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US 4,067,370 AGranted
Automatic plank planing machine
OwnerChen-Wan Changinventor
Life of this patent
Estimating the term…
Abstract
An automatic plank planing machine, and more particularly a planing machine wherein two feeding rollers are vertically movable to compensate for warp in planks to be planed in order to provide an accurate and smooth planing operation.
Claims6
An automatic lumber planing machine comprising:
- a machine body;
- a planing table mounted on said machine body and having follower roller troughs defined therein;
- two movable roller housings, each movably mounted on said planing table to be disposed thereabove;
- conveyor rollers mounted on each of said roller housings;
- a follower roller mounted in each of said planing table follower roller troughs;
- adjustable set screws connecting said housings to said machine body;
- spring means mounted on said machine body and connected to each said housings;
- a stationary member secured to said machine body between said two roller housings;
- a horizontal rod mounted on each of said movable housings;
- two bars each having opposite ends and each being pivotally connected to said stationary member, each bar having a balance weight on one end thereof with the other end of said each bar being forced upwardly against said horizontal rod by said weight so that each roller housing can be moved upwardly to allow said conveyor roller to follow a natural warp of a plank being put through the planing machine, whereby the frictional driving engagement of said rollers with the plank will not exert sufficient pressure on that plant to deform the same.
7 more elements
Dependencies are inferred from the claim text.