Resources Contact Us Home
Shear punch

Image Number 3 for United States Patent #4706533.

A punch is provided having a novel tooth configuration wherein the tooth has piercing points at the centers of the extreme ends of a rectangular shank with an arcuate surface connecting the two points and with four concave surfaces connecting the sides of the arcuate surface with flat sides of the rectangular shank. The punch has a double action wherein it first pierces the paper and then shears the side walls so that a minimum amount of energy is necessary.

  Recently Added Patents
Output circuit
Capacitance sensing
Markers of acute myeloid leukemia stem cells
DFPase enzymes from Aplysia californica
Process for the production of electric energy by the excitation and capture of electrons from ground or water sources
Maintenance guidance display device, maintenance guidance display method, and maintenance guidance display program
Methods and systems for adapting a user environment
  Randomly Featured Patents
Axle driving apparatus with variable volume reservoir chamber
Payphone base
Drum beater pedal bearing and apparatus
Fuel supply system for internal combustion engine and fuel transfer tube
Pixel read-out architecture
Method for making paintable silicone surfaces and elastomer
Weft forming apparatus
Engine cylinder valve control system
Patient support apparatus
Nucleotide sequences and method of using same to increase plant stress tolerance