JPH02136880A - Recording device - Google Patents

Abstract

PURPOSE:To obtain an even image without fault by constituting a magnetic head for forming a magnetic latent image of a multiple number of independent heads, and making each contactable/uncontactable with a photosensitive belt independently. CONSTITUTION:A magnetic latent image forming means 9 is constituted of a multiple number of independant magnetic heads 90 and 91, and each contactable/uncontactable with an image carrier 1 independently. In this case, recording track widths of the magnetic heads 90 and 91 can be made short, and actually, the facing precision between the image carrier 1 and the magnetic heads 90 and 91 are improved. Then, the condition of contact or proximity of a toner image and each magnetic head 90 and 91 becomes good, and the toner image can be uniformly magnetized over the whole area without generating a large air gap. Thus, an even image without fault can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a recording device, such as a copying machine or a printer, which records various information as a visible image.

(Prior Art) Conventionally, electronic copying machines, plate making/printing devices, and the like have been known as recording devices for copying original documents. in general,
Electronic copying machines are easy to set up for copying operations and are easy to handle. In contrast, plate-making and printing equipment can create an original plate from a manuscript and use this master plate to repeatedly transfer onto recording paper, so once the original plate has been created, it can print at high speed, and it can also reproduce copies from the same original. There is an advantage that the higher the number of sheets, the lower the printing cost.

By the way, in conventional plate making and printing devices, when the number of copies from the same original is less than 1,000, the original plate accounts for a large proportion of the total printing cost, so the printing unit cost is higher than that of electronic copying machines. Moreover, since the process of making an original plate is required, there is a drawback that it takes time and effort to set up the work. On the other hand, electronic copying machines repeat processes such as charging, exposing, developing, and removing static electricity each time they copy one original, so even if the number of copies made from the same original increases, the cost per copy remains low. The copying speed is considerably slower than that of a printing machine.

To deal with these problems, electronic copying machines have come into practical use as an extension of conventional technology, capable of copying at a speed closer to that of printing, and without requiring the skilled work and setup required by printing machines. It is becoming more and more popular.

However, in order to increase the copying speed even higher, the power required for exposing the original, fixing the developer, and charging becomes extremely large. There is a problem in that the image quality is sacrificed due to unreasonableness in the image quality, etc.

Therefore, a first toner image corresponding to the image is formed and fixed on an image carrier such as a photoreceptor belt using a first magnetic toner that can be permanently magnetized, and this is magnetized by a magnetizing means such as a magnetic head. A master image is formed as a printing original plate, and a second toner image identical to the first toner image is obtained on the master image by developing the magnetic latent image formed as the master image with a second magnetic toner. A recording apparatus has been considered that performs recording by transferring this second toner image onto paper as a transfer material.

This type of recording device has the advantage of being able to make multiple copies of the same document at high speed, similar to a printing machine, with the same simple operation as a conventional electronic copying machine, and low power consumption. .

However, the above recording apparatus had the following drawbacks. That is, in general, in the process of magnetic recording, when a magnetic recording medium is magnetized by a magnetic head, it is necessary to bring the magnetic head into contact with the magnetic recording medium or to do so through a certain air gap of about several μm. When this air gap becomes, for example, 10 μm or more, a phenomenon occurs in which almost no magnetization occurs.

By the way, the recording track width (magnetizable width) of the magnetic head used in the above recording device that magnetizes the toner image formed on the image carrier must be the same width as the effective width of the image on the image carrier. shall be. For example, when forming an image in the horizontal direction of an A4 size paper, a width of about 30 cm is required.

That is, in order to uniformly magnetize the toner image on the image carrier over the entire area, the contact state or proximity state between the magnetic head having a recording track width of 30 cITl and the toner image must be set to a gap of 10 μm or less. There is a need.

However, there is a limit to the dimensional accuracy in manufacturing the image carrier or the magnetic head, and it is extremely difficult to maintain uniform contact or proximity between the magnetic head and the master image within 10 μm.

Therefore, when a toner image is magnetized, an extremely large air gap occurs, resulting in a portion of the toner image that is not magnetized, which causes missing prints in fine lines and solid patterns in the recorded image. The drawback was that a uniform and clear image could not be obtained.

(Problems to be Solved by the Invention) The present invention provides that when a toner image as described above is magnetized, a portion of the toner image that is not magnetized is generated due to the generation of a portion where the air gap becomes extremely large. This was developed to solve the problem of not being able to obtain uniform and clear images due to missing prints in thin lines and solid patterns in images. Similarly, it is an object of the present invention to provide a recording device that can perform high-speed copying of multiple sheets from the same original, reduce power consumption, and obtain uniform and clear images without image defects.

[Structure of the Invention] (Means for Solving the Problems) A recording device of the present invention includes a moving image carrier, an electrostatic latent image forming means for forming an electrostatic latent image on the image carrier, and an electrostatic latent image forming means for forming an electrostatic latent image on the image carrier. a first developing means for developing the electrostatic latent image formed on the image carrier by the latent image forming means with a first magnetic toner capable of permanent magnetization; a fixing means for fixing a first toner image developed with a magnetic toner on the image carrier, the first toner image fixed by the fixing means being independently attached to the image carrier; A magnetic latent image forming means for forming a magnetic latent image by magnetization by a plurality of magnetic heads having recording tracks of a predetermined width that are provided so as to be able to approach and separate; a second developing means for developing with the second magnetic toner;
The present invention is characterized by comprising a recording means that performs recording by transferring a second toner image developed with a magnetic toner onto a transfer material.

(Function) By configuring the magnetic latent image forming means with a plurality of independent magnetic heads, each of which can approach and separate from the image carrier independently, the recording track width of each magnetic head can be shortened. This substantially improves the precision of the alignment between the image carrier and the magnetic heads, eliminates the occurrence of a large air gap, and improves the contact or proximity between the toner image and each magnetic head. can be magnetized uniformly over the entire area, and as a result, a uniform image without defects can be obtained.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a recording apparatus of the present invention. In the figure, reference numeral 1 denotes a drum around which a photoreceptor belt (image carrier) 14 is wound. system (electrostatic latent image forming means) 3, a first developing device (first developing means) containing the first magnetic toner T1;
4. A first toner image fixing device (fixing means) consisting of a plush lamp 5, a second developing device (second developing means) 6 containing the second magnetic toner T2, a pre-transfer charger (recording 7, a transfer charger (recording means) 8, and a magnetic head group 9 as a magnetic latent image forming means for magnetizing the first toner image and forming a magnetic latent image.

The magnetic head group 9 is composed of a plurality of independent magnetic heads for longitudinal magnetization, and includes a row including a magnetic head 90 and a row including a magnetic head 91 in the width direction of the drum 1 (or photoreceptor belt 14). They are arranged in two rows.

The structure of this magnetic head group 9 will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is a side view of one independent magnetic head 90, 91, etc., which has a single recording track width TW, and includes a core 31 and a coil 32 wound around this core 31. , and a housing 33 (see FIG. 3) that holds the core 31. A gap g is provided on the surface of the core 31 that contacts or faces a first toner image 51 (described later), and the magnetic flux generated in the gear 112 causes the first toner (image 51 to be magnetized). E is a power source for passing current through the coil 31, and the voltage W of an alternating rectangular wave with a constant frequency outputted from the power source E is supplied to the coil 32.

By applying an alternating rectangular wave voltage W having a constant frequency, an alternating rectangular magnetic field is generated in the vicinity of the gap g between the magnetic heads 90, 91, . . . .

It is preferable that the recording track width (magnetizable width) TW of the magnetic heads 90, 91, .

FIG. 3 shows a preferred example in which the magnetic heads 90, 91, . . . are arranged on the drum 1.
Fig. 1 schematically shows the arrangement state of Fig. 1 as viewed from the gear g side. In the figure, ten magnetic heads 9
0.91... The magnetic head group 9 is arranged perpendicularly to the moving direction A of the photoreceptor belt 14, and is staggered in two rows, the gl row and the g2 row. It is arranged in a shape. That is, ten magnetic heads 90, 91, . . . having a recording track width TW cover the entire effective image width.

The magnetic head group 9 is arranged so as to be movable in a direction toward and away from the drum 1 (in the direction of arrow BC in the figure). That is, as shown in FIG. 4, the protrusions 62a and 62b fixed to both sides of the magnetic heads 90, 91...
Support members 60a and 60 are provided to be movable in the direction of arrow BC with respect to the housing (not shown) via a and 61b.
During the master image creation process to be described later, by moving the supporting members 60a and 60b in the direction of arrow C in the figure, each magnetic field 90,
91... is the first toner image 51 on the photoreceptor belt 14
It is designed to be brought into contact with a predetermined pressure. Further, during the printing process, the support members 60a and 60b are
By being moved in the direction, each magnetic head 90,91
... are arranged to wait apart from the master image on the photoreceptor belt 14.

The exposure optical system 3 guides the reflected light 3a from the original to form an image on the photoreceptor belt 14 wrapped around the drum 1, thereby forming an electrostatic latent image on the photoreceptor belt 14. .

Further, the paper P as a material to be transferred is taken out one by one by the paper feed roller 11 from the paper feed cassette 45, and guided to the circumferential surface of the drum 1 by a pair of resist φ rollers 12 at a certain timing. It looks like this. 1 in the diagram
3 is a turn roller, and 10 is a fixing device for fixing the second toner image on the paper P.

The drum 1 can be rotated in the direction of arrow A in the figure at least at a first speed v1 and a second speed V2 by a drive mechanism (not shown). That is,
10 to 50 m as the first speed V1 of the circumferential surface of the drum 1
The speed of m/see is 500 as the second speed V2.
A speed of mm/see or higher is selected and driven.

A photoreceptor heald 14 serving as an image carrier is wound around the outer periphery of the drum 1 . The photoreceptor belt 14 is made of a dielectric material capable of forming an electrostatic latent image, and has a photosensitive layer 14a of zinc oxide sensitized to long wavelengths with a dye such as rose bengal to provide sensitivity in the visible range. However, it goes around once around the outer periphery of the drum 1. This photoreceptor belt 14 is fed out onto the drum 1 from a supply roll 15 each time a new document of a predetermined size is to be printed, and the used portion is wound onto a take-up roll 16. It has become.

The first developing device 4 containing the first magnetic toner T1 is
This is a magnetic one-component developing device, which includes a non-magnetic sleeve 17 that rotates in synchronization with the drum 1, a magnet roll 18 that is placed inside this sleeve 17 and rotates in the same direction as the drum 1, and a doctor blade 19. It is configured.

The second developing device containing the second magnetic toner T2 is also composed of a non-magnetic sleeve 20, a magnet roll 21, and a doctor blade 22, but the magnetic field generated by this magnet roll 21 is the master. @! 52
The magnetic roll 21 is fixed (in order to reduce the influence on the magnetic groove formed in the Sakae) so that the middle between the N pole and St!! (not rotated).

The second magnetic toner T2 is a high-resistance magnetic toner containing a magnetic material with low residual magnetization (or coercive force), such as Fe2O4.

Further, as the magnetic particles to be contained in the first magnetic toner for forming the permanently magnetized master image 52, an iron oxide-based magnetic material is suitable, and in particular, γ-Fe2O3 having a coercive force of 300 milliseconds or more, Barium ferrite, lead ferrite, cobalt ferrite, nickel ferrite, C
rO2 etc. are suitable.

The resin for the binder of the first magnetic toner is selected depending on the fixing method, and examples thereof include waxes such as ethylene-vinyl acetate copolymer, Carteva wax, paraffin wax, polyethylene wax, and amide wax. class, ethylene-acrylic acid copolymer,
Low molecular weight polypropylene, styrene, epoxy, polyester, polyamide, copolymer of acrylic acid or methacrylic acid and long chain alkyl acrylate, long chain alkyl methacrylate, styrene and long chain alkyl acrylate,
Copolymers with long-chain alkyl methacrylates are preferred.

Furthermore, in addition to the magnetic particles and the binder resin, the first magnetic toner may contain an electrical resistance adjuster (for example, carbon black, etc.) or other external additives depending on the toner performance required. It is added as appropriate.

Further, it is desirable that the content of the magnetic particles contained in the first magnetic toner be as large as possible from the viewpoint of magnetic properties. A practically satisfactory magnetic toner can be obtained by containing H in an amount of up to 70% by weight. Furthermore, by setting the electrical resistance of the first magnetic toner to 10<9>Ω·ω or less and using it as a conductive magnetic toner, an extremely good image without edge effects can be obtained. This is because the first magnetic toner is used only for forming the master image and is not used for electrostatic transfer to a transfer material, etc., so there is no need to make it a high-resistance magnetic toner, and therefore the conductive magnetic toner This is an effect caused by the following.

Further, since the first magnetic toner is used only to form a master image, it may be of any color, and there is no restriction on the toner composition depending on the color.

Next, the operation of the recording apparatus configured as described above will be explained in detail with reference to the recording process diagrams shown in FIGS. 5 to 13.

The recording process in this recording apparatus is roughly divided into two processes: a master image creation process and a printing process.

First, the master image creation process will be explained.

That is, as shown in FIG. 5, the photoreceptor belt 14 wound around the drum 1 rotates in the direction of the arrow shown in the figure at a speed v1, and at this time, the photoreceptor layer 14a of the photoreceptor belt 14 is uniformly coated by the charger 2. is negatively charged (e.g. -6
00V). Next, as shown in FIG. 6, image exposure is performed by the exposure optical system 3, and the charges on the portions irradiated with the light 3a disappear, forming an electrostatic latent image corresponding to the image on the photosensitive layer 14a. Ru. As shown in FIG. 7, the electrostatic latent image thus obtained is formed by the first magnetic toner T1 carried by the interaction between the sleeve 17 and the magnet roll 18 at a position facing the first developing device 4. It is developed with That is, since the first magnetic toner T1 is a conductive magnetic toner, a charge is induced by the latent image charge on the photosensitive layer 14a, it is charged, and is attracted and attached to the photosensitive layer 14a by Coulomb force, thereby being developed. . Next, as shown in FIG. 8, the first magnetic toner 50 attracted and adhered to the photosensitive layer 14a is instantaneously melted by the flash lamp of the fixing device 5, and is thermally fixed on the photosensitive layer 14a to form the first magnetic toner. A magnetic toner image 51 is obtained.

The first toner image 51 made of the first magnetic toner T1 thus formed on the photoreceptor belt 14 is magnetized by the magnetic head group 9 as a magnetic latent image forming means, as shown in FIG. A master image 52 is formed as a magnetic latent image. The magnetization process for forming this magnetic latent image will be described in detail later.

FIG. 15 shows the magnetic characteristics of the first magnetic toner T1, that is,
This shows an example of a hysteresis loop, where the coercive force He
is approximately 1,750 oersted. That is, the magnetic latent image 52 formed on the photoreceptor belt 14 through the series of master image forming steps described above has a coercive force of 1750 oersted.

A master image 52 as a magnetic latent image is obtained through the master-1 image creation steps shown in FIGS. 5 to 9 above.

In this master image forming step, the photoreceptor belt 14 is moved at a speed of 1 in all cases, and the movement is carried out sequentially and continuously during one rotation of the drum 1.

Next, the printing process will be explained. After the above mask image forming step is performed over one revolution of the drum 1 by one rotation of the drum 1, the drum 1 is rotated at a high speed at a second speed v2. First, as shown in FIG. 10, the master image 52 as a magnetic latent image has a sleeve 20 and a magnet roll 2 at a position facing the second developing device 6.
The second magnetic toner J2 carried by the interaction of
is attracted and attached by magnetic attraction, and a second toner image 53 identical to this master image 52 is obtained on this master image 52. Next, this second toner image 53 is
As shown in FIG. 11, it is charged to negative polarity by the pre-transfer charger 7.

The second toner (kettle 53) charged with this negative polarity
Then, as shown in FIG. 12, the transfer charger 8
The image is transferred onto the paper P by being attracted to the paper P which is charged with a positive polarity.

Next, as shown in FIG. 13, the paper P on which the second toner image 53 has been transferred is conveyed to the fixing device 10, and a duplicate image is obtained on the paper P by being fixed by the fixing device 10. .

Hereinafter, when duplicating the same image, a large number of duplicated images can be obtained at high speed by repeatedly performing only the printing process described above.

Here, among the above recording steps, the magnetic latent image forming step and the second
The developing process will be explained in detail using FIG. 14.

In the recording apparatus of the present invention, the important point in order to obtain a uniform image without missing prints is to uniformly adhere the second magnetic toner T2 over the entire surface of the master image 52.
The purpose is to form a negative magnetic latent image on the master image 52, that is, a leak magnetic field (leak magnetic flux) that can uniformly adhere the second magnetic toner T2 onto the master image 52. The goal is to form a pattern.

In order to form a --like magnetic latent image on the master image 52, the present inventors conducted various experiments and found that the master image (first It has been found that by magnetizing the toner image (toner image) 52, a leakage magnetic field pattern can be obtained that allows the second magnetic toner T2 to be uniformly adhered onto the master image 52.

The above-mentioned magnetization in which the magnetization direction is alternately reversed over a certain length is magnetized in the in-plane direction of the master image 52 (longitudinal direction magnetization), and magnetization in the thickness direction of the master image 52 (perpendicular direction). It was found that a uniform leakage magnetic field pattern can be obtained for both magnetization).

FIG. 14 shows the magnetic head 9 for longitudinal magnetization shown in FIG.
This figure schematically shows a developing state in which the second magnetic toner T2 adheres to the magnetic latent image on the master image 52 formed by 0.91.... As mentioned above, the magnetic head 9
The photoreceptor belt 14 moves and passes under the magnetic head 90° 91 at a constant speed v1 while a magnetic field alternating at a constant time is generated near the gear g of 0.91... Therefore, the master image 5 is displayed on the master image 52.
A magnetic latent image is formed in which the direction of magnetization is alternately reversed over a constant length in the direction of the surface of FIG. That is, as shown in FIG. 14, a leakage magnetic flux 55 is generated from the magnetization transition portion M, and a magnetic field is generated outside. This leakage magnetic flux 55 is transmitted to each magnetization transition portion M
The second magnetic toner T2, which is carried to the vicinity of the master image 52 by the second developing device 6, forms a toner chain along the loop of this leakage magnetic flux 55, and the second magnetic toner T2 is transported to the vicinity of the master image 52 by the second developing device 6. A second toner image 53, which is uniformly deposited on 52 and is developed, is identical to the master image 52.
is obtained.

Here, the constant length g, that is, the distance between the magnetization transition parts M, is the frequency of the voltage W of the alternating rectangular wave, f (Hz)
, the moving speed of the photoreceptor belt 14 (more precisely, the relative speed between the magnetic heads 90, 91... and the photoreceptor belt 14)
If V 1 (mm/see), then simply f)
−V 1 /2 f (mm). For example, f −1kHz, V 1-60ml1/see
Then, 47-0.03a+m, that is, 30μm
becomes.

On the other hand, the same applies to the case of perpendicular magnetization, and the magnetic head group 40 in this case is configured as shown in FIG. 16. Note that the figure only shows the configuration of one magnetic head 40, and magnetic heads similar to this are arranged in a staggered manner as shown in FIG. 3 in the case of horizontal magnetization described above. The same is true.

The magnetic head 40 includes a main magnetic pole 41 having a thin thickness,
It is comprised of a thick auxiliary magnetic pole 42 disposed opposite to the main magnetic pole 41 with the photoreceptor belt 14 in between, and a coil 43 wound around the auxiliary magnetic pole 42 . A voltage W of an alternating rectangular wave having a constant frequency similar to that described in the above embodiment is applied to the coil 43. When this voltage W is applied, a rectangular wave-like alternating magnetic field is generated between the main magnetic pole 41 and the auxiliary magnetic pole 42. And master statue 5
The photoreceptor belt 14 on which the master l! j! A magnetic latent image in which the direction of magnetization is alternately reversed at a constant length g in the thickness direction is formed on the layer 52 .

FIG. 17 shows a second magnetic/long edge on the master image 52 formed by the magnetic head 40 for perpendicular magnetization.
This figure schematically shows a developing state in which magnetic toner T2 is attached. That is, leakage magnetic flux 56 is generated from the magnetization transition portion M, and a magnetic field is generated externally. This leakage magnetic flux 56 forms a loop between each magnetization transition portion M, and the second magnetic toner T2 carried near the master image 52 by the second developing device 6 follows the loop of this leakage magnetic flux 56. , forming a toner chain, which is uniformly deposited on the master image 52 and developed, resulting in a second toner image 53 identical to the master image 52.

In this case as well, the constant length g, that is, the distance between the magnetization transition parts M, is such that the frequency of the voltage W of the alternating rectangular wave is f (H
z) The moving speed of the photoreceptor belt 14 (more precisely, the relative speed between the magnetic head 40 and the photoreceptor belt 14) is V 1
(mm/see), simply ρ-Vl/2
It is expressed in f (mm). And, for example, f-1kHz
If zSVl-60/see, then (
1-0.03 mm5, that is, 30 μm.

If a magnetic latent image as explained above is formed on a master image, a uniform image can be obtained.
First of all, the magnetic head that magnetizes the master image is
It is a necessary condition that the master image be in contact with the master image or in close proximity with a sharp and short air gap of 10 μm or less, and this can be reliably achieved by the present invention.

That is, a magnetic head for forming a magnetic latent image is composed of a plurality of independent magnetic heads 90, 91...
By configuring each magnetic head to be able to approach and separate from the photoreceptor belt 14 independently, the recording track width TW of each magnetic head 90, 91, . Recording head 90.91...
The facing precision between the first toner @51 and the magnetic head 90. is improved, and a large air gap does not occur.
The contact with or proximity to 9... becomes good, and the first
A master image can be obtained in which the toner image 51 is uniformly magnetized over the entire area, and as a result, a uniform image without defects can be obtained.

The advantage of the recording device of the present invention is that it can make multiple copies from the same original at high speed. There is no need to perform the second step.
Development process (Figure 10), pre-transfer molding process (Figure 11)
This is achieved by repeatedly performing only the printing process consisting of , transfer process (FIG. 12), and fixing process (FIG. 13) at high speed.

In other words, in the printing process, electrostatic latent images and
In addition, since the step of forming a magnetic latent image is not necessary, it is possible to copy a large number of sheets at high speed.

In the above embodiment, the plurality of magnetic heads are arranged in a staggered manner, but the arrangement is not limited to this, and any arrangement may be used as long as it does not depart from the gist of the present invention. Further, in the above embodiment, the photosensitive layer 1a is made of zinc oxide, but the photosensitive layer 1a is not limited to this, and a photosensitive member such as an organic photoconductor may be used, or a dielectric material may be used as an image carrier instead of a photosensitive member, and a static An electrostatic latent image may be formed by an electrographic method.

Further, the image exposure means for the photosensitive layer 14a may be configured to irradiate an image-modulated laser beam instead of irradiating the reflected light from the original in the above embodiment.

[Effects of the Invention] As described above, according to the present invention, the contact or proximity between the master image and the magnetic head is improved, the master image can be uniformly magnetized over the entire area, and as a result, the master image can be magnetized uniformly over the entire area, and as a result, the master image can be magnetized uniformly over the entire area. A recording device that not only produces uniform final images, but can also make multiple copies from the same document at high speed, similar to a printing machine, with the same simple operation as a conventional electronic copying machine, and with low power consumption. Can be provided.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Figure 1 is a schematic configuration diagram of a recording device, Figure 2 is a schematic sectional view of a magnetic head for horizontal magnetization, Figure 3 is a diagram showing the arrangement of the magnetic head, Fig. 4 shows the installation state of the magnetic head, Figs. 5 to 13 are process diagrams for explaining the recording process, and Fig. 14 shows the adhesion state of the second magnetic toner in the case of horizontal direction magnetization. FIG. 15 is a graph showing the magnetic properties of the first magnetic toner, FIG. 16 is a schematic cross-sectional view of a magnetic head for perpendicular magnetization, and FIG. 17 is a graph showing the magnetic properties of the second magnetic toner for perpendicular magnetization. FIG. 3 is a schematic diagram showing the state of adhesion of toner. 2... Charger (D layer image forming means), 3...
・Exposure optical system (electrostatic latent image forming means), 4... First developing device (first developing means) 5... Fixing device (fixing means) 6... Second developing device (first developing device) 2) Developing means) 7...
- Pre-transfer charger (recording means) 8... Transfer charger (recording means) 9... Magnetic head group (magnetic latent image forming means) 14... Photoreceptor belt (image carrier), T1.
...First magnetic toner T2...Second magnetic toner 5
1...first toner image, 52...master image, 53...
...Second toner image. Applicant's representative Patent attorney Takehiko Suzue Figure 5 Figure 6 Figure 1 Funeral map /. Figure No. ] ○ Figure ] 4 Figure Figure Figure Figure 1 Procedure It''j Ordinary Book (Method) Contents of the Amendment 1989 1221'' Specification Box Page 27, Line 1, 2nd Line: 2nd Toa

Claims (1)

[Scope of Claims] A moving image carrier; an electrostatic latent image forming means for forming an electrostatic latent image on the image carrier; and an electrostatic latent image forming means for forming an electrostatic latent image on the image carrier. a first developing means for developing the electrostatic latent image with a first magnetic toner capable of permanent magnetization; and a first toner image developed by the first magnetic toner of the first developing means. a fixing means for fixing the first toner image on the image carrier; and a fixing means for fixing the first toner image on the image carrier;
a magnetic latent image forming means for forming a magnetic latent image by magnetizing the image carrier with a plurality of magnetic heads each having a recording track of a predetermined width, each of which is independently movable toward and away from the image carrier; a second developing means for developing the magnetic latent image formed by the forming means with a second magnetic toner; and a second toner image developed with the second magnetic toner of the second developing means is transferred. 1. A recording device comprising a recording means for recording by transferring onto a material.