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Browse Prior Art Database

CONTACTLESS METERING OF MAGNETIC TONER

IP.com Disclosure Number: IPCOM000023418D
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-30
Document File: 2 page(s) / 297K

Publishing Venue

Xerox Disclosure Journal

Abstract

An arrangement for cleaning magnetic toner particles 3 from a photoconductive imaging surface 2 and depositing them in a collection bin 6- The cleaning arrangement includes a ro-tatable non-magnetic sleeve within which is positioned a stationary magnetic field defining means, in the form of a cylindrical permanent magnet.

This text was extracted from a PDF file.
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This is the abbreviated version, containing approximately 91% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

CONTACTLESS METERING OF MAGNETIC
TONER
Alan J, Liebman
Leroy M~ Nyc

7

Proposed Classification
U~S~Cl~ 118/644
Int~ Cl~ B05b 5/02

An arrangement for cleaning magnetic toner particles 3 from a
photoconductive imaging surface 2 and depositing them in a
collection bin 6~ The cleaning arrangement includes a ro~
tatable non~magnetic sleeve within which is positioned a
stationary magnetic field defining means, in the form of a
cylindrical permanent magnet.

It has been found that the best cleaning action occurs when
the cleaning roller is allowed to retain a thin layer of
magnetic toner as it goes into the photoreceptor nip 4~ The
reason for this may be that the particles in the retained thin
layer have high local gradients in magnetic field due to their
small radius~ This raises the local magnetic force at the
photoreceptor and enables higher removing force to act upon
the residual toner layer on the photoreceptor.

2

/

5

3

Volume 2 Number 5 September/October 1977 49

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

Page 2 of 2

CONTACTLESS METERING OF MAGNETIC TONER (Cont~d)

The thin layer of toner is retained on the roll, as shown
above, by creating a low magnetic force region 5 in a suitable
place around the circumference of the cleaning roller, Lower
magnetic force is achievable by enlarging inter~polar spacing
or lowering magnet charging current, A relatively higher
field is maintained in the region 1 where the stripping of the
toner particles from the imagin...