GB1196637A - Apparatus for Reducing Unwanted Powder Cloud Development - Google Patents

Apparatus for Reducing Unwanted Powder Cloud Development

Info

Publication number
GB1196637A
GB1196637A GB45730/67A GB4573067A GB1196637A GB 1196637 A GB1196637 A GB 1196637A GB 45730/67 A GB45730/67 A GB 45730/67A GB 4573067 A GB4573067 A GB 4573067A GB 1196637 A GB1196637 A GB 1196637A
Authority
GB
United Kingdom
Prior art keywords
toner
electrode
biased
image areas
potential
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
Application number
GB45730/67A
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.)
Xerox Ltd
Original Assignee
Rank Xerox Ltd
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 Rank Xerox Ltd filed Critical Rank Xerox Ltd
Publication of GB1196637A publication Critical patent/GB1196637A/en
Expired legal-status Critical Current

Links

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
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0801—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer for cascading

Abstract

1,196,637. Developing electrostatic images. RANK XEROX Ltd. Oct. 6, 1967 [Oct.11, 1966], No. 45730/67. Heading G2H. An electrostatic latent image on a drum 10 is cascade developed by a developer having a toner and carrier supplied in random manner by buckets 14 to full under gravity between plates 20, 22. A development electrode 26 of conductive material is biased by a potential source 32 to the same polarity as the image areas and opposite to that of the toner, the potential being higher than that of the non-image areas such that toner is attracted away from such non-image areas to reduce background. A second electrode 28 biased to a high potential, e.g. 1500 volts and of opposite polarity to the toner particles attracts clouds of toner formed by the cascading toner some of which accumulates on the electrode while the remainder is drawn into the flow of the cascading carrier particles. In another embodiment Fig. 3 (not shown) a development electrode (36) and a second electrode (40) are mounted on a member (38) and connected to separate potentials. A baffle (46) carries a biased insulating layer (50) and plate 48 to collect toner which has fallen beyond the electrode (40).
GB45730/67A 1966-10-11 1967-10-06 Apparatus for Reducing Unwanted Powder Cloud Development Expired GB1196637A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US585921A US3412710A (en) 1966-10-11 1966-10-11 Cleanup electrode

Publications (1)

Publication Number Publication Date
GB1196637A true GB1196637A (en) 1970-07-01

Family

ID=24343532

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45730/67A Expired GB1196637A (en) 1966-10-11 1967-10-06 Apparatus for Reducing Unwanted Powder Cloud Development

Country Status (5)

Country Link
US (1) US3412710A (en)
BE (1) BE704923A (en)
DE (1) DE1597890C3 (en)
GB (1) GB1196637A (en)
NL (1) NL6713355A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020768A1 (en) * 1978-08-28 1981-01-07 Ricoh Company, Ltd Electrophotographic copying machine

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3649262A (en) * 1968-12-31 1972-03-14 Xerox Corp Simultaneous development-cleaning of the same area of an electrostatographic image support surface
US3670700A (en) * 1969-07-03 1972-06-20 Xerox Corp Development electrode
US3620191A (en) * 1969-07-03 1971-11-16 Xerox Corp Biased input chute
US3638610A (en) * 1969-07-03 1972-02-01 Xerox Corp Development apparatus
US3611992A (en) * 1969-07-03 1971-10-12 Xerox Corp Cleanup electrode
BE755383A (en) * 1969-08-29 1971-03-01 Xerox Corp APPARATUS FOR THE CONTROL OF DEVELOPMENT ELECTRODES
US3682538A (en) * 1970-03-19 1972-08-08 Xerox Corp Xerographic pick-off plate
US3696784A (en) * 1970-12-15 1972-10-10 Xerox Corp Xerographic development apparatus
US3754962A (en) * 1970-12-21 1973-08-28 Ibm Development of electrostatic images
US3865612A (en) * 1971-04-13 1975-02-11 Rank Xerox Ltd Xerographic development method
US3818864A (en) * 1971-09-14 1974-06-25 Xerox Corp Image developing apparatus
US3908037A (en) * 1971-09-14 1975-09-23 Xerox Corp Image developing techniques
US3799113A (en) * 1972-06-28 1974-03-26 Xerox Corp Hybrid development of electrostatic latent image
US3865080A (en) * 1973-01-17 1975-02-11 Xerox Corp Toner pickoff apparatus
US4387982A (en) * 1981-07-01 1983-06-14 Xerox Corporation Charged particle containment apparatus
JPS5821771A (en) * 1981-08-01 1983-02-08 Konishiroku Photo Ind Co Ltd Developing device for electrostatic latent image
EP0240042A1 (en) * 1986-02-25 1987-10-07 Coulter Stork Patents B.V. Method and device for the development of a latent electrostatic image

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573881A (en) * 1948-11-02 1951-11-06 Battelle Development Corp Method and apparatus for developing electrostatic images with electroscopic powder
US2952241A (en) * 1955-02-03 1960-09-13 Haloid Xerox Inc Developer electrode for electrophotographic apparatus
US3011474A (en) * 1959-02-06 1961-12-05 Harold O Ulrich Xerographic development electrode apparatus
US3147147A (en) * 1961-06-05 1964-09-01 Xerox Corp Xerographic developing apparatus and electrode
US3303817A (en) * 1963-12-23 1967-02-14 Xerox Corp Xerographic developing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020768A1 (en) * 1978-08-28 1981-01-07 Ricoh Company, Ltd Electrophotographic copying machine
EP0020768A4 (en) * 1978-08-28 1981-02-04 Ricoh Kk Electrophotographic copying machine.

Also Published As

Publication number Publication date
NL6713355A (en) 1968-04-16
BE704923A (en) 1968-02-15
US3412710A (en) 1968-11-26
DE1597890C3 (en) 1979-11-22
DE1597890B2 (en) 1979-03-08
DE1597890A1 (en) 1970-09-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee