USRE33633E - Method and device for charging or discharging a member - Google Patents

Method and device for charging or discharging a member Download PDF

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Publication number
USRE33633E
USRE33633E US07/342,693 US34269389A USRE33633E US RE33633 E USRE33633 E US RE33633E US 34269389 A US34269389 A US 34269389A US RE33633 E USRE33633 E US RE33633E
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US
United States
Prior art keywords
electrode
discharging
inducing
dielectric member
acted
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
US07/342,693
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English (en)
Inventor
Nagao Hosono
Yukio Nagase
Tatsuo Takeuchi
Hidemi Egami
Hiroshi Satomura
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.)
Canon Inc
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Canon Inc
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Publication date
Priority claimed from JP5770684A external-priority patent/JPS60201368A/ja
Priority claimed from JP11450184A external-priority patent/JPS60258569A/ja
Application filed by Canon Inc filed Critical Canon Inc
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Publication of USRE33633E publication Critical patent/USRE33633E/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/06—Eliminating residual charges from a reusable imaging member
    • 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T19/00—Devices providing for corona discharge

Definitions

  • This invention relates to a method of electrically charging or discharging a member and a discharging device using the same, which are usable with an electrostatic recording process, an electrophotography process and the like.
  • corona chargers and dischargers are known and widely used, in which a high voltage is applied to a fine wire of a diameter 0.1 mm, for example, to produce corona discharge.
  • they involve a drawback that the wire is easily broken because it is thin.
  • the wire is easily stained or dusted, which results in non-uniform corona production, and therefore, non-uniform charging or discharging of a member to be charged or discharged.
  • a conductive shield which encloses the corona wire has to be remote therefrom by a certain distance, so that there is a limitation in reducing the size of the device.
  • the present invention is intended to further improve the discharging device of this type.
  • a device for charging or discharging a member comprising, a dielectric member, an inducing electrode and a discharging electrode sandwiching the dielectric member, and a power source for applying an alternating voltage between the inducing electrode and the discharging electrode to produce a surface discharge on a surface of the dielectric member at the discharging electrode side, wherein a charge density of the surface discharge area is changed in the direction of width of the discharging electrode, and abrupt charging operation can be avoided.
  • FIG. 1 shows a discharging device according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of a discharging member used with the discharging device shown in FIG. 1.
  • FIG. 3A shows a state of surface discharge when the present invention is not used.
  • FIGS. 3B and 3C show states of surface discharge in the charging or discharging method and in the discharging device according to an embodiment of the present invention.
  • FIG. 4 shows a relation between a peak-to-peak value of an alternating voltage applied to the discharging device.
  • FIG. 5 shows a discharging device according to another embodiment of the present invention.
  • FIG. 6A is a perspective view of a discharging member used with the discharging device shown in FIG. 5.
  • FIGS. 6B, 6C and 6D show examples of electrically connecting plural rows of discharging electrodes.
  • FIG. 7A shows a state of a surface discharge in the discharging device of FIGS. 5 and 6.
  • FIG. 7B shows a state wherein the surface discharge area is totally uniform along the longitudinal direction.
  • FIG. 7C shows a state of a surface discharge when the surface discharge is not sufficient.
  • FIG. 8 shows another embodiment of the present invention.
  • FIG. 1 there is shown a discharging device according to the present invention, which includes a discharging member 1 opposed to a member 2 to be charged or discharged (hereinafter simply called a member to be charged).
  • the discharging member 1 comprises a dielectric member 3, an inducing electrode 4 and a discharging electrode 5.
  • FIG. 2 is a perspective view of the the discharging member 1.
  • the discharging electrode 5 is a single linear elongate member disposed so as to extend parallel to the center of the inducing electrode 4.
  • the member 2 to be charged which is moved in the direction of the arrow relative to the discharging device 1, comprises a conductive base member 2a and an insulating or photoconductive member 2b. Between the conductive layer 2a and the discharging electrode 5, a bias voltage is applied by bias voltage applying means 7.
  • a relatively high hardness material such as ceramics, mica, glass or the like, or a flexible organic high polymer, such as polyimide resin, ethylene tetrafluoride, polyester, aclylic material vinyl chloride polyethylene or the like, may be used.
  • FIGS. 3A and 3B show states of surface discharge at the discharging electrode 5, as seen from the side of the discharging electrode 5, when the alternating voltage is applied between the inducing electrode 4 and the discharging electrode 5 of the discharging device 1 shown in FIGS. 1 and 2.
  • the inducing electrode 4 contacted to the backside of the dielectric member 3 is shown by phantom lines.
  • the width thereof is designated by L.
  • the hatched area is the area in which the surface discharge occurs along the surface of the dielectric member 3 at the both sides of the discharging electrode 5.
  • FIG. 3A shows the state of the surface discharge when the present invention is not used.
  • the surface discharge area 10 extends from both lateral sides of the discharging electrode 5, and the width 1 thereof is not even along the length of the discharging electrode 5. Therefore, when the member 2 to be charged is opposed to the discharging electrode 5 and moved relative thereto as shown in FIG. 1 to charge the insulating or photoconductive layer 2a, the surface thereof is not uniformly charged, that is, the surface potential distribution is non-uniform in the longitudinal direction, because of the above-described non-uniformness.
  • the width 1 of the surface discharge area 10 changes with the peak-to-peak value of the alternating voltage applied between the inducing electrode 4 and the discharging electrode 5.
  • FIG. 4 shows this, the peak-to-peak value vs the width of the surface discharge area 10.
  • the surface discharge starts at the a particular peak-to-peak voltage. With the increase of the peak-to-peak value, the surface discharge area width increases and finally saturates.
  • the surface discharge area width when saturated, is substantially equal to the width L of the inducing electrode 4, that is, the surface discharge area extends substantially as far as the lateral ends of the inducing electrode 4. It does not extend beyond the lateral ends even if the peak-to-peak value is further increased.
  • the used dielectric member 3 was of alumina ceramics having the thickness of 200 microns, and the discharging electrode 3 and the inducing electrode 4 were 500 microns wide and 6.5 mm wide, respectively.
  • the present invention utilizes this to provide a substantially uniform charging of the member 2 to be charged over the entire length of the discharging device 1, independently of the non-uniformness of the dielectric member 3 material and/or the score of the electrodes and others.
  • FIG. 3B shows the present invention.
  • the discharging electrode 5 is parallel with the center line of inducing electrode 4, but displaced toward one of the lateral ends of inducing electrode 4 (in this Figure, toward the upper end). Therefore, the distance from the discharging electrode 5 is smaller to said one of the lateral ends than to the other end, of the inducing electrode 4 (the lower end). Because of this displacement, the upper boundary 12 of surface discharge area 10 comes closer to the upper lateral end of inducing electrode 4, but it saturates at the upper lateral end, and it does not extend beyond the lateral end, as will be understood from the explanation with FIG. 4.
  • the upper boundary of surface discharge area 10 is substantially rectilinear over the entire length of the discharging member 1, and the ion density within the upper part of the surface discharge area is uniform over the length thereof.
  • the lower boundary of surface discharge area 10 remains non-uniform.
  • the influence of the non-uniformness at the lower part is reduced by the uniform discharging area of the upper part, so that a substantially uniform charging can be effected.
  • This arrangement corresponds to displacing the discharging electrode 5 rightwardly in FIG. 1 from the center of the inducing electrode 4.
  • the upper surface discharge area has a higher charge density than the lower part. Therefore, when member 2 is moved in the direction described above, the member 2 is subjected, during the first half, to relatively weak charging operation and is then subjected, during the last half, to relatively strong charging operation with the high charge density surface discharge area so as to be charged to a desired level.
  • a photosenitive member for example, should not abruptly be charged up to a high level, since then the service life thereof is shortened, or a pin hole can be formed therein. This is well-known.
  • the present invention is highly advantageous for the purpose of such use, since the first half of the charging operation is with the weaker charging powder, and the last half can be sufficiently strong to charge it up to the desired level within a limited period of time.
  • the lower boundary 13 of the surface discharge area 10 can be extended to the lower lateral end of inducing electrode 4 by raising the peak-to-peak value of the alternating voltage applied between the inducing electrode 4 and the discharging electrode 5. With the increase of the peak-to-peak value, the lower boundary 13 of the surface discharge area expands toward the lower lateral end of inducing electrode 4 and finally saturates. The lower boundary 13, when saturated, reaches substantially to the lower lateral end of the inducing electrode 4. It does not expand beyond the lateral end even if the peak-to-peak value is further increased.
  • the present invention utilizes this to make uniform the surface discharge area width over the entire length of the discharging device 1, independently of the non-uniformness of the dielectric member 3 material and/or the score of the electrodes and others. Additionally, rapid or sudden charging can be avoided.
  • FIG. 3C shows the surface discharge 10 of the discharging device of the present invention using this phenomenon.
  • the peak-to-peak value of the alternating voltage is so selected as to extend both of the lateral ends of the surface discharge area substantially to the respective lateral ends of the inducing electrode 4 over the entire length of the discharging device 1.
  • the width of the surface discharge area 10 is substantially equal to the width of the inducing electrode 4 and therefore uniform. Since the applied voltage is alternating, the width, very strictly speaking, changes at a high frequency, but the maximum width is substantially equal to the width of the inducing electrode 4 and is uniform.
  • the member 2 to be charged is subjected to the charging operation in the manner shown in FIG. 1 with the above described discharger, the member 2 to be charged is further uniformly charged.
  • the surface discharge area 10 does not extend beyond the width L of the inducing electrode 4, even if the voltage is increased.
  • the only change is the increase of the charge density in the surface discharge area 10.
  • the charge densities within the upper and lower surface discharge areas are respectively uniform in the longitudinal direction. Since the charge density at the upper surface discharge area is higher than that of the lower discharge area, abrupt charging operation can be avoided similarly to FIG. 3B embodiment.
  • the small size discharger is improved in its non-uniformness of the charging. And, without the necessity of use of a special control means, the member to be charged or discharged can be firstly acted on weakly and then acted on strongly up to a desired level.
  • the dielectric member 3 of alumina ceramics having the thickness of 200 microns was sandwiched by the discharging electrode 5 having the width of 500 microns and the inducing electrode 4 having the width of 4 mm.
  • the discharging electrode 5 was displaced by 1 mm toward one of lateral ends (upper end in FIG. 3B) of the inducing electrode 4, from the center thereof.
  • an alternating voltage having the peak-to-peak value of 2 KVpp was applied.
  • the surface discharge area did not extend to the lateral ends of the inducing electrode 4.
  • the alternating voltage was increased up to 3 KVpp to extend the upper end of the surface discharage area 10 substantially to the upper lateral end of the inducing electrode 4, and the charging was carried out under the same conditions.
  • the measured non-uniformity was plus and minus 4.5%.
  • the alternating voltage is raised up to 5 KVpp to extend both lateral ends of the surface discharge area to the respective lateral ends of the inducing electrode over the entire length.
  • the measured non-uniformity was plus and minus 3%.
  • the non-uniformity of charging can be reduced as described above, and in addition, the abrupt charging can be avoided.
  • FIGS. 5 and 6A show a discharging device according to another embodiment of the present invention.
  • FIG. 6A is a perspective view of the discharging member 1. Since this embodiment is similar to the embodiment described with FIGS. 1 and 2, except that the discharging electrode 5 is comprised of plural rows of discharging electrode members disposed at the intervals which will be described in detail hereinafter, and that the width of the inducing electrode 4 is correspondingly larger, the detailed description of the similar parts is ommited for the sake of simplicity by assigning the same reference numerals to the elements having the corresponding functions.
  • FIG. 7A shows the embodiment but it has four discharging electrode member 5a, 5b, 5c and 5d.
  • the topmost discharging electrode member 5a and the bottommost discharging electrode member 5d are so disposed that the distance L0 between the topmost discharging electrode member 5a and the upper lateral end of inducing electrode 4 is smaller than the distance L4 between the bottommost discharging electrode member 5 and the lower end of inducing electrode 4.
  • the upper boundary 12 of the surface discharge area 10a of the topmost electrode member 5a reaches substantially to the upper lateral ends of the inducing electrode 4. Therefore, the upper boundary 12 of the surface discharge area 10a is substantially rectilinear along the discharging member 1. And, the ion density within this area is uniform along the length thereof. However, because of the above-described dimensional conditions, the lower boundary 13 of the surface discharge area 10d is not uniform.
  • the distance L1, L2 and L3 between adjacent electrode members increase toward the lower part in FIG. 7A, that is, L1 ⁇ L2 ⁇ L3 . . . Ln. Further, it is preferable that the distance L0 between the upper lateral end of the inducing electrode and the topmost discharging electrode member 5a is smaller than one half of the distance L1 between the topmost electrode member 5a and the adjacent electrode member 5b, and that the distance L4 between the lower lateral end of the inducing electrode 4 and the bottommost discharging electrode member 5a is larger than one half of the distance L3 between the bottommost electrode member 5d and the adjacent electrode member 5c, namely, L0 ⁇ (1/2)L1, and L4>(1/2)L3.
  • the lower boundary of the surface discharge 10a is partially contacted or superposed with the upper part of the surface discharge area extending from the discharge electrode member 5b. However, they are apart at some portions so that they are generally non-uniform. Between the electrode members 5b and 5c, and between the electrode member 5c and 5d, the surface discharge areas are spaced further apart.
  • the upper boundary 12 of the surface discharge area 10a is substantially coincident with the upper lateral end of the inducing electrode 4 and is substantially rectilinear, and the ion density is uniform along the length of the discharging member 1, whereby, if the member 2 to be charged is opposed to the discharging member 1 and is moved relative thereto so as to first be subjected to the lower surface discharge area 10d of the discharging member 1 and then to the upper surface discharge area 10c, 10b and 10a in this order, the influence of the nonuniformity of the surface discharge area is removed by this final surface discharge area 10a, so that a substantially uniform charging is provided.
  • the charge density in the surface discharge area 10a is higher than that of the lower surface discharge areas, which gradually decreases toward the lower part in the Figure. Therefore, when the member 2 to be charged is moved in the above-described direction, it is first subjected to a relatively weak charging with the lower charge density, and the charging power is gradually increased until it is charged to a desired level by the highest charge density surface discharge area.
  • the plural rows of electrode members may be electrically connected in the fashion of a comb as shown in FIG. 6B; connected at opposite ends as shown in FIG. 6C; or connected in a zig-zag fashion as shown in FIG. 6D.
  • the intervals between adjacent ones are preferably monotonously decreased as described above. However, when the number thereof is large, it is not necessary that they decrease monotonously in the strict sense, if they are generally decreasing.
  • the width of the surface discharge area extending from each of the discharging electrode members increases, until the surface discharge occurs over the entire width of the inducing electrode 4.
  • FIG. 7B shows such a state.
  • the peak-to-peak voltage of the alternating voltage is such that both sides of the surface discharge area are substantially coincident of the respective lateral ends of the inducing electrode 4, and such that there is no missing part of the surface discharge between the electrode members 5a, 5b, 5c and 5d.
  • both of the lateral sides of the entire surface discharge area extend substantially to the respective lateral sides of the inducing electrode 4 so that the surface discharge area is totally uniform along the longitudinal direction.
  • the member 2 to be charged is subjected to the charging operation in the manner shown in FIG. 1 with the above described discharger, the member 2 to be charged is further uniformly charged.
  • the surface discharge area does not extend beyond the width L of the inducing electrode 4, even if the voltage is increased.
  • the only change is the increase of the charge density in the surface discharge area 10.
  • the charge density is uniform along the length of the entire discharging member 1 at a given position in width direction. Additionally, the charge density gradually increases from one lateral end to another lateral end, so that it is advantageous when used with an electrophotography process since abrupt charging can be avoided, as in the case of FIG. 3B.
  • the surface discharge area width is determined by the peak-to-peak value of the alternating voltage. Therefore, in order to increase the width of the surface discharge area, it is necessary to raise the voltage to a relatively great extent. Where, however, a plurality of electrode members are used, the width can be increased without the necessity of raising the voltage to such an extent. The width can be increased as desired by increasing the number of the electrode members, thus remarkably enhancing the charging or discharging efficiency. Further, by changing the intervals between the electrode members, the charge density distribution can be changed.
  • FIG. 7C illustrates the state of the surface discharge which is different from those described above.
  • the surface discharge areas 10a, 10b, 10c and 10d extend from the respective discharge electrode members 5a, 5b, 5c and 5d, and the width of each of them is non-uniform along the length. So, if the member 2 to be charged is moved as shown in FIG. 1 to charge the surface of the insulating or photoconductive layer 2b, the distribution of the resultant charging is not uniform along the length of the discharging member 1 as in FIG. 3A.
  • the dielectric member 3 of alumina ceramics having the thickness of 200 microns was sandwiched by the inducing electrode 4 having the width of 16 mm and four discharging electrode members 5a, 5b, 5c and 5d spaced by 1 mm(L0), 3 mm(L1), 4 mm (L2), 5 mm (L3) and 3 mm (L4), respectively, and each having the width of 500 microns.
  • an alternating voltage having the peak-to-peak value of 2 KVpp was applied.
  • the surface discharge area did not extend to the lateral ends of the inducing electrode 4, as in FIG. 7C.
  • the alternating voltage was increased up to 3 KVpp to extend at least the surface discharage area 10a of the topmost electrode member 5a substantially to the upper lateral end of the inducing electrode 4, and the charging was carried out under the same conditions.
  • the measured non-uniformness was plus and minus 4%.
  • the alternating voltage is raised up to 5 KVpp to extend the surface discharge areas to cover the entire area corresponding to the inducing electrode 4.
  • the measured non-uniformness was plus and minus 2.5%.
  • the non-uniformness of charging can be reduced as described above, and in addition, the abrupt charging can be avoided.
  • the thickness of the dielectric member 3 may be changed in the direction of the width as shown in FIG. 8.
  • the electric field around the discharging electrode 5 is stronger with the decrease of the dielectric member 3 thickness, the surface discharge area extends more to the thin dielectric member side.
  • the discharging electrode 5 may be comprised by plural rows of discharging electrode members. In this embodiment, the thickness charges continuously, but it may be changed stepwisely.
  • the voltage applied thereto may be changed gradually.
  • the member to be charged or discharged can be first charged with a weak charging power and then charged with an increasing charging power without the necessity of using a special control means, and in addition the substantially uniform charging can be achieved in the small-sized discharging device.
  • surface discharge area width 1 is dependent on the material, dielectric constant and the surface resistivity of the dielectric member 3, but person with ordinary skill in the art can determine the peak-to-peak value in accordance with those factors without difficulty.
  • the width varies in dependence on the ambient conditions, such as atmospheric pressure, temperature, humidity and the degree of stain of the dielectric member 3 surface.
  • the peak-to-peak value can be so determined, based on the actual conditions under which the device is used, that the surface discharge area 10 extends substantially to the lateral ends of the inducing electrode 4, and such determination is desirable.
  • the alternating voltage is not limited to a usual AC voltage, and may be rectangular wave voltage or pulse alternating voltage.
  • the voltage source 7, when used, may supply a DC voltage or pulsating voltage if the ions generated near the discharging electrode 5 can be directed to the member to be charged or discharged.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Elimination Of Static Electricity (AREA)
US07/342,693 1984-03-26 1989-04-24 Method and device for charging or discharging a member Expired - Lifetime USRE33633E (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP59-57706 1984-03-26
JP5770684A JPS60201368A (ja) 1984-03-26 1984-03-26 除・帯電方法
JP11450184A JPS60258569A (ja) 1984-06-06 1984-06-06 除・帯電方法および放電装置
JP59-114501 1984-06-06

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US06/618,248 Reissue US4589053A (en) 1984-06-07 1984-06-07 Method and device for charging or discharging a member
US07193731 Continuation 1988-05-13

Publications (1)

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USRE33633E true USRE33633E (en) 1991-07-09

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US07/342,693 Expired - Lifetime USRE33633E (en) 1984-03-26 1989-04-24 Method and device for charging or discharging a member

Country Status (4)

Country Link
US (1) USRE33633E (enrdf_load_stackoverflow)
DE (1) DE3422400A1 (enrdf_load_stackoverflow)
FR (1) FR2561830B1 (enrdf_load_stackoverflow)
GB (1) GB2156598B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293200A (en) * 1992-02-18 1994-03-08 Brother Kogyo Kabushiki Kaisha Electrostatic device for charging a photosensitive surface
US5407639A (en) * 1991-10-14 1995-04-18 Toto, Ltd. Method of manufacturing a corona discharge device
US5615933A (en) * 1995-05-31 1997-04-01 General Motors Corporation Electric vehicle with regenerative and anti-lock braking
US20040091292A1 (en) * 2002-08-22 2004-05-13 Canon Kabushiki Kaisha Image forming apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69031133T2 (de) * 1989-05-31 1997-11-20 Canon Kk Bilderzeugungsgerät

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US3811048A (en) * 1972-09-12 1974-05-14 Xerox Corp Electrophotographic charging apparatus
US3813547A (en) * 1971-01-21 1974-05-28 Xerox Corp Corona generating apparatus
US4057723A (en) * 1976-01-23 1977-11-08 Xerox Corporation Compact corona charging device
US4110614A (en) * 1976-12-17 1978-08-29 Xerox Corporation Corona device
EP0000789A2 (en) * 1977-08-12 1979-02-21 Dennison Manufacturing Company Method and apparatus for generating charged particles
GB2012493A (en) * 1977-09-05 1979-07-25 Masuda S Device for electrically charging particles
GB2079067A (en) * 1977-10-25 1982-01-13 Dennison Mfg Co Apparatus and method for generating ions
WO1982000723A1 (en) * 1980-08-21 1982-03-04 Mfg Co Dennison Electrostatic printing and copying
JPS57205757A (en) * 1981-06-15 1982-12-16 Fuji Xerox Co Ltd Electrostatic charger
WO1983000751A1 (en) * 1981-08-24 1983-03-03 Dennison Mfg Co Thermally regulated ion generation
JPS5848074A (ja) * 1981-09-17 1983-03-19 Fuji Xerox Co Ltd 電子複写機の平型放電装置
JPS5848073A (ja) * 1981-09-17 1983-03-19 Fuji Xerox Co Ltd 電子複写機の平型放電装置
JPS58108559A (ja) * 1981-12-23 1983-06-28 Fuji Xerox Co Ltd 電子複写機等の帯電装置
EP0102569A2 (en) * 1982-09-07 1984-03-14 Senichi Masuda Electric corona discharge device, method for making said device and electrostatic treatment apparatus comprising said device

Patent Citations (16)

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Publication number Priority date Publication date Assignee Title
GB1039681A (en) * 1962-02-09 1966-08-17 Bauknecht Gmbh G Method of and apparatus for providing electrical air conditioning
US3813547A (en) * 1971-01-21 1974-05-28 Xerox Corp Corona generating apparatus
US3811048A (en) * 1972-09-12 1974-05-14 Xerox Corp Electrophotographic charging apparatus
US4057723A (en) * 1976-01-23 1977-11-08 Xerox Corporation Compact corona charging device
US4110614A (en) * 1976-12-17 1978-08-29 Xerox Corporation Corona device
EP0000789A2 (en) * 1977-08-12 1979-02-21 Dennison Manufacturing Company Method and apparatus for generating charged particles
US4155093A (en) * 1977-08-12 1979-05-15 Dennison Manufacturing Company Method and apparatus for generating charged particles
GB2012493A (en) * 1977-09-05 1979-07-25 Masuda S Device for electrically charging particles
GB2079067A (en) * 1977-10-25 1982-01-13 Dennison Mfg Co Apparatus and method for generating ions
WO1982000723A1 (en) * 1980-08-21 1982-03-04 Mfg Co Dennison Electrostatic printing and copying
JPS57205757A (en) * 1981-06-15 1982-12-16 Fuji Xerox Co Ltd Electrostatic charger
WO1983000751A1 (en) * 1981-08-24 1983-03-03 Dennison Mfg Co Thermally regulated ion generation
JPS5848074A (ja) * 1981-09-17 1983-03-19 Fuji Xerox Co Ltd 電子複写機の平型放電装置
JPS5848073A (ja) * 1981-09-17 1983-03-19 Fuji Xerox Co Ltd 電子複写機の平型放電装置
JPS58108559A (ja) * 1981-12-23 1983-06-28 Fuji Xerox Co Ltd 電子複写機等の帯電装置
EP0102569A2 (en) * 1982-09-07 1984-03-14 Senichi Masuda Electric corona discharge device, method for making said device and electrostatic treatment apparatus comprising said device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407639A (en) * 1991-10-14 1995-04-18 Toto, Ltd. Method of manufacturing a corona discharge device
US5293200A (en) * 1992-02-18 1994-03-08 Brother Kogyo Kabushiki Kaisha Electrostatic device for charging a photosensitive surface
US5615933A (en) * 1995-05-31 1997-04-01 General Motors Corporation Electric vehicle with regenerative and anti-lock braking
US20040091292A1 (en) * 2002-08-22 2004-05-13 Canon Kabushiki Kaisha Image forming apparatus
US6803932B2 (en) 2002-08-22 2004-10-12 Canon Kabushiki Kaisha Image forming apparatus

Also Published As

Publication number Publication date
DE3422400A1 (de) 1985-10-03
FR2561830A1 (fr) 1985-09-27
FR2561830B1 (fr) 1992-02-14
DE3422400C2 (enrdf_load_stackoverflow) 1988-12-29
GB8415279D0 (en) 1984-07-18
GB2156598A (en) 1985-10-09
GB2156598B (en) 1988-03-02

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