GB986844A - Improvements in cascade development of electrostatic images - Google Patents

Improvements in cascade development of electrostatic images

Info

Publication number
GB986844A
GB986844A GB13464/61A GB1346461A GB986844A GB 986844 A GB986844 A GB 986844A GB 13464/61 A GB13464/61 A GB 13464/61A GB 1346461 A GB1346461 A GB 1346461A GB 986844 A GB986844 A GB 986844A
Authority
GB
United Kingdom
Prior art keywords
developer
cylinder
point
tangentially
contact
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
GB13464/61A
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 GB986844A publication Critical patent/GB986844A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

986,844. Electrophotographic development. RANK-XEROX Ltd. April 14,1961 [April 15, 1960], No. 13464/61. Heading G2H. The electrostatic image on a rotatable xerographic cylindrical member is developed by cascading granular developer over the outer surface so that the developer is directed to the surface tangentially with a speed greater than that of the cylinder at the point of contact, and allowing the developer to fall away from the cylinder at a point lower than the point of contact. Preferably the point of contact is at a position below the highest point of the cylinder and the speed of the developer stream is sufficient to maintain a speed exceeding that of the cylinder whilst passing over the highest point. As shown an image of a continuously moving film 13 is projected on to the charged photoconductive surface of the continuously rotating drum 10 and the electrostatic charge image so produced is made visible by the developer (toner and carrier) applied by the shoot 25 fed by the hopper conveyer 23. In an alternative arrangement (Fig. 2 not shown) a horizontally moving conveyer fed by a hopper propels developer over a deflecting guide plate whence it is applied tangentially to the cylinder. As a further modification the Specification suggests applying the developer tangentially with the help of air jets. A rotating brush 20 removes residual developer from drum 10 before re-use.
GB13464/61A 1960-04-15 1961-04-14 Improvements in cascade development of electrostatic images Expired GB986844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22439A US3105770A (en) 1960-04-15 1960-04-15 Cascade development improvement

Publications (1)

Publication Number Publication Date
GB986844A true GB986844A (en) 1965-03-24

Family

ID=21809594

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13464/61A Expired GB986844A (en) 1960-04-15 1961-04-14 Improvements in cascade development of electrostatic images

Country Status (4)

Country Link
US (1) US3105770A (en)
DE (1) DE1278244B (en)
FR (1) FR1286397A (en)
GB (1) GB986844A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139922A (en) * 1983-05-11 1984-11-21 Rhone Poulenc Syst Developing a latent image formed on a magnetic surface

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223548A (en) * 1961-05-01 1965-12-14 Xerox Corp Xerographic developing machine and method
US3376849A (en) * 1963-10-14 1968-04-09 Stevens & Co Inc J P Apparatus for the distribution of granular material
US3303817A (en) * 1963-12-23 1967-02-14 Xerox Corp Xerographic developing apparatus
GB1125371A (en) * 1965-02-17 1968-08-28 Unilever Ltd Improvements in or relating to the application of powder to sheets
US3320879A (en) * 1965-10-08 1967-05-23 Monsanto Co Ink delivery system employing vibrating wires
GB1328881A (en) * 1970-03-31 1973-09-05 Agfa Gevaert Electrophotographic development apparatus
US3667427A (en) * 1971-01-28 1972-06-06 Xerox Corp Improved cascade apparatus
US3877417A (en) * 1973-10-15 1975-04-15 Xerox Corp Transfer corona generating device with support brushes
US5298949A (en) * 1991-04-16 1994-03-29 Matsushita Electric Industrial Co., Ltd. Method and apparatus for removing a portion of a developing material deposited on a non-image area of a surface of a latent image carrier
DE69218689T2 (en) * 1991-07-26 1997-07-24 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Electrophotographic process and apparatus therefor
US5985506A (en) * 1992-07-29 1999-11-16 Matsushita Electric Industrial Co., Ltd. Reversal electrophotographic developing method employing recyclable magnetic toner

Family Cites Families (7)

* 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
US2705199A (en) * 1951-09-12 1955-03-29 Harold E Clark Method of developing an electrostatic latent image
US2852651A (en) * 1953-11-02 1958-09-16 Haloid Xerox Inc Fusing mechanism for a xerographic copying machine
US2884348A (en) * 1954-12-20 1959-04-28 Ibm Erasure of imprinted magnetic markings
US2779306A (en) * 1955-03-25 1957-01-29 Ibm Electroscopic toner metering device
US2878120A (en) * 1956-07-03 1959-03-17 Horizons Inc Intermittent electrophotographic recorder
US3013342A (en) * 1958-02-28 1961-12-19 Xerox Corp Xerographic fixing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139922A (en) * 1983-05-11 1984-11-21 Rhone Poulenc Syst Developing a latent image formed on a magnetic surface
US4613554A (en) * 1983-05-11 1986-09-23 Rhone-Poulenc Systemes Process for developing a latent image formed on a magnetic surface, device for carrying out the process and printing apparatus containing the said device

Also Published As

Publication number Publication date
DE1278244B (en) 1968-09-19
FR1286397A (en) 1962-03-02
US3105770A (en) 1963-10-01

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