Metal deforming – By use of closed-die and coacting work-forcer – With stripping or ejecting from tool
Patent
1994-05-02
1996-02-20
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
With stripping or ejecting from tool
251304, B21D 4508
Patent
active
054920000
ABSTRACT:
A press for forming the relatively long cylindrical body of a so-called two piece beverage can utilizes a horizontally reciprocating ram to drive a relatively short cup through a circular die pack. Compressed air applied through a rotary valve is utilized to strip the bodies from the ram. Such valve includes a continuously rotating rotor that is mechanically connected to the drive for the ram such that for each rotor revolution the ram moves through a complete cycle consisting of a forward working stroke followed by a rearward return stroke. The rotor is constructed of two disks that abut face to face. A rotor drive shaft extends through the center of the rotor and the angular position of the disks relative to each other is adjustable to adjust the portion of each rotor revolution during which compressed air is applied for stripping. Each disk is provided with an arcuate aperture and the extent to which these apertures overlap determines how long compressed air is applied for stripping. The angular position of the rotor on the drive shaft determines when compressed air is applied for stripping.
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Berliner Jerome M.
Bittman Mitchell D.
Larson Lowell A.
Sequa Corporation
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