Self-seating toning shoe for electrostatic drum printers

Details Self-seating toning shoe for electrostatic drum printers Self-seating toning shoe for electrostatic drum printers

1986-05-09

1987-09-15

Pianalto, Bernard D.

Coating apparatus

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

Electrostatic and/or electromagnetic attraction or...

118651, 118660, 118662, B05B 502

Patent

active

046932062

ABSTRACT:
A toner applicator assembly for electrostatic drum printers featuring a toning shoe with a biasing mechanism in which the toning shoe is biased only at a single point. The toning shoe scans a sheet having an electrostatic latent image supported on a rotating drum, in a helical path, and applies liquid developer to the sheet to develop the latent image. The toning shoe has a normal orientation which is skewed with respect to the drum's rotation axis so as to follow a helical path. The toning shoe is movable with respect to three degrees of freedom relative to the normal orientation so as to automatically adjust its orientation to match the orientation of the sheet. The biasing mechanism comprises a base fixed relative to the drum, a lever body pivotally mounted to the base, a pin mounted on an end of the lever body and engaging a detent in the back of the shoe, and a spring connected to both the base and the end of the lever body opposite from the pin. The spring provides torque to cause the pin to push against the shoe. The toning shoe is loosely secured to the base by partially inserted screws which limit the shoe's forward movement.

REFERENCES:
patent: 3752119 (1973-08-01), Matkan

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