Patent ID: 6737765
Filing Date: 2004-05-18
Classification: B21D,B30B,F16P,Y10T

Abstract:
A press comprising:an upper tool and a lower tool, wherein said upper tool fits in an upper tool holder; a first low voltage safety circuit wherein said upper tool and said upper tool holder comprise a first electrical switch, said first electrical switch opens when said upper tool strikes an object; a second low voltage safety circuit wherein said upper tool and said lower tool comprise a second electrical switch, said second electrical switch closes when conductivity exists between said upper tool and said lower tool; a first high voltage control circuit wherein said first high voltage control circuit is isolated from said first low voltage safety circuit and said second low voltage safety circuit, and wherein either said first low voltage safety circuit or second low voltage safety circuit may switch said first high voltage control circuit; and a second high voltage control circuit wherein said second high voltage control circuit is isolated from said first high voltage control circuit, and wherein said first high voltage control circuit may switch said second high voltage control circuit.