JPS6032078A - Rotary head type electrophotographic device - Google Patents

Abstract

PURPOSE:To simplify the structure of the titled device and to suppress the dark attenuation of charge by unifying charging, exposing and developing means, using a rotary type stylus electrode as the charging means and processing from charging to development for a short time. CONSTITUTION:When a rotary head 26 is rotated, the stylus electrode 32 moves on the surface of a photosensitive material 2 in its peripheral direction and a moving table 23 also moves on the surface of the photosensitive material 2 in the curved axis direction, so that the whole surface of the photosensitive material 2 is charged with corona. laser beams are irradiated from a laser beam irradiating system 33 rotated together with the stylus electrode 32 to the charge photosensitive material 2, surface charge is dispersed from the irradiated surface of the photosensitive material 2 and the surface charge of a part to which laser beams are not irradiated is left to form an electrostatic latent image. The electrostatic latent image Ge formed as mentioned above is immediately developed by a toner developing unit 27 moved together with the rotary head 26.

Description

Detailed Description of the Invention The present invention provides a rotating head type electrophotographic apparatus in which an electrode for charging the surface of an electrophotographic photoreceptor and an exposure source for exposing the charged electrophotographic photoreceptor are mounted on a rotating body. It is related to.

Conventionally, electrophotography involves charging the surface of an electrophotographic photoreceptor, exposing the entire image to light on the charged photoreceptor to form an electrostatic latent image, and developing the image by electrically attracting toner to the electrostatic latent image. is publicly known.

On the other hand, as shown in Japanese Patent Application Laid-Open No. 57-151933, for example, a rotating head is formed by mounting a recording light irradiation system that irradiates recording light outward on a rotating body, and
The recording material is fixed so as to face the surface of the rotary head, and the recording light emitted from the recording light irradiation system is applied to the recording material in two directions by rotating the rotary head and moving the head in the axial direction.
2. Description of the Related Art Recording apparatuses that record images on recording materials by scanning dimensionally have been considered.

A recording device that uses a rotating head that moves in the direction of the rotation axis as described above requires expensive equipment such as a rotating mirror, compared to a device that deflects and scans the recording light using an optical deflector such as a galvanometer mirror or a polygonal rotating mirror. is unnecessary and can be formed at low cost, and since the optical path from the condensing lens of the recording light irradiation system to the recording material 1 can be set short, high resolution and high brightness recording can be performed.
It has the advantage of This rotating head type recording device also has the advantage that it can be made smaller than a recording device that rotates a platen that supports recording material.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary head type electrophotographic apparatus in which recording, ie, exposure, is performed by a rotary head that has many advantages as described above.

The rotating head type electrophotographic apparatus of the present invention has a rotating head in which a corona charging electrode and an electrostatic latent f-image forming exposure source are fixed to a rotating body rotatably supported on a movable table, each facing outward. a platen having an electrophotographic photoreceptor supporting surface extending in the axial direction of the rotary head and curved so as to face the circumferential surface of the rotary head; a table feeding means for moving the movable table in the axial direction of the rotary body; and the platen. an electrophotographic processing unit supported on a movable table so as to be close to the electrophotographic photoreceptor supported by the electrophotographic photoreceptor; It consists of a light-shielding member that blocks external light from entering the photoreceptor.2 If a corona charging electrode is mounted on a rotating head that rotates and moves for image recording (exposure) scanning, , the surface of the electrophotographic photoreceptor supported so as to face the circumferential surface of the rotary head can be charged evenly. Therefore, a needle electrode is used as the charging electrode because it is sufficient to charge the device in a spot-like manner, and the charging mechanism has a very simple structure.

As other charging electrodes, a wire electrode or a round or stylus type electrode metal may be used on the rotating body instead of a needle electrode to achieve even and uniform charging.

In addition, since the charging electrode and the exposure source are both mounted on a rotating spatula, it is possible to perform charging and exposure almost in real time.Furthermore, the developing processing unit is supported on a movable table along with this rotating head, and exposed. Since development is carried out immediately after the development, dark decay of the charged charges is less likely to occur, and high-resolution, high-quality electrophotographs can be obtained.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a rotating head type electrophotographic apparatus according to an embodiment of the present invention.
In a system for making offset plates for printing, there is a sorted pattern on the left end of the plate-making device 1, which is used to form an image pattern on the surface of a sheet-like printing material. Material 2 is accumulated. This photosensitive material 2 is applied to the surface of an elastic sheet material such as an aluminum sheet.
It is made by forming a resin layer that becomes soluble in chemicals when exposed to ultraviolet 11fflk, and further forming an electrophotographic photosensitive layer on the surface, with the side with these layers facing up. and are accumulated at the above location.

A photosensitive material loading device 3 is provided above the photosensitive material 2 . The photosensitive material loading device 3 includes a pair of upper and lower rails 4 and 5 that are fixed to the main body of the plate making device 1 and extend parallel to each other, a slider 6° 7 that is movable along the rails 4 and 5, and a lower end portion. is hinged to the lower slider 7 and is indicated by arrow A in the figure.
a table swing mechanism 9 fixed to the upper slider 6 to support the upper end of the table 8 and swing the table 8 in the direction of arrow A';
, an upper cylinder 10 such as an air cylinder, and a center cylinder 11 fixed to the sensitive material conveying table 8 in pairs on the left and right sides.
, lower cylinder 12, these cylinders 10, 11.12
The endless wire 1 is supported at the tips of the piston rods 10a, IIT-, and 12a, respectively, and the endless wire 1 is supported by the suction cutters 13, 14, and 15, and the lower slider 7.
It consists of a table moving motor 17 that moves the photosensitive material conveyance teniple 8 along the rails 4 and 5 via the table 6. Rails 4 and 5 are located below the left end position in the figure of the sensing side conveyance table 8.
A pair of left and right conveyor bells) 2'0 (only one shown) which are driven to move along a pair of slide shafts 18 and 19 parallel to and rotate in the directions of arrows 1-3; A pair of left and right conveyor belts 21 (only one shown) is disposed on the downstream side of the belt 20 in the conveyance direction and is rotationally driven in the direction of arrow C.
is provided. Note that the suction cups 13, 14.
Reference numeral 15 is a device conventionally used for suction and holding of sheet materials, and is connected to the suction side of an air pump (not shown), and adsorbs A2 by air suction (this point will be explained in detail later). ).

Also, among these suction cups 13, 14, and 15, the suction cup 13 supported by the upper cylinder 10 and the suction cup 15 supported by the lower cylinder 12 are swingable at the tips of the piston rods 10a and 12a, respectively. Supported. .

A screw rod 22 is supported near the upper rail 4 and extends in a direction parallel to the rail 4, and the screw rod 22 has an upper portion of a moving table 23 screwed therein. The screw rod 22 is rotated by a sub-scanning low-speed motor 24 provided at the right end in the figure, and the threaded moving table 23 is rotated by the screw rod 22.
move it along.

That is, the screw rod 22 and the motor 24 constitute table feeding means 9 for moving the movable table 23 in the axial direction of the screw rod 22.

The movable table 23 includes a rotary head 26 that is rotated by a main scanning servo motor 25 around the center of a rotary shaft parallel to the screw rod 22, a toner developing unit 27, a rinsing unit 28, and an air knife 29. It is installed. At a position facing the circumferential surface of the rotary head 26, a rotary head 2 is placed concentrically with the rotary head 26.
Sensitive material support surface 30ai consisting of an arcuate surface extending in the axial direction of No. 6
A platen 30 is provided.

Fig. 2 shows in detail the machine*'i mounted on the moving table 23, and as shown in Fig. 2, there is no main body of the rotating head 26, and the peripheral surface 31a of the rotating body 31 is not affected by external force. One corona charging needle electrode 32 facing
A laser beam irradiation system 33 as an exposure source, which also faces the peripheral force, is fixed at a position closer to the developing unit 27 than 2.
consists of a semiconductor laser 34 that irradiates a laser beam toward the external force of the rotating body 31, and a condenser lens system 35.

The semiconductor laser 34 is driven by receiving a drive current modulated by a modulation signal carrying image information from a drive circuit 36, and the needle electrode 32 is connected to a DC power source 37.

The needle electrode 32 and the DC power supply 37, as well as the semiconductor laser 34 and the drive circuit 36, are electrically connected via, for example, a slip ring and a brush that slides on the slip ring.

The toner developing unit 27 includes a curved back plate 38 facing the photosensitive material supporting surface 30a of the platen 30, and a side edge plate 39 projecting in a frame shape from the periphery of the surface of the back plate 38 on the platen 30 side. Q) A toner liquid container 41 in which a toner liquid reservoir space 40 is defined, a toner liquid supply port 42 and a toner liquid outlet 43 provided at the upper and lower parts of the container 41, and a connection between the toner liquid supply port 42 and the toner liquid. A toner liquid passage 44 communicates with the outlet 43 outside the container 41 and is interposed in the toner liquid passage 44 to direct the toner liquid in the passage 44 to the toner liquid outlet 43.
Toner liquid circulation pump 4 that sends toner liquid from the toner liquid supply port 42 side
Consists of 5. , Furthermore, this toner developing unit' 27
rIt is shown in Fig. 3 for easy understanding.

The bath/storage unit 28 is structurally formed exactly the same as the toner developing unit 27 described above, and includes a rinse liquid container 49 in which a rinse liquid reservoir space 48 is defined by a back plate 46 and a side edge plate 47, and a rinse liquid supply. It consists of a port 50, a rinse liquid outlet 511, a rinse liquid outlet 52, and a rinse liquid circulation pump 53.

As shown in FIG. 2, the platen 30 has a large number of air suction holes 3 opened in the photosensitive material-supporting surface 30a on the front surface! , O
b are provided, and these air suction holes 30b are connected to the suction side of an air pump (not shown) via an air passage.

When the photosensitive material 2 is placed on the photosensitive material support surface 30a as described later, the photosensitive material 2 is firmly held on the photosensitive material support surface 30a by sucking air from the air suction hole 30b. be done.

The above-mentioned toner liquid %-4' I and rinse liquid container 49 are arranged so that the upper edge plates 39 and 47 of the toner liquid container 49 are placed in a small gap with respect to the photosensitive material 2 held on the photosensitive material support surface 30a. It's set in such a way that it's far away. Side edge plate 3 above the trench
9; On the surface of 47, the left and right sides of the side edge plate extend over the entire length in the vertical direction, and the lower part of the side edge plate is provided with a container 4.
1. '49 Extending toward the center side, a toner liquid outlet 43;
Narrow grooves 39a, 47a communicating with the rinse liquid outlet 51 are formed.

The air knife 29 is formed from a tube member that extends vertically along the photosensitive material supporting surface 30a of the platen 30. One end of the air knife 29 is connected to the discharge side of a blower (not shown) that discharges hot air, and the other end is closed. On the circumferential side of the portion of the air knife 29 facing the platen 30, there is a sulin extending over the entire length.
9''a is provided, and the hot air supplied by the above-mentioned blower is discharged from this slit 29a toward the photosensitive material supporting surface 30a.

As shown in FIG. 1, each of the mechanisms described above is covered with a light shielding member 54 so as not to receive external light. Also, from the stacking position of photosensitive material 2 to the conveyor bell) 20.21
A plate making unit 55 is arranged at a position separated by e. .

Next, the operation of the plate making apparatus 1 having the structure explained above will be explained. First, loading the photosensitive material 2 onto the platen 30 will be described. 1. The photosensitive material transporting table 8 of the photosensitive material loading device 3 is driven by a table moving motor 17, which moves the slider 6° 7.
is set at the left end position shown in FIG. 1, that is, the position in front of the stacked photosensitive materials 2. Next, the table swinging mechanism 9 is driven, and the photosensitive material conveying table 8 is swung in the downward direction of the arrow A around the hinged shaft with the slider 7, and stops at a position facing the photosensitive material 2 from above. be done. Under this condition, air suction by the suction cups 13, 14, and 15 is started, and the topmost photosensitive material 2 at the stacking position is suctioned and held by these suction cups 13, 14, and 15.

At this time, if the remaining number of photosensitive materials 2 is small and the stacking height is low, the cylinders 10, 11 . At '12', the piston rods 10a, lla, and 12a are operated to descend, respectively.
Suction cup 13, 14.15'! 5 may be made closer to photosensitive material 2. In this case, it is preferable to detect that the photosensitive material 2 at the most -F position has been lifted, and to
11. Stop the operation of 12 completely, or
Piston rods 10a and Ila according to the remaining number of piston rods.

The amount of extension of 12a is controlled. 1 sheet of sensitive material 2 suction cup 1
3.14.15, the table swing mechanism 9 is then driven in the opposite direction to the previous direction, and the photosensitive material transport table 8 is raised to the position shown in FIG. Only the pair of central cylinders 11 are now actuated to extend the piston rod lla. Therefore, when the photosensitive material 2 is adsorbed while standing diagonally, its center in the vertical direction is on the table 8.
curved away from the At this time, each pair of upper and lower suction cups 13.15 is connected to the piston rods 10a, 1
Shake your head at the tip of 2a to allow the entire curvature of the photosensitive material 2.

That is, the piston rod IOa swingably supports the suction cup 13.15 in this way.

A sheet material bending means for bending the sheet-like photosensitive material 2° is constituted by the tip end portion of the photosensitive material 12a and the central cylinder 11 that presses the central portion of the photosensitive material 2. The piston rod lla of the central cylinder 11 is extended until the photosensitive material 2 is curved with a larger curvature than the curvature of the photosensitive material support surface 30a of the platen 30.

When the photosensitive material 2 is bent as described above, the table moving motor 17 is driven, and the photosensitive material conveying table 8 is moved along the rails 4 and 5.
along the direction toward the platen 30. At this time, the moving table 23 moves to the first
The transport table 8 is set at the standby position on the right side of the figure.
does not impede movement. The table moving motor 17 is stopped when the table 8 is moved until the photosensitive material 2 is located at a predetermined left and right position with respect to the platen 30. Note that the above-described bending of the sensitive material 2 due to the extension of the piston rod lla of the central cylinder 11 may be performed while the table 8 is being moved as described above, in order to shorten the processing time.
This may be performed while the table 8 is being raised by the table swinging mechanism 9. When the table 8 is stopped, the cylinders 10, 11.12 are operated to extend the piston rods 10a, lla, 12a at a constant speed, and the photosensitive material 2 is moved toward the platen 30 while maintaining its initial zero curvature. It is moved toward the photosensitive material support surface 30a. The movement of the photosensitive material 2 is stopped when the photosensitive material 2 comes into contact with the photosensitive material supporting surface 30a.
Since the photosensitive material 2 is curved with a larger curvature than a, the vertical center portion of the photosensitive material 2 always comes into contact with the photosensitive material support surface 30a first. When the movement of the photosensitive material 2 is stopped, the photosensitive material supporting surface 30a
Air suction is started from the air suction hole 30b provided in the suction cups 13, 14, and then the air suction of the suction cups 13, 14, and 15 is stopped.
．． 15 and transferred to the photosensitive material supporting surface 30a of the platen 30, and is suction-held at a predetermined position on the photosensitive material supporting surface 30a. Here, due to its own elasticity, the photosensitive material 2
The photosensitive material is expanded until it has the same curvature as the curvature of the photosensitive material (that is, the curvature is reduced) and is held entirely on the photosensitive material support surface 30a, but as described above, first, the central portion is Since it is released from the suction cups 13, 14, 15 after making contact, the contact portion with the sensitive material supporting surface 30a gradually increases from the center toward the upper and lower ends and comes into contact with the supporting surface 30a. Therefore, the photosensitive material 2 does not rub against the photosensitive material supporting surface 30a, and no scratches are caused on the photosensitive material supporting surface 3oa or the back surface of the photosensitive material 2.

As described above, when the photosensitive material 2 is supported on the photosensitive material supporting surface 30a of the platen 30, - the cylinders 10, 11, 1
2 U piston rods 10a, 11a, 12a
After reduction i, the photosensitive material conveying table 8 is moved to the left end position in FIG. 1, which is laterally away from the platen 30. When the sensitive material transport table 8 leaves the surface of the platen 30, the sub-scanning low-speed motor 24 is driven and the screw rod 22
is rotated, and the movable table 23, which had been waiting at the right end position in FIG. 1, is moved along the screw rod 22 toward the sensitive material transporting table 8 (to the left in FIG. 2). At the same time, the main scanning servo motor 2.5 supported by the movable Q and pull 23 is driven to rotate the rotary head 26, and between the needle electrode 32 mounted on the rotary head 26 and the sensitive material 2. A high voltage is applied to the laser beam irradiation system 330 and the semiconductor laser 34 is further driven by the drive circuit 36.The needle electrode 32 is moved around the surface of the photosensitive material 2 by rotating the rotating head 26 as described above. By moving the moving table 23 along with this, the surface of the photosensitive material 2 is moved in the direction of the curve axis, and the entire surface of the photosensitive material 2 is charged with corona.

The photosensitive material 2 charged as described above is irradiated with a laser beam from a laser beam irradiation system 33 that rotates and moves together with the needle electrode 32, and the photosensitive material 2 is exposed. That is, the surface charge is dissipated from the surface of the photosensitive material 2 in the portion irradiated with the laser beam, and the surface charge in the portion not irradiated with the laser beam is dissipated to form an electrostatic latent image. This electrostatic latent image drives the semiconductor laser 34 with a drive current modulated by the image signal as described above, corresponding to the main scanning by the rotation of the rotary head 26 and the sub-scanning by the axial movement of the rotary head 26. As a result, the electrostatic latent image Ge formed as described above (see FIG. 2), which forms a predetermined image, is immediately developed by the toner developing unit 27 that moves together with the rotating head 26. This developing unit 2
In step 7, the toner liquid circulation pump 45 is operated as described in [)11, so that the toner liquid T flowing into the toner liquid container 4"1 from the toner supply port 42 naturally flows inside the toner liquid reservoir space 40. The toner liquid flows down and is drawn out of the container 41 from the toner liquid outlet 43, passes through the toner liquid passage 44, and returns to the container 4.
It is cycled back to 1. The toner liquid T flowing in the container 41 as described above flows in contact with the photosensitive material 2 because the container 41 is open toward the photosensitive material 2, and the electrostatic latent image Get is developed by the toner, and the toner is Image Qt=i A shadow is formed, and the toner image Gt is fixed by a fixing agent. Like this 1
In this apparatus, development is carried out while circulating and flowing the toner liquid Ti, so that the toner liquid ψ evenly spreads over the surface of the photosensitive material 2, making it possible to perform uneven development and also speeding up the development time. Also, a charging needle electrode 32, a laser beam irradiation system 33 as an exposure source, and a developing unit 2.
Since charging, exposure, and development are performed while moving the photosensitive drum 7 integrally, the time required from charging to development is extremely short, and dark decay of the charged charges is less likely to occur.

In the apparatus of this embodiment, the narrow groove 39a communicating with the toner liquid outlet 43 is provided on the surface of the side edge plate 39 of the toner liquid container 41 as described above, so that the toner liquid flows inside this narrow groove 39a. Since the toner liquid T flows vigorously toward the toner liquid outlet 43, the toner liquid T does not easily leak out of the container 41. Note that the container 41 facing the photosensitive material 2 can be made of a conductive material and can also be used as a developing electrode.

A rinsing liquid R is circulated in the rinsing unit 28 which is moved together with the toner developing unit 27, and the rinsing liquid R washes away excess toner liquid T and the like adhering to the photosensitive material 2. In this rinsing unit 28 as well, the thin grooves 47a provided in the side edge plate 47 make it difficult for the rinsing liquid R to leak out from the rinsing liquid container 49.1 The sensitive material 2 rinsed with the rinsing liquid R is dried by hot air blown out from the air knife 29 (surin) 29a. This air knife 29 is used until the movable table 23 is moved a predetermined length and the phenomenon is completed, and until the movable table 23 is returned to the standby position (the rightmost position in FIG. 1) for taking out the photosensitive material 2. It is preferable to continue operating the photosensitive material 2 to sufficiently dry it. In addition, the air knife 2
9 is supported at a position away from the rotating head 26, the hot air from the air knife 29 scatters the rinse liquid R and the like to the surface of the condenser lens system 35 of the laser beam irradiation system 33, and the condenser lens, System 35 will not be contaminated.

After the development, rinsing and drying of the photosensitive material 2 is completed, move the moving table 2
3 is returned to the standby position as described above, the photosensitive material transport table 8 is moved to a position facing the photosensitive material 2 on the platen 30. Next, the photosensitive material 2 on the platen 30 is transferred to the photosensitive material conveying table 8 by an operation that is the reverse of the procedure for loading the photosensitive material 2 onto the platen 30. At this time as well, by operating the cylinders 10° 11.12, the photosensitive material 2 is pulled toward the table 8 from its upper and lower ends, and finally, it is pulled from the platen 30 in such a state that only the central portion is in contact with the photosensitive material support surface 30a. If it is removed, the photosensitive material 2 is prevented from rubbing against the platen 30, as in the case of loading as described above. The sensitive material conveying table 8, which holds the sensitive material 2 by suction on the suction cup 13°14.15, is returned to the left end position shown in FIG.
Here, the pair of conveyor belts 20, which were previously separated from each other by a large distance to allow the collection of the photosensitive material 2 from the stacking position, are now in a trench where the distance between them is slightly smaller than the width of the photosensitive material 2. The slide shafts 1B and '19 are moved in a direction toward each other. Next, the air suction of the suction cups 13, 14, and 15 is stopped, and the photosensitive material 2 is dropped onto the conveyor belt 20 (7), and the photosensitive material 2 is rotated in the direction of arrow B as described above. Conveyor belt 20 and arrow C
The plate-making unit 55tI'i is supplied into the plate-making unit 55 by a pair of conveyor belts 21 which are rotationally driven in the direction of the photosensitive material 2, which has been developed with toner. The portion that is not shielded from light and becomes al-soluble is eluted with a chemical to form a concave surface, and then rinsed, gummed, dried, etc., and an offset plate for printing is made.

As explained above, the rotary head type electrophotographic apparatus of this embodiment is used for recording plate patterns in a plate-making system. Of course, it is also possible to form it as a device that transfers and obtains copies. Further, although the platen 30 is fixed in the above embodiment, the moving table and the platen are supported at opposing positions, for example, on a loop-shaped wire or steel belt that is circulated, and both are moved in directions facing each other. In this way, each movement stroke can also be shortened.

As explained in detail above, the rotating head type electrophotographic apparatus of the present invention integrates charging, exposing, and developing means, and uses a rotating needle electrode as the charging means, so it has an extremely simple structure, small size, and low cost. It will be formed as follows. Furthermore, since the process from charging to development is carried out in a short period of time, dark decay of charges is unlikely to occur, making it possible to obtain high-resolution, high-quality electrophotographs.Furthermore, as mentioned above, charging means Since a needle electrode with a simple structure is used as the charging means, it is difficult for dust or dirt to adhere to the charging means, and maintenance is easy.

Also, in the apparatus of the present invention, many of the advantages of the recording method using the rotary head as described above can be obtained as they are.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a sectional view showing a part of the above embodiment, and FIG. 3 is a partially cutaway perspective view showing a part of the above embodiment in an enlarged manner. It is. 2... Sensitive material 22... Screw rod 23...
・Moving table 24...low-speed motor for sub-scanning 25...servo motor for main scanning 26...rotating head 27... toner development unit 30... platen 30a... platen Sensitive material support surface 31...Rotating body 31a...Surrounding surface 32 of the rotating body
... Corona charging needle electrode 33 ... Laser beam irradiation system 36 ... Semiconductor laser drive circuit 54 ... Light shielding member Ge ... Electrostatic latent image Qt ... Toner image Fig. 2 37 3 Figure (Volunteer) Procedure Ne Ft1 Official Book October 14, 1981 Patent Application No. 140885 2, Name of Invention Rotating Head Type Electrophotographic Device 3, Relationship with the Person Who Makes the Amendment Case Appointment of Patent Applicant Place 210 Nakakun, Minamiashigara City, Kanagawa Prefecture Name: Fuji Photo Film Co., Ltd. 4, Agent: 5-2-1-6 Roppongi, Minato-ku, Tokyo Number of inventions to be increased by J: None due to the amendment 7, Subject of the amendment Details Column 1 of ``Detailed Description of the Invention'' in the Specification, page 5, line 1, insert ``1 Short'' after ``Transformation Body''. 2) On the same page, insert "1 to be placed parallel to the moving direction of the moving table" next to "Wire electrode". 3) On the second line of the same page, next to “It is possible.”, “If the charging ■ is insufficient,
By arranging a plurality of these electrodes, an appropriate amount of charge can be obtained. ” is inserted. 4) Page 10, line 3 [Connected]. Next to J, insert "It is also possible to transmit power via a rotary transformer and signals via a rotary capacitor in a non-contact manner."

Claims (1)

[Claims] The movable table includes a rotary head having a corona charging electrode and an exposure source for forming an electrostatic latent image fixed to a rotating body rotatably supported, each facing outward from the circumference, and a rotary head extending in the axial direction of the rotary head. a platen having an electrophotographic photoreceptor support surface curved to face the surface of the rotating head; a table feeding means for moving the movable table in the axial direction of the rotating body; an electrophotographic processing unit supported on a moving table, a light source driving means for driving the exposure source in accordance with a desired modulation signal, and blocking external light from entering the photoreceptor that is being charged, exposed, and developed. A rotating head type electrophotographic device consisting of a light shielding member.