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Primary Examiner: Stein, Mervin
Assistant Examiner:
Attorney: Hill, Van Santen, Steadman, Chiara & Simpson

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Title: Cascade assembly and method

Abstract: Substantially uniform distribution of developer in a cascade assembly for xerographic reproduction apparatus is effected as the developer slides down an inclined cascade baffle onto which the developer is dumped by a succession of buckets which elevate the developer from a sump in the cascade chamber. From the cascade baffle the developer is cascaded substantially uniformly onto a perimeter sector of the electrostatic image carrying drum of the associated apparatus. Uniform developer distribution is attained on the cascade baffle by means of an array of distribution projections. Toner dust is effectively screened from the image-free areas of the image carrying drum. This is accomplished by efficiently blocking access of the dust to the drum by the position of an effective dust baffle between the developer supply and the drum in the area where the unused developer drops into the developer sump after the developing cascade.

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Inventors: Reick, Kenneth R. (Oak Brook, IL, US)
Blumthal, William M. (Naperville, IL, US)
Hurwitz, Harold S. (Downers Grove, IL, US)

Application Number: 865889
Filing Date: 1977-12-30
Publication_date: 1980-04-01
Assignee: Yorktown Industries, Inc. (Addison, IL)
Primary Class(es): 399/103 399/294, 430/121
Other Classes:
US Patent Ref:

3079483	Feb, 1963	Codichini et al.	118/653.
3336905	Aug, 1967	Lehmann	118/637.
3572289	Mar, 1971	Maksymiak	118/658.
3611992	Oct, 1971	Lyles	427/20.
3638611	Feb, 1972	Weiler et al.	118/648.
3670701	Jun, 1972	Weiler	118/654.
3795222	Mar, 1974	Jugle et al.	118/648.
3799113	Mar, 1974	Whited	118/650.
3863603	Feb, 1975	Buckley et al.	118/658.
3941470	Mar, 1976	Shah	355/3.
4095883	Jun, 1978	Parker et al.	118/657.

Other Refs: Other References: IBM Technical Disclosure Bulletin, vol. 15, No. 3, Aug. 1972, p. 756; Cross Mixer for Developer, K. C. Chaudhary and J. J. Moll.