Browse Prior Art Database

Toner Size Classification

IP.com Disclosure Number: IPCOM000051046D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Godlewski, RB: AUTHOR [+3]

Abstract

Fine particulate material such as xerographic toner, coming from an air milling device such as a jet-mill, is supplied to a cyclone separator for separation from an airstream. Suitable adjustments to the cyclone separator will cause a controlled amount of the finest sized particulates to be classified out of the captured material to give a desired particle size range.

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 77% of the total text.

Page 1 of 2

Toner Size Classification

Fine particulate material such as xerographic toner, coming from an air milling device such as a jet-mill, is supplied to a cyclone separator for separation from an airstream. Suitable adjustments to the cyclone separator will cause a controlled amount of the finest sized particulates to be classified out of the captured material to give a desired particle size range.

Figs, 1 and 2 are a side view and a top-portion section view, respectively, of such a separator 10. The toner mixture is supplied in a stream to separator inlet 11, as represented by arrow 12 (Fig. 2). This mixture passes through spiral duct 13 and then enters the separator's separation chamber 14.

The separator's exit duct 15 includes a vertically adjustable section 16 which is adjusted to reduce the efficiency of the separator, and thereby cause all particles which are smaller than the desired small size of the classification range, and undesirably some larger particles, to exit as waste through duct 15 and its gas flow, as the properly classified toner falls to the bottom 17 of the separator.

In order to increase the efficiency of the above process, i.e., reduce the number of usable toner particles discarded as waste, the separator is provided with a sealed adjustment plate 18. Plate 18 is adjusted to a dimension W (Fig.
2). The gas/particulate velocity as it exits the spiral duct 13 into the chamber 14 is inversely proportional to dimension W. The adjustment of plate 18...