Patent EP0468604B1 successfully refreshed from Google Patents.
EP0468604B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Color imaging system
Assignee: HP Indigo BV
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Filing: 1990-05-14
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Granted: 1995-02-01
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Expires: 2010-05-14
Abstract
No abstract record available.
Inventors
- 👤 Benzion Landa
- 👤 Ishaiau Lior
- 👤 Amiran Lavon
- 👤 Dan Barnea
- 👤 Paul Fenster
- 👤 Uri Levy
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 22:40
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/104; G03G15/01; G03G15/0105; G03G15/0121; G03G15/101; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A multicolor system for imaging with a plurality of liquid developers, each developer comprising carrier liquid, toner particles and charge director, the system comprising: an imaging surface (10) adapted to sequentially support a series of electrostatic images; separate reservoirs (40, 42, 44, 46) for each of said plurality of liquid developers; and a common developer system for selectively developing said electrostatic images with one of said plurality of liquid developers, characterized in that it includes means (204), responsive to the charging of at least one of said liquid developers, for supplying charge director at said common developer system for separately maintaining the charge level of said at least one liquid developer.
Claim 2
Dependent Claim
51 words
A system according to claim 1, wherein said common developer system comprises: a rotating cylindrical developing electrode whose surface moves in adjacent spaced relationship to said imaging surface, and said means for supplying supplies said charge director onto said developing electrode surface after it leaves the proximity of said imaging surface.
Claim 3
Dependent Claim
37 words
A system according to claim 2 wherein said common developer system comprises a plurality of single color cleaning assemblies (92) for removing material from said developing electrode, each corresponding to a given one of said liquid developers.
Claim 4
Dependent Claim
26 words
A system according to claim 3 and also including means for supplying material removed by said cleaning assemblies from said developing electrode to its respective reservoir.
Claim 5
Independent Claim
78 words
A system according to any of claims 1-4 wherein said developer system further comprises: multicolor spray means (14, 69, 81, 15 or 120) for supplying liquid developer of a selectable color to said electrostatic imaging surface, said spray means comprising a multiplicity of spray outlets (70, 108, 121) wherein each of the outlets supplies liquid developer of one of at least two selected colors, which color being different from the color supplied by at least one neighboring outlet.
Claim 6
Independent Claim
149 words
A system for imaging with liquid developer, the developer comprising carrier liquid, toner particles and charge director, the system comprising: an electrostatic imaging surface (10); means (11, 12) for forming an electrostatic image to said electrostatic imaging surface; a reservoir for said liquid developer (40, 42, 44, 46); a developer electrode (17) for developing said electrostatic image with said liquid developer to form a developed image; means for supplying (14, 69, 81, 15 or 120) said liquid developer to said electrostatic surface and for removing (92) residual liquid developer from said developer electrode and returning said removed developer to said reservoir; and means (20) for transferring said developed image to a substrate, characterized in that it also includes charge director supply means (204) responsive to the charge level of said liquid developer, for supplying charge director at said developer electrode for maintaining the charge level of said liquid developer.
Claim 7
Dependent Claim
21 words
A system according to claim 6 wherein said means for supplying directly delivers said liquid developer to said electrostatic imaging surface.
Claim 8
Dependent Claim
34 words
A system according to claims 6 or claim 7 wherein said means for removing is also operative to remove said charge director from said developer electrode for supplying said charge director to said reservoir.
Claim 9
Independent Claim
52 words
A system according to any of claims 6-8 wherein said developer electrode comprises: a rotating cylindrical developing electrode whose surface moves in adjacent spaced relationship to said imaging surface, and said means for supplying supplies said charge director onto said developing electrode surface after it leaves the proximity of said imaging surface.
Claim 10
Dependent Claim
44 words
A system according to claim 9 and wherein said means for removing comprises a plurality of single color cleaning assemblies (92) for removing material including charge director supplied thereto from said developing electrode, each assembly corresponding to a given one of said liquid developers.
Claim 11
Dependent Claim
25 words
A system according to claim 10 and including means for supplying material removed by said cleaning assemblies from said developing electrode to its respective reservoir.
References Cited (Backward Citations)
No citation records indexed.
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