Browse Prior Art Database

TONER AEROSOL SUPPRESSION

IP.com Disclosure Number: IPCOM000026648D
Original Publication Date: 1993-Feb-28
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 106K

Publishing Venue

Xerox Disclosure Journal

Abstract

A developer unit having a system of internal ports and vents in combination with closely spaced lead and trail edge housing baf'fles or trim bars provide compensation for the pumping action of developer rolls and a means to equalize the air pressure between interior chambers in the development housing affording effective toner aerosol suppression. A developer housing design that effectively controls and prevents toner aerosol emissions is disclosed.

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XEROX DISCLOSURE JOURNAL

TONER AEROSOL SUPPRESSION Proposed Classification Laurence S. Barker U.S. C1.355/251
Karl Ayash
GarySharpe
Michael A. Fayette

Int. C1. G03g 15/09

XEROX DISCLOSURE JOURNAL - Vol. 18, No. 1 January/February 1993 51

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TONER AEROSOL SUPPRESSION(Cont'd)

A developer unit having a system of internal ports and vents in combination with closely spaced lead and trail edge housing baf'fles or trim bars provide compensation for the pumping action of developer rolls and a means to equalize the air pressure between interior chambers in the development housing affording effective toner aerosol suppression. A developer housing design that effectively controls and prevents toner aerosol emissions is disclosed.

Dry development systems in electrophotographic copiers and printers mix developer materials at varying speeds using a variety of rolls, magnets, augers, and the like. Developer housings usually bring the developer materials into contact with an imaging member containing a latent image to be developed. The process of rapidly mixing the developer material and developing the image typically generates pressure variations within and around the developer housing and may also generate aerosolized toner particles. The toner aerosol may escape the developer housing causing contamination problems in the printing process.

Previous approaches for controlling airborne toner emissions used foam or...