US3556050A - Liquid development apparatus - Google Patents

Liquid development apparatus Download PDF

Info

Publication number
US3556050A
US3556050A US739326A US3556050DA US3556050A US 3556050 A US3556050 A US 3556050A US 739326 A US739326 A US 739326A US 3556050D A US3556050D A US 3556050DA US 3556050 A US3556050 A US 3556050A
Authority
US
United States
Prior art keywords
carrier
liquid developer
belt
developer
development
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
Application number
US739326A
Other languages
English (en)
Inventor
William Trachtenberg
Gene H Robinson
Orville C Rodenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US3556050A publication Critical patent/US3556050A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G03G15/108—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer with which the recording material is brought in contact, e.g. immersion or surface immersion development

Definitions

  • the carrier is maintained in spaced relation to the development electrode and both are moved substantially in synchronism so that the developer therebetween is moved therewith at substantially the same linear speed as the carrier.
  • a pressure roll is usually necessary for maintaining the web of material in contact with the pad or cylindrical surface. It is also known in the field of xerography to move a web or carrier having latent electrostatic images thereon over an applicator, the liquid developer being applied under pressure against the surface of the carrier bearing the images. with any one of the aforementioned arrangements the liquid composition is often applied nonuniformly and/or with streaks which can vary in thickness.
  • Still another object of the invention is to provide a device for the liquid development of latent electrostatic images on a carrier in which a development electrode is movable with the carrier andmaintained in a fixed spaced relationship thereto and is also movable in synchronism with the carrier through the developer'at a relatively high linear speed.
  • Yet another object of the invention is to provide a device for the liquid development of latent electrostatic images on a carrier which is at least partially immersed in the liquid developer and by which the liquid developer between the carrier and a movable development electrode in the developer is moved at substantially the same linear speed as the carrier.
  • a device comprising means for moving a carrier through a liquid developer in spaced relation to a developer electrode.
  • the liquid developer is contained in a receptacle and the carrier is guided through the liquid developer together with a development electrode for a distance sufficient to give a developed image of optimum density.
  • the carrier is maintained in spaced relation to the development electrode and both are moved substantially in synchronism so that the developer therebetween is moved therewith at substantially the same linear speed as the carrier.
  • FIG. 1 is a vertical sectional view through one embodiment of a liquid developer apparatus in accordance with the invention
  • FIG. 3 is a vertical sectional view through another embodiment of a liquid developer apparatus in accordance with the invention in which the length of the development path has been increased;
  • FIG. 4 is a vertical sectional view through still another embodiment of the invention in which the length of the development path is determined by the spacing of several separate sets of drums and which discloses a system for drying the carrier after development of the image.
  • a web or carrier 10 comprises a length of xerographic material having a photoconductive layer which hasbeen exposed and bears a latent electrostatic image. Such image is on the surface 11 of the carrier 10.
  • a liquid developer 12 is contained in a receptacle 13 in which a drum 14 is rotatably mounted.
  • Drum 14 comprises a core 15 and can be provided withflangcs 16 secured to said core as shown in FIG. 2.
  • Core 15 is rotatably supported on a shaft 17 that is journaled in an extension 18 fixed to each of sidewalls 19 of receptacle 13.
  • core 15 is scaled so that developer 12 cannot leak past shaft 17.
  • Core 15 can be a conductive material, such as stainless steel, a plastic material, or a plastic material with its peripheral surface 22 covered with a metallic sleeve 23, as shown in FIG. 2.
  • Flanges 16 can be of a metallic or a plastic material and provided with a shoulder 24 for supporting carrior 10. It may be necessary to electrically insulate core from flanges 16 if both are made of an electrically conductive material. As shown in FIG. 2, the width of the core 15 and the distance between the flanges 16 can be varied to accommodate any width of carrier 10.
  • a strip of mm-wide xerographic material that was charged and contact exposed to a negative master was developed by the apparatus shown in FIG. 1. After development, the images were dried and fixed. Using the developing apparatus just described, images resulted which were free of streaking and trailing effects. Uniformity of development was very good and the maximum achievable density was about 2.00. The resolution capability of the developing unit was above 350 lines per millimeter and the spacing between the image surface and the electrode was about 0.080 inch.
  • a longer development path is obtained with a constant size gap being maintained between the belt 45 and the carrier 50.
  • the effective path length can be varied by changing the relationship of the drums 4042, or by changing the level of the liquid developer.
  • the gap between the photoconductor and the electrode can be changed by using flanges having a shoulder of the requisite diameter.
  • FIG. 4 Another embodiment of the invention is disclosed in FIG. 4. in which a set of rolls 70 and 71 guide and move a carrier 72 through a liquid developer 73 in a receptacle 74.
  • the carrier 72 is arranged with its surface 75, which bears the images, facing outwardly and toward a development electrode 76.
  • a second set of rolls 77-78 is arranged in receptacle 74 and completely immersed in the liquid developer 73.
  • the development electrode 76 comprises a flexible stainless steel belt which encompasses the rolls 77 and 78.
  • the rolls 77 and 78 are conductive and connected to a DC supply 79.
  • rolls 70-71 are held at ground potential at all times.
  • a motor 80 is connected through a suitable coupling 81 to one of the rolls 70 or 71 and 77 or 78 to provide means for moving the carrier 72 and the belt 76 in synchronism. Since the rolls 7071 are also at least partially immersed in the liquid developer 73, the liquid developer between the surface 75 and the electrode 76 is moved at substantially the same rate of speed as these elements.
  • a developer replenisher 82 is provided as in the previously-described embodiments.
  • the length of the development path can be varied by making one of the rolls 70, 71 adjustable relative to the other in the direction of the path length, preferably, the roll that is not driven as roll 70 in FIG. 4. By spacing the rolls 77, 78 at a maximum distance relative to the length of the receptacle, the roll 70 can be adjusted to provide quite a range in path length.
  • the embodiments of the invention described hereinabove can be operated with carrier movement of 20 feet to 150 feet per minute. This range of speed of carrier movement for development of the image thereon is considerably greater than that attainable by any of the prior art devices. Also, by making drums 14 and 4042 of insulating materials and making belts 45 and 76 of insulating materials, the images can be fringe developed. In any case, the developed images are free from streaking and trailing due to the movement of the carrier through the liquid developer.
  • the carrier 72 can be dried at a high rate of speed when subjected to a vacuum knife 83, an air knife 84 and a heated drum 85 or a heat gun 86, such elements being arranged beyond the receptacle 74 in the direction of carrier movement and constitute means for removing liquid developer from the carrier and drying the same.
  • the vacuum knife 83 is oriented generally perpendicular to the plane of the carrier 72 and as close to the receptacle 74 as possible.
  • the air knife 84 is tilted at an angle of 3045 with respect to the plane of the carrier 72 and has its discharge opening about only an inch away from the vacuum knife 83.
  • Apparatus for developing a latent electrostatic image on one surface of a carrier comprising:
  • Apparatus for developing a latent electrostatic image on one surface of a carrier comprising:
  • said carrier being maintained by said drums with said one surface in spaced relation to at least the portion of said belt immersed in said liquid developer;
  • each of said drums comprising a central hub for engaging said belt and a pair of spaced, dielectric flanges for supporting said carrier in spaced relation to said belt;
  • the hub of at least one of said drums being electrically conductive

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
US739326A 1968-06-24 1968-06-24 Liquid development apparatus Expired - Lifetime US3556050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73932668A 1968-06-24 1968-06-24

Publications (1)

Publication Number Publication Date
US3556050A true US3556050A (en) 1971-01-19

Family

ID=24971782

Family Applications (1)

Application Number Title Priority Date Filing Date
US739326A Expired - Lifetime US3556050A (en) 1968-06-24 1968-06-24 Liquid development apparatus

Country Status (6)

Country Link
US (1) US3556050A (fr)
BE (1) BE734994A (fr)
CH (1) CH492241A (fr)
DE (1) DE1931601A1 (fr)
FR (1) FR2011582A1 (fr)
GB (1) GB1271750A (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707139A (en) * 1969-09-26 1972-12-26 Fuji Photo Film Co Ltd Liquid type electrophotography developing apparatus
US3750624A (en) * 1970-07-21 1973-08-07 Fuji Photo Film Co Ltd Apparatus for developing electrophotographic continuous web material
US3753419A (en) * 1970-06-22 1973-08-21 Fuji Photo Film Co Ltd Electrophotographic liquid developing apparatus
US3774574A (en) * 1970-12-10 1973-11-27 Fuji Photo Film Co Ltd Development device for electrophotography
US3784397A (en) * 1970-02-04 1974-01-08 Xerox Corp Imaging system
US3796187A (en) * 1970-07-03 1974-03-12 Fuji Photo Film Co Ltd Apparatus for developing continuous electrophotographic photosensitive web material
US3804062A (en) * 1969-11-27 1974-04-16 Fuji Photo Film Co Ltd Electrophotographic developing device
US3817212A (en) * 1972-01-10 1974-06-18 Xerox Corp Electrostatographic liquid development apparatus
US3832975A (en) * 1972-02-14 1974-09-03 Rank Xerox Ltd Electro-photographic apparatus
US3905331A (en) * 1970-11-05 1975-09-16 Ricoh Kk Means for precluding trailing of toner images in electrophotography of the wet type
US3949703A (en) * 1971-12-30 1976-04-13 Savin Business Machines Corporation Self-cleaning developer applicator
US8527412B1 (en) * 2008-08-28 2013-09-03 Bank Of America Corporation End-to end monitoring of a check image send process
CN107335554A (zh) * 2017-06-29 2017-11-10 常州市新创复合材料有限公司 一种碳纤维自动喷涂装置
US9823958B2 (en) 2016-02-08 2017-11-21 Bank Of America Corporation System for processing data using different processing channels based on source error probability
US9952942B2 (en) 2016-02-12 2018-04-24 Bank Of America Corporation System for distributed data processing with auto-recovery
US10067869B2 (en) 2016-02-12 2018-09-04 Bank Of America Corporation System for distributed data processing with automatic caching at various system levels
US10437778B2 (en) 2016-02-08 2019-10-08 Bank Of America Corporation Archive validation system with data purge triggering
US10437880B2 (en) 2016-02-08 2019-10-08 Bank Of America Corporation Archive validation system with data purge triggering
US10460296B2 (en) 2016-02-08 2019-10-29 Bank Of America Corporation System for processing data using parameters associated with the data for auto-processing

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737149A (en) * 1927-04-12 1929-11-26 Cohoe Processes Inc Machine for and method of dyeing cloth and otherwise treating textiles
US1819848A (en) * 1927-12-02 1931-08-18 Luther G Simjian Photographic developing apparatus
US1927886A (en) * 1931-04-25 1933-09-26 Hughes Ind Co Ltd Film coloring machine
US2474717A (en) * 1947-06-21 1949-06-28 Rodney Hunt Machine Co Process and apparatus for tensionless handling of running lengths of materials
US2674113A (en) * 1951-07-06 1954-04-06 American Enka Corp Apparatus for liquid treatment of warps of closely spaced parallel rayon threads
GB770130A (en) * 1954-06-02 1957-03-13 Julien Dungler Device for the impregnation of web materials
US3367791A (en) * 1966-07-11 1968-02-06 Addressograph Multigraph Liquid development of electrostatic images
US3368526A (en) * 1965-12-01 1968-02-13 Tokyo Shibaura Electric Co Apparatus for developing electrostatic latent images by liquid developing system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737149A (en) * 1927-04-12 1929-11-26 Cohoe Processes Inc Machine for and method of dyeing cloth and otherwise treating textiles
US1819848A (en) * 1927-12-02 1931-08-18 Luther G Simjian Photographic developing apparatus
US1927886A (en) * 1931-04-25 1933-09-26 Hughes Ind Co Ltd Film coloring machine
US2474717A (en) * 1947-06-21 1949-06-28 Rodney Hunt Machine Co Process and apparatus for tensionless handling of running lengths of materials
US2674113A (en) * 1951-07-06 1954-04-06 American Enka Corp Apparatus for liquid treatment of warps of closely spaced parallel rayon threads
GB770130A (en) * 1954-06-02 1957-03-13 Julien Dungler Device for the impregnation of web materials
US3368526A (en) * 1965-12-01 1968-02-13 Tokyo Shibaura Electric Co Apparatus for developing electrostatic latent images by liquid developing system
US3367791A (en) * 1966-07-11 1968-02-06 Addressograph Multigraph Liquid development of electrostatic images

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707139A (en) * 1969-09-26 1972-12-26 Fuji Photo Film Co Ltd Liquid type electrophotography developing apparatus
US3804062A (en) * 1969-11-27 1974-04-16 Fuji Photo Film Co Ltd Electrophotographic developing device
US3784397A (en) * 1970-02-04 1974-01-08 Xerox Corp Imaging system
US3753419A (en) * 1970-06-22 1973-08-21 Fuji Photo Film Co Ltd Electrophotographic liquid developing apparatus
US3796187A (en) * 1970-07-03 1974-03-12 Fuji Photo Film Co Ltd Apparatus for developing continuous electrophotographic photosensitive web material
US3750624A (en) * 1970-07-21 1973-08-07 Fuji Photo Film Co Ltd Apparatus for developing electrophotographic continuous web material
US3905331A (en) * 1970-11-05 1975-09-16 Ricoh Kk Means for precluding trailing of toner images in electrophotography of the wet type
US3774574A (en) * 1970-12-10 1973-11-27 Fuji Photo Film Co Ltd Development device for electrophotography
US3949703A (en) * 1971-12-30 1976-04-13 Savin Business Machines Corporation Self-cleaning developer applicator
US3817212A (en) * 1972-01-10 1974-06-18 Xerox Corp Electrostatographic liquid development apparatus
US3832975A (en) * 1972-02-14 1974-09-03 Rank Xerox Ltd Electro-photographic apparatus
US8527412B1 (en) * 2008-08-28 2013-09-03 Bank Of America Corporation End-to end monitoring of a check image send process
US9823958B2 (en) 2016-02-08 2017-11-21 Bank Of America Corporation System for processing data using different processing channels based on source error probability
US10437778B2 (en) 2016-02-08 2019-10-08 Bank Of America Corporation Archive validation system with data purge triggering
US10437880B2 (en) 2016-02-08 2019-10-08 Bank Of America Corporation Archive validation system with data purge triggering
US10460296B2 (en) 2016-02-08 2019-10-29 Bank Of America Corporation System for processing data using parameters associated with the data for auto-processing
US9952942B2 (en) 2016-02-12 2018-04-24 Bank Of America Corporation System for distributed data processing with auto-recovery
US10067869B2 (en) 2016-02-12 2018-09-04 Bank Of America Corporation System for distributed data processing with automatic caching at various system levels
CN107335554A (zh) * 2017-06-29 2017-11-10 常州市新创复合材料有限公司 一种碳纤维自动喷涂装置
CN107335554B (zh) * 2017-06-29 2019-04-05 常州市新创智能科技有限公司 一种碳纤维自动喷涂装置

Also Published As

Publication number Publication date
CH492241A (fr) 1970-06-15
DE1931601A1 (de) 1970-01-08
GB1271750A (en) 1972-04-26
FR2011582A1 (fr) 1970-03-06
BE734994A (fr) 1969-08-29

Similar Documents

Publication Publication Date Title
US3556050A (en) Liquid development apparatus
US4325627A (en) Method and apparatus for liquid-developing latent electrostatic images
US3152012A (en) Apparatus for the development of electrostatic images
US3368526A (en) Apparatus for developing electrostatic latent images by liquid developing system
US2761416A (en) Development mechanism for electrostatic images
US3907423A (en) Excess developing liquid removing device
US3407786A (en) Applicator device
US3671806A (en) Method of and apparatus for applying an electrical charge to a moving sheet of flexible material
US4482242A (en) Device and method for stripping developer liquid from a photoconductive surface
US4482241A (en) Device and method for stripping developer from a photoconductive surface
US3941469A (en) Dry type developing device for a copying apparatus or like apparatus
US4073266A (en) Apparatus for developing a latent electrostatic image on an electrophotographic copying material
US4242434A (en) Toner composition for multiple copy electrostatic photography
US4686936A (en) Liquid development system
US3375806A (en) Xerographic donor development apparatus
JPS602659B2 (ja) 電子写真装置
CA1107952A (fr) Appareil de developpement de materiaux de reproduction electrophotographique
US3722994A (en) Method and device for removing developing liquid
US3557752A (en) Electrophotographic developing apparatus
US3817615A (en) Device for preventing soiling of the trailing end portion of a transfer sheet
US3446649A (en) Developing electrostatic images with a liquid developer
US4849784A (en) Method and apparatus for high resolution liquid toner electrostatic transfer
US4099487A (en) Roller with adjustable length
US3808025A (en) Liquid developing method for electrophotography
JPS5934573A (ja) 画像形成装置