US3815989A - Electrophotographic copy systems - Google Patents
Electrophotographic copy systems Download PDFInfo
- Publication number
- US3815989A US3815989A US00315104A US31510472A US3815989A US 3815989 A US3815989 A US 3815989A US 00315104 A US00315104 A US 00315104A US 31510472 A US31510472 A US 31510472A US 3815989 A US3815989 A US 3815989A
- Authority
- US
- United States
- Prior art keywords
- toner particles
- roller
- image
- latent image
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
- G03G15/11—Removing excess liquid developer, e.g. by heat
Definitions
- a latent electrostatic image is formed on the surface of a photoconductive insulating material.
- the image on the photoconductive insulating layer is developed by applying toner particles having a charge to be attracted to the charge of the latent image and the toner particles are then transferred to a copy sheet, forming thereon an image corresponding to the latent electrostatic image.
- a liquid developer comprising charged essentially solid toner particles dispersed in a carrier liquid
- the photoconductive insulating layer is wetted all over with the liquid developer composition and tends to retain sufficient toner in the background areas to discolor the printed copy.
Abstract
Description
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00315104A US3815989A (en) | 1972-12-14 | 1972-12-14 | Electrophotographic copy systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00315104A US3815989A (en) | 1972-12-14 | 1972-12-14 | Electrophotographic copy systems |
Publications (1)
Publication Number | Publication Date |
---|---|
US3815989A true US3815989A (en) | 1974-06-11 |
Family
ID=23222910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00315104A Expired - Lifetime US3815989A (en) | 1972-12-14 | 1972-12-14 | Electrophotographic copy systems |
Country Status (1)
Country | Link |
---|---|
US (1) | US3815989A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3981267A (en) * | 1975-05-20 | 1976-09-21 | Savin Business Machines Corporation | Electrophotographic liquid developing system |
US4023899A (en) * | 1974-06-29 | 1977-05-17 | Ricoh Co., Ltd. | Excess developing liquid removing device for electrophotography |
US4045217A (en) * | 1974-12-24 | 1977-08-30 | Ricoh Company, Ltd. | Developing process for electrophotography |
US4139653A (en) * | 1973-01-10 | 1979-02-13 | Agfa-Gevaert N.V. | Method for the development of electrostatic charge patterns |
US4168119A (en) * | 1974-12-27 | 1979-09-18 | Canon Kabushiki Kaisha | Electrophotographic copying apparatus utilizing liquid developer |
DE3018241A1 (en) * | 1979-05-15 | 1980-11-27 | Savin Corp | METHOD AND DEVICE FOR REMOVING DEVELOPER LIQUID |
USRE30477E (en) * | 1979-05-10 | 1981-01-13 | Savin Corporation | Electrophotographic liquid developing system |
US4253761A (en) * | 1976-04-17 | 1981-03-03 | Kabushiki-Kaisha Kip | Cleaning devices for use in electrophotographic apparatus |
US4278343A (en) * | 1976-04-22 | 1981-07-14 | Ricoh Co., Ltd. | Inversion developing method for electrophotography and relevant apparatuses |
US5255058A (en) * | 1991-01-22 | 1993-10-19 | Spectrum Sciences B.V. | Liquid developer imaging system using a spaced developing roller and a toner background removal surface |
US5574548A (en) * | 1994-04-18 | 1996-11-12 | Minolta Camera Kabushiki Kaisha | Method and device for developing with a liquid |
US5576815A (en) * | 1995-09-29 | 1996-11-19 | Minnesota Mining And Manufacturing Company | Development apparatus for a liquid electrographic imaging system |
US5596398A (en) * | 1995-09-29 | 1997-01-21 | Minnesota Mining & Manufacturing Company | Apparatus and method for cleaning developer from an imaging substrate |
EP0813123A2 (en) * | 1993-01-11 | 1997-12-17 | Indigo N.V. | Improved latent image development apparatus |
US5713068A (en) * | 1995-09-29 | 1998-01-27 | Minnesota Mining And Manufacturing Company | Apparatus and method for removing developer liquid from an imaging substrate |
US5737673A (en) * | 1995-09-29 | 1998-04-07 | Minnesota Mining And Manufacturing Company | Apparatus for removal of back-plated developer from a development device |
US5754928A (en) * | 1995-09-29 | 1998-05-19 | Minnesota Mining And Manufacturing Company | Squeegee apparatus and method for removing developer liquid from an imaging substrate |
US5802436A (en) * | 1997-03-04 | 1998-09-01 | Minnesota Mining And Manufacturing Company | Apparatus for removal of back-plated developer from a development device |
US5805963A (en) * | 1995-09-29 | 1998-09-08 | Minnesota Mining And Manufacturing Company | Apparatus and method for removing developer liquid from an imaging substrate |
US6091918A (en) * | 1995-09-29 | 2000-07-18 | Minnesota Mining And Manufacturing Company | Squeegee apparatus and method for removing developer liquid from an imaging substrate |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155546A (en) * | 1962-09-24 | 1964-11-03 | Plastic Coating Corp | Apparatus for the liquid toning of latent electrostatic images |
US3284224A (en) * | 1963-01-04 | 1966-11-08 | Xerox Corp | Controlled xerographic development |
US3663219A (en) * | 1967-05-23 | 1972-05-16 | Canon Camera Co | Electrophotographic process |
-
1972
- 1972-12-14 US US00315104A patent/US3815989A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155546A (en) * | 1962-09-24 | 1964-11-03 | Plastic Coating Corp | Apparatus for the liquid toning of latent electrostatic images |
US3284224A (en) * | 1963-01-04 | 1966-11-08 | Xerox Corp | Controlled xerographic development |
US3663219A (en) * | 1967-05-23 | 1972-05-16 | Canon Camera Co | Electrophotographic process |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4139653A (en) * | 1973-01-10 | 1979-02-13 | Agfa-Gevaert N.V. | Method for the development of electrostatic charge patterns |
US4023899A (en) * | 1974-06-29 | 1977-05-17 | Ricoh Co., Ltd. | Excess developing liquid removing device for electrophotography |
US4045217A (en) * | 1974-12-24 | 1977-08-30 | Ricoh Company, Ltd. | Developing process for electrophotography |
US4168119A (en) * | 1974-12-27 | 1979-09-18 | Canon Kabushiki Kaisha | Electrophotographic copying apparatus utilizing liquid developer |
US3981267A (en) * | 1975-05-20 | 1976-09-21 | Savin Business Machines Corporation | Electrophotographic liquid developing system |
US4253761A (en) * | 1976-04-17 | 1981-03-03 | Kabushiki-Kaisha Kip | Cleaning devices for use in electrophotographic apparatus |
US4278343A (en) * | 1976-04-22 | 1981-07-14 | Ricoh Co., Ltd. | Inversion developing method for electrophotography and relevant apparatuses |
USRE30477E (en) * | 1979-05-10 | 1981-01-13 | Savin Corporation | Electrophotographic liquid developing system |
DE3018241A1 (en) * | 1979-05-15 | 1980-11-27 | Savin Corp | METHOD AND DEVICE FOR REMOVING DEVELOPER LIQUID |
US5255058A (en) * | 1991-01-22 | 1993-10-19 | Spectrum Sciences B.V. | Liquid developer imaging system using a spaced developing roller and a toner background removal surface |
EP0813123A2 (en) * | 1993-01-11 | 1997-12-17 | Indigo N.V. | Improved latent image development apparatus |
EP0813123A3 (en) * | 1993-01-11 | 1998-01-14 | Indigo N.V. | Improved latent image development apparatus |
US5574548A (en) * | 1994-04-18 | 1996-11-12 | Minolta Camera Kabushiki Kaisha | Method and device for developing with a liquid |
US5596398A (en) * | 1995-09-29 | 1997-01-21 | Minnesota Mining & Manufacturing Company | Apparatus and method for cleaning developer from an imaging substrate |
US5576815A (en) * | 1995-09-29 | 1996-11-19 | Minnesota Mining And Manufacturing Company | Development apparatus for a liquid electrographic imaging system |
US5713068A (en) * | 1995-09-29 | 1998-01-27 | Minnesota Mining And Manufacturing Company | Apparatus and method for removing developer liquid from an imaging substrate |
US5737673A (en) * | 1995-09-29 | 1998-04-07 | Minnesota Mining And Manufacturing Company | Apparatus for removal of back-plated developer from a development device |
US5754928A (en) * | 1995-09-29 | 1998-05-19 | Minnesota Mining And Manufacturing Company | Squeegee apparatus and method for removing developer liquid from an imaging substrate |
US5758236A (en) * | 1995-09-29 | 1998-05-26 | Minnesota Mining And Manufacturing Company | Development apparatus for a liquid electrographic imaging system |
US5805963A (en) * | 1995-09-29 | 1998-09-08 | Minnesota Mining And Manufacturing Company | Apparatus and method for removing developer liquid from an imaging substrate |
US6091918A (en) * | 1995-09-29 | 2000-07-18 | Minnesota Mining And Manufacturing Company | Squeegee apparatus and method for removing developer liquid from an imaging substrate |
US5802436A (en) * | 1997-03-04 | 1998-09-01 | Minnesota Mining And Manufacturing Company | Apparatus for removal of back-plated developer from a development device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: WILMINGTON TRUST COMPANY A DE BANKING CORP. TRUST Free format text: SECURITY INTEREST;ASSIGNOR:NASHUA CORPORATION A DE CORP.;REEL/FRAME:004164/0358 Effective date: 19830719 Owner name: WADE, WILLIAM J. INDIVIDUAL TRUSTEE UNDER THE TRUS Free format text: SECURITY INTEREST;ASSIGNOR:NASHUA CORPORATION A DE CORP.;REEL/FRAME:004164/0358 Effective date: 19830719 |
|
AS | Assignment |
Owner name: WILMINGTON TRUST COMPANY, A DE BANKING CORP. Free format text: AMENDMENT OF TRUST AGREEMENT AND COLLATERAL DOCUMENTS DATED FEBRUARY 15,1984 SUBJECT TO CONDITIONS RECITED;ASSIGNOR:NASHUA CORPORATION A DE CORP.;REEL/FRAME:004262/0597 Effective date: 19840215 |
|
AS | Assignment |
Owner name: NASHUA CORPORATION A DE CORP Free format text: RELEASED BY SECURED PARTY;ASSIGNORS:WILMINGTON TRUST COMPANY A DE BANKING CORP. (TRUSTEE);WADE, WILLIAM J. INDIVIDUAL TRUSTEE;REEL/FRAME:004391/0920 Effective date: 19850419 |