KR100516604B1 - Paper thickness sensor of printer - Google Patents

Paper thickness sensor of printer Download PDF

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Publication number
KR100516604B1
KR100516604B1 KR1019970057820A KR19970057820A KR100516604B1 KR 100516604 B1 KR100516604 B1 KR 100516604B1 KR 1019970057820 A KR1019970057820 A KR 1019970057820A KR 19970057820 A KR19970057820 A KR 19970057820A KR 100516604 B1 KR100516604 B1 KR 100516604B1
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KR
South Korea
Prior art keywords
paper
printer
main body
actuator
sensor
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KR1019970057820A
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Korean (ko)
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KR19990038177A (en
Inventor
편준완
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삼성전자주식회사
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Priority to KR1019970057820A priority Critical patent/KR100516604B1/en
Publication of KR19990038177A publication Critical patent/KR19990038177A/en
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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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5029—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the copy material characteristics, e.g. weight, thickness
    • 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
    • B41J11/0035—Handling copy materials differing in thickness
    • 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
    • B41J11/009—Detecting type of paper, e.g. by automatic reading of a code that is printed on a paper package or on a paper roll or by sensing the grade of translucency of the paper
    • 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
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • 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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6502—Supplying of sheet copy material; Cassettes therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00611—Detector details, e.g. optical detector
    • G03G2215/00616—Optical detector
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00738—Detection of physical properties of sheet thickness or rigidity

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

가. 청구범위에 기재된 발명이 속한 기술분야.end. The technical field to which the invention described in the claims belongs.

본 발명은 프린터에 최상의 전사 및 정착조건을 설정하기 위한 프린터의 용지두께 감지장치에 관한 것이다.The present invention relates to a paper thickness detection device of a printer for setting the best transfer and fixing conditions in the printer.

나. 발명이 해결하려고 하는 기술적 과제.I. The technical problem that the invention is trying to solve.

본 발명은 픽업롤러에 의해 급지된 용지의 굽힘력을 이용하여 용지의 두께를 감지할 수 있는 프린터의 용지두께 감지장치를 제공하는데 있다.The present invention is to provide a paper thickness detecting apparatus of a printer capable of detecting the thickness of the paper by using the bending force of the paper fed by the pickup roller.

다. 발명의 해결방법의 요지.All. Summary of the Solution of the Invention.

본 발명은 픽업롤러에 의해 급지된 용지의 굽힘력을 측정하기 위하여 중앙에 힌지결합되어 일측하단에는 스프링이 설치되며, 타측은 레버역할을 하도록 본체의 적소에 설치되는 용지가이드와, 상기 용지가이드 레버의 상하운동에 의하여 유동되도록 중앙이 힌지결합되어 본체의 적소에 설치되는 엑추에이터와, 상기 엑추에이터 일측의 유동을 감지하도록 설치되는 센서 및 상기 센서에 의해서 감지된 결과를 전사부와, 정착부에 전달하긴 위한 제어부로 구성됨을 특징으로 한다.The present invention is hinged to the center in order to measure the bending force of the paper fed by the pickup roller, the spring is installed at one lower end, the other side is a paper guide installed in place of the main body to act as a lever, and the paper guide lever The center is hinged to flow by the vertical movement of the actuator is installed in place of the main body, the sensor is installed to detect the flow of the actuator one side and the transfer result to the transfer unit, the fixing unit and the result detected by the sensor Characterized in that it is configured as a control unit for.

라. 발명의 중요한 용도.la. Important use of the invention.

본 발명은 프린터의 용지두께 감지장치.The present invention is a paper thickness detection device of the printer.

Description

프린터의 용지두께 감지장치Paper thickness detector of the printer

본 발명은 LBP(Laser Beam Printer)등 전자사진 방식을 이용한 프린터에 관한 것으로서, 특히 화상을 형성하기 위하여 급지되는 용지(Recording Material)의 두께를 감지하여 이에따른 전사, 정착조건을 제어할 수 있는 프린터의 용지두께 감지장치에 관한 것이다.The present invention relates to a printer using an electrophotographic method such as LBP (Laser Beam Printer), in particular a printer that can detect the thickness of the paper (Recording Material) fed to form an image to control the transfer and fixing conditions accordingly To a paper thickness detection device.

통상적으로, 전자사진방식을 이용한 프린터등에는 다수매의 용지(용지)를 적재시킬 수 있는 급지카세트(Paper Cassette)가 장착된다. 상기 급지카세트의 상측 본체에는 상기 적재된 용지를 낱장씩 본체로 급지시킬 수 있도록 픽업롤러(Pick-up Roller)가 장착되어 있으며, 상기 픽업롤러에 의해서 급지된 용지는 다수개의 이송롤러를 통해 감광드럼, 대전수단, 현상롤러, 전사롤러등으로 구성되어 있는 현상부(Developing Unit)로 이송되어 현상제에 의해 화상이 형성되는 것이다. 그후, 화상이 형성된 용지는 압착롤러와, 히트롤러로 구성된 정착기(Fuser)에 의해서 고온, 고압으로 화상이 정착된후, 다수개의 배지롤러를 통해 배지부로 배지되는 것이다.In general, a printer using an electrophotographic method is equipped with a paper cassette capable of loading a plurality of sheets of paper (paper). The upper body of the paper feed cassette is equipped with a pick-up roller (Pick-up Roller) to feed the loaded paper into the main body sheet by sheet, the paper fed by the pickup roller is a photosensitive drum through a plurality of feed rollers It is transferred to a developing unit composed of a charging means, a developing roller, a transfer roller, and the like to form an image by the developer. Thereafter, the paper on which the image is formed is fixed at high temperature and high pressure by a fixing roller composed of a pressing roller and a heat roller, and then discharged to the discharge unit through a plurality of discharge rollers.

그러나 상기와 같은 장치에 있어서, 급지카세트에 급지되는 용지는 그 크기가 다양할 뿐만 아니라 두께 또한, 다양하다. 상기 급지카세트에는 용지의 크기에 따라 가이드될 수 있는 다양한 장치들이 구비되어 있으나, 용지두께를 측정하는 장치나 구조물등은 구비되어 있지 않다. 따라서, 용지의 두께에 따라 전압이 변화되어야 하는 전사과정이나 정착과정에 있어서, 전사영역의 대략 중간값을 설정하여 사용하기 때문에 용지에 형성되는 화상의 품질이 저하되는 문제점이 있었다.However, in the above apparatus, the paper fed into the paper cassette is not only varied in size but also in thickness. The paper feed cassette is provided with various devices that can be guided according to the size of the paper, but there is no device or structure for measuring the thickness of the paper. Therefore, in the transfer process or the fixing process in which the voltage should be changed in accordance with the thickness of the paper, there is a problem in that the quality of the image formed on the paper is deteriorated because the intermediate value of the transfer area is set and used.

상기와 같은 문제점을 해결하기 위하여 본 발명의 목적은 픽업롤러에 의해 급지된 용지의 굽힘력을 이용하여 용지의 두께를 감지할 수 있는 프린터의 용지두께 감지장치를 제공하는데 있다.SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a paper thickness detection device of a printer capable of detecting the thickness of paper by using the bending force of the paper fed by the pickup roller.

본 발명의 다른 목적은 용지의 굽힘력에 의해서 감지된 용지 두께에 대한 정보를 이용하여 적절한 전사전압 및 정착조건을 제어할 수 있는 제어부가 구성된 프린터의 용지두께 감지장치를 제공하는데 있다.Another object of the present invention is to provide a paper thickness sensing apparatus of a printer, in which a control unit capable of controlling an appropriate transfer voltage and a fixing condition by using information on the paper thickness detected by the bending force of the paper is configured.

상기와 같은 목적을 달성하기 위하여 본 발명은 전사사진 방식을 이용한 프린터에 있어서, 다수매의 용지가 급지되어 본체에 장착되는 급지카세트와, 상기 용지를 낱장씩 급지시키기 위하여 본체의 적소에 설치되는 픽업롤러와, 상기 픽업롤러에 의해 급지된 용지의 굽힘력을 측정하기 위하여 중앙에 힌지결합되어 일측하단에는 스프링이 설치되며, 타측은 레버역할을 하도록 본체의 적소에 설치되는 용지가이드와, 상기 용지가이드 레버의 상하운동에 의하여 유동되도록 중앙이 힌지결합되어 본체의 적소에 설치되는 엑추에이터와, 상기 엑추에이터 일측의 유동을 감지하도록 설치되는 센서 및 상기 센서에 의해서 감지된 결과를 전사부와, 정착부에 전달하기 위한 제어부로 구성됨을 특징으로 한다.In order to achieve the above object, the present invention provides a printer using a transfer photograph method, wherein a plurality of sheets of paper are fed and a cassette is mounted on a main body, and a pickup is installed at a position of the main body to feed the sheets one by one. In order to measure the bending force of the paper fed by the pick-up roller, a roller is hinged at the center, and a spring is installed at one lower end, and a paper guide installed in place of the main body to act as a lever, and the paper guide. The center is hinged so as to flow by the vertical movement of the lever, the actuator is installed in place of the main body, the sensor is installed to detect the flow of the actuator one side and transfer the results detected by the sensor to the transfer unit, the fixing unit It is characterized by consisting of a control unit for.

이하 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다. 그리고, 본 발명을 설명함에 있어서, 관련된 공지기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

도 1은 본 발명의 바람직한 일실시예에 따른 용지두께 감지장치의 구성도이다.1 is a block diagram of a paper thickness detection apparatus according to an embodiment of the present invention.

본 발명에 의한 구성은 도 1에 도시된 바와 같이, 우선 본체에는 급지카세트(1)가 장착된다. 상기 급지카세트(1)에는 다수개의 용지(2)를 적재시킬 수 있는 용지플레이트(3)가 설치되어 있으며, 상기 용지플레이트(3)의 하측에는 상기 적재된 용지(2)를 상측으로 가압하기 위한 다수개의 가압스프링(4)이 설치된다. 그후, 상기 급지카세트(1)에 적재된 용지를 낱장씩 본체에 급지시키기 위한 픽업롤러(Pick-up Roller)(5)가 본체의 적소에 설치된다.In the configuration according to the present invention, as shown in Fig. 1, first, the paper feeding cassette 1 is mounted on the main body. The paper cassette 1 is provided with a paper plate 3 capable of stacking a plurality of papers 2, and a lower side of the paper plate 3 for pressing the loaded paper 2 upwards. A plurality of pressure springs 4 are installed. Thereafter, a pick-up roller 5 for feeding the sheets stacked in the paper feeding cassette 1 to the main body is installed in place of the main body.

그후, 상기 픽업롤러(5)에 의해 급지된 용지의 굽힘력을 측정하기 위하여Then, to measure the bending force of the paper fed by the pickup roller 5

본체의 적소 위치에는 그 중앙에 힌지 결합되고, 그 일측상단과 본체프레임(8) 사이에 스프링(7)이 설치되며, 그 타측 하단은 레버(6a)를 형성한 용지가이드(6)가 설치된다. 상기 스프링(7)은 가압스프링을 사용한다. 또한, 상기 레버(6a)의 이웃한 위치에는 상기 용지가이드(6)의 레버(6a)와 그 일단이 접촉되어 상, 하운동에 의하여 유동되도록 그 중앙이 힌지 결합된 엑추에이터(9)가 구비된다. 상기 엑추에이터(9) 일측은 레버(6a)와 접촉됨과 아울러 상기 레버(6a)의 유동에 의해 흔들리고, 그 타일측은 상기 엑추에이터(9)의 유동을 감지할수 있도록 센서(10)가 를 설치된다.A hinge is coupled to the center of the main body at a proper position, and a spring 7 is installed between an upper end of the main body and the main body frame 8, and a paper guide 6 including a lever 6a is provided at the lower end of the main body. . The spring 7 uses a pressure spring. In addition, at an adjacent position of the lever 6a, an actuator 9 hinged at its center is provided so that one end of the lever 6a of the paper guide 6 comes into contact with and flows by up and down movement. . One side of the actuator 9 is in contact with the lever 6a and is shaken by the flow of the lever 6a, and the tile side is provided with a sensor 10 to detect the flow of the actuator 9.

상기 센서(10)는 상기 엑추에이터(9)의 유동에 의하여 '온' , '오프' 를 판단하기 위하여 포토센서를 설치한다. 그후, 상기 센서(10)에 의해서 감지된 결과를 전사부(미도시 됨)와, 정착부(미도시 됨)에 전달하기 위한 제어부(11)가 상기 센서와 연결된다.The sensor 10 installs a photosensor to determine the 'on', 'off' by the flow of the actuator (9). Then, the transfer unit (not shown) and the control unit 11 for transmitting the result detected by the sensor 10 to the fixing unit (not shown) is connected with the sensor.

본 발명에 의한 작동을 도 1을 참조하여 설명하면 하기와 같다.The operation according to the present invention will be described with reference to FIG. 1.

급지카세트(1)에 적재된 다수매의 용지(2)가 픽업롤러(5)에 의해 낱장씩 순차적으로 본체에 급지되면, 상기 급지된 용지(2)는 용지가이드(6)에 접하면서 휘어지게 된다. 즉, 상기 용지가이드(6)는 상기 용지(2)의 굽힘력(Bending Force)을 받게되는 것이다. 이때, 상기 용지가이드(6)의 하측에 설치된 가압스프링(7)은 일정한 탄성력을 받게되며, 상기 용지가이드(6)는 힌지를 중심으로 하측으로 회전하게 된다. 그후, 상기 회전되는 용지가이드(6)의 레버(6a)는 엑추에이터(9)의 일단부와 접촉되어 상기 엑추에이터(9)를 유동시킨다. 이와 동시에 상기 엑추에이터(9)의 타측단부는 포토센서(10)의 감지를 받게된다. 즉, 상기 용지의 굽힘력이 크면(용지의 두께가 두꺼우면 굽힘력이 커짐) 상기 엑추에이터(9)의 유동이 커지므로 상기 포토센서(10)의 감지를 받게되는 것이다. 그후, 상기 센서(10)에 연결된 제어부(11)가 상기 센서의 결과를 처리하여 본체의 전사롤러에 인가되는 전사전압과, 정착조건을 용지두께에 따른 최적의 상태로 조절하는 것이다.When a plurality of sheets of paper 2 loaded on the sheet feeding cassette 1 are fed into the main body one by one by the pickup roller 5, the sheet of paper 2 is bent while contacting the sheet guide 6. do. In other words, the paper guide 6 receives the bending force of the paper 2. At this time, the pressure spring 7 installed on the lower side of the paper guide 6 receives a constant elastic force, the paper guide 6 is rotated to the lower side around the hinge. Thereafter, the lever 6a of the rotated paper guide 6 comes into contact with one end of the actuator 9 to flow the actuator 9. At the same time, the other end of the actuator 9 is subjected to the detection of the photosensor 10. That is, when the bending force of the paper is large (when the thickness of the paper is thick, the bending force becomes large), the flow of the actuator 9 becomes large, and thus the sensing of the photosensor 10 is received. Then, the control unit 11 connected to the sensor 10 processes the result of the sensor to adjust the transfer voltage applied to the transfer roller of the main body and the fixing condition to an optimum state according to the paper thickness.

본 발명은 그 용도를 벗어나지 않는 범위내에서 다수개의 포토센서나, 가변저항기를 설치하여 좀더 정밀한 용지두께를 측정할 수 있는 것이다.The present invention can measure a more precise paper thickness by installing a plurality of photosensors or variable resistors within a range without departing from the intended use.

상술한 바와 같이 본 발명의 실시예에 따른 프린터의 용지두께 감지장치는 용지두께에 따른 굽힘력의 크기를 이용하여 용지두께를 측정함으로써 최상의 전사조건 및 정착조건을 설정할 수 있으므로 이에 따른 고품질의 화상이 형성되는 효과가 있다.As described above, the paper thickness detection apparatus of the printer according to the embodiment of the present invention can set the best transfer condition and fixing condition by measuring the paper thickness using the size of the bending force according to the paper thickness, so that high quality images There is an effect that is formed.

도 1은 본 발명의 바람직한 일실시예에 따른 용지두께 감지장치의 구성도.1 is a block diagram of a paper thickness detection apparatus according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1: 급지카세트 2: 용지1: paper cassette 2: paper

3: 용지플레이트 4: 가압스프링3: paper plate 4: pressure spring

5: 픽업롤러 6: 용지가이드5: pickup roller 6: paper guide

8: 프레임 9: 엑추에이터8: frame 9: actuator

10: 포토센서 11: 제어부10: photo sensor 11: control unit

Claims (3)

전사사진 방식을 이용한 프린터에 있어서,In a printer using a transfer photograph method, 다수매의 용지가 급지되어 본체에 장착되는 급지카세트와;A paper feed cassette for feeding a plurality of sheets of paper and mounted in the main body; 상기 용지를 낱장씩 급지시키기 위하여 본체의 적소에 설치되는 픽업롤러와;A pickup roller installed at an appropriate position of the main body to feed the sheet by sheet; 상기 픽업롤러에 의해 급지된 용지의 굽힘력을 측정하기 위하여 중앙에 힌지 결합되어 일측하단에는 스프링이 설치되며, 타측은 레버역할을 하도록 본체의 적소에 설치되는 용지가이드와;A paper guide which is hinged at the center to measure the bending force of the paper fed by the pickup roller, a spring is installed at one lower end, and a paper guide installed at a proper position of the main body to serve as a lever; 상기 용지가이드 레버의 상하운동에 의하여 유동되도록 중앙이 힌지결합되어 본체의 적소에 설치되는 엑추에이터와;An actuator hinged to a center of the paper guide lever so as to be moved by an up-down movement of the paper guide lever, and installed at a position of the main body; 상기 엑추에이터 일측의 유동을 감지하도록 설치되는 센서 및;A sensor installed to sense a flow of one side of the actuator; 상기 센서에 의해서 감지된 결과를 전사부와, 정착부에 전달하기 위한 제어부로 구성됨을 특징으로 하는 프린터의 용지두께 감지장치.And a transfer unit, and a control unit for transferring the result detected by the sensor to the fixing unit. 제 1 항에 있어서,The method of claim 1, 상기 스프링은 본체프레임에 설치되는 가압스프링임을 특징으로 하는 프린터의 용지두께 감지장치.The spring is a thickness detection device of the printer, characterized in that the pressing spring is installed in the main frame. 제 1 항에 있어서,The method of claim 1, 상기 센서는 상기 엑추에이터의 유동에 의하여 '온' , '오프' 를 판단하는 포토센서임을 특징으로 하는 프린터의 용지두께 감지장치.The sensor is a paper thickness sensing device of the printer, characterized in that the photo sensor to determine the 'on', 'off' by the flow of the actuator.
KR1019970057820A 1997-11-03 1997-11-03 Paper thickness sensor of printer KR100516604B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940672A (en) * 1982-08-31 1984-03-06 Canon Inc Separating device of picture formation device
JPS6382314A (en) * 1986-09-26 1988-04-13 Mita Ind Co Ltd Paper thickness detector
JPH05333662A (en) * 1992-05-27 1993-12-17 Fuji Xerox Co Ltd Paper carrying device for the image forming device
JPH06219573A (en) * 1993-01-20 1994-08-09 Fuji Xerox Co Ltd Paper feeder of image former

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940672A (en) * 1982-08-31 1984-03-06 Canon Inc Separating device of picture formation device
JPS6382314A (en) * 1986-09-26 1988-04-13 Mita Ind Co Ltd Paper thickness detector
JPH05333662A (en) * 1992-05-27 1993-12-17 Fuji Xerox Co Ltd Paper carrying device for the image forming device
JPH06219573A (en) * 1993-01-20 1994-08-09 Fuji Xerox Co Ltd Paper feeder of image former

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