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Browse Prior Art Database

TONER SENSOR

IP.com Disclosure Number: IPCOM000024560D
Original Publication Date: 1980-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 76K

Publishing Venue

Xerox Disclosure Journal

Abstract

In an electrophotographic printing machine, a supply of toner particles is stored in a housing. It is highly desirable to have an indication readily visible to the operator for determining when the housing is depleted of toner particles. As shown in Figure I, toner housing includes a top 10 having a slot 12 therein. Cylinder 14 having a T-shaped portion 16 extending outwardly therefrom is mounted rotatably in brackets 18 secured to top 10. Roll 14 includes a red rectangular strip 20 extending substantially parallel to its longitudinal axis thereof across the circumferential surface.

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Page 1 of 2

TONER SENSOR
Proposed F. V. Onorati Classification

U.S. Cl. 427/145 Int. Cl. B41m 5/16

14 22

14s

22

Volume 5 Number 6 November/December 1980 675

[This page contains 1 picture or other non-text object]

Page 2 of 2

TONER SENSOR (Cont'd)

In an electrophotographic printing machine, a supply of toner particles is stored in a housing. It is highly desirable to have an indication readily visible to the operator for determining when the housing is depleted of toner particles. As shown in Figure I, toner housing includes a top 10 having a slot 12 therein. Cylinder 14 having a T-
shaped portion 16 extending outwardly therefrom is mounted rotatably in brackets 18 secured to top 10. Roll 14 includes a red rectangular strip 20 extending substantially parallel to its longitudinal axis thereof across the circumferential surface.

Referring now to Figure 2, when the housing is filled with toner particles, flat T 16 secured to roller 14 pivots roller 14 in a clockwise direction so that red portion 20 is rotated away from slot 12 in top 10. In this way, only the white region of cylinder 14 is displayed through slit 12. Under these circumstances the operator has indication that the housing contains a sufficient supply of toner particles therein.

Referring now to Figure 3, when the toner particles are depleted from the housing, roller 14 pivots in a counterclockwise direction so that stop 22 engages top 10. Under these circumstances red strip 20 is in line with slot 12. This provides...