Browse Prior Art Database

COLOR PRINTER DEVELOPER HOUSING

IP.com Disclosure Number: IPCOM000026057D
Original Publication Date: 1989-Dec-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 69K

Publishing Venue

Xerox Disclosure Journal

Abstract

A color electrophotographic printing machine uses three or four developer housings. When the printing machine uses a cylindrical photoconductive drum, each developer housing is arranged in a generally radial pattern relative to the drum. An advantage in this arrangement is that as the distance from the drum center increases, there is more space in the circumferential direction for larger components. However, each housing is at a different angle with respect to gravity so that the developer material flow patterns are not identical. This prevents the developer housings from being identical to one another, and thereby increases manufacturing costs and the number of replacements parts required for maintenance. In order to overcome this problem, the developer housing may be arran ed parallel to one another

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KEROX DISCLOSURE JOURNAL

COLOR PRINTER DEVELOPER Proposed Classification HOUSING U.S. C1.355/326 James R. Davidson Int. C1. G03g 15/01

A color electrophotographic printing machine uses three or four developer housings. When the printing machine uses a cylindrical photoconductive drum, each developer housing is arranged in a generally radial pattern relative to the drum. An advantage in this arrangement is that as the distance from the drum center increases, there is more space in the circumferential direction for larger components. However, each housing is at a different angle with respect to gravity so that the developer material flow patterns are not identical. This prevents the developer housings from being identical to one another, and thereby increases manufacturing costs and the number of replacements parts required for maintenance. In order to overcome this problem, the developer housing may be arran ed parallel to one another

relatively long and slender in cross section. Parallel developer housings may be made substantially identical to one another and interchangeable to reduce cost and simplify manufacturing. Parallel developer housings have different angles of contact with the photoconductive drum, requiring that the pattern of the magnetic field in each developer housing be adapted to the different contact angles, and that the proper cover openings be provided. A set of housings is proposed in which the magnetic pattern can be readily adapted to the va...