Browse Prior Art Database

Toner-Charged Distribution Tester

IP.com Disclosure Number: IPCOM000043493D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Barteck, JC: AUTHOR [+3]

Abstract

A test apparatus is disclosed in Figs. 1 through 4 for determining the charge characteristics of toner, such as toner utilized in printers and copiers. An embodiment of an electrostatic precipitator (Figs. 1-3) comprises a housing having an air flow inlet at 12 and an outlet at 14 communicating with a filter 16. The top and bottom portions of the housing are defined by positively and negatively charged plates 18 and 20, respectively. A ground plate 22 is removably positioned across the center of the housing. Fig. 4 is a schematic of the test apparatus. A sample of toner is drawn through the precipitator where particles of charged toner will be attracted to the top and bottom electrodes, being charged to opposite polarities. Particles of uncharged toner pass through the precipitator and are entrapped by the filter.

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Toner-Charged Distribution Tester

A test apparatus is disclosed in Figs. 1 through 4 for determining the charge characteristics of toner, such as toner utilized in printers and copiers. An embodiment of an electrostatic precipitator (Figs. 1-3) comprises a housing having an air flow inlet at 12 and an outlet at 14 communicating with a filter 16. The top and bottom portions of the housing are defined by positively and negatively charged plates 18 and 20, respectively. A ground plate 22 is removably positioned across the center of the housing. Fig. 4 is a schematic of the test apparatus. A sample of toner is drawn through the precipitator where particles of charged toner will be attracted to the top and bottom electrodes, being charged to opposite polarities. Particles of uncharged toner pass through the precipitator and are entrapped by the filter. An integrator positioned between each of the charged electrodes and its respective power supply is used to make the total exchange of electrons. Individual weighings of the two electrodes and filter are carried out to determine the charge distribution of the toner sample. The ground plate is inserted into the tester after a sample is taken to maintain a force field on one plate while the other is removed for weighing.

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