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High Speed Card Punch

IP.com Disclosure Number: IPCOM000081098D
Original Publication Date: 1974-Apr-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Gooch, WW: AUTHOR

Abstract

Card punches for one-column-at-a-time operation have their punches and associated dies arranged in a single column. Staggering adjacent punches and associated dies by positioning them alternately in two consecutive columns allows an increase in the punching rate, because two card columns may be punched simultaneously. The average increase in the punching rate depends on the probability of the occurrence of identical punches in consecutive columns. Such occurrence requires a momentary reversion to slower single-column punching, which is initiated by utilizing look ahead electronic circuitry.

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High Speed Card Punch

Card punches for one-column-at-a-time operation have their punches and associated dies arranged in a single column. Staggering adjacent punches and associated dies by positioning them alternately in two consecutive columns allows an increase in the punching rate, because two card columns may be punched simultaneously. The average increase in the punching rate depends on the probability of the occurrence of identical punches in consecutive columns. Such occurrence requires a momentary reversion to slower single-column punching, which is initiated by utilizing look ahead electronic circuitry.

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