Patent US3715762A successfully refreshed from Google Patents.
US3715762A
Expired / Lapsed
US
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Method and apparatus for generating electrostatic images using ionized fluid stream
Assignee: International Business Machines Corp
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Filing: 1970-09-04
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Granted: 1973-02-06
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Expires: 1990-09-04
Abstract
Abstract An ionized stream is selectively channeled through a ''''printing head'''' to cause image formation on a precharged dielectric coated sheet or to a drain when it is desired to interrupt image formation. The ionized stream, in one embodiment, is channeled directly to the dielectric sheet to cause image formation and is interrupted by a control stream that diverts the ionized stream to the drain. An alternative embodiment provides for a reversal in the functions of the control stream and the ionized stream so that image formation is obtained only when the ionized stream is diverted.
Inventors
- 👤 P Magill
- 👤 R Mccurry
- 👤 C Speicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:23
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/323; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
The method of forming an electrostatic image on the surface of a dielectric comprising the steps of generating a stream of ions from the pressurized gas, and selectively directing stream of ions to impinge upon discrete portions of said surface to cause the formation of said image by directing a stream of relatively inert gas against the ion stream to divert the latter from impinging upon said surface.
Claim 2
Independent Claim
68 words
The method of forming an electrostatic image on the surface of a dielectric comprising the steps of generating a stream of ions from the pressurized gas, and selectively directing stream of ions to impinge upon discrete portions of said surface to cause the formation of said image by directing a stream of relatively inert gas against the ion stream to divert the latter from impinging upon said surface.
Claim 3
Independent Claim
68 words
The method of forming an electrostatic image on the surface of a dielectric comprising the steps of generating a stream of ions from the pressurized gas, and selectively directing stream of ions to impinge upon discrete portions of said surface to cause the formation of said image by directing a stream of relatively inert gas against the ion stream to divert the latter from impinging upon said surface.
Claim 4
Independent Claim
68 words
The method of forming an electrostatic image on the surface of a dielectric comprising the steps of generating a stream of ions from the pressurized gas, and selectively directing stream of ions to impinge upon discrete portions of said surface to cause the formation of said image by directing a stream of relatively inert gas against the ion stream to divert the latter from impinging upon said surface.
Claim 5
Dependent Claim
24 words
The method of claim 1 further including the step of precharging the surface of said dielectric prior to directing thereon said stream of ions.
Claim 6
Dependent Claim
25 words
The method of claim 1 further including the step of electrically neutralizing the surface of said dielectric prior to directing thereon said stream of ions.
Claim 7
Dependent Claim
42 words
The method of claim 1 in which a pressurized gas stream is utilized to selectively control said stream of ions by directing the gas stream against the ion stream to cause the latter to impinge upon said discrete portions of said surface.
Claim 8
Dependent Claim
168 words
Apparatus for generating an ion stream comprising: an ion generating chamber enclosed by electrically non-conducting walls, a top Plate and a conducting bottom base plate containing a central opening from which said ion stream emerges, a corona discharge wire means supported by said top plate and having an end portion thereof disposed in axial alignment with and in close proximity to said central opening, an opening in said chamber for admitting pressurized gas, and a source of high potential connected across said corona wire and said conducting base plate to cause the generation of said ion stream in the region around said central opening and end portion of said corona wire, a lower head assembly, secured to said bottom base plate, having a vertical channel communicating with said central opening through which said ion stream emerges, and a horizontal channel intersecting said vertical channel; and means for introducing a pressurized gas into said horizontal channel to divert said ion stream from the vertical channel to the horizontal channel.
Claim 9
Dependent Claim
168 words
Apparatus for generating an ion stream comprising: an ion generating chamber enclosed by electrically non-conducting walls, a top Plate and a conducting bottom base plate containing a central opening from which said ion stream emerges, a corona discharge wire means supported by said top plate and having an end portion thereof disposed in axial alignment with and in close proximity to said central opening, an opening in said chamber for admitting pressurized gas, and a source of high potential connected across said corona wire and said conducting base plate to cause the generation of said ion stream in the region around said central opening and end portion of said corona wire, a lower head assembly, secured to said bottom base plate, having a vertical channel communicating with said central opening through which said ion stream emerges, and a horizontal channel intersecting said vertical channel; and means for introducing a pressurized gas into said horizontal channel to divert said ion stream from the vertical channel to the horizontal channel.
Claim 10
Dependent Claim
109 words
Apparatus for forming an electrostatic image on a precharged dielectric surface comprising: an ion generating means for issuing an ion stream, a head assembly secured to said ion generating means and having a vertical channel through which said ion stream passes and emerges to impinge upon portions of said dielectric surface thereby discharging said portions, said assembly further having a horizontal channel intersecting said vertical channel, and means for introducing a pressurized gas into said horizontal channel when it is desired to selectively interrupt the flow of said ion stream on said dielectric surface thereby selectively interrupting the discharging of said surface to cause formation of said electrostatic image.
Claim 11
Dependent Claim
109 words
Apparatus for forming an electrostatic image on a precharged dielectric surface comprising: an ion generating means for issuing an ion stream, a head assembly secured to said ion generating means and having a vertical channel through which said ion stream passes and emerges to impinge upon portions of said dielectric surface thereby discharging said portions, said assembly further having a horizontal channel intersecting said vertical channel, and means for introducing a pressurized gas into said horizontal channel when it is desired to selectively interrupt the flow of said ion stream on said dielectric surface thereby selectively interrupting the discharging of said surface to cause formation of said electrostatic image.
Claim 12
Dependent Claim
112 words
Apparatus for forming an electrostatic image on a precharged dielectric surface comprising: an ion generating means for issuing an ion stream, a head assembly secured to said ion generating means and having a vertical channel through which said ion stream passes and emerges, said assembly further having a horizontal channel intersecting said vertical channel, and means for selectively introducing a pressurized gas into said horizontal channel when it is desired to selectively divert the flow of said ion stream from said vertical channel to and through said horizontal channel and directing a mixture of said streams upon said dielectric surface thereby selectively discharging said surface to cause formation of said electrostatic image.
Claim 13
Dependent Claim
112 words
Apparatus for forming an electrostatic image on a precharged dielectric surface comprising: an ion generating means for issuing an ion stream, a head assembly secured to said ion generating means and having a vertical channel through which said ion stream passes and emerges, said assembly further having a horizontal channel intersecting said vertical channel, and means for selectively introducing a pressurized gas into said horizontal channel when it is desired to selectively divert the flow of said ion stream from said vertical channel to and through said horizontal channel and directing a mixture of said streams upon said dielectric surface thereby selectively discharging said surface to cause formation of said electrostatic image.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |