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US 3,939,741 AGranted
Method and apparatus for cutting reinforced foam
AssigneeMcDonnell Douglas Corporation
InventorWinford K. Allan
Life of this patent
Estimating the term…
Abstract
A saw blade having one tooth tilting to the left, one tooth tilting to the right, and a third tooth straight, repeated throughout the saw blade. Tilt causes the set teeth to be shorter than the straight teeth which first contact and cut the foam and fiber glass strands. The cut strands are free to move away from the following raker teeth which remove additional foam, leaving the desired tufts.
Claims2
A method of cutting reinforced foam insulation comprising the steps of:
- a. passing a cutting tool through the insulation first cutting across strands extending through said insulation;
- and
- b. thereafter cutting the foam along a plane spaced from the cut ends of said strands and removing said foam adjacent thereto to thus expose the cut ends of said strands, said method being repeated until the cutting of the strands and foam has been completed whereby the plane of the tips of said ends is spaced from the plane of the cut surface of said insulation.
Dependencies are inferred from the claim text.