Electrostatic development system with passive storage capacity

Details Electrostatic development system with passive storage capacity Electrostatic development system with passive storage capacity

1974-09-25

1976-12-28

Stein, Mervin

Coating apparatus

With means to apply electrical and/or radiant energy to work...

Electrostatic and/or electromagnetic attraction or...

118655, G03G 1508

Patent

active

039995127

ABSTRACT:
The developer storage capacity of a development system for an electrostatic processor is increased by adding a passive reservoir to supplement the system pump. Provision is made for maintaining a more or less continuous flow of developer into and out of the reservoir, including means for feeding developer from the reservoir to the sump whenever the supply of developer within the sump drops below a predetermined level. In a cascade development system, a hopper having a constricted discharge orifice leading to the development zone of the processor is filled to overflowing with developer so that there is a substantialy constant head causing the orifice to meter developer into the development zone at a substantially uniform rate. The reservoir is, in turn, positioned to intercept the overflowing developer and to feed developer into the sump whenever the supply of developer therein drops below the bottom of the reservoir.

REFERENCES:
patent: 3011474 (1961-12-01), Ulrich
patent: 3550555 (1970-12-01), Hudson
patent: 3648658 (1972-03-01), Weiler
patent: 3662711 (1972-05-01), Hudson
patent: 3756192 (1973-09-01), Locklar et al.

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