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1. 发明专利

JPH0312684A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0312684A
公开(公告)日：1991-01-21
申请号：JP14735789
申请日：1989-06-09
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03G15/20 , B65H5/02
摘要： PURPOSE:To prevent the offset of a fixed film by making the diameter of both end parts of a driving roller for the fixed film smaller than that of the center part thereof and making the diameter of both end parts of a driven roller larger than that of the center part thereof. CONSTITUTION:As to the driving roller 2 for the fixed film, the diameter of both end parts is made smaller than that of the center part and, as to the driven roller 3, the diameter of both end parts is made larger than that of the center part. Namely, the driving roller 2 for the endless fixed film, whose elastic modulus is low, is formed so that the diameter of the center part is made larger than that of both end parts and the driven roller 3 is formed contrary to the driving roller 1 so that the diameter of both end parts is larger than that of the center part. Thus, the self-aligning of the fixed film is enhanced and the offset is prevented.

2. 发明专利

JPH04212977A IMAGE FORMING APPARATUS 失效
公开(公告)号：JPH04212977A
公开(公告)日：1992-08-04
申请号：JP40065390
申请日：1990-12-06
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03G15/20
摘要： PURPOSE:To offer an image forming apparatus which is capable of stabilizing feeding of a film to be fixed by reducing as far as possible a change in the outside diameter of a driving roller in the thrust direction of the roller even if a temperature difference is caused in the thrust direction of the driving roller which drives the film. CONSTITUTION:The core bar 31b and coating layer 31a of a driving roller 31 are made from materials with different coefficients of linear expansion and the thickness of the coating layer 31a is not uniform although the outside diameter of the driving roller 31 is straight. As a result, even if a temperature difference is caused in the thrust direction of the driving roller 31, a change in the outside diameter of the driving roller can be decreased, thus stabilizing feeding of the film.

3. 发明专利

JPH0493871A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0493871A
公开(公告)日：1992-03-26
申请号：JP20776690
申请日：1990-08-06
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03G15/20
摘要： PURPOSE:To prevent a fixing film from deviating from a stop position at the time of processing jamming and to prevent the occurrence of a wrinkle caused by a jammed paper by providing a film fixing device which can fix the fixing film in the case of releasing the pressure or the tension of a fixing means. CONSTITUTION:This device is provided with the film fixing device 23 for fixing the fixing film 18 when the tension or the pressure applied to the fixing film 18 is released 1. Thus, the film 18 is prevented from deviating from the stop position at the time of preventing the elongation of the film 18 by releasing the tension when the device is not used or at the time of processing the jamming, and the occurrence of the wrinkle caused by the jammed paper is prevented.

4. 发明专利

JPH0481787A FIXATION DEVICE 失效
公开(公告)号：JPH0481787A
公开(公告)日：1992-03-16
申请号：JP19594590
申请日：1990-07-24
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03G15/20
摘要： PURPOSE:To hold a lubricant, etc., such as grease on the internal surface of a film invariably constant and prevent the frictional force of the film internal surface from increasing with a rotation time by providing a lubricant coating control means such as a roller or scraper which has an uneven surface. CONSTITUTION:A driving roller 19 which drives the endless fixation film 18 is composed of a roller which is called a grid roller having ceramic powder adhered to its top surface. This grid roller is used for the driving roller 19 and then excessive grease applied over the internal surface of the endless film 18 enters gaps between particles of the grid roller, so that the internal surface of the endless film 18 is coated with only a necessary amount of grease. Consequently, the amount of grease is held constant without increasing nor decreasing the amount of grease previously or controlling the amount of grease periodically, and the frictional force on the film internal surface is prevented from increasing.

5. 发明专利

JPH04264439A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH04264439A
公开(公告)日：1992-09-21
申请号：JP4594991
申请日：1991-02-19
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03B27/62 , G03G15/04
摘要： PURPOSE:To adjust the deviation of an original on an original platen without opening and closing a press-contacting plate by operating an adjusting means. CONSTITUTION:The adjusting means E is constituted of an adjusting member 3, an adjusting area L and a holding area M. Since the knob part 3a of the member 3 can be freely moved in the area L, the fine adjustment of the original 5 is performed in the area L by the knob part 3a. At such a time, by performing the fine adjustment in a state where the knob part 3a is pressed in a direction shown by an arrow A, a pressing part 3b whose color is the same as the surface of the sheet part 4a of a press-contacting sheet 4 where it tightly contacts with the original 5, whose thickness is the same as the sheet part 4a and whose frictional resistance is large is in tightly contacts with the original 5. Then, the original 5 is moved with the movement of the knob part 3a.

6. 发明专利

JPH04194887A PICTURE FORMING DEVICE 失效
公开(公告)号：JPH04194887A
公开(公告)日：1992-07-14
申请号：JP32013290
申请日：1990-11-22
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03G15/20 , B65H5/02 , F16H7/08 , F16H7/18
摘要： PURPOSE:To prevent misoperation and damage due to a temperature rise by providing a relay member which is given rotation from a fixing belt only when the fixing belt is deflected. CONSTITUTION:Deflection detecting rollers 23, 25, coaxially with a roller 19 and separately rotatable, are provided in both ends of the drive roller 19, and sensors 24, 26 for detecting whether the rollers 23, 25 are rotated or not at an equal speed to a fixing film 18 are provided in the outside of the deflection detecting rollers. When the fixing film 18 is put aside to a front side, a front side end part of the film 18 is protruded from an end part 19a of the roller 19 and advanced into the roller 23, the roller 23 is started to rotate at an equal speed to the film 18, this rotation is detected by a sensor 24, a signal for returning the film 18 to the interior is input to a solenoid 30 from the sensor 24, a core 30a of the solenoid 30 and a bearing 32 are lowered down, a driven roller 20 lowers the front from the inside relating to a reference position A, and the film 18 is given force of deflecting to the inside. At reversing time, the core 30a is lifted to give the film 18 force of deflecting to the front.

7. 发明专利

JPH0493870A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0493870A
公开(公告)日：1992-03-26
申请号：JP20776590
申请日：1990-08-06
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03G15/20
摘要： PURPOSE:To prevent an effect on a nip surface caused by the control of the offset of a fixing film and to eliminate an effect on an image by providing a control means for controlling the movement of the fixing film in a thrust direction at a position other than a film guiding member adjacent to the nip surface. CONSTITUTION:A supporting roller 23 is rotatably provided on a side plate and always kept in parallel with the nip surface, then a follower roller 20 is attached on the side plate so that it can move up and down. Since the roller 20 is moved up and down in order to control the offset of the fixing film 18 in the thrust direction, the roller 23 which is always kept in parallel with the nip surface and turnably attached cancels the difference of the entering angle or the tension of the film 18 to the nip surface, thereby always keeping the entering state of the film 18 to the nip surface constant. Thus, the effect on the nip surface which is caused at the time of controlling the offset of the film 18 by moving the roller 20 up and down is reduced and the effect on the image is eliminated.

8. 发明专利

JPH03177237A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH03177237A
公开(公告)日：1991-08-01
申请号：JP31418389
申请日：1989-12-05
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： B65H1/26
摘要： PURPOSE:To prevent a recording material in a cassette from shifting during transport by installing a pressing member for pressing the surface of the recording in order to prevent the dispersion shift of the recording loaded on the feeding material cassette and an attaching/separating member for attaching and separating the surface of the recording and the pressing member. CONSTITUTION:A moving piece 2 moves at the same time as a handle is pulled out during the transport of a device, and a leaf spring 3 for preventing disper sion is collided with a leaf spring regulating plate 4, and a surface 3a presses a paper P by the elastic force (a) of the leaf spring 3. If the handle 1 is pushed in, when a main body is used, the moving piece 2 moves in the (b) direction by the force of a spring 5, and the surface 3a of the leaf spring 3 for preventing dispersion is separated from the copying paper P, and the force for pressing the paper is released.

9. 发明专利

JPH04358140A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH04358140A
公开(公告)日：1992-12-11
申请号：JP15972691
申请日：1991-06-04
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03B27/62 , G03G15/00 , G03G15/04
摘要： PURPOSE:To prevent operability from being deteriorated because an operation board, etc., is covered by an original part by providing a means for supporting the original part which projects from an original platen. CONSTITUTION:An image forming device where copying and reading are executed in a state where the original O is placed on the original platen 2 is provided with the means 10 for supporting the original part Ob which projects from the platen 2. The means 10 for supporting the original part Ob which projects from the platen 2 is changed to a state where it is overhung from an image forming device main body or the platen 2 toward the outside, and a state where it is folded and housed in the image forming device main body or the platen 2. The platen 2 is set as a fixed type original platen or a moving system original platen with respect to the image forming device. Therefore, deviational moving force caused by the hanging-down force of the original part which projects to the outside does not act on the original placed on the platen 2, and the original O is completely and stably pressed to be held only by an original pressure plate 3, then it is unnecessary to press the pressure plate 3 further by hand.

10. 发明专利

JPH03233573A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH03233573A
公开(公告)日：1991-10-17
申请号：JP3064790
申请日：1990-02-09
申请人： CANON KK
发明人： AZUMA MASAMUTSU
IPC分类号： G03G21/20 , G03G15/00 , G03G15/20 , G03G21/00
摘要： PURPOSE:To prevent dew condensation on a pressure member by forming an air course which extends from outside the image forming device to outside the image forming device through the periphery of the pressure member of a fixing means. CONSTITUTION:An air hole is bored as an opening part in a separation guide member 24 which guides a recording material after fixation to form the air course at the periphery of a pressure roller 21 with the suction force of a fan 23 as shown by a solid line arrow. Therefore, even if steam from the recording material after fixation is sent nearby the pressure roller 21 while the pressure roller 21 is in a low temperature state, air flowing as shown by the arrow A by the suction of the fan 23 carries steam nearby the pressure roller 21 out of the louver of an outer package cover 25. Consequently, even when the steam from the recording material is sent to the periphery of the pressure roller in the low temperature state, it never stays at the periphery of the pressure roller and is therefore prevented from sticking in drops on the pressure roller.

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