US5200289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge control agent combination for a liquid toner
Assignee: ADVANCED IMAGING PRODUCTS Corp
•
Filing: 1991-12-04
•
Granted: 1993-04-06
•
Expires: 2011-12-04
Abstract
Abstract A liquid toner composition for electrophotography comprising a dispersion which includes a carrier liquid, pigmented or dyed toner particles, an inorganic binder insoluble in the carrier liquid at room temperature and a charge control agent in a charge directing amount, said charge control agent comprising lecithin, 1% to 2.5% by weight, based on the total weight of active components in the charge control agent, of an alkylated N-vinyl pyrrolidone polymer, and 0.5% to 10% by weight, based on the total weight of active components in the charge control agent, of an oil soluble or dispersible anionic surfactant.
Inventors
- 👤 Roy J. Harrington
- 👤 George A. Gibson
- 👤 Margate T. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:44
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131; G03G9/135; G03G9/1355
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
87 words
A liquid toner composition for electrophotography in the form of a dispersion comprising: (a) a carrier liquid; (b) pigmented or dyed particles; (c) a binder material insoluble in said carrier liquid; (d) a charge control agent in a charge directing amount; (e) said charge control agent comprising, lecithin, an alkylated N-vinyl pyrrolidone polymer which is soluble in the carrier liquid, and 0.5% to 10% by weight, based on the total weight of active components of the charge control agent, of an oil soluble or dispersible anionic surfactant.
Claim 2
Dependent Claim
87 words
A liquid toner composition for electrophotography in the form of a dispersion comprising: (a) a carrier liquid; (b) pigmented or dyed particles; (c) a binder material insoluble in said carrier liquid; (d) a charge control agent in a charge directing amount; (e) said charge control agent comprising, lecithin, an alkylated N-vinyl pyrrolidone polymer which is soluble in the carrier liquid, and 0.5% to 10% by weight, based on the total weight of active components of the charge control agent, of an oil soluble or dispersible anionic surfactant.
Claim 3
Dependent Claim
17 words
The toner composition of claim 1 wherein said polymer is comprised of N-vinyl pyrrolidone copolymerized with lecithin.
Claim 4
Dependent Claim
18 words
The toner composition of claim 2 wherein said surfactant is metal or non-metal salt of a hydrophobic acid.
Claim 5
Dependent Claim
15 words
The toner composition of claim 3 wherein said surfactant is an oil soluble petroleum sulfonate.
Claim 6
Dependent Claim
13 words
The toner composition of claim 4 wherein said surfactant is basic barium sulfonate.
Claim 7
Dependent Claim
29 words
The toner composition of claim 5 wherein the ratio of lecithin to alkylated N-vinyl pyrrolidone polymer, on an active ingredient basis, is in the range of 1:1 to 1:9.
Claim 8
Dependent Claim
25 words
The toner composition of claim 1 wherein said pigmented or dyed particles have an average particle size within the range of 0.1 to 10 microns.
Claim 9
Independent Claim
136 words
A method of creating an image on a substrate by electrophotography, comprising the steps of: (a) supplying said substrate having an image area; (b) advancing said substrate at a speed of 100-1,000 feet/minute; (c) applying an electrostatic charge to the image area of said substrate to form a latent electrostatic image; and (d) developing said image by applying to said substrate image area a liquid toner composition comprising: (1) a carrier liquid; (2) pigmented or dyed particles; (3) a binder; (4) a charge control agent in a charge directing amount; (5) said charge control agent comprising, lecithin an alkylated N-vinyl pyrrolidone polymer, which is soluble in the carrier liquid, and 0.5% to 10% by weight, based on the total weight of active components of the charge control agent, of an oil soluble or dispersible anionic surfactant.
Claim 10
Independent Claim
136 words
A method of creating an image on a substrate by electrophotography, comprising the steps of: (a) supplying said substrate having an image area; (b) advancing said substrate at a speed of 100-1,000 feet/minute; (c) applying an electrostatic charge to the image area of said substrate to form a latent electrostatic image; and (d) developing said image by applying to said substrate image area a liquid toner composition comprising: (1) a carrier liquid; (2) pigmented or dyed particles; (3) a binder; (4) a charge control agent in a charge directing amount; (5) said charge control agent comprising, lecithin an alkylated N-vinyl pyrrolidone polymer, which is soluble in the carrier liquid, and 0.5% to 10% by weight, based on the total weight of active components of the charge control agent, of an oil soluble or dispersible anionic surfactant.
Claim 11
Dependent Claim
16 words
The method of claim 8 wherein said polymer is comprised of N-vinyl pyrrolidone copolymerized with lecithin.
Claim 12
Dependent Claim
17 words
The method of claim 9 wherein said surfactant is metal or non-metal salt of a hydrophobic acid.
Claim 13
Dependent Claim
14 words
The method of claim 10 wherein said surfactant is an oil soluble petroleum sulfonate.
Claim 14
Dependent Claim
12 words
The method of claim 11 wherein said surfactant is basic barium sulfonate.
Claim 15
Dependent Claim
28 words
The method of claim 12 wherein the ratio of lecithin to alkylated N-vinyl pyrrolidone polymer, on an active ingredient basis, is in the range of 1:1 to 1:9.
Claim 16
Dependent Claim
24 words
The method of claim 8 wherein said pigmented or dyed particles have an average particle size within the range of 0.1 to 10 microns.
Claim 17
Dependent Claim
68 words
A method of creating an image on a substrate comprising the steps of: (a) supplying said substrate having an image area; (b) advancing said substrate at a speed of 100-1,000 feet/minute; (c) applying an electrostatic charge to the image area of said substrate to form a latent electrostatic image; and (d) developing said image by applying to said substrate image area the liquid toner composition of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |