Severing by tearing or breaking – Methods – With preliminary weakening
Patent
1990-12-19
1992-07-28
Yost, Frank T.
Severing by tearing or breaking
Methods
With preliminary weakening
225 965, 225101, B26D 302, B23D 2100
Patent
active
051334925
ABSTRACT:
A method for separating a thin-walled multiport extrusion into a plurality of micro-tubes for use as single pass lengths in a heat exchanger assembly, the method including the steps of threading the micro-extrusion into a clamping device including first and second sets of clamping blocks which hold the micro-extrusion rigidly while the clamping blocks of the clamping device are drawn in opposite directions on opposite sides of a groove cut in the upper and lower walls of the extrusion, tearing the extrusion apart along cutting lines formed in the upper and lower walls of the extrusion during the separation process.
REFERENCES:
patent: 1366063 (1921-01-01), Culhane, Jr.
patent: 3112559 (1963-12-01), Pauls
patent: 3254400 (1966-06-01), Gordon
patent: 3679109 (1972-07-01), King, Jr.
patent: 4216004 (1980-08-01), Brehm et al.
patent: 4562628 (1986-01-01), Marneffe et al.
patent: 4565244 (1986-01-01), O'Connor et al.
Paulman Roger
Wohrstein Franz X.
Peerless of America Incorporated
Rada Rinaldi
Yost Frank T.
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