Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Card Reading Technique and Apparatus

IP.com Disclosure Number: IPCOM000076368D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 3 page(s) / 50K

Publishing Venue

IBM

Related People

Colglazier, DF: AUTHOR [+2]

Abstract

This technique and apparatus allows a document card 100 to be properly read by a card reader 10 regardless of whether card 100 is fed across reader 10 either forward in direction A, backward in direction B, or in either direction A or B upside down. This allows the operator total freedom in positioning card 100 in the machine, be it by manual loading or batch methods.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 3

Card Reading Technique and Apparatus

This technique and apparatus allows a document card 100 to be properly read by a card reader 10 regardless of whether card 100 is fed across reader 10 either forward in direction A, backward in direction B, or in either direction A or B upside down. This allows the operator total freedom in positioning card 100 in the machine, be it by manual loading or batch methods.

A document card 100 of a type satisfactory for use with this technique may include punching tiers 102, 104 and 106, and corresponding print rows 108, 110 and 112 may also be included. Each punching tier 102, 104 and 106 includes 32 punch columns, columns 1-32 in the first tier, columns 33-64 in the second tier and columns 65-96 in the third tier. Each of the punch columns may include up to six punched holes located at positions 1, 2, 4, 8, and B as shown.

A special character is required for this technique in a designated punched column of the card. This character must be mutually exclusive from all other characters used in the punched columns for data, and its inverse must also be mutually exclusive. An example of such a special character, for a particular data set, might be BA84 (holes punched in these particular positions in a certain column), and the inverse of this is 8421 which is also excluded from the character data set. This special character is preferably located by punched holes in one of the columns in any one of the tiers substantially spaced from the center columns 16, 48 and 80 and may well be located in end columns, such as for example as is shown, in column 1 of tier 1.

Card 100 is moved by any suitable transport in direction A, direction B, or in either of these two directions upside down, over card reader 10 which includes 24 reading elements aligned with the punch positions 1, 2, 4, 8, A and B of tiers 1, 2 and 3. As the holes in card 100 are read by reader 10, the resulting data is transmitted through data link 12 and data storage register 20 to the "128 Bytes Reserved For Card Data" section 24A o...