Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Measuring Toner Flowability

IP.com Disclosure Number: IPCOM000043551D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Crossan, SC: AUTHOR [+4]

Abstract

Flowability of xerographic toner is measured by a fixture which includes a plow-blade and a following strain gage blade. The fixture includes a dish-like sample container 10 which is open-top, closed-bottom and cylindrical in shape. This shape is not critical. Container 10 rests on horizontal motor-driven turntable 20, with the central axis 30 of the container and the turntable's axis of rotation coincident. A motor (not shown) rotates the turntable counterclockwise, as viewed from above. A movable crossbar 40 mounts a plow-blade 50 and a strain gage blade 60. Crossbar 40 is manually lowered, and then locked to vertical posts 70 and 80. In this lowered position, both of the blades 50 and 60 penetrate a fixed, known depth into the toner which is resident in container 10. Blade 50 will cut through the toner.

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

Measuring Toner Flowability

Flowability of xerographic toner is measured by a fixture which includes a plow- blade and a following strain gage blade. The fixture includes a dish-like sample container 10 which is open-top, closed-bottom and cylindrical in shape. This shape is not critical. Container 10 rests on horizontal motor-driven turntable 20, with the central axis 30 of the container and the turntable's axis of rotation coincident. A motor (not shown) rotates the turntable counterclockwise, as viewed from above. A movable crossbar 40 mounts a plow-blade 50 and a strain gage blade 60. Crossbar 40 is manually lowered, and then locked to vertical posts 70 and 80. In this lowered position, both of the blades 50 and 60 penetrate a fixed, known depth into the toner which is resident in container 10. Blade 50 will cut through the toner. More-flowable toner will fill in behind blade 50, whereas less-flowable toner will result in a U-shaped channel behind blade 50. Blade 60 follows blade 50, at the same radius from axis 30. A strain gage (not shown) is connected to blade 60. The output of this strain gage is connected (by way of a bridge amplifier and a long-time-constant, low-pass filter) to a voltmeter and an X-Y plotter. Fig. 2 shows an exemplary curve which can be obtained by testing a given toner with different percentages of a flow-controlling agent, where all samples are mixed in substantially the same way. This apparatus can also be used to compare different...