Punching device
OwnerAngelo Dottainventor
Life of this patent
Estimating the term…
Abstract
A punching device comprising a pair of opposed complementary dies vertically guided by a pair of guide rods each rotatably connected to a crank pin to continuously punch band material moving between the dies. The crank pins rotate synchronously in opposed directions with their crank centers spaced only vertically relative to the working plane. Each of the dies supports a plurality of cooperating tools and the tools in one of the dies are independently axially movable male punches sealingly guided in ducts communicating with a closed chamber filled with a fluid.
Claims3
A punching device for band material comprising at least one die containing a plurality of tools supported by stems slidably mounted in ducts provided in a base portion of said die and communicating with a closed chamber filled with fluid acting on lower end portions of said stems.
Dependencies are inferred from the claim text.