EP0099243A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fluid jet assisted electrographic marking apparatus
Assignee: Xerox Corp
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Filing: 1983-07-06
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Granted: —
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Expires: 2003-07-06
Abstract
Abstract @ A fluid jet assisted electrographic marking apparatus for ion projection printing wherein ions are generated in a chamber (32), entrained in a rapidly moving fluid stream passing into, through and out of the chamber (32), modulated in an electroded exit zone (36) by being selectively emitted or inhibited therein, and finally deposited in an imagewise pattern on a relatively movable charge receptor (48).
Inventors
- 👤 Robert W. Gundlach
- 👤 Richard F. Bergen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 16:26
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/323; B; B41; B41J; B41J2202/00; B41J2202/01; B41J2202/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A fluid jet assisted electrographic marking apparatus for placing electrostatic charges upon a charge receptor in an image-wise pattern, said apparatus being characterized by transport fluid supply means (24), ion means (14) comprising an electrically conductive chamber (32), connected to a reference potential, and an elongated corona wire (34) positioned in said chamber and connected to a high potential source, said chamber and said corona wire extending in a direction transverse to the direction of transport fluid flow, ion entrainment means comprising inlet means (30) for delivering transport fluid into said chamber and outlet means (36) for directing transport fluid out of said chamber, said inlet means and said outlet means extending in said transverse direction and modulation means (38) comprising a plurality of spaced, individually controllable, electrodes located adjacent the path of the exiting ion entraining transport fluid, each electrode selectively connectible to a low potential source for neutralizing the ions in selected portions of the exiting entraining fluid, whereby the ions allowed to pass to the charge receptor represent a desired charge pattern.
Claim 2
Dependent Claim
175 words
A fluid jet assisted electrographic marking apparatus for placing electrostatic charges upon a charge receptor in an image-wise pattern, said apparatus being characterized by transport fluid supply means (24), ion means (14) comprising an electrically conductive chamber (32), connected to a reference potential, and an elongated corona wire (34) positioned in said chamber and connected to a high potential source, said chamber and said corona wire extending in a direction transverse to the direction of transport fluid flow, ion entrainment means comprising inlet means (30) for delivering transport fluid into said chamber and outlet means (36) for directing transport fluid out of said chamber, said inlet means and said outlet means extending in said transverse direction and modulation means (38) comprising a plurality of spaced, individually controllable, electrodes located adjacent the path of the exiting ion entraining transport fluid, each electrode selectively connectible to a low potential source for neutralizing the ions in selected portions of the exiting entraining fluid, whereby the ions allowed to pass to the charge receptor represent a desired charge pattern.
Claim 3
Dependent Claim
39 words
A fluid jet assisted electrographic marking apparatus according to claim 1 characterized in that said inlet means (30) and said outlet means (36) each comprises a slit-like metering orifice for raising the velocity of the transport fluid passing therethrough.
Claim 4
Dependent Claim
54 words
A fluid jet assisted electrographic marking apparatus according to claim 1, characterized in that said transport fluid supply means (24) comprises a compression pump (26) and a collection chamber (24) connected together by duct means (28) and said inlet means (30) is disposed between said collection chamber (24) and said electrically conductive chamber (32).
Claim 5
Dependent Claim
32 words
A fluid jet assisted electrographic marking apparatus according to claim 1, 2 or 3, characterized in that said inlet means (30) is positioned to direct the transport fluid over said wire (34).
Claim 6
Dependent Claim
42 words
A fluid jet assisted electrographic marking apparatus according to claim 4, characterized in that said electrically conductive chamber (32) is cylindrical in cross-section and said inlet means (30) and said outlet means (36) are in alignment and are diametrically opposite one another.
Claim 7
Dependent Claim
35 words
A fluid jet assisted electrographic marking apparatus according to claim 1, characterized in that said control electrodes (38) are located within said outlet means (36), are elongated, and extend in the direction of fluid flow.
Claim 8
Dependent Claim
48 words
A fluid jet assisted electrographic marking apparatus according to claim 1, characterized by further including a backing electrode (42) for supporting the charge receptor, said backing electrode (42) being connected to a high potential source for attracting ions entrained in the exiting fluid jet toward the charge receptor.
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