KR100234322B1 - Wet transcription photographing method - Google Patents

Abstract

Disclosed are a wet transfer photographic printer. The present invention for this purpose and the photosensitive belt circulating the path given by a plurality of rollers; Irradiation means positioned at an outer lower portion of the photosensitive belt to form an electrostatic latent image on an outer surface of the photosensitive belt; A developing apparatus for temporarily applying a developing solution comprising a toner having a predetermined color and a liquid carrier to a region where the latent electrostatic image is formed; First and second counter rollers positioned inside the photosensitive belt to support the photosensitive belt with respect to the developing apparatus; A drying apparatus for drying the developer applied to the photosensitive belt to form a toner image from which a liquid carrier is removed; A wet transfer photographic printer comprising a transfer apparatus for transferring the toner image onto a recording sheet, wherein the photosensitive belt is repeatedly raised at a predetermined angle while passing between at least one of the developing apparatus and the first and second counter rollers, It is characterized by the downward movement. The wet transfer photographic printer formed in this way provides horizontality to the photosensitive belt passing through the developing apparatus, so that the positioning plate LSU can be mounted on a single horizontal base under the photosensitive lamp, thereby simplifying the structure. Irradiation precision can be improved. In addition, since the developing device can be positioned horizontally, the liquid level of the developing solution inside the developing device is kept horizontal without being biased to one side in the developing device so that the supply of the developing solution to the developing roller is uniform, thereby increasing the work efficiency. have.

Description

Wet transcription photographing method

The present invention relates to a wet transfer photographic printer, and more particularly, to a wet transfer photographic printer having a photosensitive belt having a substantially horizontal transfer path.

BACKGROUND OF THE INVENTION A transfer photograph type printer such as a laser printer exposes a photosensitive medium such as a photosensitive drum or a photosensitive belt to form a latent electrostatic image and develops a powdery state on a photosensitive medium having an electrostatic latent image formed thereon. A device for printing a desired image by supplying a toner, which is a substance, or by spraying a developer in a liquid state to form an image corresponding to an electrostatic latent image, and then passing the paper through the rotating rollers in contact with the photosensitive medium. The photosensitive belt is a belt that circulates a given path formed by a plurality of rollers. In addition to the continuous circulation, it is necessary to maintain a tensioned state because the exposure is performed on the belt surface and the toner component is continuously applied according to the exposure. Do.

1 is a view schematically showing the main part of a conventional wet transfer photo printer.

As shown, the conventional wet transfer photographic printer includes a primary roller 10, a secondary roller 12 and a tertiary roller 14, and the first, second and third rollers 10, 12, And a photosensitive belt 18 which circulates through the path formed by the fourteen elements. Typically, the tertiary roller 14 is driven by a motor (not shown), the secondary roller 12 is a steering roller (steering roller) to prevent meandering by adjusting the tensile force applied to the photosensitive belt 18. . Under the photosensitive belt 18, a laser scanning unit (LSU) 32 for forming an electrostatic latent image by irradiating a laser beam to the photosensitive belt 18 according to an image signal, and a predetermined color is applied to an area where the electrostatic latent image is formed. A plurality of developing apparatuses 28 are provided for temporarily applying and developing a developing solution 30 containing a mixture of toner and liquid carrier. Reference numeral 36 denotes a drying device for drying a liquid carrier in the developing solution 30 temporarily coated on the surface of the photosensitive belt 18 by the developing device 28. The photosensitive belt 18 passing through the drying device 36 passes between the primary roller 10 and the transfer roller 38. At the same time, the image formed on the outer surface of the photosensitive belt 18 is transferred to the transfer roller 38, and then to the recording paper 42 inserted between the pressure roller 40 and the transfer roller 38. Delivered. Reference numerals 11 and 13 denote auxiliary rollers to guide the circular motion of the photosensitive belt.

On the other hand, inside the plurality of developing devices 28, a developing solution 30, which is a mixture of a toner having a predetermined color and a liquid carrier, is contained, and a developing roller is formed on the developing solution 30. 20, a squeeze roller 22 and a cleaning roller (not shown) are respectively provided. The developing roller 20 is located close to the lower part of the photosensitive belt 18, and temporarily applies the developing solution 30 to the electrostatic latent image formed on the outer surface of the photosensitive belt 18 by the LSU 32, and the cleaning roller is In contact with the developing roller 20, the developer 30 remaining on the surface of the developing roller 20 is removed. In addition, the squeeze roller 22 presses the excess developer used for developing the electrostatic latent image in the developing solution 30 temporarily coated on the photosensitive belt 18 by pressing the photosensitive belt 18 which is circulated to press and thin. It functions to form a developer film. The upper part of the squeeze roller 22 is provided with a second counter roller 26 with the photosensitive belt 18 interposed therebetween, and the photosensitive belt 18 generated when the squeeze roller 22 compresses the photosensitive belt 18. Corresponding to the upward pressing force with respect to), the pressing force in the downward direction is maintained. In addition, the first counter roller 24 is located at the side of the second counter roller 26, the angle of the photosensitive belt 18 to enter between the squeeze roller 22 and the second counter roller 26 and Adjust the position. That is, the first counter roller 24 is located inside the photosensitive belt 18 and its circumferential surface is in contact with the inner surface of the photosensitive belt 18, but presses the photosensitive belt 18 downward, The contact angle is adjusted to adjust the moving angle and position of the photosensitive belt 18 moving toward the squeeze roller 22.

However, as can be seen in the drawing, the conventional photosensitive belt driving method presses each first counter roller 24 downward, so that the photosensitive belt between the secondary roller 12 and the tertiary roller 14 is entirely lower. Is in the state of. Therefore, the inclination with respect to the horizontal surface of the photosensitive belt 18 between each developing device 28 is different, and thus the base 34 supporting the LSU 32 for irradiating light to the outer surface of the photosensitive belt 18. ) Must be provided separately, so that the installation position of the LSU 32 is different from each other, and there is a problem of adjusting the position during operation. In addition, each developing apparatus 28 is to be positioned perpendicular to the photosensitive belt 18, the photosensitive belt 18 is inclined, so that the developing apparatus must also be installed at different angles corresponding to the developing apparatus. Therefore, the developer in the developing device 28 is biased to one side in the developing device, so that the supplyability of the developing solution 30 to the photosensitive belt 18 may be poor. For example, if the developing solution 30 is unevenly distributed in the direction of the squeeze roller 22, the developing solution 30 will not be sufficiently supplied to the developing roller 24.

The present invention was created to solve the above problems, the first object is to adjust the position of the development roller, the squeeze roller, the first and second counter rollers, the photosensitive belt to maintain the horizontal, the photosensitive belt By attaching the LSU located at the bottom of a horizontal base, to provide a wet transfer type photo printer with a simpler structure and improved irradiation precision.

In addition, the second object of the present invention is to be able to install the developing apparatus horizontally so that the level of the developing solution inside the developing apparatus is kept horizontal without being deflected to one side in the apparatus, so that the supply of the developing solution to the developing roller is uniform. It is to provide a wet transfer photographic printer.

Figure 1 is a schematic diagram showing a belt driving state of a conventional wet transfer type printer.

Figure 2 is a schematic diagram showing a belt drive system of a wet transfer type printer according to a first embodiment of the present invention.

3 is a schematic diagram showing a belt drive system of a wet transfer photographic printer according to a second embodiment of the present invention;

<Explanation of symbols for main parts of drawing>

10,100,200: 1 Primary roller 11,13,101,103,201,203: Sub roller

12,102,202: 2nd roller 14,104,204: 3rd roller

16,136,236: Drying device 20,120,220: Developing roller

22,122,222: Squeeze roller 24,124,224: First counter roller

26,126,226: Second counter roller 28,128,228: Developing device

30,130,230: Developer 32,132,232: LSU

34,134,234: Base 36,136,236: Dryer

38,138,238: Transfer Device 38,138,238: Transfer Roller

40,140,240: Pressure roller 42,142,242: Recording paper

18,108,208: photosensitive belt

θ: tilt angle

In order to achieve the above object, the present invention, the photosensitive belt circulating the path given by a plurality of rollers; At least one irradiation means positioned at an outer lower side of the photosensitive belt to form an electrostatic latent image on an outer surface of the photosensitive belt; A developing apparatus for temporarily applying an appropriate amount of a developer comprising a toner having a predetermined color and a liquid carrier to a region where the latent electrostatic image is formed; First and second counter rollers positioned inside the photosensitive belt to support the photosensitive belt with respect to a developing apparatus; A drying apparatus for drying the developer applied to the photosensitive belt to form a toner image from which a liquid carrier is removed; A wet transfer photographic printer comprising a transfer device for transferring the toner image onto a recording paper, wherein the photosensitive belt is repeatedly raised at a predetermined angle while passing between at least one developing device and first and second counter rollers. It is characterized by maintaining a tension state while moving down a moving path moving downward, and also generally forming a horizontal path.

To this end, in the wet transfer photographic printer of the present invention, the position of the first counter roller with respect to the developing roller is substantially vertical, and the position of the second counter roller with respect to the squeeze roller is inclined at an angle clockwise with respect to the vertical line. It features. In addition, the position of the first counter roller with respect to the developing roller and the position of the second counter roller with respect to the squeeze roller are generally vertical, and with respect to the developing roller, a squeeze roller is provided at an upper portion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view illustrating a belt driving system of a wet transfer photographic printer according to a first embodiment of the present invention.

Referring to the drawings, the wet transfer type printer according to the present embodiment has a primary roller 100, a secondary roller 102 and a tertiary roller 104, and a path given by each of the rollers 100, 102 and 104. Circulating photosensitive belt 108, four LSUs (132) positioned on the outer bottom of the photosensitive belt 108 to form an electrostatic latent image on the outer surface of the photosensitive belt 108, and a photosensitive belt having the electrostatic latent image ( Four developing devices 128 are provided in a predetermined area of 108 to temporarily apply an appropriate amount of a developer consisting of a toner having a predetermined color and a liquid carrier. The tertiary roller 104 is a driving roller driven by a motor (not shown), the secondary roller 102 is a steering roller (steering roller) to prevent meandering by adjusting the tensile force applied to the photosensitive belt 108 to be. At the side of the tertiary roller 104, there is provided a drying apparatus 136 for drying the liquid carrier in the developing solution temporarily coated on the outer surface of the photosensitive belt 108 drawn out through the developing apparatus 128. In addition, the transfer roller 138 is installed in parallel with the photosensitive belt 108 in the upper portion of the primary roller 100, the pressure roller 140 is located on the upper portion of the transfer roller 138, The recording paper 142 inserted by the transfer roller 138 is pressed against the transfer roller 138. In addition, auxiliary rollers (101, 103) are provided inside the photosensitive belt (108) to adjust the tension of the photosensitive belt (108).

On the other hand, four LSUs 132 corresponding to the developing device 128 are attached to one base 134 on the outer lower portion of the photosensitive belt 108. Since the base 134 is horizontal with respect to the ground, each LSU 132 mounted on the upper surface of the base 134 is also horizontally installed to irradiate the irradiation light in the vertical upward direction to the outer surface of the photosensitive belt 108. Forms an electrostatic latent image.

) 기울어져 있다. 즉, 감광벨트(108)에 대하여 상기 스퀴즈 롤러(122)와, 제 2카운터 롤러(126)가 가압하는 가압지점이 서로 일치하지 아니하고, 감광벨트(108)에 대하여 스퀴즈 롤러(122)가 가압하는 지점이 제 2카운터 롤러(126)가 가압하는 지점보다 도면상 좌측에 있기 때문에, 감광벨트(108)의 순환경로는 상기 스퀴즈 롤러(122) 및 제 2카운터 롤러(126)사이를 통과하는 동안 약간 상승한다.The structure of each roller which participates in image development is as follows. The first counter roller 124 is installed on the developing roller 120 to which the developing solution 130 is supplied, with the photosensitive belt 108 interposed therebetween. The circumferential surface of the developing roller 120 does not directly contact the outer surface of the photosensitive belt 108, but is spaced a predetermined distance for the application of sufficient developer. The circumferential surface of the first counter roller 124 is in contact with the inner surface of the photosensitive belt 108 to adjust the angle of the photosensitive belt 108 moving to the squeeze roller 122. The second counter roller 126 is interposed between the photosensitive belt 108 and positioned above the squeeze roller 122, but between the center of rotation of the second counter roller 126 and the center of rotation of the squeeze roller 122. The relative position of is at an angle clockwise to the vertical line in the drawing (

) It is tilted. That is, the squeeze roller 122 and the squeeze roller 122 are pressed against the photosensitive belt 108 without the pressure points of the squeeze roller 122 and the second counter roller 126 pressed against the photosensitive belt 108. Since the point is on the left side of the drawing than the point at which the second counter roller 126 presses, the circulation path of the photosensitive belt 108 slightly during the passage between the squeeze roller 122 and the second counter roller 126. To rise.

In this embodiment, the positions of the first and second counter rollers 124 and 126 are fixed. Accordingly, the photosensitive belt 108 that has passed through the first counter roller 124a passes through the circumferential surface of the upper portion of the squeeze roller 122 while passing the second counter roller 126a while moving horizontally. The 122 is raised by the increased distance, and then it moves to the next developing device 128. The position of the top of the circumferential surface of the squeeze roller 122 is higher than the position of the bottom of the second counter roller 122, and since the horizontal positions of the first and second counter rollers 124 and 126 are the same, the second counter roller ( 126a and the photosensitive belt 108 which rises between the squeeze rollers 122 are inclined at a predetermined angle θ with respect to the horizontal plane when moving to the first counter roller 124b installed in the next developing device 128. . The angle is preferably about 3 degrees to 5 degrees. Therefore, the inclination of the photosensitive belt 108 passing between the rollers is repeatedly repeated in the same manner so that the photosensitive belt 108 continuously moves through the four developing devices 128, and repeatedly moves up and down. Passed by. Therefore, the flow of the photosensitive belt 108 during the passage through the developing apparatus as a whole moves generally horizontally while maintaining the tensioned state. Since the photosensitive belt 108 circulating through the developing device 128 is horizontal, the LSU 132 positioned below the photosensitive belt 108 to irradiate light vertically upward with respect to the outer surface of the photosensitive belt 108. ) Can also be installed horizontally, so that the LSU 132 can be mounted on the top surface of a single horizontal base 134. In addition, since a portion of the photosensitive belt 108 corresponding to each of the developing devices 128 is inclined at a predetermined angle θ with respect to the horizontal plane, in order to irradiate light to the outer surface of the inclined portion of the photosensitive belt 108. Since the incident light path and the reflected light path of the light are different, the optical interference phenomenon generated when the light is reflected vertically can be avoided. In addition, since each of the developing apparatuses 128 including the developing roller 120 and the squeeze roller 122 is installed corresponding to the position of the photosensitive belt 108, the developing apparatus is also horizontal because the photosensitive belt 108 is horizontal. It is provided so that the developing solution 130 in the developing device 128 is not localized to one side, and maintains a liquid level horizontal with respect to the photosensitive belt 108.

3 is a view illustrating a belt driving system of a wet transfer photographic printer according to a second embodiment of the present invention.

Referring to the drawings, the wet transfer photographic printer according to the second embodiment is very similar to the configuration of the wet electrophotographic printer of the first embodiment, but the position of each roller installed in each developing device 228 is changed. do. That is, the first counter rollers 224a and 224b and the developing rollers 220a and 220b are generally vertically positioned, and the second counter rollers 226a and 226b and the squeeze rollers 222a and 222b are also substantially vertically positioned.

The developing rollers 220a and 220b are not in contact with the outer surface of the photosensitive belt 208 but are spaced at regular intervals, and are configured to temporarily apply the supplied developing solution 230 to the outer surface of the photosensitive belt 208. The squeeze rollers 222a and 222b are installed so as to correspond to the second counter rollers 226a and 226b with the photosensitive belt 208 interposed therebetween, and come into contact with the photosensitive belt 208 to form the developing solution 230 from the developing roller 224. By pressing the supplied photosensitive belt 208, the excess developer except for the developer used for development is recovered from the photosensitive belt 208. The second counter roller 226 has a function of providing a pressing force in the direction of the squeeze roller 222 from the inside of the photosensitive belt 208 in response to the pressing force of the squeeze rollers 222a and 222b against the photosensitive belt 208. do.

On the other hand, the first counter roller 224 and the second counter roller 226 in which the circumferential surface is in contact with the inner surface of the photosensitive belt 208 are not installed at the same horizontal surface position, the second counter roller 226 The vertical position is provided at a higher position than the vertical position of the first counter roller 224. Therefore, the photosensitive belt 208 approaching the developing device 228 passes through the lower part of the circumferential surface of the first first counter roller 224a, changes its path, and moves up. At the same time, the developing solution (from the developing roller 220a) Received 230, the developer is temporarily applied to the outer surface of the photosensitive belt 208. As described above, since the vertical position of the second counter roller 226 is relatively high compared to the vertical position of the first counter roller 224, the photosensitive light passing between the developing roller 220a and the first counter roller 224a. The belt 208 is inserted between the squeeze roller 222a and the second counter roller 226a and ascends. Subsequently, the photosensitive belt 208 via the squeeze roller 222a and the second counter roller 226a moves toward the developing roller 220b and the first counter roller 224b installed in the next developing apparatus. It descends with the inclination of the predetermined angle (theta) with respect to a horizontal plane, and raises again, moving to the squeeze roller 222b and the 2nd counter roller 226b. In this way, the photosensitive belt 208 is repeatedly moved up and down, passing through the last developing device 228 to the drying device 236. In addition, the inclination angle θ of the horizontal plane is preferably about 3 degrees to 5 degrees.

In the photosensitive belt 208 passing through the developing apparatus 228 in the belt driving system configured as described above, the photosensitive belt 208 moving from the first developing apparatus to the final developing apparatus is generally horizontal. Therefore, since the photosensitive belt 208 is horizontal, the LSUs 232 provided corresponding to the photosensitive belt 208 can also be installed horizontally with respect to each other. That is, one horizontal base 234 is positioned below the developing unit 228 and the photosensitive belt 208, and the upper surface of the horizontal base 234 of the photosensitive belt 208 is inserted into each developing unit 228. By attaching the LSU 232 in the direction immediately below each location, the electrostatic latent image can be effectively formed on the outer surface of the photosensitive belt 208. Since the photosensitive belt 208 to which light is deposited from the LSU 232 is inclined about 3 to 5 degrees with respect to the horizontal plane, since the reflected light reflected from the outer surface of the photosensitive belt 208 proceeds in a different direction from the optical path of the irradiation light. The occurrence of optical interference is not caused. In addition, the developing apparatus located below the photosensitive belt 208 is also positioned horizontally like the photosensitive belt 208, so that the liquid level of the developing solution 230 is maintained horizontally in the developing apparatus 228, thereby developing the developing roller. The supply to 220 is stable.

The present invention has been described in detail with reference to specific embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is possible.

The wet transfer photo printer according to the present invention as described above can attach the positioning plate LSU to a single horizontal base on the lower portion of the photosensitive belt by providing horizontality to the photosensitive belt passing through the developing apparatus. Can be simplified and irradiation precision can be improved. In addition, since the developing apparatus can also be positioned horizontally, the liquid level of the developing solution inside the developing apparatus is kept horizontal without being biased to one side in the apparatus, so that the supply of the developing solution to the developing roller is uniform, thereby increasing the work efficiency. have.

Claims (5)

A photosensitive belt for circulating a path given by a plurality of rollers; At least one light irradiation means positioned at an outer lower side of the photosensitive belt to form an electrostatic latent image on an outer surface of the photosensitive belt; A developing apparatus for temporarily applying an appropriate amount of a developer comprising a toner having a predetermined color and a liquid carrier to a region where the electrostatic latent image is formed; First and second counter rollers positioned inside the photosensitive belt to support the photosensitive belt with respect to the developing apparatus; A drying apparatus for drying the developer applied to the photosensitive belt to form a toner image from which a liquid carrier is removed; A wet transfer photograph type printer comprising a transfer device for transferring the toner image onto a recording sheet, The photosensitive belt maintains tension while passing between at least one or more developing devices and the first and second counter rollers, and generally forms a horizontal path while passing through a moving path repeatedly rising and falling at a predetermined angle. Wet transfer photo printer. The method of claim 1, wherein the position of the first counter roller with respect to the developing roller is substantially vertical, and the position of the second counter roller with respect to the squeeze roller is installed at an angle in a clockwise direction with respect to the vertical line. Transfer photo printer. The wet transfer method according to claim 1, wherein the position of the first counter roller with respect to the developing roller and the position of the second counter roller with respect to the squeeze roller are substantially vertical, and the squeeze roller is installed above the developing roller. Photo printer. The wet transfer photographic printer according to claim 2 or 3, wherein an angle formed between the photosensitive belt and the horizontal plane when the photosensitive belt moves through the squeeze roller to the first counter roller is about 3 to 5 degrees. . The wet transfer photo printer according to claim 1, wherein the light irradiation means is an LSU installed on a single horizontal base.

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