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High Speed Printing Method

IP.com Disclosure Number: IPCOM000097673D
Original Publication Date: 1961-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Greyson, J: AUTHOR

Abstract

In this high speed printing method an image is imposed on a storage drum 1 by a magnetic or electrostatic record head 2. Then the image is developed by means of a powder from storage hopper 3. The grain size of the powder is chosen so that a substantially raised image is formed on the surface of the drum (lower drawing).

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High Speed Printing Method

In this high speed printing method an image is imposed on a storage drum 1 by a magnetic or electrostatic record head 2. Then the image is developed by means of a powder from storage hopper 3. The grain size of the powder is chosen so that a substantially raised image is formed on the surface of the drum (lower drawing).

Drum 1 is then rotated to a printing position where a pressure sensitive paper 4 is forced into contact with the raised image by a pressure roller 5. The image on 1 is thus transferred to 4. This is due to the localized pressure caused by the raised image on 1. Drum 1 is then rotated past an erase head 6 which demagnetizes the surface of 1 and allows the powder to fall into a hopper.

Any type of pressure sensitive or carbonless carbon paper are suitable for the process as, for example, those types having small particles of encapsulated inks or dyes.

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