SU902680A3 - Electrophotographic printer - Google Patents

Electrophotographic printer Download PDF

Info

Publication number
SU902680A3
SU902680A3 SU721870826A SU1870826A SU902680A3 SU 902680 A3 SU902680 A3 SU 902680A3 SU 721870826 A SU721870826 A SU 721870826A SU 1870826 A SU1870826 A SU 1870826A SU 902680 A3 SU902680 A3 SU 902680A3
Authority
SU
USSR - Soviet Union
Prior art keywords
carrier
paper
image
transfer
particles
Prior art date
Application number
SU721870826A
Other languages
Russian (ru)
Inventor
Э.Ликти Карл
Original Assignee
Ксерокс Корпорейшн (Фирма)
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
Priority to US00214244A priority Critical patent/US3809472A/en
Application filed by Ксерокс Корпорейшн (Фирма) filed Critical Ксерокс Корпорейшн (Фирма)
Application granted granted Critical
Publication of SU902680A3 publication Critical patent/SU902680A3/en

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/04Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/045Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
    • G03G15/047Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas for discharging non-image areas
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/04Arrangements for exposing and producing an image
    • G03G2215/0429Changing or enhancing the image
    • G03G2215/0431Producing a clean non-image area, i.e. avoiding show-around effects
    • G03G2215/0434Parameters defining the non-image area to be cleaned
    • G03G2215/0443Copy medium outline relative to the charge image
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/04Arrangements for exposing and producing an image
    • G03G2215/0429Changing or enhancing the image
    • G03G2215/0431Producing a clean non-image area, i.e. avoiding show-around effects
    • G03G2215/0434Parameters defining the non-image area to be cleaned
    • G03G2215/0446Magnification degree
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/04Arrangements for exposing and producing an image
    • G03G2215/0429Changing or enhancing the image
    • G03G2215/0431Producing a clean non-image area, i.e. avoiding show-around effects
    • G03G2215/0448Charge-erasing means for the non-image area

Abstract

A pre-development exposure assembly is provided within an electrostatic reproduction machine transverse to the photoconductive surface thereof to selectively expose side portions of the photoconductive surface in response to a signal generated by a switch associated with the paper supply assembly responsive to paper size therein.

Description

one
This invention relates to an electrostatic photograph, namely an electrophotographic apparatus.
An electrophotographic copying apparatus is known, which contains an electrophotographic carrier, charging, exposing, developing, transferring, fixing an image, a discharge device with a light source and a paper feeding device Sh.
A disadvantage of the known electrophotographic copying machine is the low quality of the copies obtained.
The purpose of the invention is to improve the quality of copies by neutralizing the charges on the non-exposed side portions of the electrophotographic carrier, depending on the size of paper used.
This goal is achieved by the fact that the proposed electrophotographic apparatus further comprises a microswitch connected to a discharge device and mounted on a paper-compatible device.
FIG. 1 shows the proposed electrophotographic copying machine, general view; in fig. 2 - the same, top view; on 4ig. 3 - section AA
5 of FIG. 2
The electrophotographic photocopier contains a transparent stop 1 fixed on the lighting device 2 and mounted on the left
10 edge of the machine.
On table 1, document 3 is placed, from which a copy is taken. Light clouds from a light source refresh document 3, creating an image that
15 is projected by the optical system onto the photosensitive surface of the electrophotographic carrier 4 located on the tape 5.
20Electrophotographic carrier 4

Claims (1)

  1. consists of a photoconductive layer of selenium deposited on a substrate, which is injected into the light-perceiving surface and the medium carrying the image in the apparatus. . 390 The surface of the carrier 4 is made photo sensitive due to the wep 6 charge, the key creating the corona charge. The carrier 4 is mounted on three rollers 7, 8 and 9 parallel to the axes to dry the continuous movement. Tape 5 is movably mounted on two carrier shafts 10 and 11 with roller 9 rotating on shaft 1O driven by engine and gearbox (not shown) at constant speed in the direction of the arrow. During the exposure of the carrier 4, the exported part is walking between the rollers 7 and B. During the movement of the carrier 4, the reflected light image of the document 3 is transferred to the surface of the carrier 4 to create a latent electrostatic image in the exposure unit 12. The electrostatic image then passes through the manifestation unit 13 in which the developing device 14 is installed. The developing device 14 provides for the development of the electrostatic image by means of brushes 15. The developed electrostatic image is transmitted by the carrier 4 to the transfer unit 16, in which the sheet the transfer paper is moved between the transfer roller and the carrier at a speed equal to the speed of the moving belt 5 to ensure the transfer of the generated image only by applying an electric displacement per roll to transfer In the transfer unit 16, a paper feeder 17 is installed for feeding paper from the magazine 18 with a paper supply to the developed image on the carrier 4. After removing the sheet from the carrier 4, it is transferred to the image fixing unit 19, in which the developed The xerographic image finally fixes the powder, after which the copy goes out of the apparatus into the place for laying. Inside the apparatus, a discharge device 2O is installed with a light source, which consists of a casing 21, a base 22 and fluorescent lamps 23 and 24. The casing 21 has an upper wall 25, side walls 26 and 27 and outer walls 28 and 29. Inside the casing 21 there is an intermediate DZ wall forming chambers 31 and 32 in which fluorescent lamps 23 and 24 are placed. 0 Top wall 25 has pairs of connecting slots 33 and 34 through which ultraviolet radiation passes pamp 23 and 24. Discharge device 2 O contains locks 35 for installing it inside the machine. Each of the fluorescent lamps 23 and 24 is equipped with a control circuit, and each of these circuits receives a signal from a microswitch installed on the paper feeder 17. In the mode, for example, when the maximum paper size from the magazine 18 corresponds to the size of the document to be copied, none control circuits associated with the respective fluorescent lamps are not included. If the microswitch signals that the paper in the magazine is smaller than the maximum specified magazine size, then a suitable control system is activated, whereby the appropriate fluorescent lamp is ignited to continuously expose the side portions of the photoconductive surface (t. that is, the cylindrical surfaces of the roller 8) of the corresponding area defined by the width of a pair of slots through which the light passes. In the absence of such exposure, the developer particles adhere to the ™ ™ photoconductive surface. Because in this case not. there are surfaces that receive images. with sufficient dimensions in the transfer unit 16, some of the particles of the particles stick to the transfer roller, which further requires cleaning, while the rest of the particles of particles adhering to the carrier are removed with a brush Zo. Claims of the Invention Electrophotographic copying machine comprising an electrophotographic carrier, charging, exposing, developing, transferring, image sticking units, a discharge device with a light source and a paper feeding device, characterized in that, in order to improve the quality of copies by neutralizing the charge Dovs on non-exposed side portions of an electrophotographic carrier in a dependent 59О268О6
    Ty from the format of the paper used, the sources of information,
    contains a microperforator, connected-taken into account during the examination
    with a bit device) and set-1. Copyright certificate SSHR
    Lenny on the paper feeding device. № 421213. кп. G OZ G 15 / OO, 1968.
SU721870826A 1971-12-30 1972-12-29 Electrophotographic printer SU902680A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00214244A US3809472A (en) 1971-12-30 1971-12-30 Pre-development exposure assembly

Publications (1)

Publication Number Publication Date
SU902680A3 true SU902680A3 (en) 1982-01-30

Family

ID=22798337

Family Applications (1)

Application Number Title Priority Date Filing Date
SU721870826A SU902680A3 (en) 1971-12-30 1972-12-29 Electrophotographic printer

Country Status (21)

Country Link
US (1) US3809472A (en)
JP (1) JPS5756072B2 (en)
AR (1) AR196103A1 (en)
AU (1) AU466757B2 (en)
BE (1) BE793559A (en)
BR (1) BR7208623D0 (en)
CA (1) CA1025513A (en)
CH (1) CH552841A (en)
CS (1) CS175444B2 (en)
DD (1) DD102825A5 (en)
DE (1) DE2260555B2 (en)
DK (1) DK134831B (en)
ES (1) ES410172A1 (en)
FR (1) FR2167109A5 (en)
GB (1) GB1415170A (en)
IL (1) IL41129A (en)
IT (1) IT973319B (en)
NL (1) NL7217766A (en)
SE (1) SE375388B (en)
SU (1) SU902680A3 (en)
ZA (1) ZA7209132B (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997259A (en) * 1973-11-08 1976-12-14 Xerox Corporation Apparatus for reducing image background in electrostatic reproduction machines
US3834807A (en) * 1974-02-14 1974-09-10 Ibm Copier with leading edge image control
JPS5444595Y2 (en) * 1974-04-29 1979-12-21
JPS51147443U (en) * 1975-05-21 1976-11-26
US4046471A (en) * 1975-11-03 1977-09-06 International Business Machines Corporation Dual mode electrophotographic apparatus having dual function printing beam
IT1055822B (en) * 1976-01-20 1982-01-11 Olivetti E C Spa Electrophotographic copying machine
JPS52155553U (en) * 1976-05-20 1977-11-25
JPS52155552U (en) * 1976-05-20 1977-11-25
JPS563715Y2 (en) * 1976-07-13 1981-01-27
JPS53119943U (en) * 1977-03-01 1978-09-25
JPS6236216B2 (en) * 1977-04-19 1987-08-06 Mita Industrial Co Ltd
JPS6211347B2 (en) * 1978-01-07 1987-03-12 Ricoh Kk
US4272204A (en) * 1978-12-21 1981-06-09 International Business Machines Corporation Automatic margin determining apparatus for a scanned sheet of paper
US4265556A (en) * 1978-12-21 1981-05-05 International Business Machines Corporation Apparatus for setting proportional margins based upon the width of a scanned sheet of paper
US4255042A (en) * 1979-03-26 1981-03-10 International Business Machines Corporation Light pipe for accurate erasure of photoconductor charge
JPS5674259A (en) * 1979-11-22 1981-06-19 Olympus Optical Co Ltd Electrophotographic apparatus
US4279504A (en) * 1979-12-26 1981-07-21 International Business Machines Corporation Copier and multifunction paper cassette
US4431301A (en) * 1980-03-12 1984-02-14 Tokyo Shibaura Denki Kabushiki Kaisha Electrostatic copying apparatus with means for preventing contamination of reverse side of copying medium
JPH0431110B2 (en) * 1983-12-28 1992-05-25
US4611906A (en) * 1985-01-22 1986-09-16 Sanyo Electric Co., Ltd. Electrophotographic copying apparatus
NL8502186A (en) * 1985-08-05 1987-03-02 Oce Nederland Bv Copier equipped with adjustable framers.
US4745438A (en) * 1986-09-16 1988-05-17 Xerox Corporation Automatic copier show-around erase system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927516A (en) * 1955-12-21 1960-03-08 Ibm Record card controlled electro-graphic printer
US3122455A (en) * 1960-12-30 1964-02-25 Xerox Corp Xerographic toner dispenser
GB1181214A (en) * 1966-04-07 1970-02-11 Charles William Clark Photographic Machines
GB1248945A (en) * 1967-12-26 1971-10-06 Rank Xerox Ltd Electrophotography
US3685894A (en) * 1968-01-22 1972-08-22 Addressograph Multigraph Photoelectrostatic copying machine having lamps for exposing copy margins
US3556655A (en) * 1968-01-22 1971-01-19 Addressograph Multigraph Photoelectrostatic copying machine
US3578970A (en) * 1968-05-03 1971-05-18 Plastic Coating Corp Variable width corona discharge apparatus with means to shield or vary a predetermined length of a corona discharge wire
US3612682A (en) * 1968-06-07 1971-10-12 Addressograph Multigraph Copier-duplicator machine providing for photoelectrostatic master from which copies are made
BE748854A (en) * 1969-04-16 1970-09-16 Fuji Photo Film Co Ltd Electrophotographic camera
JPS5018394B1 (en) * 1970-01-10 1975-06-28
US3671121A (en) * 1970-08-05 1972-06-20 Eastman Kodak Co Exposure device for controlling charge on a portion of a charged surface bordering an image frame projected on the charged surface
JPS4943337B1 (en) * 1970-09-03 1974-11-20
US3724940A (en) * 1970-12-07 1973-04-03 Ricoh Kk Electrophotographic copying apparatus with means for erasing marginal images
US3888644A (en) * 1973-12-03 1975-06-10 Black Sivalls & Bryson Inc Filter-separator apparatus

Also Published As

Publication number Publication date
FR2167109A5 (en) 1973-08-17
ZA7209132B (en) 1973-10-31
DE2260555A1 (en) 1973-07-05
BE793559A1 (en)
GB1415170A (en) 1975-11-26
JPS5756072B2 (en) 1982-11-27
IL41129A (en) 1977-01-31
US3809472A (en) 1974-05-07
CH552841A (en) 1974-08-15
DD102825A5 (en) 1973-12-20
CA1025513A (en) 1978-01-31
ES410172A1 (en) 1976-01-01
AU466757B2 (en) 1974-07-04
NL7217766A (en) 1973-07-03
AR196103A1 (en) 1973-11-30
JPS4878940A (en) 1973-10-23
IL41129D0 (en) 1973-02-28
BE793559A (en) 1973-06-29
CS175444B2 (en) 1977-05-31
BR7208623D0 (en) 1973-09-13
IT973319B (en) 1974-06-10
CA1025513A1 (en)
SE375388B (en) 1975-04-14
DE2260555B2 (en) 1978-12-14
AU5058572A (en) 1974-07-04
DK134831B (en) 1977-01-24

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