Patent US1415312A successfully refreshed from Google Patents.
US4587192A
Expired / Lapsed
US
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Developing apparatus for the liquid development of electrostatic charge images
Assignee: Hoechst AG
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Filing: 1984-08-09
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Granted: 1986-05-06
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Expires: 2004-08-09
Abstract
Abstract Disclosed is a developing apparatus and process for the liquid development of electrostatic charge images on an image carrier material. The developing apparatus includes a device for spraying a liquid developer onto the image carrier material to be developed, and a developing electrode connected to a direct-current voltage source. The developing electrode comprises an electrically conductive web positioned in operative relationship to the image carrier layer, the web is unwound from a supply roll and wound up on a take-up roll, the distance of the web-shaped developing electrode from the surface of the image carrier material being adjustable by means of at least one guide roll.
Inventors
- 👤 Erwin Lind
- 👤 Helmuth Haberhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:32
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
106 words
A developing apparatus for the liquid development of electrostatic charge images on an image carrier material, comprising: a base over which the image carrier material is transported; a device for spraying a liquid developer onto the image carrier material to be developed; a developing electrode connected to a direct-current voltage source, said electrode comprising an electrically conductive web; means for advancing the conductive web in relation to the image carrier material; and at least one guide roll means for adjusting the distance between said electrically conductive web and the image carrier material and for passing said electrically conductive web in relation to the image carrier material.
Claim 2
Dependent Claim
106 words
A developing apparatus for the liquid development of electrostatic charge images on an image carrier material, comprising: a base over which the image carrier material is transported; a device for spraying a liquid developer onto the image carrier material to be developed; a developing electrode connected to a direct-current voltage source, said electrode comprising an electrically conductive web; means for advancing the conductive web in relation to the image carrier material; and at least one guide roll means for adjusting the distance between said electrically conductive web and the image carrier material and for passing said electrically conductive web in relation to the image carrier material.
Claim 3
Dependent Claim
25 words
A developing apparatus as claimed in claim 1, further comprising a supply roll and a take-up roll for supplying and transporting said electrically conductive web.
Claim 4
Dependent Claim
34 words
A developing apparatus as claimed in claim 1, wherein said developing electrode is connected to a variable direct-current voltage source and wherein one pole of said direct-current voltage source is connected to said base.
Claim 5
Dependent Claim
21 words
A developing apparatus as claimed in claim 2, wherein said take-up roll is connected to a variable direct current voltage source.
Claim 6
Dependent Claim
35 words
A developing apparatus as claimed in claim 1, further comprising at least two adjustable guide rolls positioned upstream of said spraying device and at least two adjustable guide rolls positioned downstream of said spraying device.
Claim 7
Dependent Claim
26 words
A developing apparatus as claimed in claim 5, further comprising a deflection roll located above said spraying device and over which said electrically conductive web passes.
Claim 8
Dependent Claim
36 words
A developing apparatus as claimed in claim 1, further comprising at least two air nozzles, one of said nozzles for drying said developing electrode and the other of said nozzles for drying the image carrying material.
Claim 9
Dependent Claim
34 words
A developing apparatus as claimed in claim 7, wherein said at least two nozzles are positioned at a distance of about 1 to 3 mm from said developing electrode and the image carrier material.
Claim 10
Dependent Claim
18 words
A developing apparatus as claimed in claim 1, wherein said electrically conductive web material comprises a metal foil.
Claim 11
Dependent Claim
16 words
A developing apparatus as claimed in claim 9, wherein said metal foil comprises an aluminum foil.
Claim 12
Dependent Claim
21 words
A developing apparatus as claimed in claim 10, wherein said developing electrode includes a roughened, bright rolled or a high-resistivity surface.
Claim 13
Dependent Claim
22 words
A developing apparatus as claimed in claim 1, wherein said electrically conductive web material comprises a vaporized metal-coated or metal-clad plastic film.
Claim 14
Dependent Claim
22 words
A developing apparatus as claimed in claim 1, wherein said electrically conductive web material comprises a vaporized metal-coated or metal-clad paper sheet.
Claim 15
Dependent Claim
27 words
A developing apparatus as claimed in claim 1, wherein the distance between said developing electrode and the image carrier material ranges from about 0.5 to 2 mm.
Claim 16
Dependent Claim
27 words
A developing apparatus as claimed in claim 14, wherein the distance between said developing electrode and the image carrier material ranges from about 1 to 1.5 mm.
Claim 17
Dependent Claim
24 words
A developing apparatus as claimed in claim 1, wherein said electrically conductive web material has a thickness of from about 20 to 100 μm.
Claim 18
Dependent Claim
21 words
A developing apparatus as claimed in claim 16, wherein said electrically conductive web material has a thickness of about 50 μm.
Claim 19
Dependent Claim
60 words
A developing apparatus as claimed in claim 1, wherein said means for advancing the conductive web comprises a supply roll and a take-up roll between which the conductive web is provided, such that the conductive web is wound off the supply roll and wound up onto said take-up roll as it is advanced in relation to the image carrier material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |