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Hole Marking Punch

IP.com Disclosure Number: IPCOM000098531D
Original Publication Date: 1959-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Prater, MP: AUTHOR

Abstract

The punch visibly marks the positions of holes or perforations that have been purposely made in a record card in order to distinguish such holes from other apertures that may be formed accidentally in the card. Cards having prescored index areas (right-hand view) are subject to damage, which may cause one or more unwanted holes to appear in a column having a desired perforation. The punch marks those holes that are to be regarded as authentic when a damaged card is reproduced.

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Hole Marking Punch

The punch visibly marks the positions of holes or perforations that have been purposely made in a record card in order to distinguish such holes from other apertures that may be formed accidentally in the card. Cards having prescored index areas (right-hand view) are subject to damage, which may cause one or more unwanted holes to appear in a column having a desired perforation. The punch marks those holes that are to be regarded as authentic when a damaged card is reproduced.

As shown in the left hand view, the punch tip 1 is associated with a marking cartridge 2 of porous, ink retaining material. These parts normally are enclosed by a telescoping sleeve 3, which is adapted to be received in a guide hole afforded in the template 4 that overlies the card. When the punch tip 1 is pushed through a selected index area of the card to eject a chip (center view), the sleeve 3 yields, and cartridge 2 makes an inked impression around each punched hole (right hand view).

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