KR20000074324A - Apparatus for printing both sides of paper of electrnic photograph processor - Google Patents
Apparatus for printing both sides of paper of electrnic photograph processor Download PDFInfo
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- KR20000074324A KR20000074324A KR1019990018169A KR19990018169A KR20000074324A KR 20000074324 A KR20000074324 A KR 20000074324A KR 1019990018169 A KR1019990018169 A KR 1019990018169A KR 19990018169 A KR19990018169 A KR 19990018169A KR 20000074324 A KR20000074324 A KR 20000074324A
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- paper
- roller
- printing
- feed
- reversing
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- 238000007599 discharging Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims 3
- 208000028659 discharge Diseases 0.000 description 17
- 238000001514 detection method Methods 0.000 description 11
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
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- 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
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
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- 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
- B41J11/0045—Guides for printing material
- B41J11/005—Guides in the printing zone, e.g. guides for preventing contact of conveyed sheets with printhead
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- 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
- B41J11/22—Paper-carriage guides or races
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- 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
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
- B41J13/0045—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material concerning sheet refeed sections of automatic paper handling systems, e.g. intermediate stackers
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- 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
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/02—Rollers
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- 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
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/02—Rollers
- B41J13/025—Special roller holding or lifting means, e.g. for temporarily raising one roller of a pair of nipping rollers for inserting printing material
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- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/325—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet
- B41J2/33—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet from ink roller
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- 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
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
Abstract
Description
본 발명은 전자사진 프로세서의 양면인쇄 장치에 관한 것으로, 특히 복수개의 용지반전구조를 구비하도록 함으로써 용지의 양면인쇄의 효율을 극대화시킨 전자사진 프로세서의 양면인쇄 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duplex printing apparatus of an electrophotographic processor, and more particularly, to a duplex printing apparatus of an electrophotographic processor that maximizes the efficiency of duplex printing of paper by providing a plurality of sheet inversion structures.
종래 기술에 의한 전자사진 프로세서의 양면인쇄 장치의 일례를 도 1을 참조하여 설명한다.An example of a duplex printing apparatus of a conventional electrophotographic processor will be described with reference to FIG.
종래 전자사진 프로세서의 양면인쇄 장치의 구성은 기기 본체(1)의 내부에 용지가 적재된 급지카세트(2)와 용지를 낱장씩 공급하기 위한 픽업롤러(3) 및 픽업된 용지의 선단을 정렬하기 위한 레지스터롤러(4)가 설치되어 있고, 이송된 용지에 화상을 형성하기 위한 화상형성장치(5)가 설치되어 있으며, 화상형성장치의 감광드럼(5a)과 대응되어 전사롤러(6)가 설치되어 있고, 전사롤러(6)의 전방에는 화상형성장치에서 정전잠상에 의해 형성된 화상을 정착시키는 정착롤러(7)가 설치되어 있으며, 인쇄가 종료된 용지를 배출하는 배지롤러(8)가 배지대(9)측으로 설치되어 있다.The conventional duplex printing apparatus of the electrophotographic processor is to align the feed cassette (2) with paper loaded inside the main body (1), the pickup roller (3) for feeding sheets of paper, and the leading end of the picked paper. Register rollers 4 are provided, and an image forming apparatus 5 for forming an image on the conveyed paper is provided, and a transfer roller 6 is provided in correspondence with the photosensitive drum 5a of the image forming apparatus. In front of the transfer roller 6, there is provided a fixing roller 7 for fixing an image formed by an electrostatic latent image in the image forming apparatus, and a discharge roller 8 for discharging the paper on which the printing is finished. It is installed in the (9) side.
용지의 이송경로상에는 아이들 롤러(10)가 구비되어 있고, 용지의 진행상태를 반전시키는 용지반전부(11) 반전롤러(12)와, 반전된 용지를 다시 레지스터롤러(4)측으로 이송시키는 다수개의 이송롤러(13,14,15)가 설치되어 있다.An idle roller 10 is provided on the conveyance path of the paper, and the inverting roller 12 of the paper inverting portion 11 for inverting the advancing state of the paper and a plurality of the papers for conveying the inverted paper back to the register roller 4 side. Feed rollers 13, 14 and 15 are provided.
미설명 부호 16,17,18,19는 위치검출센서이다.Reference numerals 16, 17, 18, and 19 are position detection sensors.
이와 같이 구성되어 있는 종래 기술에 의한 인쇄동작을 설명한다.The printing operation by the prior art which is comprised in this way is demonstrated.
용지가 픽업롤러(3)에 의해 급지되면 용지는 레지스터롤러(4)에 의해서 선단이 정렬되어 화상형성장치(5)로 이송된다. 이송된 용지는 정전잠상에 의해서 화상이 형성되어 정착롤러(7)로 이송되고, 히팅롤러와 압착롤러로 구성된 정착롤러(7)에서 화상이 정착된다. 이후 용지의 단면인쇄모드인 경우에는 배지롤러(8)를 통해 배지대(9)로 배출된다.When the sheet is fed by the pickup roller 3, the sheet is fed to the image forming apparatus 5 with the tip aligned by the register roller 4. The conveyed paper is formed by an electrostatic latent image and conveyed to the fixing roller 7, and the image is fixed by the fixing roller 7 composed of the heating roller and the pressing roller. Then, in the single-sided printing mode of the paper is discharged to the discharge stage 9 through the discharge roller (8).
또한, 양면인쇄모드인 경우에는 용지의 이송경로를 용지반전부(11)측으로 전환시켜 용지가 용지반전부(11)로 이송되도록 한다. 용지반전부(11)에서 인쇄면이 전환된 용지는 다수개의 이송롤러(13)(14)(15)들에 의해 다시 레지스터롤러(4)측으로 이송된다. 레지스터롤러(4)에서 선단이 정렬된 용지는 단면인쇄모드시와 동일한 경로를 거치면서 후면의 인쇄가 실시되며, 인쇄가 종료된 용지는 배지롤러(8)에 의해 배지대(9)로 배출되는 것이다.In addition, in the duplex printing mode, the paper feed path is switched to the paper inverting portion 11 side so that the paper is transferred to the paper inverting portion 11. The paper whose printing surface is switched in the paper inverting portion 11 is conveyed back to the register roller 4 side by a plurality of feed rollers 13, 14, 15. The paper in which the leading edge is aligned in the register roller 4 is printed through the same path as in the single-sided printing mode, and the finished paper is discharged to the discharge tray 9 by the delivery roller 8. will be.
그러나 상기한 바와 같은 종래 기술에 의한 전자사진 프로세서의 양면인쇄 장치는 용지의 인쇄면을 전환시키기 위하여 별도의 용지반전부를 갖는 등 용지전환구조가 차지하는 용적 및 이에 소요되는 부품이 많아 기기의 사이즈가 커지고, 중량이 무거워져 제품의 경박단소화가 어렵다는 문제가 있다.However, the two-sided printing apparatus of the electrophotographic processor according to the prior art as described above has a large volume and parts required for the paper switching structure, such as having a separate paper inverting portion to switch the printing surface of the paper, thereby increasing the size of the device. As the weight becomes heavy, there is a problem that it is difficult to reduce the thickness of the product.
또한, 종래에는 용지를 전환시키는 경로가 하나이기 때문에 용지의 양면 인쇄에 소요되는 시간이 지연되는 문제가 있다.In addition, conventionally, since there is only one path for switching the paper, there is a problem that the time required for duplex printing of the paper is delayed.
이와 같은 문제점을 감안하여 안출한 본 발명의 목적은 장치의 구조를 간소화함으로써 장치가 적용되는 전자사진 프로세서의 크기를 경박단소화하려는 것이다.The object of the present invention devised in view of such a problem is to simplify the structure of the device to reduce the size of the electrophotographic processor to which the device is applied.
본 발명의 다른 목적은 양면인쇄 경로를 다양화시켜 양면인쇄의 속도를 향상시키려는 것이다.Another object of the present invention is to improve the speed of duplex printing by diversifying the duplex printing path.
도 1은 종래 기술에 의한 전자사진 프로세서의 양면인쇄 장치의 구성을 보인 개략도.1 is a schematic view showing the configuration of a duplex printing apparatus of an electrophotographic processor according to the prior art;
도 2는 본 발명에 의한 전자사진 프로세서의 양면인쇄 장치의 일실시예의 구성을 보인 개략도.Figure 2 is a schematic diagram showing the configuration of an embodiment of a duplex printing apparatus of an electrophotographic processor according to the present invention.
( 도면의 주요 부분에 대한 부호의 설명 )(Explanation of symbols for the main parts of the drawing)
31,32 ; 제1,2 반전/배지 롤러 33,34 ; 제1,2 가이드 레버31,32; 1st, 2nd reverse / medium roller 33,34; 1st and 2nd guide lever
35,36 ; 제1,2 이송롤러 37,38,39 ; 제1,2,3 위치검출센서35,36; First and second feed rollers 37,38,39; 1st, 2nd, 3rd position detection sensor
40 ; 메일 박스40; Mail box
상기한 바와 같은 본 발명의 목적을 달성하기 위한 전자사진 프로세서의 양면인쇄 장치는 기기본체와, 상기 기기본체에 구비되어 용지가 적재되는 급지카세트와, 상기 급지카세트의 용지를 픽업시키는 픽업 롤러와, 상기 픽업 롤러에서 공급되는 용지의 선단을 정렬하는 레지스터 롤러와, 상기 레지스터 롤러를 통과한 용지에 화상을 형성하는 화상형성장치 및 전사롤러와, 용지의 화상을 정착시키는 정착 롤러와, 화상이 정착된 용지가 배출되는 배지대와, 상기 정착 롤러를 통과한 용지의 인쇄면을 반전시키는 복수개의 용지반전수단과, 상기 용지반전수단에 의해 반전된 용지를 상기 레지스터 롤러측으로 이송시키도록 용지의 이송경로상에 설치되는 다수개의 이송롤러들과, 상기 용지반전수단과 이송롤러를 구동시키는 구동수단과, 상기 용지반전수단과 이송롤러에 각각 설치되어 이송되는 용지의 위치를 검출함으로써 용지의 방향 및 이송속도의 조절이 가능하도록 하는 위치검출수단을 포함하는 것을 특징으로 한다.An apparatus for duplex printing of an electrophotographic processor for achieving the object of the present invention as described above includes a machine body, a paper feed cassette provided on the device body, a pickup roller for picking up paper of the paper cassette, A register roller for aligning the leading edge of the paper supplied from the pickup roller, an image forming apparatus and a transfer roller for forming an image on the paper passing through the register roller, a fixing roller for fixing the image of the paper, and an image On the conveyance path of the paper so that the discharge tray from which the paper is discharged, a plurality of paper inverting means for inverting the printing surface of the paper passing through the fixing roller, and the paper inverted by the paper inverting means to the register roller side. A plurality of feed rollers installed in the apparatus, drive means for driving the paper reversing means and the feed rollers, and the paper reversal. By detecting the position of the paper on which the installation is transferred to each stage and the transport roller is characterized in that it comprises position detection means for to enable the direction and speed of the paper feed control.
상기 용지반전수단은 상기 정착롤러를 통과하여 전면의 인쇄가 완료된 용지를 반전시키거나, 전후면의 인쇄가 완료된 용지는 배출시키는 반전/배지 롤러와; 인쇄가 완료된 용지를 타측 용지반전수단으로 안내하거나, 반전된 인쇄용지를 상기 이송롤러측으로 안내하는 가이드 레버가 포함되는 것이 바람직하다.The paper reversing means includes: a reversing / badging roller passing through the fixing roller to invert the printed paper on the front surface or discharging the printed paper on the front and back surfaces; It is preferable to include a guide lever for guiding the completed paper to the other paper reversing means, or to guide the reversed printing paper to the feed roller side.
상기 위치검출수단은 상기 반전 롤러의 입구측에 설치되는 반전위치검출센서와, 상기 이송롤러들 중 마지막 이송롤러의 출구측에 설치되는 급지위치검출센서가 포함되는 것이 바람직하다.Preferably, the position detecting means includes a reversal position detecting sensor provided at an inlet side of the reversing roller, and a paper feed position detecting sensor provided at an exit side of the last conveying roller among the conveying rollers.
상기 용지반전수단의 최상측에는 인쇄가 완료된 용지를 수신자별로 수납시키는 메일박스가 구비되는 것이 바람직하다.It is preferable that a mailbox for accommodating the printed paper for each recipient is provided at the uppermost side of the paper reversing means.
이하, 상기한 바와 같은 본 발명의 바람직한 실시예를 첨부도면에 의거하여 보다 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention as described above will be described in more detail with reference to the accompanying drawings.
첨부도면 도 2는 본 발명에 의한 전자사진 프로세서의 양면인쇄 장치의 일실시예의 구성을 보인 개략도이다.2 is a schematic view showing the configuration of an embodiment of a duplex printing apparatus of an electrophotographic processor according to the present invention.
이에 도시한 바와 같이, 본 발명 일실시예는 전자사진 프로세서의 기기 본체(21)의 내부에 급지 카세트(22)가 구비되어 있고, 급지 카세트의 상부에는 픽업 롤러(23)가 설치되어 있으며, 그 상측으로 용지의 이송경로상에 용지의 선단을 정렬하기 위한 레지스터 롤러(24), 용지에 화상을 형성하기 위하여 감광드럼(25a)을 포함한 화상형성장치(25)와 전사롤러(26), 용지에 형성된 화상을 정착시키기 위한 정착롤러(27)가 순차적으로 설치되어 있다.As shown in the drawing, in one embodiment of the present invention, a paper feed cassette 22 is provided inside the main body 21 of the electrophotographic processor, and a pickup roller 23 is provided on the paper feed cassette. A register roller 24 for aligning the leading edge of the paper on a paper conveyance path upward, an image forming apparatus 25 including a photosensitive drum 25a for forming an image on the paper, a transfer roller 26, A fixing roller 27 for fixing the formed image is provided in sequence.
정착롤러(27)의 상측에는 용지의 인쇄면을 전환시킴과 아울러 배지대(28)측으로 인쇄가 완료된 용지를 배출하는 제1 반전/배지 롤러(31)가 설치되어 있고, 제1 반전/배지 롤러의 상측에는 역시 용지의 인쇄면을 전환시키는 제2 반전/배지 롤러(32)가 설치되어 있다.On the upper side of the fixing roller 27, a first reversing / discharging roller 31 for switching the printing surface of the paper and discharging the printed sheet to the discharge stage 28 is provided. On the upper side of the second reversal / discharge roller 32, which also switches the printing surface of the paper, is provided.
제2 반전/배지 롤러(32)의 상측에는 메일박스(인쇄가 완료된 용지를 수신자별로 보관하는 박스)(40)가 설치되어 있는 바, 이는 소비자의 필요에 의해 부가적으로 사용하도록 한다.On the upper side of the second reversing / dispensing roller 32, a mailbox (box for storing printed sheets of paper for each recipient) is provided, which is to be used additionally by the needs of the consumer.
제1,2 반전/배지 롤러(31)(32)에는 각각 제1,2 가이드 레버(33)(34)가 구비되어 있어 제1 가이드 레버(33)는 이송되는 용지를 배지대(28)측 또는 제2 반전/배지 롤러(32)측에 선택적으로 안내하도록 하며, 제2 가이드 레버(34)는 용지를 배지대(28)측 또는 메일박스(40)측에 선택적으로 안내하도록 한다.The first and second reversing / disposing rollers 31 and 32 are provided with first and second guide levers 33 and 34, respectively, so that the first guide lever 33 feeds the conveyed paper to the discharge tray 28 side. Alternatively, the second reversing / dispensing roller 32 may be selectively guided, and the second guide lever 34 may selectively guide the paper to the discharge bin 28 or the mailbox 40.
본 발명은 제1,2 반전/배지 롤러(31)(32) 및 제1,2 가이드 레버(33)(34)를 포함하는 용지전환구조가 제공되는 바, 상기 제1,2 반전/배지 롤러(31)(32)에 의해 인쇄면이 반전된 용지를 안내하는 제1,2 이송 롤러(35)(36)가 설치되어 있다.The present invention provides a paper switching structure including first and second reversing / badging rollers 31 and 32 and first and second guide levers 33 and 34, wherein the first and second reversing / badging rollers are provided. First and second transfer rollers 35 and 36 for guiding the paper whose print surface is reversed by (31) and (32) are provided.
또한, 제1 반전/배지 롤러(31)의 입구측에는 제1 위치검출센서(37)가 설치되어 있고, 제2 반전/배지 롤러(32)의 입구측에는 제2 위치검출센서(38)가 설치되어 있으며, 제2 이송롤러(36)의 출구측에는 제3 위치검출센서(39)가 설치되어 있어 각각 용지의 이송속도를 검출하여 각각의 역회전 모터(41)(42)(43)들에 의하여 롤러들의 회전속도를 규제하도록 한다.In addition, a first position detection sensor 37 is provided at an inlet side of the first inversion / medium roller 31, and a second position detection sensor 38 is provided at an inlet side of the second inversion / medium roller 32. In addition, a third position detection sensor 39 is installed at the outlet side of the second feed roller 36 to detect the feed speed of each paper, and the rollers are rotated by the respective reverse rotation motors 41, 42, 43. To regulate their speed.
기기 본체(21)의 하부 측면으로 레지스터 롤러(24)의 하부에는 매뉴얼 급지대(44)가 구비되어 있고, 매뉴얼 용지를 픽업시키는 픽업 롤러(45)가 설치되어 있다.On the lower side of the apparatus main body 21, a manual feed tray 44 is provided below the register roller 24, and a pickup roller 45 for picking up manual paper is provided.
이와 같이 구성되는 본 발명에 의한 인쇄 동작을 설명한다.The printing operation according to the present invention configured as described above will be described.
먼저 단면인쇄모드시에는 급지카세트(22)의 용지를 픽업 롤러(23)에서 픽업시켜 레지스터 롤러(24)측으로 공급하면, 레지스터 롤러(24)에서 용지가 정렬된 후에는 화상형성장치(25)측으로 용지가 이송된다. 화상형성장치(25)와 전사롤러(26)에서 화상이 형성된 용지는 정착롤러(27)를 거치면서 화상이 용지에 정착되어 제1 반전/배지 롤러(31)를 통해 배지대(28)로 배출된다.First, in the single-sided printing mode, the sheet of the paper feed cassette 22 is picked up by the pickup roller 23 and fed to the register roller 24 side. After the sheet is aligned on the register roller 24, the sheet is fed to the image forming apparatus 25 side. The paper is fed. The paper on which the image is formed in the image forming apparatus 25 and the transfer roller 26 passes through the fixing roller 27, and the image is fixed to the paper and discharged to the discharge tray 28 through the first reversal / discharge roller 31. do.
다음으로 양면인쇄모드시에는 급지카세트(22)에서 첫 번째 인쇄용지가 급지되어 레지스터 롤러(24)와 화상형성장치(25)를 거쳐 정착롤러(27)에서 화상이 정착된 후에 제1 위치검출센서(37)에서 용지의 진입을 감지하게 되면, 제1 가이드 레버(33)를 회전시켜 인쇄용지는 제2 반전/배지 롤러(32)측으로 안내된다.Next, in the duplex printing mode, the first position detection sensor is fed after the first printing paper is fed from the paper feed cassette 22 and the image is fixed at the fixing roller 27 via the register roller 24 and the image forming apparatus 25. When it is detected at 37 that the sheet enters, the first guide lever 33 is rotated so that the printing paper is guided to the second reverse / medium roller 32 side.
제2 반전/배지 롤러(32)측으로 이송된 용지는 제2 가이드 레버(34)와 제2 반전/배지 롤러(32)에 의해 배지대(28)측으로 배지되는데, 용지의 후단이 제2 위치검출센서(38)에 의하여 감지되면, 제2 반전/배지 롤러(32)가 역회전되어 용지의 인쇄면이 반전된 상태로 제1 이송롤러(35)측으로 이송된다. 인쇄면이 반전된 용지는 제2 이송롤러(36)측으로 이송되어 다시 레지스터 롤러(24)로 이송되며, 후면의 인쇄동작이 수행된다.The sheet conveyed to the second reversal / discharge roller 32 side is discharged to the discharge table 28 side by the second guide lever 34 and the second reversal / discharge roller 32, and the rear end of the sheet detects the second position. When detected by the sensor 38, the second reversal / media roller 32 is reversely rotated and is conveyed to the first feed roller 35 side with the printing surface of the paper reversed. The paper having the reversed printing surface is conveyed to the second conveying roller 36 side and conveyed to the register roller 24 again, and the printing operation of the rear surface is performed.
전면인쇄가 실시되는 두 번째 인쇄용지는 첫 번째 인쇄용지에 이어서 연속적으로 이송이 이루어지도록 급지가 이루어져 정착롤러(27)에서 전면의 화상이 정착된 후에 제1 위치검출센서(37)에서 두 번째 인쇄용지의 진입이 감지되면, 제1 가이드 레버(33)는 본래의 위치로 복귀되어 두 번째 인쇄용지는 제1 반전/배지 롤러(31)에 의해 배지대(28)측으로 배지된다. 제1 위치검출센서(37)에서 두 번째 인쇄용지의 후단부를 감지하면 제1 반전/배지 롤러(31)는 역회전되어 두 번째 인쇄용지는 제2 이송롤러(36)측으로 이송된다. 제2 이송롤러측으로 이송되는 용지는 인쇄면이 반전된 상태이기 때문에 레지스터 롤러(24)로 이송되어 동일한 인쇄동작에 의해 후면 인쇄가 실시된다.The second printing paper on which the front printing is performed is fed to continuously feed the first printing paper, and then the second printing paper on the first position detection sensor 37 after the front image is fixed on the fixing roller 27. Is detected, the first guide lever 33 is returned to its original position so that the second printing sheet is discharged to the discharge stage 28 side by the first reversal / discharge roller 31. When the first position detection sensor 37 detects the rear end of the second printing paper, the first reversal / medium roller 31 is reversely rotated, and the second printing paper is transferred to the second feed roller 36. Since the sheet conveyed to the second conveying roller side is in a state where the printing surface is inverted, the sheet is conveyed to the register roller 24 and the back printing is performed by the same printing operation.
첫 번째 인쇄용지의 후면 인쇄가 실시되기 전에 세 번째 인쇄용지의 전면인쇄가 실시되도록 첫 번째 인쇄용지와 두 번째 인쇄용지의 이송속도가 제어부의 시스템 제어에 의하여 각 모터(41)(42)(43)들에 의하여 조절되며, 세 번째 인쇄용지의 전면인쇄후에 첫 번째 인쇄용지의 후면인쇄가 완료되면, 세 번째 인쇄용지는 제1 반전/배지 롤러(31)에 의해 배지대(28)측으로 배출되는 것이다.The transfer speeds of the first and second printing papers are controlled by the system control of each motor (41) (42) (43) so that the front printing of the third printing paper is carried out before the back printing of the first printing paper is carried out. The third printing paper is discharged to the discharge tray 28 by the first reversing / discharging roller 31 when the rear printing of the first printing paper is completed after the front printing of the third printing paper. .
인쇄가 완료된 용지를 메일박스(40)로 배출시키는 경우에는 정착 롤러(27)에서 인쇄가 완료된 용지가 제1 위치검출센서(37)에서 감지되면 제1 가이드 레버(33)가 회전되어 용지를 제2 반전/배지 롤러(32)측으로 안내하게 되고, 제2 위치검출센서(38)에서 용지의 선단부를 감지하게 되면, 제2 가이드 레버(34)가 회전되어 용지를 메일박스(40)측으로 안내하게 됨으로써 용지는 메일박스로 수납되는 것이다. 이러한 메일박스 기능은 단면인쇄모드나 양면인쇄모드에 공히 사용가능하다.When the printed paper is discharged to the mailbox 40, when the printed paper is detected by the fixing roller 27 at the first position detection sensor 37, the first guide lever 33 is rotated to remove the paper. 2 guides toward the reverse / medium roller 32, and when the second position detection sensor 38 detects the leading end of the paper, the second guide lever 34 is rotated to guide the paper to the mailbox 40 side. As a result, the paper is stored in a mailbox. This mailbox function can be used in both single-sided printing mode and double-sided printing mode.
이상에서 설명한 바와 같이, 본 발명에 의한 전자사진 프로세서의 양면인쇄 장치는 별도의 용전반전을 위한 스페이스를 갖고, 용지의 반전을 위한 경로를 줄여서 전체 기기의 사이즈를 줄일 수 있는 효과가 있다.As described above, the duplex printing apparatus of the electrophotographic processor according to the present invention has a separate space for inversion of electricity and has an effect of reducing the size of the entire apparatus by reducing a path for inversion of paper.
또한, 용지의 반전 경로를 복수개(본 발명 실시예에서는 2개소) 형성함으로써 양면인쇄 효율을 극대화시킬 수 있는 효과도 있다.In addition, it is also possible to maximize the duplex printing efficiency by forming a plurality of paper inversion paths (two places in the embodiment of the present invention).
Claims (4)
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| JPH06250463A (en) * | 1993-02-22 | 1994-09-09 | Fuji Xerox Co Ltd | Automatic double-face image forming device |
| JPH08202095A (en) * | 1995-01-31 | 1996-08-09 | Fuji Xerox Co Ltd | Paper carrying device for image forming device |
| JPH09288395A (en) * | 1996-04-22 | 1997-11-04 | Konica Corp | Image forming device |
| JPH10148975A (en) * | 1996-11-21 | 1998-06-02 | Ricoh Co Ltd | Double-sided unit supporting device |
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