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Reproduction Process

IP.com Disclosure Number: IPCOM000098838D
Original Publication Date: 1958-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Pexton, HW: AUTHOR [+2]

Abstract

Reproduction of images printed in magnetic ink offers excellent possibilities for duplication of an infinite number of copies at a very low cost.

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Reproduction Process

Reproduction of images printed in magnetic ink offers excellent possibilities for duplication of an infinite number of copies at a very low cost.

In this process, a master paper copy printed in magnetic ink and an endless nickel cobalt plated belt are passed between the rolls of an electromagnetic reproducing head. An inking device drops magnetic particles onto the belt which carries the image to a point where it is transferred to a paper and then passed through a fixative. The reproducing head comprises twin electromagnets 10 and 11 having rolling pole pieces one of which 12 is stationary and the other 14 is carried on a pivoted arm 15 and spring biased into rolling contact with pole 12. The magnetic attraction of the rolling pole pieces assists in holding a tight gap and dampening roller bounce due to the ink characters entering and leaving the gap at high speed.

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