Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

AUTOMATIC DEVELOPMENT CONTROL SENSOR AND PROCESS

IP.com Disclosure Number: IPCOM000023958D
Original Publication Date: 1979-Jun-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 358K

Publishing Venue

Xerox Disclosure Journal

Abstract

The toner concentration of a developer is automatically monitored by photocell reading of toner deposited on NESA plates. In Figure 1, the developer 10 flows downwardly through the device and the flow may be interrupted by the flow regulating magnet 11. Flow regulating magnet 11 comprises an electromagnet which creates a magnetic field to cause the developer to align itself in a manner to

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 64% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

AUTOMATIC DEVELOPMENT CONTROL SENSOR AND PROCESS

Peter M~Tolliver

Proposed Classification U~S~CI. 118/646

mt. CL G03g 15/06

FIG. 1

F EID

T

FIG. 3

Volume 4 Number 3 May/3une 1979 301

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

Page 2 of 2

AUTOMATIC DEVELOPMENT CONTROL SENSOR AND PROCESS (Cont~d)

The toner concentration of a developer is automatically monitored by photocell reading of toner deposited on NESA plates. In Figure 1, the developer 10 flows downwardly through the device and the flow may be interrupted by the flow regulating magnet 11. Flow regulating magnet 11 comprises an electromagnet which creates a magnetic field to cause the developer to align itself in a manner to restrict its flow. A pair of NESA plates 12 are positioned in an ellipsoidal shell reflector between a lamp 13 and a photocell 14, which are located at the two foci of the ellipsoidal shell reflector. The NESA plates are provided with a source of a DC bias voltage 15 so that when the developer is cascaded onto the plates, toner will develop out onto one plate in a quantity proportional to the toner concentration of the developer. The other NESA plate is continuously grounded.

In Figure 2, the flow regulating magnet has interrupted the flow of the developer through the device. The DC bias voltage from source 15 has caused some toner 16 to be deposited onto a NESA plate. Accordingly, a photocell voltage level for the deposited toner layer is obtained.

In...