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

Copier with Contamination Minimization

IP.com Disclosure Number: IPCOM000089217D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Robbins, WE: AUTHOR

Abstract

When a cut-sheet copier fails to supply a sheet of paper for a toned photoconductor image as this image passes through the copier's transfer station, toner contamination of the copier, and particularly overloading of its cleaning station, can occur.

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 100% of the total text.

Page 1 of 2

Copier with Contamination Minimization

When a cut-sheet copier fails to supply a sheet of paper for a toned photoconductor image as this image passes through the copier's transfer station, toner contamination of the copier, and particularly overloading of its cleaning station, can occur.

In the disclosed copier, lens 10 forms the latent image of original document 11 on drum photoconductor 12. The photoconductor's nonworking area (i.e., the area surrounding the photoconductor's latent image) is erased at erase station 13, leaving only the latent image to be toned as it passes through developer 14. Preferably, developer 14 includes a development electrode, such as a magnetic brush roller having a development electrode bias connected thereto.

As the latent image is being formed and the photoconductor's nonworking area is being erased, a sheet of plain paper is being supplied from paper supply bin 15. This sheet is fed with leading edge registration to the photoconductor's latent image as the image passes through transfer station 16.

Sheet detectors (not shown) within sheet path 17 detect the successful supplying of a sheet from bin 15. If a sheet is not detected, these detectors operate to immediately change the above-mentioned development electrode bias-potential level to minimize the amount of toner placed on the photoconductor's latent image by developer 14.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]