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

BACKGROUND REMOVAL SCHEME FOR A MAGNETOGRAPHIC MACHINE

IP.com Disclosure Number: IPCOM000025239D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 91K

Publishing Venue

Xerox Disclosure Journal

Abstract

Because latent magnetic images formed in magnetographic machines tend to be highly over developed, a large percentage of the toner on the developed image (around 40%) must be removed in order to achieve an acceptable background level in the non-image areas. Consequently, unless this toner is continually returned to the development sump holding toner, the toner or developer consumption rate becomes prohibitively high. Generally, toner recovery devices are either expensive or high energy users or both.

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

BACKGROUND REMOVAL SCHEME FOR A MAGNETOGRAPHIC MACHINE Delmar G. Parker
Stanley B. Swackhamer

Proposed Classification
U.S. C1. 118/637 Int. CI. B05b 5/02

Because latent magnetic images formed in magnetographic machines tend to be highly over developed, a large percentage of the toner on the developed image (around 40%) must be removed in order to achieve an acceptable background level in the non-image areas. Consequently, unless this toner is continually returned to the development sump holding toner, the toner or developer consumption rate becomes prohibitively high. Generally, toner recovery devices are either expensive or high energy users or both.

In a low cost magnetographic device, a toner recovery device 10 is combined with the development housing 12 shown in the accompanying figure. An air knife nozzle

Volume 9 Number 2 March/April 1984 95

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

Page 2 of 2

BACKGROUND REMOVAL SCHEME FOR A MAGNETOGRAPHIC MACHINE ?Cont'd)

14 directs a jet of air directly into and through the port 16 where the developed image on the magnetic medium 18 leaves the development housinF. By directing the jet from the air knife nozzle so that it blows toner removed thereby from the image-bearing magnetic medium back into the housing, the airborne or air- entrained toner is confined to the development housing.

A typical magnetographic developing system comprises a magnetic development roll 20 to which toner...