Periodically excited level control probe
AssigneeE. I. Du Pont de Nemours and Company
InventorsNicholas Biddle, III, Roger A. Patterson
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Abstract
A copy machine having a decorator for applying toner to a latent image is disclosed. The decorator is fitted with a control for sensing the level of toner in the decorator sump which control automatically maintains the amount of toner in the sump at the desired level. The control includes a toner level sensor which is a vibrating rod driven by a decorator roll.
Claims9
An apparatus for controlling the level of toner particles in the sump of a decorator adapted to apply toner particles to a latent image said decorator containing at least one rotatable member, adapted to periodically strike a probe rod located within said sump and capable of vibrating whereby said probe is caused to vibrate, sensor means to sense whether or not the vibration of the probe is being damped by toner particles in the sump, drive means actuated by said sensor means adapted to add toner to said sump when the vibration of the probe is not being damped by toner.
Dependencies are inferred from the claim text.