Browse Prior Art Database

Magnetic Ink Container for Supplying Constant Density Magnetic Ink

IP.com Disclosure Number: IPCOM000083681D
Original Publication Date: 1975-Jul-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Pimbley, WT: AUTHOR

Abstract

Container 10 supplies magnetic ink to a reservoir through exit ports 11 in the hollow inner tube 12 which is slidable telescopically in outer tube 13, which extends through container cap 14. A float 15 is attached by cord 16 to the end of inner tube 12, so that as the ink supply 17 in container 10 varies the inner tube 12 is elevated or lowered within outer tube 13, thereby maintaining the exit ports 11 a fixed distance below the surface 18.

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

Magnetic Ink Container for Supplying Constant Density Magnetic Ink

Container 10 supplies magnetic ink to a reservoir through exit ports 11 in the hollow inner tube 12 which is slidable telescopically in outer tube 13, which extends through container cap 14. A float 15 is attached by cord 16 to the end of inner tube 12, so that as the ink supply 17 in container 10 varies the inner tube 12 is elevated or lowered within outer tube 13, thereby maintaining the exit ports 11 a fixed distance below the surface 18.

The magnetic ink in supply 17 is a colloidal suspension which exhibits the phenomenon of sedimentation. Typically, when equilibrium exists, the magnetic moment of the ink at the bottom of the container 10 exceeds the top by an appreciable amount. According to sedimentation theory, there is a point in a vessel of constant height where the magnetic moment is constant. The length of attachment cord 16 is selected so that the ports 11 are slightly above the desired point where magnetic moment equals the average value. As container 10 empties, ports 11 fall below the desired point. A stop element 19 is located in the container 10 to halt the descent of inner tube 12, when ports 11 come within the predetermined point near the bottom of the container.

1

Page 2 of 2

2

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