US3795443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic development
Assignee: Xerox Corp
•
Filing: 1968-08-26
•
Granted: 1974-03-05
•
Expires: 1988-08-26
Abstract
Abstract A method and apparatus for developing an electrostatic charge pattern with an ultrasonically generated uncharged droplet mist. The apparatus comprises an ultrasonic transducer which is energized from a power source and which has the capability of generating uncharged droplet mist particles from a liquid material. The droplet mist so created is brought into contact with the electrostatic charge pattern to effect its development without regard to image or charge polarity.
Inventors
- 👤 Geldern R Heine
- 👤 A Amidon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:26
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
57 words
A method of developing a charge differential image pattern on a support comprising, ultrasonically generating an uncharged droplet mist of chargedepositable liquid material without further treating said mist to impart a charge thereto, and subjecting a support bearing a charge differential pattern to said uncharged mist for a controlled time period to produce a developed image thereon.
Claim 2
Independent Claim
57 words
A method of developing a charge differential image pattern on a support comprising, ultrasonically generating an uncharged droplet mist of chargedepositable liquid material without further treating said mist to impart a charge thereto, and subjecting a support bearing a charge differential pattern to said uncharged mist for a controlled time period to produce a developed image thereon.
Claim 3
Dependent Claim
14 words
The method according to claim 1 in which said mist comprises an aqueous suspension.
Claim 4
Dependent Claim
26 words
The method according to claim 1 in which the droplets comprising said mist are of a size predominantly in the range of less than 200 microns.
Claim 5
Dependent Claim
17 words
The method according to claim 1 in which the mist generating frequency is at least 20 kilocycles.
Claim 6
Independent Claim
58 words
A method of image reproduction comprising, forming a charge pattern of the original of said image on the surface of a dielectric member, ultrasonically generating a droplet mist of uncharged charge-depositable liquid material, and presenting the charge bearing dielectric surface into contact with said uncharged mist droplets for a controlled time period To produce a developed image thereon.
Claim 7
Independent Claim
58 words
A method of image reproduction comprising, forming a charge pattern of the original of said image on the surface of a dielectric member, ultrasonically generating a droplet mist of uncharged charge-depositable liquid material, and presenting the charge bearing dielectric surface into contact with said uncharged mist droplets for a controlled time period To produce a developed image thereon.
Claim 8
Independent Claim
88 words
A method of image reproduction comprising, forming a charge pattern of the original of said image on the surface of a dielectric member, placing an imaging sheet in superposed contiguous relation overlying the charge pattern on said surface, ultrasonically generating a droplet mist of uncharged charge-depositable liquid material without further treating said mist to impart a charge thereto, and presenting the imaging sheet on the charge bearing dielectric surface into contact with said uncharged mist for a controlled time period to produce a developed image on said sheet.
Claim 9
Independent Claim
88 words
A method of image reproduction comprising, forming a charge pattern of the original of said image on the surface of a dielectric member, placing an imaging sheet in superposed contiguous relation overlying the charge pattern on said surface, ultrasonically generating a droplet mist of uncharged charge-depositable liquid material without further treating said mist to impart a charge thereto, and presenting the imaging sheet on the charge bearing dielectric surface into contact with said uncharged mist for a controlled time period to produce a developed image on said sheet.
Claim 10
Dependent Claim
101 words
Apparatus for forming a xerographic reproduction comprising in combination, a xerographic plate, means to form an image charge pattern on the surface of said plate, ultrasonic generating means, a source of liquid developer material, means to present controlled quantities of liquid from said source into transducing contact with said ultrasonic generating means whereby said contacting liquid is formed into an uncharged mist-like atmosphere in the absence of other means adapted to impart a charge to said mist, and means to support the image bearing plate in said uncharged mist-like atmosphere for a controlled time period to produce a developed image thereon.
Claim 11
Dependent Claim
101 words
Apparatus for forming a xerographic reproduction comprising in combination, a xerographic plate, means to form an image charge pattern on the surface of said plate, ultrasonic generating means, a source of liquid developer material, means to present controlled quantities of liquid from said source into transducing contact with said ultrasonic generating means whereby said contacting liquid is formed into an uncharged mist-like atmosphere in the absence of other means adapted to impart a charge to said mist, and means to support the image bearing plate in said uncharged mist-like atmosphere for a controlled time period to produce a developed image thereon.
Claim 12
Dependent Claim
109 words
Apparatus for forming a xerographic reproduction comprising in combination, a xerographic plate, means to form an image charge pattern on the surface of said plate, a source of liquid developer material, ultrasonic generating means supporting at least partially within said liquid source below the liquid level thereof and operable at frequencies of at least 20 kilocycles whereby a quantity of liquid is transformed above said source into an uncharged mist-like atmosphere in the absence of other means adapted to impart a charge to said mist, and means to support the image bearing plate in said uncharged mist-like atamosphere for a controlled time period to produce a developed image thereon.
Claim 13
Dependent Claim
109 words
Apparatus for forming a xerographic reproduction comprising in combination, a xerographic plate, means to form an image charge pattern on the surface of said plate, a source of liquid developer material, ultrasonic generating means supporting at least partially within said liquid source below the liquid level thereof and operable at frequencies of at least 20 kilocycles whereby a quantity of liquid is transformed above said source into an uncharged mist-like atmosphere in the absence of other means adapted to impart a charge to said mist, and means to support the image bearing plate in said uncharged mist-like atamosphere for a controlled time period to produce a developed image thereon.
Claim 14
Independent Claim
90 words
A method of image reproduction comprising, forming without the use of an external applied charge, a charge pattern of the original on a solid surface which has previously been stored in a cool dark environment, ultrasonically generating a droplet mist of uncharged charge-depositable liquid material having a droplet size of less than about 0.5 micron without further treating said mist to impart a charge thereto, and presenting the latent image bearing solid surface into contact with said uncharged mist for a controlled time period to produce a developed image thereon.
Claim 15
Independent Claim
90 words
A method of image reproduction comprising, forming without the use of an external applied charge, a charge pattern of the original on a solid surface which has previously been stored in a cool dark environment, ultrasonically generating a droplet mist of uncharged charge-depositable liquid material having a droplet size of less than about 0.5 micron without further treating said mist to impart a charge thereto, and presenting the latent image bearing solid surface into contact with said uncharged mist for a controlled time period to produce a developed image thereon.
Claim 16
Independent Claim
67 words
A method of developing a charge differential image pattern on a support comprising, ultrasonically vibrating a quantity of liquid developer material to generate an uncharged droplet mist of the liquid developer material, and subjecting said support proximate to said uncharged droplet mist of said liquid developer material, said droplet mist being attracted to said support in accordance with the differential charge pattern to produce a developed image.
Claim 17
Independent Claim
67 words
A method of developing a charge differential image pattern on a support comprising, ultrasonically vibrating a quantity of liquid developer material to generate an uncharged droplet mist of the liquid developer material, and subjecting said support proximate to said uncharged droplet mist of said liquid developer material, said droplet mist being attracted to said support in accordance with the differential charge pattern to produce a developed image.
Claim 18
Independent Claim
68 words
A method of image reproduction comprising, forming a differential charge pattern over a support, ultrasonically vibrating a quantity of liquid developer material to generate an uncharged droplet mist of the liquid developer material, and subjecting said support proximate to said uncharged droplet mist of said liquid developer material, said droplet mist being attracted to said support in accordance with the differential charge pattern to produce a developed image.
Claim 19
Independent Claim
68 words
A method of image reproduction comprising, forming a differential charge pattern over a support, ultrasonically vibrating a quantity of liquid developer material to generate an uncharged droplet mist of the liquid developer material, and subjecting said support proximate to said uncharged droplet mist of said liquid developer material, said droplet mist being attracted to said support in accordance with the differential charge pattern to produce a developed image.
References Cited (Backward Citations)
US2690394A
Cited
US3178281A
Cited
US3166420A
Cited
US3166418A
Cited
US3165299A
Cited
GB1107746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |