EP0330498A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Non-magnetic toner
Assignee: Canon Inc
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Filing: 1989-02-24
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Granted: —
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Expires: 2009-02-24
Abstract
Abstract A developer for developing electrostatic images, comprising a non-magnetic toner, the toner containing 17 - 60 % by number of non-magnetic toner particles of 5 microns or smaller, containing 1 - 30 % by number of non-magnetic toner particles of 8 - 12.7 microns, and containing 2.0 % by volume or less of non-magnetic toner particles of 16 microns or larger; wherein the non-magnetic toner has a volume-average particle size of 4 - 10 microns, and the non-magnetic toner particles of 5 microns or smaller have a particle size distribution satisfying the following formula: N/V = -0.04N + k, wherein N denotes % by number of non-magnetic toner particles of 5 microns or smaller, V denotes % by volume of non-magnetic toner particles of 5 microns or smaller, k denotes a positive number of 4.5 - 6.5, and N denotes a positive number of 17 - 60.
Inventors
- 👤 Kiichiro Sakashita
- 👤 Hirohide Tanikawa
- 👤 Satoshi Yoshida
- 👤 Toshiaki Nakahara
- 👤 Naoki Matsushige
- 👤 Masatsugu Fujiwara
- 👤 Yasuo Mitsuhashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/0819; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/104
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
173 words
A developer for developing electrostatic images, comprising a non-magnetic toner, said toner containing 17 - 60 % by number of non-magnetic toner particles having a particle size of 5 microns or smaller, containing 1 - 30 % by number of non-magnetic toner particles having a particle size of 8 - 12.7 microns, and containing 2.0 % by volume or less of nonmagnetic toner particles having a particle size of 16 microns or larger; wherein the non-magnetic toner has a volume-average particle size of 4 - 10 microns, and the non-magnetic toner particles having a particle size of 5 microns or smaller have a particle size distribution satisfying the following formula: N/V = -0.04N + k, wherein N denotes the percentage by number of nonmagnetic toner particles having a particle size of 5 micron or smaller, V denotes the percentage by volume of non-magnetic toner particles having a particle size of 5 microns or smaller, k denotes a positive number of 4.5 - 6.5, and N denotes a positive number of 17 - 60.
Claim 2
Dependent Claim
173 words
A developer for developing electrostatic images, comprising a non-magnetic toner, said toner containing 17 - 60 % by number of non-magnetic toner particles having a particle size of 5 microns or smaller, containing 1 - 30 % by number of non-magnetic toner particles having a particle size of 8 - 12.7 microns, and containing 2.0 % by volume or less of nonmagnetic toner particles having a particle size of 16 microns or larger; wherein the non-magnetic toner has a volume-average particle size of 4 - 10 microns, and the non-magnetic toner particles having a particle size of 5 microns or smaller have a particle size distribution satisfying the following formula: N/V = -0.04N + k, wherein N denotes the percentage by number of nonmagnetic toner particles having a particle size of 5 micron or smaller, V denotes the percentage by volume of non-magnetic toner particles having a particle size of 5 microns or smaller, k denotes a positive number of 4.5 - 6.5, and N denotes a positive number of 17 - 60.
Claim 3
Dependent Claim
30 words
A developer according to Claim 1, wherein the. non-magnetic toner contains 1 - 23 % by number of non-magnetic toner particles having a particle size of 8 - 12.7 microns.
Claim 4
Dependent Claim
30 words
A developer according to Claim 1, wherein the non-magnetic toner contains 25 - 50 % by number of non-magnetic toner particles having a particle size of 5 microns or smaller.
Claim 5
Dependent Claim
30 words
A developer according to Claim 1, wherein the non-magnetic toner contains 30 - 50 % by number of non-magnetic toner particles having a particle size of 5 microns or smaller.
Claim 6
Dependent Claim
30 words
A developer according to Claim 1, wherein the non-magnetic toner contains 8 - 20 % by number of non-magnetic toner particles having a particle size of 8 - 12.7 microns.
Claim 7
Dependent Claim
47 words
A developer according to Claim 1, wherein the non-magnetic toner particles having a particle size of 5 microns or smaller satisfy the following formula: N/V = -0.04 + k, wherein k denotes a number of 4.5 - 6.0, and N denotes a number of 25 - 50.
Claim 8
Dependent Claim
46 words
A developer according to Claim 1, wherein the non-magnetic toner particles having a particle size of microns or smaller satisfy the following formula: N/V = -0.04N + k, wherein k denotes a number of 4.5 - 5.5, and N denotes a number of 30 - 50.
Claim 9
Dependent Claim
20 words
A developer according to Claim 1, wherein the non-magnetic toner has a volume-average particle size of 4 - 8 microns.
Claim 10
Dependent Claim
17 words
A developer according to Claim 1, wherein the non-magnetic toner has been mixed with silica fine powder.
Claim 11
Dependent Claim
28 words
A developer according to Claim 9, wherein 0.01 - 8 wt. parts of the silica fine powder has been mixed with 100 wt. parts of the non-magnetic toner.
Claim 12
Dependent Claim
28 words
A developer according to Claim 9, wherein 0.1 - 5 wt. parts of the silica fine powder has been mixed with 100 wt. parts of the non-magnetic toner.
Claim 13
Dependent Claim
21 words
A developer according to Claim 9, wherein the non-magnetic toner has positive chargeability and the silica fine powder has positive chargeability.
Claim 14
Dependent Claim
21 words
A developer according to Claim 9, wherein the non-magnetic toner has negative chargeability and the silica fine powder has negative chargeability.
Claim 15
Dependent Claim
20 words
A developer according to Claim 1, wherein the non-magnetic toner has been mixed with fine powder of a fluorine-containing polymer.
Claim 16
Dependent Claim
32 words
A developer according to Claim 14, wherein the powder of the fluorine-containing polymer is contained in an amount of 0.01 - 2.0 wt. % based on the weight of the non-magnetic toner.
Claim 17
Dependent Claim
33 words
A developer according to Claim 14, wherein the fine powder of the fluorine-containing polymer is contained in an amount of 0.02 - 1.0 wt. % based on the weight of the non-magnetic toner.
Claim 18
Dependent Claim
24 words
A developer according to Claim 1, wherein the non-magnetic toner has been mixed with silica fine powder and fine powder of a fluorine-containing polymer.
Claim 19
Dependent Claim
42 words
A developer according to Claim 17, wherein 0.01 - 8 wt. parts of the silica fine powder and 0.01 - 2.0 wt. % of the fine powder of a fluorine-containing polymer have been mixed with 100 wt. parts of the non-magnetic toner.
Claim 20
Dependent Claim
16 words
A developer according to Claim 1, wherein the non-magnetic toner has been mixed with a carrier.
Claim 21
Dependent Claim
26 words
A developer according to Claim 19, wherein 10 wt. parts of thc non-magnetic toner has been mixed with 10 - 1000 wt. parts of the carrier.
Claim 22
Dependent Claim
26 words
A developer according to Claim 19, wherein 10 wt. parts of the non-magnetic toner has been mixed with 30 - 500 wt. parts of the carrier.
Claim 23
Dependent Claim
19 words
A developer according to Claim 20, wherein the carrier has a volume-average particle size of 4 - 100 microns.
Claim 24
Dependent Claim
18 words
A developer according to Claim 20, wherein the carrier has a volume-average particle size of 10 50 microns.
Claim 25
Dependent Claim
19 words
A developer according to Claim 20, wherein the carrier has a volume-average particle size of 30 - 50 microns.
Claim 26
Dependent Claim
12 words
A developer according to Claim 19, wherein the carrier comprises magnetic particles.
Claim 27
Dependent Claim
16 words
A developer according to Claim 25, wherein the carrier comprises magnetic particles coated with a resin.
Claim 28
Dependent Claim
22 words
A developer according to Claim 25, wherein the non-magnetic toner comprises a polyester resin, a colorant and a dialkylsalicylic acid chromium complex.
Claim 29
Dependent Claim
24 words
A non-magnetic toner for use in the development of electrostatic images containing 17-60% by number of non-magnetic toner particles of 5 microns or below.
Claim 30
Dependent Claim
24 words
A non-magnetic toner for use in the development of electrostatic images containing 17-60% by number of non-magnetic toner particles of 5 microns or below.
Claim 31
Dependent Claim
24 words
A non-magnetic toner for use in the development of electrostatic latent images containing 1-30% by number of non-magnetic toner particles of size 8-12.7 microns.
Claim 32
Dependent Claim
24 words
A non-magnetic toner for use in the development of electrostatic latent images containing 1-30% by number of non-magnetic toner particles of size 8-12.7 microns.
Claim 33
Independent Claim
25 words
A method for developing an electrostatic latent image which comprises applying thereto a toner containing at least 17% of particles of 5 microns or below.
Claim 34
Independent Claim
25 words
A method for developing an electrostatic latent image which comprises applying thereto a toner containing at least 17% of particles of 5 microns or below.
References Cited (Backward Citations)
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