Cutting – Processes – Plural cutting steps
Patent
1987-02-24
1989-01-10
Yost, Frank T.
Cutting
Processes
Plural cutting steps
83 54, 83319, 83875, 83916, B26D 306, B26D 316
Patent
active
047964987
ABSTRACT:
A method for dimple free guillotine cutting of multiple wall tube which involves first cutting a transverse notch substantially completely through the outermost tube wall and secondly cutting a notch through the path of the first notch but of greater depth to extend partially through the innermost tube wall. The cutoff function is then finalized by means of a guillotine blade which enters through the coextensive notches. Both pull-across and thrust blades for carrying out the method are disclosed.
REFERENCES:
patent: 3120153 (1964-02-01), Proctor et al.
patent: 4036091 (1977-07-01), Borzym
patent: 4108029 (1978-08-01), Borzym
patent: 4628599 (1986-12-01), Bermieri, Jr. et al.
Alpha Industries Inc.
Smith Scott A.
Yost Frank T.
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