Cutting – Rotatable disc tool pair or tool and carrier – Carrier for rotatable tool movable during cutting
Patent
1976-01-23
1977-05-24
Schran, Donald R.
Cutting
Rotatable disc tool pair or tool and carrier
Carrier for rotatable tool movable during cutting
83500, 83495, 834712, B26D 124
Patent
active
040247848
ABSTRACT:
In that type of sheet metal shear having upper and lower rotary cutters to which power is supplied, both to cut a sheet of metal overhanging a work table edge and to propel the shear along the line of cut, unexpected capacity is achieved. The upper and lower cutters are powered each with separate motor. The cutters are driven through bevel gear sets; the upper motor is positioned with clearance above the work table, with its shaft slanting downward to the bevel gear intersection. Using the separate upper motor eliminates the transmission of power along and across the upward slanting bridge portion of the frame aft of the cutters. With this function eliminated, the bridge portion may be lower, requiring less power to deflect the scrap being cut off. With this saving of power added to the saving from using the efficient bevel gear sets, heavier gauge sheets are slit with less power than heretofore required for thinner sheets.
REFERENCES:
patent: 1727796 (1929-09-01), Summer
patent: 2946251 (1960-07-01), Engel
patent: 3190094 (1965-06-01), Kutas
patent: 3791246 (1974-02-01), Lazickas
patent: 3949633 (1976-04-01), Cauffiel
Engel Industries, Inc.
Schran Donald R.
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