Measuring Toner Flowability
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
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.