Browse Prior Art Database

A DEVELOPER ROLL DRIVE

IP.com Disclosure Number: IPCOM000023632D
Original Publication Date: 1978-Aug-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 358K

Publishing Venue

Xerox Disclosure Journal

Abstract

Alternative embodiments of a donor roller employed in a magnetic brush development system are depicted in Figures 1 and 2. As shown in Figure 1, donor roller 62 includes a non-magnetic stationary tubular member 68. End caps 70 and 72 seal tubular member 68. A shaft 74 is mounted within tubular member 68 and serves as a rotatable mounting for magnetic member 76. Roller bearings 78 and 80 drive shaft 74, Thus, magnetic member 76 rotates relative to stationary tubular member 68 at a substantially constant angular velocity. The rotating magnetic member advances the developer material on the surface of tubular member 68 into the development zone.

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 62% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

A DEVELOPER ROLL DRIVE Proposed Classification
R. E. Hewitt U.S. Cl. 355/3
mt. Cl. G03g 15/00

72( (76 5 % m

\ \ '~ \ - \ " \_ \ ',-

~

~'t~/////2~

FIG. /

76)

86 -~ ~ _~74

l'~M

X ~ X \ ~ V

) 1 ~

FIG. 2

Alternative embodiments of a donor roller employed in a
magnetic brush development system are depicted in Figures 1
and 2. As shown in Figure 1, donor roller 62 includes a non~
magnetic stationary tubular member 68. End caps 70 and 72
seal tubular member 68. A shaft 74 is mounted within tubular
member 68 and serves as a rotatable mounting for magnetic
member 76. Roller bearings 78 and 80 drive shaft 74, Thus,
magnetic member 76 rotates relative to stationary tubular
member 68 at a substantially constant angular velocity. The
rotating magnetic member advances the developer material on
the surface of tubular member 68 into the development zone.

Volume 3 Number 4 July/August 1978 257

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

Page 2 of 2

A DEVELOPER ROLL DRIVE (Cont'd)

Tubular member 68 includes an inwardly directed flange 84 for
supporting bearings 80. Magnetic member 76 is secured fixably
to shaft 74 which is driven by motor 82 to rotate relative to
stationary tubular member 68. End caps 70 and 72 securely
seal the interior of tubular member 68 so as to prevent
contamination thereof.

Referring now to Figure 2, donor roller 62 includes steel
shaft 74 mounted rotatably on roller bearings 86 and 88.
Bearings 86 and 88 are mounted in end caps 92 and 90....