Patent ID: 6114016
Filing Date: 2000-09-05
Classification: B21D,B26F,Y10T

Abstract:
A base plate for a computer data cartridge formed by punching a template, whereina punched end surface of the base plate formed by punching the base plate from the template which comprises a first sheer plane connected with a first surface of a base plate, a second shear plane connected with a second surface of said base, and a first fracture plane interposed between said first and second shear plane wherein said shear planes and said fracture plane are formed by first partially punching the template on a first side thereof and then fully punching the template on a second side thereof opposite to said first side; andwherein a punched flash is not formed at the connection between said first and second surfaces of said base plate and said respective first and second shear planes as an occurrence of a punched flash is naturally removed as a result of the fracture plane being subsequently rubbed by an inner peripheral surface of a punched opening of the template.