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US 2006/0266178 A1Published application
Punch Stripper
AssigneeLane Punch Corporation
InventorRobert Martin
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AssigneeLane Punch Corporation
InventorRobert Martin
Estimating the term…
The punch stripper invention provides a design compatible with round or shaped punch points and flat, angular or irregular shaped surfaces to be punched. Using a bronze stripper insert machinable to suit the punch point shape and also three-dimensionally machinable to match the surface to be punched. The bronze stripper insert has graphite plugs to lubricate both the punch shank and the inner diameter of the insert sleeve as both components are used in close tolerance to guide the bronze stripper insert. An alignment pin is used in the insert sleeve to guide by a slot in the bronze stripper insert for anti-rotation. An elastomeric urethane spring is used for the stripping force required behind the bronze stripper insert, but always compressed in a parallel manor to maximize the life of the urethane. A retention plate is used to mount the stripper arrangement to a standard ball lock punch retainer with one or two screw style retention plates depending on clearance requirements.
A stripper arrangement for a standard ball lock style punch retainer comprising of a bronze stripper insert component movable inside the bore of the insert sleeve, an insert sleeve, an elastomeric urethane spring, a backing washer to protect the urethane spring from unintended surface contact, a retention plate for attachment to the punch retainer, an alignment pin and a socket head cap screw for attachment.
Dependencies are inferred from the claim text.