Browse Prior Art Database

Toner Reservoir Level Detector System

IP.com Disclosure Number: IPCOM000074238D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Freeman, WD: AUTHOR [+2]

Abstract

This mechanism relates to an automatic resetting and locking pivoted paddle toner reservoir level detector system.

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Toner Reservoir Level Detector System

This mechanism relates to an automatic resetting and locking pivoted paddle toner reservoir level detector system.

A paddle 1 is fastened to a shaft 2 and positioned approximately vertically inside the toner reservoir 3. An arm 4, which is connected to the shaft 2 but is located outside the reservoir, trips a switch arm 5 when the shaft rotates about its pivots. Toner in the reservoir holds the paddle in the cocked position until the toner level falls below the paddle at which time the shaft is rotated and signals the logic of the "toner low" condition.

In FIG. 1, the paddle is shown in a cocked and latched position and is so held in that position by the spring 6. When a solenoid, not shown is activated after a predetermined interval and according to the electrical logic of the machine, the locking pawl 7 is released and, if the toner level is low, the stretched spring 8 becomes the prevailing force and pivots the paddle-shaft to the tripped position, see FIG. 2. The arm 4 upon contacting the switch arm 5 causes the solenoid to be cut off and once again the spring 6 prevails and returns the paddle to cocked- latched position as shown in FIG. 1.

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