KR19990074126A - Carrier Drying Equipment for Wet Printing Press - Google Patents

Abstract

A carrier drying apparatus for a wet printer for drying a liquid carrier remaining on a transfer surface of a photosensitive medium, comprising: a heater disposed close to the photosensitive medium to generate heat for drying a liquid carrier; Disclosed is a carrier drying apparatus for a wet printing machine comprising a heat transfer means for forcibly transferring heat generated from a heater to a photosensitive medium.

Description

Carrier Drying Equipment for Wet Printing Press

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier drying apparatus for a wet printer, and more particularly, to a carrier drying apparatus for a wet printer which prevents damage of toner adhered to a photosensitive medium transfer surface while drying the carrier on the surface thereof.

Generally, wet printers such as color printers and copiers attach a developer mixed with a solid toner having a predetermined color and a liquid carrier serving as a solvent to an electrostatic latent image formed on a photosensitive medium such as a photosensitive belt traveling in an endless track. This is a printing apparatus which obtains a desired image.

FIG. 1 is a schematic configuration diagram showing a general wet printer, wherein a photosensitive belt 10 supported by a plurality of support rollers 11 and traveling in an endless track, a plurality of developing devices 14, and a carrier drying device ( 20).

The photosensitive belt 10 is maintained in a charged state at a predetermined potential by the charger 12, and the potential is changed by a beam scanned by the laser scanning unit 13 installed in each of the developing devices 14. As a result, an electrostatic latent image is formed on the surface. After the developer 14 selectively attaches a developer mixed with a toner and a liquid carrier to the electrostatic latent image region of the photosensitive belt 10, the toner T is filmed and other than the filmed toner T. Most carriers are allowed to be removed. The filmed toner T is transferred to the transfer roller 15, and to the printing paper P passed between the transfer roller 15 and the fixing roller 16 from the transfer roller 15 by the surface energy difference. Is printed.

The carrier drying apparatus 20 is for completely removing the liquid carrier remaining in the photosensitive belt 10 without being completely removed from the developer 14, and includes a drying roller 22 and a heating roller 24. .

The drying roller 22 is rotated in contact with the photosensitive belt 10, to remove the liquid carrier from the surface of the photosensitive belt (10). The heating roller 24 is in contact with the drying roller 22, while applying heat to the drying roller 22 to evaporate the carrier of the liquid attached to the drying roller 22. And, some of the vaporized carrier vapor is liquefied and recovered in the drying vessel 28, the other is sucked by the pump 26 to pass through a predetermined path.

However, in the conventional carrier drying apparatus as described above, since the drying roller comes into contact with the photosensitive belt, the toner filmed together with the carrier is torn off due to the friction, and the toner filmed with the damaged toner is damaged. There is a problem of poor quality.

In addition, since the photosensitive belt travels in contact with the drying roller, there is a problem such as being overloaded by the frictional force.

The present invention has been made to solve the above problems, and to provide a carrier drying apparatus for a wet printing machine having an improved structure to remove the carrier while preventing the toner of the photosensitive belt transfer surface from being damaged. have.

1 is a schematic configuration diagram of a wet printing machine employing a conventional carrier drying apparatus.

Figure 2 is a schematic diagram showing a part of a wet printing machine employing a carrier drying apparatus according to a preferred embodiment of the present invention.

<Brief description of the main symbols in the drawings>

10. Photosensitive belt 11. Support roller

14 .. Development 15. Transfer roller

32. Heater 34.

36. Guide member 40. Collection container

42..Suction tube 44..Recovery tube

46..Suction pump

Carrier drying apparatus for a wet printer according to the present invention for achieving the above object is a carrier drying apparatus for a wet printer for drying the carrier of the liquid remaining on the transfer surface of the photosensitive medium, the liquid is installed in close proximity to the photosensitive medium A heater for generating heat for drying the carrier; And heat transmitting means for forcibly transmitting heat generated by the heater to the photosensitive medium.

Hereinafter, a carrier drying apparatus for a wet printer according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 2 is a schematic diagram showing a part of a wet printing machine employing a carrier drying apparatus according to an embodiment of the present invention. Here, the same reference numerals as the reference numerals of the drawings shown above indicate the same components.

Referring to Figure 2, the carrier drying apparatus according to the present invention is a heater 32 for generating heat for drying the carrier remaining on the photosensitive belt 10 transfer surface (10a), and generated in the heater 32 And a heat transmitting means for forcibly transferring heat to the transfer surface 10a.

In the present exemplary embodiment, the heat transmitting means includes a blower fan 34 disposed close to the heater 32 and air blown by the blower fan 34 along the transfer surface 10a of the photosensitive belt 10. It is provided with a guide member 36 to guide the movement.

The guide member 36 is installed to surround a portion of the photosensitive belt 10 and to face the transfer surface 10a. The guide member 36 has an intake port 36a through which air is sucked from the outside, and an extraction hole 36b through which air and carrier vapors from the guide member 36 are extracted. The heater 32 is installed in the suction port 36a to be driven by a predetermined driving means to generate heat. In addition, the blower fan 34 is installed in the guide member 36 so as to be close to the heater 32, and transfers air heated by the heat generated by the heater 32 to the guide member 36 and the transfer surface. Forced blow between (10a). The suction port 36a is preferably provided below the guide member 36 in consideration of the path of the heated air in the guide member 36. The extraction port 36b is a place through which the forced air blown in the guide member 36 and the carrier vapor evaporated by the heated air from the transfer surface 10a exit, and above the guide member 36. It is preferable to provide.

Here, the collection member 40 for collecting the carrier vapor extracted through the extraction port 36b is preferably installed in the guide member 36. The collection container 40 is connected to each other while sharing the guide member 36 and the extraction port (36b). The collection vessel 40 is connected to the recovery pipe 44, the suction pipe 42. The recovery pipe 44 is for recovering the liquefied carrier from the carrier vapor in the collection container 40, it is provided below the collection container (40). The suction pipe 42 is a passage that sends a predetermined path to liquefy the carrier vapor in the collecting container 40, and is provided above the collecting container 40. In addition, the suction pipe 42 is provided with a suction pump 46 for forcibly sucking and transporting the carrier vapor in the collection container 40.

The operation of the carrier drying apparatus for a wet printer having the configuration as described above will be described. On the transfer surface 10a of the photosensitive belt 10 passing through the developer 14, a small amount of liquid carrier remains together with the filmed toner T. The liquid carrier remaining on the transfer surface 10a is evaporated by the heat generated by the heater 32. Looking at the process, the heater 32 is driven by a predetermined driving source to generate heat. The heat generated by the heater 32 heats the ambient air. The heated air is forcedly blown between the guide member 36 and the transfer surface 10a by the blower 34, and heats and evaporates the liquid carrier remaining on the transfer surface 10a. Air forcedly blown along the guide member 36 and carrier vapor evaporated from the transfer surface 10a are sent into the collecting container 40 through the extraction port 36b. Then, some of the carrier vapor among the air and carrier vapor collected into the collecting container 40 is liquefied and recovered through the recovery pipe 44, and the remaining carrier vapor and air are forcibly sucked by the suction pump 46 to suck the suction pipe ( 42) to a predetermined path. In this way, the transfer surface 10a is indirectly heated by heated air heated by the heat generated by the heater 32, and the carrier remaining on the transfer surface 10a is dried, thereby transferring the transfer surface 10a to the transfer surface 10a. The phenomenon that the filmed toner T is damaged does not occur. Therefore, the quality of the image printed on the printing paper P passed between the transfer roller 15 and the fixing roller 16 through the transfer roller 15 while maintaining the state of the filmed toner T is maintained as it is. Will be improved.

Although the present invention has been described with reference to the accompanying drawings only for a limited embodiment, it should be understood that there can be further modifications within the spirit of the present invention for those skilled in the art.

According to the carrier drying apparatus for a wet printer of the present invention as described above, by indirectly heating the photosensitive belt using the heat generated from the heater, it is possible to effectively dry the liquid carrier while preventing the toner filmed on the transfer surface from being damaged. Can be.

In addition, since there is no component in contact with the photosensitive belt, the overload can be reduced during traveling of the photosensitive belt, thereby reducing the amount of power used.

Claims (2)

In the carrier drying apparatus for a wet printer for drying the liquid carrier remaining on the transfer surface of the photosensitive medium, A heater disposed close to the photosensitive medium to generate heat for drying the liquid carrier; And a heat transfer means for forcibly transferring the heat generated from the heater toward the photosensitive medium. The method of claim 1, wherein the heat transmitting means, A blowing fan installed close to the heater to forcibly blow the ambient air heated by the heater toward the photosensitive medium; And a guide member for guiding the air blown by the blower to move along the transfer surface of the photosensitive medium.