Browse Prior Art Database

Configuration for Containing Mix Beads in a Photoconductor Drum

IP.com Disclosure Number: IPCOM000040008D
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Bierschbach, JE: AUTHOR [+3]

Abstract

In a drum configuration using an incrementing photoconductor (PC), developer mix beads can work themselves into the drum past the seal and randomly be advanced onto the surface of the drum underneath the PC, resulting in a copy quality service call. (Image Omitted) Strip magnets placed next to the surface seals have been used to alleviate this problem. An improvement in the incrementing drum configuration is described which further reduces the problem. In an incrementing drum configuration (see figure) unused PC 10 is advanced from supply spool 11 past seal 12 around rotating drum 13 and back into the drum onto take-up spool 14 as used PC. In the normal configuration, the direction of the PC travel is the same as the rotating drum.

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

Configuration for Containing Mix Beads in a Photoconductor Drum

In a drum configuration using an incrementing photoconductor (PC), developer mix beads can work themselves into the drum past the seal and randomly be advanced onto the surface of the drum underneath the PC, resulting in a copy quality service call.

(Image Omitted)

Strip magnets placed next to the surface seals have been used to alleviate this problem. An improvement in the incrementing drum configuration is described which further reduces the problem. In an incrementing drum configuration (see figure) unused PC 10 is advanced from supply spool 11 past seal 12 around rotating drum 13 and back into the drum onto take-up spool 14 as used PC. In the normal configuration, the direction of the PC travel is the same as the rotating drum. In the improved configuration, PC 10 is designed to travel in a direction counter to the drum rotation. As illustrated in the figure, the natural tendency due to this rotation is for the mix beads 15 to deposit in the nip between PC 10 and take-up spool 14 where they are trapped and have no affect on copy quality. Magnetic strips can be used, if desired, to increase the probability of trapping stray mix beads.

1

Page 2 of 2

2

[This page contains 5 pictures or other non-text objects]