Browse Prior Art Database

TONER MIXTURE TO REDUCE BACKGROUND TRANSFER EFFECTS

IP.com Disclosure Number: IPCOM000023467D
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 325K

Publishing Venue

Xerox Disclosure Journal

Abstract

The disclosure relates to those modes of development where a toner comprising a mixture of different size toner particles is used to develop a latent electrostatic image in xero-graphic-type development systems. The toner mixture is commonly designated as a bi-modal size distribution of partic-les, exemplary of which is a toner mixture having particles of about 10 - 15 microns in diameter and particles of about 1 - 5 microns in diameter. The toner mixture may be applied to the image to be developed by a single step process or by a dual development system wherein the developer is a first developer having fine particles and a carrier therefor and a second developer of larger particles and a carrier therefor.

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XEROX DISCLOSURE JOURNAL

TONER MIXTURE TO REDUCE BACK- Proposed Classification
GROUND TRANSFER EFFECTS U.S. Cl. 96/1
Stephen F. Pond mt. Cl. G03g

The disclosure relates to those modes of development where a
toner comprising a mixture of different size toner particles
is used to develop a latent electrostatic image in xero-
graphic-type development systems. The toner mixture is
commonly designated as a bi-modal size distribution of partic-
les, exemplary of which is a toner mixture having particles of
about 10 - 15 microns in diameter and particles of about 1 - 5
microns in diameter. The toner mixture may be applied to the
image to be developed by a single step process or by a dual
development system wherein the developer is a first developer
having fine particles and a carrier therefor and a second
developer of larger particles and a carrier therefor.

In the foregoing system, the smallest toner particles adhere
to the photoconductor substrate first and form a layer there-
on, and the larger particles accumulate on the first layer to
form a second layer of larger particles. The larger particles
are not deposited in the background area, and accordingly,
upon transfer, mainly large particles are transferred leaving
the small particles behind on the photoconductor.

In accordance with the instant disclosure, the toner mixture
comprises conventional large toner particles and small or fine
colorless toner particles. Accordingly, when all or most of
the small or fine particles are colorless a...