws;
and
c. resiliently biasing the second of said bandsaws against the other of said opposite surfaces of said lumber, thereby rough surface dressing both opposite surfaces of said lumber.

1 more element

A machine for dressing the surfaces of lumber having at least opposite vertical sides, a bottom surface and a top surface, said machine comprising:

a. a support frame;
b. a work tble surface supported on said support frame and extending substantially coextensively therewith;
c. a fence extending along one side of said work table surface for contact by one of said vertical sides of said lumber;
d. first and second bandsaws, each comprising at least two saw pulleys mounted on a bandsaw frame with a continuous saw blade received thereon and positioned with said saw blade oriented in a cutting relationship to a respective surface of said lumber which is at an incident angle thereto between 10.degree. to about 75.degree., and power drive means operatively connected to said bandsaws;
e. first bandsaw mounting means fixedly mounting said first bandsaw vertically on said support frame with its saw blade in said cutting relationship to said one vertical side of lumber in contact with said fence;
f. second saw mounting means movably supporting said second bandsaw vertically on said frame, and retaining it thereon at said cutting relationship to the other of said opposite sides of said lumber;
and
g. resilient means biasing said second bandsaw against said opposite side of said lumber.

5 more elements

Dependencies are inferred from the claim text.

Lumber saw-sizing machine

Life of this patent

Lumber saw-sizing machine

Life of this patent

Abstract

Claims14