Electrographic ribbon blender and method

Details Electrographic ribbon blender and method Electrographic ribbon blender and method

2006-11-21

2006-11-21

Cooley, Charles E. (Department: 1723)

Agitating

Stirrer within stationary mixing chamber

Rotatable stirrer

C366S312000, C366S319000, C366S321000, C366S322000, C399S256000

Reexamination Certificate

active

07137730

ABSTRACT:
According to the various aspects of the invention, a method and apparatus for mixing electrographic developer is provided. An elongate shaft having two ends and an intermediate location between the two ends is rotated. Developer is moved away from the intermediate location toward one of the ends with an inner helical ribbon mounted concentrically to the elongate shaft for rotation therewith. Developer is moved away from the one of the ends toward the intermediate location with an outer helical ribbon mounted concentrically to the elongate shaft for rotation therewith, the inner helical ribbon is disposed within the outer helical ribbon. Developer is moved away from the intermediate location toward another of the ends with another inner helical ribbon mounted to the elongate shaft for rotation therewith. Finally, developer is moved away from the another of the ends toward the intermediate location with another outer helical ribbon mounted to the elongate shaft for rotation therewith, the another inner helical ribbon is disposed within the another outer helical ribbon. The outer helical ribbon and the another outer helical ribbon are terminated to provide an opening spanning the intermediate location through which developer is drawn into the inner helical ribbon and the another inner helical ribbon upon rotation of the longitudinal shaft.

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