KR100370189B1 - Image transfer unit for liquid electrophotographic printer - Google Patents
Image transfer unit for liquid electrophotographic printer Download PDFInfo
- Publication number
- KR100370189B1 KR100370189B1 KR10-1999-0009828A KR19990009828A KR100370189B1 KR 100370189 B1 KR100370189 B1 KR 100370189B1 KR 19990009828 A KR19990009828 A KR 19990009828A KR 100370189 B1 KR100370189 B1 KR 100370189B1
- Authority
- KR
- South Korea
- Prior art keywords
- transfer roller
- paper
- photosensitive belt
- roller
- transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/007—Conveyor belts or like feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
- B41J15/048—Conveyor belts or like feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/0057—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material where an intermediate transfer member receives the ink before transferring it on the printing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/05—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers produced by the application of heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
- B41J2/072—Ink jet characterised by jet control by thermal compensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14161—Structure having belt or drum with holes filled with ink
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
개시된 습식 전자사진방식 프린터의 전사유닛은, 감광벨트와 접촉되어 회전하면서 그 감광벨트 위에 소정 화상을 형성하고 있는 토너입자를 전사받아 용지에 인쇄하는 전사롤러와, 전사롤러와 맞물려 회전하면서 그 사이로 통과되는 용지를 전사롤러 측으로 가압함으로써 토너입자를 용지에 정착시키는 정착롤러와, 전사롤러와 감광벨트의 접촉점 입측에 설치되어 그 접촉점으로 진입되려는 전사롤러의 외주면을 가열하는 가열수단이 구비된 것을 특징으로 한다. 이와 같은 구성에 따르면, 전사롤러를 국부적으로 가열 및 냉각시키면서 토너입자의 점착력을 적절히 변화시켜 화상의 전사를 원활하게 수행할 수 있으며, 종래에 토너입자가 잘 옮겨지지 않아 용지가 전사롤러에 달라붙어서 말려버리는 현상도 방지된다.The transfer unit of the disclosed wet electrophotographic printer has a transfer roller for transferring a toner particle that forms a predetermined image on the photosensitive belt while rotating in contact with the photosensitive belt and printing it on paper, and interlocking with the transfer roller to rotate therebetween. And a fixing means for fixing the toner particles to the paper by pressing the paper to the transfer roller side, and a heating means installed at the contact point of the contact point between the transfer roller and the photosensitive belt to heat the outer circumferential surface of the transfer roller to enter the contact point. do. According to this configuration, the transfer roller can be smoothly transferred by appropriately changing the adhesive force of the toner particles while locally heating and cooling the transfer roller. Drying is also prevented.
Description
본 발명은 습식 전자사진방식 프린터의 전사유닛에 관한 것으로서, 특히 전사롤러에 대한 토너의 점착력을 가변시킬 수 있도록 개선된 습식 전자사진방식 프린터의 전사유닛에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer unit of a wet electrophotographic printer, and more particularly, to a transfer unit of a wet electrophotographic printer improved to vary the adhesion of toner to a transfer roller.
일반적으로 칼라 레이저 프린터와 같은 습식 전자사진방식 프린터에 있어서는, 도 1에 도시된 바와 같이, 감광벨트(10)에 레이저를 주사하여 현상할 화상의 정전잠상을 형성하는 레이저 스캐닝 유닛(50)과, 액상의 용매와 분말상의 토너가 혼합된 현상액을 사용하여 상기 정전잠상을 소정 화상으로 현상하는 현상유닛(20)과, 현상 후 상기 화상내에 잔존하는 액상의 용매를 건조시켜 제거하는 건조유닛(30)과, 상기 감광벨트(10)에 현상된 이미지를 용지(S)에 인쇄하는 전사유닛(40)이 구비되어 있다.In general, in a wet electrophotographic printer such as a color laser printer, as shown in FIG. 1, a laser scanning unit 50 for scanning a laser on the photosensitive belt 10 to form an electrostatic latent image of an image to be developed; A developing unit 20 for developing the electrostatic latent image into a predetermined image using a developing solution in which a liquid solvent and powdery toner are mixed, and a drying unit 30 for drying and removing the liquid solvent remaining in the image after development. And, the transfer unit 40 for printing the image developed on the photosensitive belt 10 on the paper (S) is provided.
여기서 상기 전사유닛(40)은 상기 감광벨트(10)로부터 화상을 전사받아 용지(S)에 인쇄하는 전사롤러(41)와, 이 전사롤러(41)와 맞물려 회전하면서 용지(S)를 전사롤러(41) 측으로 가압하여 화상을 정착시키는 정착롤러(42)를 포함하고 있다. 그리고 이 전사롤러(41)와 정착롤러(42) 각각의 내부에는 히터(미도시)가 내장되어 있어서, 그 외주면을 소정 온도로 균일하게 가열 유지하도록 되어 있다. 이는, 도 2의 그래프에 도시된 바와 같이 전사롤러(41)에 대한 토너입자의 점착력이 온도의 증가에 따라 계속 증가하는 경향을 나타내기 때문에, 감광벨트(10)로부터 전사롤러(41)로 토너입자가 잘 전사되도록 하기 위해 그 외주면을 소정 온도로 가열 유지하는 것이다. 참조부호 61은 전사롤러(41)를 클리닝하기 위한 클리닝롤러를 나타내며, 참조부호 63은 용지(S)의 선단부가 전사롤러(41)나 정착롤러(42) 측으로 말려들어가지 않도록 가이드하는 디태치 브러쉬(detach brush)를, 그리고 참조부호 42는 인쇄된 용지(S)를 계속 이송시키기 위한 이송롤러를 나타낸다.Here, the transfer unit 40 transfers the image S from the photosensitive belt 10 and prints the paper on the paper S, and the transfer roller 41 is rotated in engagement with the transfer roller 41. And a fixing roller 42 which presses to the 41 side to fix the image. A heater (not shown) is built into each of the transfer roller 41 and the fixing roller 42, so that the outer circumferential surface thereof is uniformly heated to a predetermined temperature. This is because the adhesion of the toner particles to the transfer roller 41 tends to increase as the temperature increases, as shown in the graph of FIG. 2, so that the toner is transferred from the photosensitive belt 10 to the transfer roller 41. The outer circumferential surface is heated and maintained at a predetermined temperature so that the particles are well transferred. Reference numeral 61 denotes a cleaning roller for cleaning the transfer roller 41, and reference numeral 63 denotes a detach brush for guiding the leading end of the paper S not to be rolled toward the transfer roller 41 or the fixing roller 42 side. (detach brush), and reference numeral 42 denotes a conveying roller for continuously conveying the printed sheet (S).
상기 구성에 있어서 인쇄가 진행되면, 상기 감광벨트(10)에 현상된 화상이 상기 전사롤러(41)에 일단 옮겨진 후 상기 정착롤러(42)와의 사이로 통과되는 용지(S)에 다시 찍혀나가게 된다. 따라서 인쇄가 원활하게 진행되기 위해서는, 상기 감광벨트(10)에 화상을 형성하고 있는 토너입자가 상기 전사롤러(41)로 쉽게 옮겨질 수 있어야 하고, 또한 이어서 상기 용지(S)로도 쉽게 옮겨갈 수 있어야 한다. 만일 토너입자가 원활하게 옮겨가지 못하게 되면 용지에 선명한 화질의 화상이 찍히지 못하게 된다. 이는 토너입자의 전사롤러(41)에 대한 점착력이 감광벨트(10)에 대한 것보다 작을 경우에 발생할 수 있고, 또한 전사롤러(41)에 대한 토너입자의 점착력이 상기 용지(S)에 대한 것보다 클 경우에도 발생할 수 있다. 따라서 이러한 점착력 세기의 순서가 맞지 않을 경우에는 토너의 전사가 원활하게 이루어지지 않아 화상이 깨끗하지 않게 되고, 또한 용지(S)가 전사롤러(41)에 달라붙어 말려버리는 치명적인 오류가 발생할 수도 있다. 그런데 상기와 같은 기존의 구성에서는 전사롤러(41) 전체를 그 내부에 내장된 히터로 균일하게 가열하고 있기 때문에, 너무 낮은 온도로 가열하면 감광벨트(10)로부터 전사롤러(41)로 전사가 잘 되지 않고, 반대로 너무 높게 가열하면 전사롤러(41)에서 용지(S)로 전사가 잘 되지 않아, 그 적정한 구간을 찾기가 어려운 문제점이 있다.When the printing proceeds in the above configuration, the image developed on the photosensitive belt 10 is once moved to the transfer roller 41 and then reprinted on the paper S passed between the fixing roller 42. Therefore, in order for the printing to proceed smoothly, the toner particles forming the image on the photosensitive belt 10 should be able to be easily transferred to the transfer roller 41, and then to the paper S. Should be If the toner particles do not move smoothly, the image of the vivid image may not be captured. This may occur when the adhesion of the toner particles to the transfer roller 41 is less than that of the photosensitive belt 10, and the adhesion of the toner particles to the transfer roller 41 is to the paper S. It can also occur if greater. Therefore, when the order of the adhesive strength is not correct, the image of the toner may not be smoothly transferred and the image may not be clean, and a fatal error may occur in which the paper S sticks to the transfer roller 41 and rolls up. However, in the conventional configuration as described above, since the entire transfer roller 41 is uniformly heated by a heater built therein, when transferred to a too low temperature, transfer from the photosensitive belt 10 to the transfer roller 41 is well performed. On the contrary, if it is heated too high, the transfer from the transfer roller 41 to the paper S does not work well, so that it is difficult to find an appropriate section.
본 발명은 상기의 점을 감안하여 창출된 것으로서, 전사롤러에 대한 토너의 점착력을 부분적으로 변화시킬 수 있도록 개선된 습식 전자사진방식 프린터의 전사유닛을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and an object thereof is to provide a transfer unit of a wet electrophotographic printer improved to partially change the adhesive force of the toner to the transfer roller.
도 1은 종래 습식 전자사진방식 프린터의 전사유닛을 개략적으로 도시한 도면,1 is a view schematically showing a transfer unit of a conventional wet electrophotographic printer;
도 2는 전사롤러에 대한 토너입자의 점착력과 온도와의 관계를 나타낸 그래프,2 is a graph showing the relationship between the adhesive force of the toner particles and the temperature to the transfer roller;
도 3은 본 발명에 따른 습식 전자사진방식 프린터의 전사유닛을 도시한 도면,3 is a view showing a transfer unit of a wet electrophotographic printer according to the present invention;
도 4는 도 3에 도시된 전사유닛 중 가열수단의 변형가능한 예를 보인 도면.4 is a view showing a deformable example of the heating means of the transfer unit shown in FIG.
< 도면의 주요부분에 대한 부호의 설명 ><Description of Symbols for Major Parts of Drawings>
100...감광벨트 210...전사롤러100 ... Photosensitive belt 210 ... Transfer roller
220...정착롤러 310...열선부220 ... settling roller 310 ... heating unit
320...반사미러 400...냉각용 롤러320 ... reflective mirror 400 ... cooling roller
S...용지S ... paper
상기의 목적을 달성하기 위한 본 발명은, 감광벨트와 접촉되어 회전하면서 그 감광벨트 위에 소정 화상을 형성하고 있는 토너입자를 전사받아 용지에 인쇄하는 전사롤러와, 상기 전사롤러와 맞물려 회전하면서 그 사이로 통과되는 용지를 상기 전사롤러 측으로 가압함으로써 상기 토너입자를 용지에 정착시키는 정착롤러를 포함하는 습식 전자사진방식 프린터의 전사유닛에 있어서, 상기 전사롤러와 감광벨트의 접촉점 입측에 설치되어 그 접촉점으로 진입되려는 전사롤러의 외주면을 가열하는 가열수단이 구비된 것을 특징으로 한다. 그리고, 상기 전사롤러와 감광벨트의 접촉점 출측에는 상기 감광벨트로부터 전사된 토너입자가 용지에 인쇄되기 전에 그 전사롤러의 전사된 부위를 냉각시키는 냉각수단이 더 구비되는 것이 바람직하다.In order to achieve the above object, the present invention provides a transfer roller which transfers and prints a toner particle that forms a predetermined image on the photosensitive belt while rotating in contact with the photosensitive belt, and prints on paper, and rotates while interlocking with the transfer roller. A transfer unit of a wet electrophotographic printer comprising a fixing roller for fixing the toner particles to a paper by pressing a sheet of paper passing through the transfer roller, wherein the transfer roller and the photosensitive belt are provided at the contact point and enter the contact point. It is characterized in that the heating means for heating the outer peripheral surface of the transfer roller to be provided. Further, it is preferable that cooling means for cooling the transferred portion of the transfer roller is further provided at the contact point exit side of the transfer roller and the photosensitive belt before the toner particles transferred from the photosensitive belt are printed on the paper.
이하 첨부된 도면을 참조하면서 본 발명에 따른 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 3은 본 발명에 따른 습식 전자사진방식 프린터의 전사유닛을 나타낸 것이다. 도면을 참조하면, 화상이 현상되는 감광벨트(100)에 전사롤러(210)가 접촉되어 회전하게 되며, 이 전사롤러(210)에는 정착롤러(220)가 밀착되어 함께 회전한다. 인쇄할 용지(S)는 상기 전사롤러(210)와 정착롤러(220)의 사이를 통과하게 되며, 이때 상기 감광벨트(100)와 전사롤러(210)를 경유하여 용지(S)에 화상이 찍히게 된다. 참조부호 250은 전사롤러(210)를 클리닝하기 위한 클리닝롤러를 나타내며, 참조부호 230은 용지(S)의 선단부가 전사롤러(210)나 정착롤러(220) 측으로 말려들어가지 않도록 가이드하는 디태치 브러쉬(detach brush)를, 그리고 참조부호 240은 인쇄된 용지(S)를 계속 이송시키기 위한 이송롤러를 나타낸다.3 shows a transfer unit of a wet electrophotographic printer according to the present invention. Referring to the drawings, the transfer roller 210 is in contact with the photosensitive belt 100, the image is developed to rotate, the fixing roller 220 is in close contact with the transfer roller 210 to rotate together. The paper S to be printed passes between the transfer roller 210 and the fixing roller 220, and at this time, the image is taken on the paper S via the photosensitive belt 100 and the transfer roller 210. do. Reference numeral 250 denotes a cleaning roller for cleaning the transfer roller 210, and reference numeral 230 denotes a detaching brush for guiding the leading end of the paper S not to be rolled toward the transfer roller 210 or the fixing roller 220 side. Detach brush, and reference numeral 240 denotes a conveying roller for continuously conveying the printed sheet (S).
한편 상기 전사롤러(210)와 감광벨트(100)가 접촉되는 접촉점(P)의 입측에는 열선부(310)와 반사미러(320)를 포함한 가열수단(300)이 설치되어 있다. 이 가열수단(300)은 클리닝롤러(250)용 브라켓(251)에 결합된 아암(252)에 지지되어서 상기 전사롤러(210)의 입측을 가열하도록 배치되어 있다. 이는 종래와 같이 전사롤러(210) 내부에 히터를 장착한 것이 아니라, 외부에서 외주면 일부를 가열하도록 가열수단을 설치한 것이다. 따라서, 상기 감광벨트(100)로부터 토너입자를 전사받기 직전 즉, 감광벨트(100)와 전사롤러(210)의 접촉점(P) 직전의 전사롤러(210) 외주부가 상기 가열수단(300)에 의해 가열된다. 이는 전술한 도 2의 그래프에 도시된 바와 같이 온도가 증가할수록 전사롤러(210)에 토너입자가 달라붙으려는 점착력이 강해지기 때문에, 접촉점(P) 전에 전사롤러(210)의 국부적인 부위를 가열함으로써 감광벨트(100)로부터 전사가 원활하게 이루어지도록 하는 것이다.On the other hand, the heating means 300 including the heating wire 310 and the reflecting mirror 320 is provided at the inlet side of the contact point (P) that the transfer roller 210 and the photosensitive belt 100 is in contact. The heating means 300 is supported by the arm 252 coupled to the bracket 251 for the cleaning roller 250 and is arranged to heat the mouth side of the transfer roller 210. This is not equipped with a heater in the transfer roller 210 as in the prior art, it is provided with a heating means to heat a portion of the outer peripheral surface from the outside. Therefore, the outer peripheral portion of the transfer roller 210 immediately before the transfer of the toner particles from the photosensitive belt 100, that is, immediately before the contact point P of the photosensitive belt 100 and the transfer roller 210, is carried out by the heating means 300. Heated. This is because, as shown in the graph of FIG. 2 described above, the adhesive force to adhere toner particles to the transfer roller 210 becomes stronger as the temperature increases, so that the local portion of the transfer roller 210 is heated before the contact point P. FIG. This is to facilitate the transfer from the photosensitive belt 100.
한편, 본 발명의 전사유닛에 있어서는 전사롤러(210) 내부에 별도의 히터가 없고 상기 가열수단에 의해 국부적인 일측 부위만 가열되기 때문에, 일단 접촉점(P)을 지나고 나면 용지(S)에 접촉되기 전까지는 자연스럽게 공냉이 이루어지게 된다. 따라서 전사롤러(210) 외주면의 온도가 차츰 떨어지게 되어 도 2의 그래프에 도시된 바와 같이 점착력도 상대적으로 약해지게 된다. 따라서 용지(S)에 접촉하게 될 때에는 어느 정도 점착력이 약해진 상태가 되므로 용지(S)로의 전사가 잘 이루어질 수 있다. 그러나 본 발명에서는 이와 같은 공냉 방식보다 냉각효율을 높여 용지(S)로 토너입자가 더 잘 옮겨갈 수 있도록 하기 위해 별도의 냉각용 롤러(400)를 냉각수단으로 설치하였다. 즉, 이 냉각용 롤러(400)가 상기 전사롤러(210)와 접촉되어 회전하면서 열교환을 수행하여 온도를 낮추게 된다. 상기 냉각용 롤러(400)로는 열전도율이 좋은 금속롤러가 바람직하다.On the other hand, in the transfer unit of the present invention, since there is no separate heater inside the transfer roller 210, and only one local part is heated by the heating means, once the contact point P has passed, the paper S is contacted. Until then, naturally air cooling is achieved. Accordingly, the temperature of the outer circumferential surface of the transfer roller 210 gradually drops, so that the adhesive force is relatively weakened as shown in the graph of FIG. 2. Therefore, the adhesive force is weakened to some extent when it comes in contact with the paper (S) can be transferred to the paper (S) well. However, in the present invention, a separate cooling roller 400 is installed as a cooling means in order to increase the cooling efficiency than the air cooling method so that the toner particles can be transferred to the paper S better. That is, the cooling roller 400 lowers the temperature by performing heat exchange while rotating in contact with the transfer roller 210. As the cooling roller 400, a metal roller having good thermal conductivity is preferable.
따라서 인쇄작업이 진행되면, 상기 열선부(310)와 반사미러(320)에 의해 가열된 전사롤러(210)가 감광벨트(100)와 접촉되면서 토너입자를 전사받게 되고, 계속해서 상기 냉각용 롤러(400)에 의해 냉각된 후 용지(S)에 그 토너입자를 전사하게 된다.Therefore, when the printing operation is performed, the transfer roller 210 heated by the heating wire 310 and the reflection mirror 320 is in contact with the photosensitive belt 100 to receive the toner particles, and subsequently the cooling roller. After cooling by 400, the toner particles are transferred onto the paper S. FIG.
이와 같이 전사롤러(210)의 외주면을 국부적으로 가열했다가 냉각시키면서 토너입자의 점착력을 변화시킴으로써, 감광벨트(100)로부터 전사롤러(210)를 거쳐 용지(S)에 이르기까지 토너입자가 원활하게 옮겨갈 수 있게 된다.By changing the adhesive force of the toner particles while heating and cooling the outer circumferential surface of the transfer roller 210 in this manner, the toner particles smoothly from the photosensitive belt 100 to the paper S through the transfer roller 210. You can move it.
한편, 본 실시예에서는 상기한 가열수단으로서 열선부(310)와 반사미러(320)를 구비한 비접촉식 가열수단을 개시하였으나, 이를 도 4에 도시된 바와 같이 히터(310')가 내장된 히팅롤러(320')로 구성할 수도 있다.On the other hand, in the present embodiment has disclosed a non-contact heating means having a heating wire 310 and a reflecting mirror 320 as the heating means, as shown in Figure 4, a heating roller with a built-in heater 310 ' Or 320 '.
상술한 바와 같이 본 발명에 따른 습식 전자사진방식 프린터의 전사유닛은, 전사롤러를 국부적으로 가열 및 냉각시킴으로써 토너입자의 점착력을 변화시켜 화상이 원활하게 전사되어 나갈 수 있도록 하는 장점을 가지며, 따라서 종래에 토너입자가 잘 옮겨지지 않아 용지가 전사롤러에 달라붙어서 말려버리는 현상도 방지된다.As described above, the transfer unit of the wet electrophotographic printer according to the present invention has the advantage of changing the adhesive force of the toner particles by locally heating and cooling the transfer roller so that the image can be transferred smoothly, and thus the conventional Toner particles are hard to move, preventing the paper from sticking to the transfer roller and curling.
본 발명은 상기에 설명되고 도면에 예시된 것에 의해 한정되는 것은 아니며, 다음에 기재되는 청구의 범위 내에서 더 많은 변형 및 변용예가 가능한 것임은 물론이다.It is to be understood that the invention is not limited to that described above and illustrated in the drawings, and that more modifications and variations are possible within the scope of the following claims.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0009828A KR100370189B1 (en) | 1999-03-23 | 1999-03-23 | Image transfer unit for liquid electrophotographic printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0009828A KR100370189B1 (en) | 1999-03-23 | 1999-03-23 | Image transfer unit for liquid electrophotographic printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000061051A KR20000061051A (en) | 2000-10-16 |
| KR100370189B1 true KR100370189B1 (en) | 2003-01-29 |
Family
ID=19577397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-1999-0009828A Expired - Fee Related KR100370189B1 (en) | 1999-03-23 | 1999-03-23 | Image transfer unit for liquid electrophotographic printer |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100370189B1 (en) |
-
1999
- 1999-03-23 KR KR10-1999-0009828A patent/KR100370189B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000061051A (en) | 2000-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4498369B2 (en) | Image heating apparatus and flexible sleeve used in the image heating apparatus | |
| JP2007249186A5 (en) | ||
| US20100098468A1 (en) | Fusing device and image forming apparatus employing the same | |
| EP0860752B1 (en) | Image forming apparatus having a fixing apparatus | |
| JPH10319754A (en) | Fixing device | |
| JP3282257B2 (en) | Fixing device | |
| JPH11149230A (en) | Image formation device | |
| KR100370189B1 (en) | Image transfer unit for liquid electrophotographic printer | |
| JP3695343B2 (en) | Fixing apparatus and fixing method | |
| JPS6214675A (en) | Heat fixing mechanism | |
| JPH09190112A (en) | Fixing device and image forming device | |
| JPH09237013A (en) | Image forming method | |
| JPH0887194A (en) | Fixing device | |
| JP2001282033A (en) | Fixing device and image forming device | |
| JP2003091198A (en) | Image forming apparatus | |
| JP2000122463A (en) | Fixing device | |
| JP2007171318A (en) | Fixing apparatus and image forming apparatus | |
| JPH1152768A (en) | Fixing device | |
| JP2000181277A (en) | Image forming apparatus and heat fixing apparatus | |
| JP4280386B2 (en) | Image forming apparatus | |
| JP2001265159A (en) | Fixing machine and image forming device equipped with the same | |
| KR200368020Y1 (en) | Apparatus for preventing paper is caught in a fixing | |
| JP2957487B2 (en) | Fixing device | |
| JPH01269970A (en) | Fixing device | |
| JP2001209266A (en) | Fixing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19990323 |
|
| A201 | Request for examination | ||
| PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 20000925 Comment text: Request for Examination of Application Patent event code: PA02011R01I Patent event date: 19990323 Comment text: Patent Application |
|
| PG1501 | Laying open of application | ||
| E902 | Notification of reason for refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 20020620 Patent event code: PE09021S01D |
|
| E701 | Decision to grant or registration of patent right | ||
| PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 20021224 |
|
| GRNT | Written decision to grant | ||
| PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 20030116 Patent event code: PR07011E01D |
|
| PR1002 | Payment of registration fee |
Payment date: 20030117 End annual number: 3 Start annual number: 1 |
|
| PG1601 | Publication of registration | ||
| PR1001 | Payment of annual fee |
Payment date: 20051227 Start annual number: 4 End annual number: 4 |
|
| PR1001 | Payment of annual fee |
Payment date: 20061227 Start annual number: 5 End annual number: 5 |
|
| PR1001 | Payment of annual fee |
Payment date: 20071221 Start annual number: 6 End annual number: 6 |
|
| PR1001 | Payment of annual fee |
Payment date: 20081224 Start annual number: 7 End annual number: 7 |
|
| PR1001 | Payment of annual fee |
Payment date: 20091224 Start annual number: 8 End annual number: 8 |
|
| PR1001 | Payment of annual fee |
Payment date: 20101230 Start annual number: 9 End annual number: 9 |
|
| PR1001 | Payment of annual fee |
Payment date: 20111226 Start annual number: 10 End annual number: 10 |
|
| FPAY | Annual fee payment |
Payment date: 20121228 Year of fee payment: 11 |
|
| PR1001 | Payment of annual fee |
Payment date: 20121228 Start annual number: 11 End annual number: 11 |
|
| FPAY | Annual fee payment |
Payment date: 20131230 Year of fee payment: 12 |
|
| PR1001 | Payment of annual fee |
Payment date: 20131230 Start annual number: 12 End annual number: 12 |
|
| LAPS | Lapse due to unpaid annual fee | ||
| PC1903 | Unpaid annual fee |
Termination category: Default of registration fee Termination date: 20151209 |