KR920007309B1 - Transcription dividing apparatus for electro-graphy processor - Google Patents

Transcription dividing apparatus for electro-graphy processor Download PDF

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Publication number
KR920007309B1
KR920007309B1 KR1019900007450A KR900007450A KR920007309B1 KR 920007309 B1 KR920007309 B1 KR 920007309B1 KR 1019900007450 A KR1019900007450 A KR 1019900007450A KR 900007450 A KR900007450 A KR 900007450A KR 920007309 B1 KR920007309 B1 KR 920007309B1
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South Korea
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photosensitive drum
transfer
light source
light
paper
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KR1019900007450A
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Korean (ko)
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KR910020518A (en
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이창수
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삼성전자 주식회사
정용문
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/24—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 whereby at least two steps are performed simultaneously
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer

Abstract

The apparatus transfers an image and divides a paper attacted on a head drum at the same time to protect the scattering of toner. The apparatus includes a photosensitive drum (10) coated with an organic compounds to transparent light beam, a light source (1) depositing inside of the drum to divide a paper, and a transcripter (3) for protecting the light source to affect on a transcript region.

Description

전자사진 프로세서의 전사분리장치Transfer Separation Device of Electrophotographic Processor

제1도는 종래의 전자사진 프로세서의 개략도.1 is a schematic diagram of a conventional electrophotographic processor.

제2도는 종래 전사 및 분리기의 확대사시도.2 is an enlarged perspective view of a conventional transfer and separator.

제3도는 본 발명의 전자사진 프로세서의 개략도.3 is a schematic diagram of an electrophotographic processor of the present invention.

제4도는 본 발명의 요부사시도.4 is a main portion of the present invention.

제5도는 본 발명의 작용상태도.5 is a functional state diagram of the present invention.

본 발명은 복사기, 레이저 프린터, 팩시밀리 등과 같은 전자사진 프로세서에 있어서 전사작업과 감광드럼에 밀착된 용지를 분리하는 과정을 동시에 일어날 수 있도록 한 장치에 관한 것이다. 대전기(25)의 코로나방전에 의해 감광드럼(photoconductor)(28)의 표면을 골고루 대전하고 감광드럼(28)의 회전에 의해 대전된 부분은 노광램프(exposure lamp)(22)의 광원에 의해 원고대(Platen glass)(21)상의 원고(Original)로부터반사된 빛으로 노광한다. 이 노광에 의해 4개의 거울(23)과 렌즈(24)에 의해 축배율등이 처리되어진 후 원고의 상(Image)과 같은 정전잠상(Electro-static latent image)이 감광드럼(28)위에 생성되며, 이때 이 생성된 잠상이 현상기(27)를 지나는 동안 토너(Toner)로 현상(develope)하여 가시상으로 변하게 되고 이어서 급지롤러(roller)(20)에 의해서 급지된 복사용지 위에 전사기(32)의 작용으로 감광드럼(28)상의 가시상을 복사용지(31)로 전사되게 한다. 이때 복사용지는 정전기력에 의해 감광드럼(28)에 밀착되어지며 분리기(33)는 이 밀착된 복사용지를 분리시켜 주는 역할을 수행한다. 그후 분리된 복사용지는 이송벨트에 의해 이송되어져 정착부의 히팅롤러(heating roller)와 압착로울러(pressure roller)사이로 배지트레이측으로 이송시켜 통과시키면 열과 압력에 의해 복사지면에 원고의 상이 정착되어 원하는 복사가 이루어진다. 한편 전사기(32)를 지난 드럼상에 잔여분의 토너와 잠상이 존재하게 되는데, 여기서 토너는 청소기(clearning blade)(29)에 의해 제거되며, 잠상은 잠상제거 램프(pre-erase lamp array)(37)에 의해 제거되도록 되어 있다.The present invention relates to an apparatus in which an electrophotographic processor such as a copy machine, a laser printer, a facsimile, or the like can simultaneously perform a process of separating a sheet adhered to a photosensitive drum. The portion of the photoconductor 28 is evenly charged by the corona discharge of the charger 25, and the portion charged by the rotation of the photosensitive drum 28 is driven by the light source of the exposure lamp 22. The light is reflected by the reflected light from the original on the platen glass 21. After this exposure, the axial magnification and the like are processed by the four mirrors 23 and the lens 24, an electro-static latent image such as an image of the original is generated on the photosensitive drum 28. At this time, the generated latent image develops into a visible image while developing with a toner while passing through the developing unit 27, and is then transferred onto the copy paper fed by the feeding roller 20. By the action of the visible image on the photosensitive drum 28 is transferred to the copy paper 31. At this time, the copy paper is in close contact with the photosensitive drum 28 by the electrostatic force and the separator 33 serves to separate the close contact with the copy paper. After that, the separated copy paper is transported by the conveying belt, and transferred to the output tray side between the heating roller and the pressure roller of the fixing unit. Is done. On the other hand, residual toner and latent image are present on the drum passing through the transfer machine 32, where the toner is removed by a cleaning blade 29, and the latent image is stored in a pre-erase lamp array ( 37) to be removed.

이와같은 작용을 하는 전자사진 프로세서에서 종래에는 제2도에 도시된 바와같이 감광드럼(28)의 하단에 전사기(32)와 분리기(33)가 하나의 쉴드(34)에 설치되어 작동하였다. 이 과정을 좀더 상세히 설명하면 감광드럼(28)에 형성된 정전잠상에 현상된 토너는 전사기(32)의 코로나 와이어(32a)에서 발생하는 고압의 코로나 방전에 의하여 강한 전계를 가지며 토너를 용지(31)에 옮기게 됨에 따라 용지(31)는 감광드럼(28)표면에 밀착된다.In the electrophotographic processor having such a function, a transfer machine 32 and a separator 33 are installed in one shield 34 at the bottom of the photosensitive drum 28 as shown in FIG. 2. In more detail, the toner developed on the electrostatic latent image formed on the photosensitive drum 28 has a strong electric field due to the high-voltage corona discharge generated from the corona wire 32a of the transfer machine 32, and the toner is applied to the paper 31. The sheet 31 is brought into close contact with the surface of the photosensitive drum 28 as it is transferred to the sheet.

이후 분리기(33)에서 코로나 와이어(33')가 고압의 코로나 방전에 의하여 전사 작용시와는 역극성을 갖는 고전압을 가하여 감광드럼과 용지 사이에 전사에 의해 형성된 전계를 약화시킨다. 이러한 상태로 용지(31)가 이동하면 용지가 감광드럼(28)을 따라 말려 올라가는 순간 용지 자체의 자중 및 탄력에 의해 감광드럼에서 분리된다.Thereafter, in the separator 33, the corona wire 33 'is subjected to a high voltage having reverse polarity when the corona discharge is transferred by the high pressure corona discharge, thereby weakening the electric field formed by the transfer between the photosensitive drum and the paper. When the paper 31 is moved in this state, the paper is separated from the photosensitive drum by the weight and elasticity of the paper itself as soon as the paper is rolled up along the photosensitive drum 28.

그러나 이와같은 종래의 장치는 전사기와 분리기가 서로 붙어 있으므로 분리기에서 발생하는 고압의 전계가 극성이 다른 전사기의 전사전압에 영향을 미치기 때문에 전사전압과 분리전압의 발랜스가 중요하게 되고 양호간 발랜스를 유지하더라도 분리시 발생하는 전계효과에 의해 토너가 비산되어 화질의 열화를 가져오게 되는 문제점이 있었다. 또한 용지가 분리기를 통과한 후에 분리기의 고압이 감광드럼의 표면에 영향을 미쳐 감광드럼의 수명을 단축시키는 문제점이 있었다.However, in the conventional apparatus, since the imprinter and the separator are attached to each other, the balance between the transfer voltage and the separation voltage becomes important because the high voltage generated in the separator affects the transfer voltage of the imprinter having different polarity. Even if the lance was maintained, the toner was scattered due to the electric field effect generated during separation, resulting in deterioration of image quality. In addition, after the paper passes through the separator, the high pressure of the separator affects the surface of the photosensitive drum, thereby reducing the life of the photosensitive drum.

본 발명은 상기와 같은 문제점을 해소하기 위하여 안출한 것으로서 전사와 분리가 동시에 일어나도록 하여 토너의 비산을 방지하여 복사화질을 향상토록 함에 목적이 있다.The present invention has been made in order to solve the above problems, and the object of the present invention is to improve the copy quality by preventing the toner from scattering by transferring and separating at the same time.

상기 목적을 수행하기 위한 실시예를 첨부된 도면에 의거 상세히 설명하면 다음과 같다. 감광드럼(10)의 표면 베이스(11)상에 유기화합물(12)은 코팅하여 광이 투과할 수 있도록 감광드럼(10)을 형성하고, 감광드럼 내부에 분리용광원(1)을 설치하며, 상기 광원(1)의 빛이 전사영역전에 영향을 미치지 위치하도록 전사기(3)를 설치하여서 된 것으로서 이때 사용되는 광원은 EL소자 또는 LED어레이를 사용한다.An embodiment for carrying out the above object will be described in detail with reference to the accompanying drawings. The organic compound 12 is coated on the surface base 11 of the photosensitive drum 10 to form a photosensitive drum 10 to allow light to pass therethrough, and a separation light source 1 is installed inside the photosensitive drum. The transfer device 3 is provided so that the light of the light source 1 does not affect the transfer area. The light source used here uses an EL element or an LED array.

이와같이 구성된 본 발명의 작용효과는 우선 복사작업을 수행하기 위하여 대전기(25)의 코로나 방전에 의해 감광드럼(photoconductor)(28)의 표면을 골고루 대전하고 감광드럼(28)의 회전에 의해 대전된 부분은 노광램프(exposure lamp)(22)의 광원에 의해 원고대(Platen glass)(21)상의 원고(Original)로부터 반사된 빛으로 노광한다.The operating effect of the present invention configured as described above is first evenly charged on the surface of the photoconductor 28 by the corona discharge of the charger 25 and charged by the rotation of the photosensitive drum 28 in order to perform the radiation operation. The part is exposed by the light reflected from the original on the platen glass 21 by the light source of the exposure lamp 22.

이 노광에 의해 4개의 거울(23)과 렌즈(24)에 의해 축배율등이 처리되어진 후 원고의 상(Image)과 같은 정전잠상(Electro-static Latent image)이 감광드럼(28)위에 생성되며, 이때 이 생성된 잠상이 현상기(27)를 지나는 동안 토너(Toner)로 현상(develope)하여 가시상으로 변하게 되고 이어서 급지롤러(roller)(20)에 의해서 급지된 복사용지 위에 전사기(32)의 작용으로 감광드럼(28)상의 가시상을 복사용지(31)로 전사되게 한다.After this exposure, the axial magnification and the like are processed by the four mirrors 23 and the lens 24, an electro-static latent image such as an image of the original is generated on the photosensitive drum 28. At this time, the generated latent image develops into a visible image while developing with a toner while passing through the developing unit 27, and is then transferred onto the copy paper fed by the feeding roller 20. By the action of the visible image on the photosensitive drum 28 is transferred to the copy paper 31.

이때 감광드럼(10)이 "-"로 대전되었을 경우 "+"전하를 갖는 토너(9)가 감광드럼(10)의 표면에 옮겨 붙게 되며 이후 전사기(3)의 코로나 와이어(5)가 고압의 전사전압을 걸어주게 됨에 따라 토너(9)는 용지(31)측으로 옮겨 붙게 된다. 즉 전사가 이루어진다.At this time, when the photosensitive drum 10 is charged with "-", the toner 9 having a "+" charge is transferred to the surface of the photosensitive drum 10, and then the corona wire 5 of the transfer machine 3 has a high pressure. As the transfer voltage of the toner 9 is applied, the toner 9 is transferred to the paper 31 side. That is, the transcription is made.

이때 감광드럼(10) 내부에 설치된 광원(1)이 빛을 발함에 따라 감광드럼(10)의 표면에 대전 부하를 노광시키게 되어 드럼 표면의 베이스(11)를 통하여 유전체(12)의 전하입자가 빠져 나간다.At this time, as the light source 1 installed inside the photosensitive drum 10 emits light, the charging load is exposed on the surface of the photosensitive drum 10 so that the charge particles of the dielectric 12 are transferred through the base 11 of the drum surface. Exit

이때 차폐판(2)은 광원(1)에서 발하는 빛이 전사위치에 영향을 미치지 않도록 차단하는 역할을 하며 차폐판의 측벽(2')이 전사코로나 와이어(5)의 직상방에 위치하는것이 바람직하다.In this case, the shielding plate 2 serves to block the light emitted from the light source 1 from affecting the transfer position, and the side wall 2 'of the shielding plate is preferably located above the transfer corona wire 5. Do.

이때 전사코로나 와이어(5)에서 발생하는 전사전압에 의해 토너(9)와 베이스(11)사이에 작동하는 정전인력은 0가 된다. 따라서 용지(31)는 자중에 의해 감광드럼(10)으로부터 분리되며 이때 용지 자체의 탄성도 중요한 역할을 수행한다.At this time, due to the transfer voltage generated by the transfer corona wire 5, the electrostatic attraction operating between the toner 9 and the base 11 becomes zero. Therefore, the sheet 31 is separated from the photosensitive drum 10 by its own weight, and the elasticity of the sheet itself also plays an important role.

상기한 바와 같이 본 발명에 의하면 전사와 분리가 동시에 수행되므로 토너의 비산을 방지하여 화질을 향상시키게 된다.As described above, according to the present invention, the transfer and separation are performed at the same time, thereby preventing the toner from scattering and improving the image quality.

Claims (3)

전자사진 프로세서에 있어서, 감광드럼(10)의 표면 베이스(11)상에 유기화합물(12)를 코팅하여 광이 투과할 수 있도록 감광드럼(10)을 형성하고, 감광드럼 내부에 분리용광원(1)을 설치하며, 상기 광원(1)의 빛이 전사영역 전에 영향을 미치지 위치하도록 전사기(3)를 설치하여서 된 것을 특징으로 하는 전자사진 프로세서의 전사분리장치.In the electrophotographic processor, the organic compound 12 is coated on the surface base 11 of the photosensitive drum 10 to form a photosensitive drum 10 to allow light to pass therethrough, and a light source for separation within the photosensitive drum. 1) and a transfer machine (3) so as to be positioned so that the light of the light source (1) affects before the transfer area. 제1항에 있어서, 광원(1)은 EL소자, 또는 LED에레이를 사용함을 특징으로 하는 전자사진 프로세서의 전사분리장치.The transfer separation device according to claim 1, wherein the light source (1) uses an EL element or an LED array. 제1항에 있어서, 광원(1)의 빛이 전사영역에 영향을 미치지 않도록 차폐판(2)의 측벽(2')이 전사코로나 와이어(5) 직상부에 위치함을 특징으로 하는 전사진 프로세서의 전사분리장치.The transfer processor according to claim 1, wherein the side wall 2 'of the shielding plate 2 is located directly above the transfer corona wire 5 so that the light of the light source 1 does not affect the transfer area. Transfer separation device.
KR1019900007450A 1990-05-23 1990-05-23 Transcription dividing apparatus for electro-graphy processor KR920007309B1 (en)

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KR920007309B1 true KR920007309B1 (en) 1992-08-29

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