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Portable Punch Mechanism for Document Cards

IP.com Disclosure Number: IPCOM000074142D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Larson, CA: AUTHOR [+2]

Abstract

The punch mechanism 10 utilizes a manually held stylus 12 for completing the punching of holes 14 which have been previously partially punched in a document card 16.

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Portable Punch Mechanism for Document Cards

The punch mechanism 10 utilizes a manually held stylus 12 for completing the punching of holes 14 which have been previously partially punched in a document card 16.

Document card 16 is normally machine punched with relatively small holes 17 located in thirty-two vertical columns 20 and eighteen longitudinal rows 22. Holes 17 may, for example, be 0.046 inch in diameter and on 0.087 inch centers. Partially punched holes 14 are provided on alternate ones of the columns 20 and on alternate ones of the rows 22 and may have a diameter of 0.125 inch on
0.174 inch centers. Punch mechanism 10 comprises bottom plate 24 having cavity 26 provided therein; and filler strips 28, which are T-shaped in cross- section and are of rubber-like material, are imbedded in plate 24 and extend lengthwise of plate 24 in the same direction as rows 22. A mask plate 30 having openings 31 therethrough is disposed in grooves 34 provided in plate 24 so as to be positioned in spaced relation with the upper surfaces of the fillers 28. Caps 36 and 38 are provided at the ends of the plate 24. Cap 36 is fixed to plate 24, and cap 38 has a frictional engagement with plate 24 so that it may be removed. In order to completely punch the holes 14, card 16 is inserted into mechanism 10 beneath mask plate 30 and on top of fillers 28, sliding card 16 over cap 36 until card 16 is held from further movement by cap 38. Stylus 12 is then moved through those openings...