Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1974-07-31
1976-12-28
Hoag, Willard E.
Metal working
Method of mechanical manufacture
Assembling or joining
264263, 264267, 264269, 264334, B23P 1500, B29G 700
Patent
active
039992799
ABSTRACT:
A method of making a punching mechanism for multiple selective perforation of a computer compatible card for use with a punch selector bank having slidable rods which are engaged in a locked position by operator manipulation of corresponding keys is disclosed. The ends of the selector rods are adjacent the butt end of punches slidable in a fixed plate. A punch plate slidably receives the opposite cutting end of the punches. A perforate template is secured to the punch plate and spaced apart to provide a card slot between the punch and template. The punch includes a latching switch mechanism to insure the card is properly inserted which will not permit reciprocation of the punch unless the card is properly inserted. An eccentric drive is adapted to reciprocate the guide and template toward the punches and the punches blocked by the locked rods will perforate the inserted card. A special punch is adapted to sever a portion of the card after it is in the card slot to orient the card for subsequent processing. The guide plate and template are fabricated by a molding process to achieve high accuracy in the location of the punch slots. The punching area of the guide plate and template contained within a frame member is filled with a plastic resin on a die. The die has projections corresponding to the location and size of the punches and when the frame is removed after solidification of the plastic, the frame contains multiple perforations precisely corresponding to the punches.
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Skeist et al., Epoxy Resins, Reinhold, N.Y., (1964), pp. 130-136 & 180.
Dombrow, Polyurethanes, Reinhold, N.Y., (1965), pp. 161-163 & 175-179 relied on.
Mayo Alfred M.
O'Neal Cothburn M.
Hoag Willard E.
Riverside Press, Inc.
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