EP0238130A2
Expired / Lapsed
EP
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Toner for electrophotography
Assignee: Artience Co Ltd
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Filing: 1987-03-06
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Granted: —
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Expires: 2007-03-06
Abstract
Abstract A toner for electrophotographs which is prepared by mixing thermoplastic resin core particles (A) having an average size of from 1 to 15µ with a colorant (B) and without or together with at least one of additives in a finely particulate form while applying mechanical strain force to the whole under such conditions that the average size of the resulting toner particles is in the range of 1-20µm whereby the colorant (B) and the other necessary fine particles are embedded substantially as primary particles in the resin core particles (A). A process for production of the toner is also disclosed.
Inventors
- 👤 Masumi Unomori E403 30 Unomori Koishi
- 👤 Manabu C/O Toyo Ink Mfg. Co. Ltd. Sawada
- 👤 Nobuyuki C/O Toyo Ink Mfg. Co. Ltd. Igarashi
- 👤 Akira C/O Toyo Ink Mfg. Co. Ltd. Arikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 09:32
CPC Classifications
G; G03; G03G; G03G5/00; G03G9/00; G03G9/08; G03G9/0802; G03G9/0804; G03G9/0819; G03G9/0825
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
A toner for electrophotographs which is prepared by mixing thermoplastic resin core particles (A) having an average size of from 1-to 15 µm with a colorant (B) while applying mechanical strain force to the materials (A) and (B) under such conditions that the average size of the resulting toner particles is in the range of 1-20 µm whereby the colorant (B) is embedded substantially as primary particles in the resin core particles (A).
Claim 2
Dependent Claim
73 words
A toner for electrophotographs which is prepared by mixing thermoplastic resin core particles (A) having an average size of from 1-to 15 µm with a colorant (B) while applying mechanical strain force to the materials (A) and (B) under such conditions that the average size of the resulting toner particles is in the range of 1-20 µm whereby the colorant (B) is embedded substantially as primary particles in the resin core particles (A).
Claim 3
Dependent Claim
88 words
A toner for electrophotographs which is prepared by mixing thermoplastic resin core particles (A) having an average size of from 1 to 15 µm with a colorant (B) and at least one of additives in a finely particulate form while applying mechanical strain force to the whole under such conditions that the average size of the resulting toner particles is in the range of 1-20 µm whereby the colorant (B) and the other necessary fine particles are embedded substantially as primary particles in the resin core particles (A).
Claim 4
Dependent Claim
88 words
A toner for electrophotographs which is prepared by mixing thermoplastic resin core particles (A) having an average size of from 1 to 15 µm with a colorant (B) and at least one of additives in a finely particulate form while applying mechanical strain force to the whole under such conditions that the average size of the resulting toner particles is in the range of 1-20 µm whereby the colorant (B) and the other necessary fine particles are embedded substantially as primary particles in the resin core particles (A).
Claim 5
Dependent Claim
13 words
A toner according to claim 1, wherein the colorant (B) is a pigment.
Claim 6
Dependent Claim
26 words
A toner according to claim 2, wherein said additives are a magnetic powder, lubricant, flowability-imparting agent, charge controlling agent, low'molecular weight polyolefin and a mixture thereof.
Claim 7
Dependent Claim
51 words
A toner according to claim 1, wherein the mixing while applying mechanical strain force is effected using a mixer in which powders in a fluidized bed state are moved at a high speed along with an air flow, or a mixer having blades or hammers capable of yielding an impact force.
Claim 8
Dependent Claim
77 words
A process for production of a toner for electrophotographs which comprises mixing thermoplastic resin core particles (A) having an average size of from 1 to 15 µm with a colorant (B) while applying mechanical strain force to the materials (A) and (B) under such conditions that the average size of the resulting toner particles is in the range of 1-20 um whereby the colorant (B) is embedded substantially as primary particles in the resin core particles (A).
Claim 9
Dependent Claim
77 words
A process for production of a toner for electrophotographs which comprises mixing thermoplastic resin core particles (A) having an average size of from 1 to 15 µm with a colorant (B) while applying mechanical strain force to the materials (A) and (B) under such conditions that the average size of the resulting toner particles is in the range of 1-20 um whereby the colorant (B) is embedded substantially as primary particles in the resin core particles (A).
Claim 10
Dependent Claim
13 words
A process according to claim 6, wherein the colorant (B) is a pigment.
Claim 11
Dependent Claim
50 words
A process according to claim 6, wherein the mixing while applying mechanical strain force is effected using a mixer in which powders in a fluidized bed state are moved at a high speed along with an.air flow, or a mixer having blades or hammers capable of yielding an impact force.
References Cited (Backward Citations)
No citation records indexed.
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