Cutting – With product handling means – Means to move – guide – or permit free fall or flight of product
Patent
1994-09-27
1996-09-10
Peterson, Kenneth E.
Cutting
With product handling means
Means to move, guide, or permit free fall or flight of product
83138, B21D 4508, B26F 0102
Patent
active
055535240
ABSTRACT:
A stripper device for a punching tool comprises: a gas cylinder (5) filled with a gas (7) having a cylinder head (27) and a cylinder end (17) attached to a lower end of the cylinder head airtightly; and a piston (9) having a punch head (11) and a piston rod (15); an axial movement restricting member (13, 201) for restricting an axial movement of the piston in the gas cylinder filled with the gas; and a rotational movement restricting members (31; 205, 203) for restricting a rotational movement of the piston in the cylinder body. A stripping force of the stripper device can be obtained by a resilient force generated whenever the gas is compressed by the piston within the gas cylinder for each punching operation. The punch assembly enables plate material of various thicknesses to be punched out without generating stripping miss. Further, when the stripper device is assembled with a punch body (19) as a punch assembly, the assembly length of the punch assembly can be adjusted finely by a stroke adjusting mechanism composed of a locating pin (41), locating holes (43) and thread engagement of the piston with the punch body.
REFERENCES:
patent: 2716451 (1955-08-01), Taylor
patent: 3147657 (1964-09-01), Williamson
patent: 4092888 (1978-06-01), Wilson
patent: 4292869 (1981-10-01), Wallis
patent: 4332179 (1982-06-01), Wallis
patent: 4516448 (1985-05-01), Hill
patent: 5054347 (1991-10-01), Johnson
European Search Report dated Nov. 10, 1994.
Amada Metrecs Company Limited
Peterson Kenneth E.
Pryor Sean A.
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