US3919605A - Corona discharge apparatus - Google Patents
Corona discharge apparatus Download PDFInfo
- Publication number
- US3919605A US3919605A US469489A US46948974A US3919605A US 3919605 A US3919605 A US 3919605A US 469489 A US469489 A US 469489A US 46948974 A US46948974 A US 46948974A US 3919605 A US3919605 A US 3919605A
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- US
- United States
- Prior art keywords
- rail
- supporting
- corona discharge
- plate spring
- shield
- 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
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-
- 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
Definitions
- a corona discharge device has an arrangement for easily varying the distance between the device and a photoreceptor surface, the arrangement including a plate spring for biasing the device in one direction. and a screw for moving the device against the bias of the plate spring.
- a supporting rail on which the corona discharge device is slidably mounted is held between flanges on the plate spring.
- the principal section of a corona discharge apparatus is a discharger proper that is assigned a function of conducting proper discharge by arranging insulation blocks at the both ends in a slender metal shield of a concave section, by bridging a fine electrode wire made of metal over the blocks, and by supplying the said fine electrode wire with high voltage, thus effectuating proper discharge.
- the present invention to put it in details, relates to a mechanism for adjusting the distance between a corona discharge apparatus employed for the electrification, the discharge, and the transcription of a photosensitive substance of the above-mentioned duplicator of the electronic photography system and the photosensitive substance.
- a discharger proper 1 with insulation blocks 3 (of which only one end is shown in the drawing) properly arranged at the both ends of an oblong metal shield 2 of a concave section, with a fine wire electrode 4-made of a metal properly set in place to bridge over between the said blocks, and with a groove 5 formed on the bottom thereof, is so designed as to slide along a supporting rail 6 of the said discharger proper 1 and the said groove 5 selected as the guides, andis so positioned as to be confronted with a drum 7 constituting a photosensitive substance over a certain distance a properly maintained therefor.
- the present invention aims to provide such a discharge apparatus as is capable of conducting discharge in a uniform manner and in the most suitable manner; therefore, it proves to be quite effective for obtaining a duplicate of a superb quality.
- a supporting base means forming a channel along the shield, 21 supporting rail confined within the channel for supporting the device on the base adjacent to the photosensitive surface, a plate spring disposed at each end of the rail, each plate spring being interposed between the base and the rail and adapted to bias the rail in a first direction, each of the plate springs having flange means thereon for confining the rail therebetween, and screw means for adjustably moving the rail to a desired position against the bias of each of the plate springs and retaining the rail in the desired position.
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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)
Abstract
A corona discharge device has an arrangement for easily varying the distance between the device and a photoreceptor surface, the arrangement including a plate spring for biasing the device in one direction, and a screw for moving the device against the bias of the plate spring. A supporting rail on which the corona discharge device is slidably mounted is held between flanges on the plate spring.
Description
United States Patent Honda CORONA DISCHARGE APPARATUS 75] Inventor: Ko Honda, Ebina, Japan 22] Filed: May 13, 1974 [21] Appl. No.: 469,489
[30] Foreign Application Priority Data Nov. 11, 1975 Primary E.\aminerL. T. Hix Attorney, Agent, or Firm.lames J. Ralabate; Bernard A. Chiama; Earl T. Reichert [5 7 ABSTRACT A corona discharge device has an arrangement for easily varying the distance between the device and a photoreceptor surface, the arrangement including a plate spring for biasing the device in one direction. and a screw for moving the device against the bias of the plate spring. A supporting rail on which the corona discharge device is slidably mounted is held between flanges on the plate spring.
1 Claim, 2 Drawing Figures May 18, 1973 Japan 48-057832 [U] [52] US. Cl 317/262 A [51] Int. CI.' G03G 15/02; HOlT 19/00 [58] Field of Search 317/4, 262 A [56] References Cited UNITED STATES PATENTS 3,8l 1,048 5/1974 Matsumoto et al 317/262 A U.S. Patent Nov. 11, 1975 CORONA DISCHARGE APPARATUS BACKGROUND OF THE INVENTION electrostatic charge, and thereafter the latent image is developed by the employment of a developing agent containing electrostatically suctioned corpuscles, then the image thus developed is either fixed as it is or transcribed on other image supporting substand and properly fixed.
It is required of a corona discharge apparatus that proper discharge be conducted in a uniform manner and free from excess or deficiency, since irregularity, excess or deficiency in discharge affects the quality of a duplicate a great deal. As a matter of fact, the irregularity, excess or deficiency in discharge has been given birth thus far by irregularity in the distance between a photosensitive substance and a discharger proper, which constitutes a reasonable and valid reason therefor. Now, here will be given a description ofthe outline of the construction of a corona discharge apparatus. The principal section of a corona discharge apparatus is a discharger proper that is assigned a function of conducting proper discharge by arranging insulation blocks at the both ends in a slender metal shield of a concave section, by bridging a fine electrode wire made of metal over the blocks, and by supplying the said fine electrode wire with high voltage, thus effectuating proper discharge.
In the case of setting the said discharger proper regularly in place in the interior of a duplicator, the conventional method generally followed used to be such that j a rail for supporting the discharger proper was arranged on a supporting base, for instance, on the frame of a duplicator or on brackets, and the discharge proper used to be caused to slide on the said rail by means of a groove formed on the bottom thereof as a guide therefor. The reasons why the siad supporting rail was thus used lied in that the discharger proper needed be dislocated off position frequently for the purpose of cleaning the said fine wire of the electrode or of repairing such when cut, and the same is applied to the present invention; however, in the conventional case, the
rail was arranged on the supporting base in a direct man er, and adjustment of the distance between a photosensitive substance and a discharger proper used to be effectuated by proper adjustment of the connection between the rail and the supporting base. This was a quite troublesome work, and especially in case the adjustment was conducted in the course of assembly and some irregularity was located by an inspection after the completion of a duplicator as a whole, many an hour used to be required for the readjustment thereof.
SUMMARY OF THE INVENTION The present invention, to put it in details, relates to a mechanism for adjusting the distance between a corona discharge apparatus employed for the electrification, the discharge, and the transcription of a photosensitive substance of the above-mentioned duplicator of the electronic photography system and the photosensitive substance.
BRIEF DESCRIPTION OF THE DRAWINGS DETAILED DESCRIPTION OF THE INVENTION A discharger proper 1, with insulation blocks 3 (of which only one end is shown in the drawing) properly arranged at the both ends of an oblong metal shield 2 of a concave section, with a fine wire electrode 4-made of a metal properly set in place to bridge over between the said blocks, and with a groove 5 formed on the bottom thereof, is so designed as to slide along a supporting rail 6 of the said discharger proper 1 and the said groove 5 selected as the guides, andis so positioned as to be confronted with a drum 7 constituting a photosensitive substance over a certain distance a properly maintained therefor. Though not shown in the drawing, such a method that a tup is formed'through the bottom of the supporting rail 6 and a set screw is inserted therein from the side of the supporting base 9 may well be followed for the purpose of effectuating peoper adjustment. To add up thereto, it is desirable that an adjusting mechanism comprising the plate spring 10, the set screw 11 and the supporting base 9 set forth above be arranged near the both ends of the supporting rail 6, i.e., at two spots, whereby the distance between the drum 7 and the discharger proper 1 can be properly adjusted so as to be constant at any point in the longitudinal direction. As can be seen, supporting rail 6 is held between flanges 12.
As elucidated above, the present invention aims to provide such a discharge apparatus as is capable of conducting discharge in a uniform manner and in the most suitable manner; therefore, it proves to be quite effective for obtaining a duplicate of a superb quality.
What is claimed is:
l. The combination of a corona discharge device having an elongated shield and. a corona wire mounted within and extending along the shield, with an improved apparatus for adjustably supporting the device adjacent to a photosensitive surface, the. improvement comprising:
a supporting base, means forming a channel along the shield, 21 supporting rail confined within the channel for supporting the device on the base adjacent to the photosensitive surface, a plate spring disposed at each end of the rail, each plate spring being interposed between the base and the rail and adapted to bias the rail in a first direction, each of the plate springs having flange means thereon for confining the rail therebetween, and screw means for adjustably moving the rail to a desired position against the bias of each of the plate springs and retaining the rail in the desired position.
Claims (1)
1. The combination of a corona discharge device having an elongated shield and a corona wire mounted within and extending along the shield, with an improved apparatus for adjustably supporting the device adjacent to a photosensitive surface, the improvement comprising: a supporting base, means forming a channel along the shield, a supporting rail confined within the channel for supporting the device on the base adjacent to the photosensitive surface, a plate spring disposed at each end of the rail, each plate spring being interposed between the base and the rail and adapted to bias the rail in a first direction, each of the plate springs having flange means thereon for confining the rail therebetween, and screw means for adjustably moving the rail to a desired position against the bias of each of the plate springs and retaining the rail in the desired position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1973057832U JPS507039U (en) | 1973-05-18 | 1973-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3919605A true US3919605A (en) | 1975-11-11 |
Family
ID=13066902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US469489A Expired - Lifetime US3919605A (en) | 1973-05-18 | 1974-05-13 | Corona discharge apparatus |
Country Status (2)
Country | Link |
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US (1) | US3919605A (en) |
JP (1) | JPS507039U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4252431A (en) * | 1979-10-01 | 1981-02-24 | Nashua Corporation | Adjustable corona support |
US5335050A (en) * | 1993-09-13 | 1994-08-02 | Xerox Corporation | Adjustable support assembly |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS623809Y2 (en) * | 1977-06-24 | 1987-01-28 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3811048A (en) * | 1972-09-12 | 1974-05-14 | Xerox Corp | Electrophotographic charging apparatus |
-
1973
- 1973-05-18 JP JP1973057832U patent/JPS507039U/ja active Pending
-
1974
- 1974-05-13 US US469489A patent/US3919605A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3811048A (en) * | 1972-09-12 | 1974-05-14 | Xerox Corp | Electrophotographic charging apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4252431A (en) * | 1979-10-01 | 1981-02-24 | Nashua Corporation | Adjustable corona support |
US5335050A (en) * | 1993-09-13 | 1994-08-02 | Xerox Corporation | Adjustable support assembly |
Also Published As
Publication number | Publication date |
---|---|
JPS507039U (en) | 1975-01-24 |
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