Browse Prior Art Database

TONER MIXTURE FOR IMPROVED IMAGE QUALITY AND HIGH PERFORMANCE BLADE CLEANING

IP.com Disclosure Number: IPCOM000023466D
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 352K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to xerographic development modes and techniques wherein a first layer of fine particles is used to develop the image followed by a second layer or layers of conventional toner material of larger particle size deposited upon the first layer of fine particles to develop the image. The second layer of conventional toner of larger particle size is transferred to a suitable substrate. One type of toner mixture for developing an image in this manner is designated as a toner mixture having a bi-modal size distribution. An-other type of development system for developing an image in this manner is described as a double development system where-in a first developer mixture having small particles (not necessarily toner) and an appropriate carrier is used to develop the image followed by a second developer mixture having larger toner particles and an appropriate carrier to develop the image with a second layer of toner. These devel-opment modes and toner mixtures provide improved background suppression, improved resolution and alleviation of hollow character problems.

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XEROX DISCLOSURE JOURNAL

TONER MIXTURE FOR IMPROVED IMAGE Proposed Classification
QUALITY AND HIGH PERFORMANCE U.S. Cl. 96/1
BLADE CLEANING Int. Cl. G03g
Narendra S. God

This disclosure relates to xerographic development modes and
techniques wherein a first layer of fine particles is used to
develop the image followed by a second layer or layers of
conventional toner material of larger particle size deposited
upon the first layer of fine particles to develop the image.
The second layer of conventional toner of larger particle size
is transferred to a suitable substrate. One type of toner
mixture for developing an image in this manner is designated
as a toner mixture having a bi-modal size distribution. An-
other type of development system for developing an image in
this manner is described as a double development system where-
in a first developer mixture having small particles (not
necessarily toner) and an appropriate carrier is used to
develop the image followed by a second developer mixture
having larger toner particles and an appropriate carrier to
develop the image with a second layer of toner. These devel-
opment modes and toner mixtures provide improved background
suppression, improved resolution and alleviation of hollow
character problems.

In those systems where the fine particles are made of a hard
material (not necessarily toner) and the second layer of
larger toner particles is deposited thereon, the transferred
image is dense with little or no background appearing upon the...