Browse Prior Art Database

Fixing Magnetic Particle Images By Impact

IP.com Disclosure Number: IPCOM000097672D
Original Publication Date: 1961-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Gamblin, RL: AUTHOR

Abstract

Magnetic images are produced by a record head 10 on the surface of a continuously rotating magnetic drum 11. Magnetic particles 12 in hopper 13 flow in a stream onto impression roller 14. Excess particles from the stream are collected in container 15 and are returned to hopper 13. Developed images are transferred from the surface of 11 onto paper 16 by pressure applied through roller 17. Paper 16 is fed from supply reel 18 over guide rolls 19 and 20 to take-up reel 21.

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 100% of the total text.

Page 1 of 2

Fixing Magnetic Particle Images By Impact

Magnetic images are produced by a record head 10 on the surface of a continuously rotating magnetic drum 11. Magnetic particles 12 in hopper 13 flow in a stream onto impression roller 14. Excess particles from the stream are collected in container 15 and are returned to hopper 13. Developed images are transferred from the surface of 11 onto paper 16 by pressure applied through roller 17. Paper 16 is fed from supply reel 18 over guide rolls 19 and 20 to take- up reel 21.

Images transferred to 16 are fixed by impacting the image on the surface of
16. Impact energy is delivered by a hammer element 22 reciprocable under the action of a rotatable cam 23. A spring 24 inside the housing 25 biases 22 into contact with cam 23. The operation of 22 is such that it is caused to strike the unfixed magnetic characters on 16 so that a high per unit pressure is applied during impact. This pressure serves to drive the loosely adhering magnetic particles into the paper. The cam 23 operates in synchronism with the moving paper such that every potential character position on 16 is impacted.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]