Browse Prior Art Database

Rotary Embossed Credit Card Scanner

IP.com Disclosure Number: IPCOM000074018D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Manning, SA: AUTHOR [+2]

Abstract

This is a mechanism for optically scanning embossed characters on a credit card by a frustrated total internal reflection.

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 68% of the total text.

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Rotary Embossed Credit Card Scanner

This is a mechanism for optically scanning embossed characters on a credit card by a frustrated total internal reflection.

Referring to FIG. A, there is shown a mechanism for optically scanning an embossed credit card 10. The credit card is passed between a cylindrical transparent drum 12 and a pressure roller 14. Sandwiched between the credit card 10 and the transparent drum 12, is an endless elastomer belt 16. The elastomer belt provides sufficient contact area between the embossed characters 17 on the card and the transparent drum surface 12. The belt 16 is separated from the drum surface 12 by an idler pulley 18 which causes the belt to pass around the transparent drum 12. Separation of the belt from the drum enables the cleaning brush 20 to remove any dust particles from the drum surface that are capable of introducing erroneous information which is present in the form of optical background noise.

Referring to FIG. 2, there is shown a more detailed diagram of the scanner mechanism 22. Belt 16 consists of a thin web of elastomer material with heavy ribbed edges 30. The ribbed edges fit into grooves on the transparent drum 12 thus stretching the elastomer in the lateral direction to present a flat surface to the credit card 10 and reduces the tendency of the elastomer to wrinkle. Furthermore, the ribbed portions 30 provide a proper tracking of the belt 16.

The pressure roller 14 pushes the credit card against the drum surfac...