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公开(公告)号：JPH10164299A
公开(公告)日：1998-06-19
申请号：JP33745496
申请日：1996-12-03
Applicant: CANON KK
Inventor： SHIROGATA JIRO
Abstract: PROBLEM TO BE SOLVED: To provide an image reader whose maintenance is easy where an original platen is cooled efficiently with a simple configuration. SOLUTION: An axial fan 60 and a duct 61 are provided to the upper part of a pressing plate 40. The duct 61 is provided with an opening 63 that is open/ closed, and the opening 63 is closed when the pressing plate 40 is nearly in close contact with an original platen glass 31. A switch 64 is provided to the reader, which detects whether or not the pressing plate 40 is nearly in close contact with the original platen glass 31. In the case of reading the image of a sheet original, the axial fan 60 flows a cooling wind to the upper face of the pressing plate 40 and a fan 65 is not in operation. In the case of using a stereoscopic original, a cover 62 is open and the cooling wind is directly blown onto the upper face of the original platen glass 31 through the opening 63. In the case that the pressing plate 40 is not in close contact with the original platen glass 31 in the mode with a tight temperature rising, the fan 65 is in operation as an auxiliary fan.
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公开(公告)号：JPH1195513A
公开(公告)日：1999-04-09
申请号：JP25858897
申请日：1997-09-24
Applicant: CANON KK
Inventor： SHIROGATA JIRO
Abstract: PROBLEM TO BE SOLVED: To provide an image forming device in which a long axial machine screw can be arranged to an efficient position without increasing the labor and time at the time of maintenance. SOLUTION: In this image forming device provided with a body frame, a drum unit which is carried drawable from the body frame and a long axial machine screw 59 for fixing the side surface on the side opposite to that in a drawing direction of the drum unit on the body frame by the operation from the side in the direction of drawing the unit, the long axial machine screw 59 is carried in a partition plate 49 which is timely removed at maintenance of the drum unit. Thus, the machine screw 59 comes out of the drum unit, together with the partition plate 49 removed at the time of maintainance of the drum unit, so that the long axial machine screw 59 can be arranged at the efficient position without increasing the labor and time at the time of the maintenance.
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公开(公告)号：JP2001166559A
公开(公告)日：2001-06-22
申请号：JP34861399
申请日：1999-12-08
Applicant: CANON KK
Inventor： SHIROGATA JIRO
IPC: G03G15/02
Abstract: PROBLEM TO BE SOLVED: To provide an image forming device where a good image formation can be carried out by eliminating image failure due to metallic powder with a simple constitution. SOLUTION: In the image forming device provided with an image carrier carrying a latent image, a developing means developing the latent image and a unit that can be slid along a guide member with respect to a device main body, the unit is characterized in that it is provided with a frame of a conductive body and a sliding part consisting of a non-conductive body is provided on at least one of the frame or the guide member.
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公开(公告)号：JPH11143185A
公开(公告)日：1999-05-28
申请号：JP30730997
申请日：1997-11-10
Applicant: CANON KK
Inventor： SHIROGATA JIRO
Abstract: PROBLEM TO BE SOLVED: To provide an image forming device capable of stably obtaining an excellent image over a long period without requiring maintenance. SOLUTION: This image forming device having a corona electrifier 2 for electrifying a photoreceptor drum (image carrier) 1 is constituted by providing an air feeding duct (wind sending means) 45 feeding the clean air in the corona electrifier 2 and the exhausting duct (evacuating means) 51 for exhausting the air in the corona electrifier 2, so that a discharging wire 43 of the corona electrifier 2 is included in mid-way of a flowing path leading from the air feeding duct 45 to the exhausting duct 51, and a section in the flowing path lying along the photoreceptor drum 1 at a close range is not included on the downstream side of the discharging wire 43. In this way, the soiling prevention of the discharging wire 43 by blowing the clean air and the deterioration prevention of the photoreceptor drum 1 surface by exposure of ozone generated from the discharging wire 43 are made compable with each other, therefore the excellent image can be obtained over a long period without requiring the maintenance.
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公开(公告)号：JPH09119499A
公开(公告)日：1997-05-06
申请号：JP27426395
申请日：1995-10-23
Applicant: CANON KK
Inventor： SHIROGATA JIRO
Abstract: PROBLEM TO BE SOLVED: To improve the smooth movement and durability of a carriage by a simple structure. SOLUTION: At least two projections 7a, 7b are arranged to a carriage 3, in a carriage moving mechanism or a corona electrical charging apparatus 30 equipped with the carriage moving mechanism, which is formed by including the carriage 3 having a screw 6 formed by forming a spiral groove 6a around a round shaft and a projection engaged with the spiral groove 6a of the screw 6, and by which the carriage 3 is moved along the screw 6 by rotatively driving the screw 6. The carriage 3 is reciprocatedly moved along the screw 6, however, thrust force is developed alternately from the projections 7a, 7b positioned in the forward of the advancing direction of the carriage 3 in a reciprocating process so that a moment in a direction for sufficiently keeping the straight advancing performance of the carriage 3, is always acted on the carriage 3, therefore, the smooth and effective movement of the carriage 3 can be realized by a simple structure.
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Patent Agency Ranking
公开(公告)号：JP2010224451A
公开(公告)日：2010-10-07
申请号：JP2009074289
申请日：2009-03-25
Applicant: CANON KK
Inventor： FUJIWARA YUKIHIRO , SHIROGATA JIRO , MAEDA YORITSUGU , NAKAGAKI JUN , ARATA SATOSHI , KANAI MASARU , NAKAZATO ATSUSHI
Abstract: PROBLEM TO BE SOLVED: To reduce color misregistration by highly accurately controlling the speed of a belt body. SOLUTION: The image forming apparatus includes: a photoreceptor drum on which a toner image is formed by an electrophotographic image forming process; a belt-like rotating body stretched to be laid between at least two or more rollers and constituting a transfer part by being abutted on the photoreceptor drum; and a speed detecting means detecting the speed of the belt-like rotating body. The image forming apparatus further include: a housing which supports at least one roller; and a means for adjusting the alignment of the housing which supports the roller, wherein the speed detecting means is supported and disposed in the housing which supports the roller. COPYRIGHT: (C)2011,JPO&INPIT
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公开(公告)号：JP2006323154A
公开(公告)日：2006-11-30
申请号：JP2005146528
申请日：2005-05-19
Applicant: CANON KK
Inventor： TAKEMATSU KOJI , SHIROGATA JIRO , OTAKA HISASHI , KOSHIDA KOHEI , MANABE KENICHI , MIYAZAWA HIDEAKI , OZASA HIDEAKI , YAMANAKA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of performing printing with high image quality by preventing abnormality such as the shift of an image transferred to sheet material by adjusting so that the sheet material being conveyed may not cause deviation in feed amount at both ends in a sheet width direction. SOLUTION: A guide member comprising secondary transfer feeding guides 1 and 2 guiding the sheet material S being recording paper is provided in a section between resist rollers 7 and 8 arranged on the upstream side of the conveying path of the sheet material S and secondary transfer rollers 4 and 5 arranged on the downstream side thereof. One secondary transfer feeding guide 1 has a sheet straightening plate 20 (movable part) adjusting the front and rear of the sheet by moving an abutting part so that the leading edge of the sheet material S may be parallel with the sheet width direction orthogonal to a conveying direction, and a part of the plate becomes a reforming part 21 and abuts on the sheet material S being conveyed. The sheet material S is adjusted so that a difference between both right and left ends, that is, a difference between the front and the rear may not be caused on the leading edge, and an image carried on the image carrier of an image forming part is transferred to an intermediate transfer belt 3, and image shift is restrained when the transferred image is collectively transferred to the sheet material S. COPYRIGHT: (C)2007,JPO&INPIT
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公开(公告)号：JP2000089559A
公开(公告)日：2000-03-31
申请号：JP25853598
申请日：1998-09-11
Applicant: CANON KK
Inventor： SHIROGATA JIRO
IPC: G03G15/08
Abstract: PROBLEM TO BE SOLVED: To maintain an excellent image by preventing metallic powder produced in the inside of an image forming device from entering the inside of a developing unit and preventing an image defect from being caused. SOLUTION: This image forming device is provided with an image carrier 1 whose image carrying surface is moved and a developing container 73 having a developer carrier facing the carrier 1 and carrying developer so as to develop the image at the moving image carrying surface and holding the developer supplied to the carrier 1. Besides a member 100 having magnetic force is proximately arranged at a more upstream side where the image carrying surface is moved than the position of the container 73 where the developer carrier and the carrier 1 are opposed.
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公开(公告)号：JPH11327397A
公开(公告)日：1999-11-26
申请号：JP12753298
申请日：1998-05-11
Applicant: CANON KK
Inventor： SHIROGATA JIRO
Abstract: PROBLEM TO BE SOLVED: To obtain an image forming device which pulls down, without affecting high-quality image formation, a toner accumulation sticking to a waste-toner carrying path or screw member, and thereby, prevents, in advance, waste-toner carrying failure caused by the sticking toner accumulation. SOLUTION: The image forming device has an image carrier, a cleaner 6 for cleaning the toner-image formation surface of the image carrier, a cleaner case (waste-toner carrying path) 60 for carrying waste toner recovered by the cleaner 6, and a waste-toner carrying screw (screw member) 66 for carrying the waste toner. In the case, a striking member (impact means) 101 is provided for exerting an impact force on the cleaner case 60 or waste-toner carrying screw 66, and the operation of applying the impact by the striking member 101 is carried out only when an image is not formed on the image carrier.
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公开(公告)号：JPH096144A
公开(公告)日：1997-01-10
申请号：JP17161995
申请日：1995-06-15
Applicant: CANON KK
Inventor： SHIROGATA JIRO , SUZUKI HAJIME
IPC: G03G15/16
Abstract: PURPOSE: To accurately and easily extend and stretch a dielectric sheet by installing an adhesive member at a position adjacent to the dielectric sheet and more inside in the radial direction than the inside surface of the dielectric sheet cylindrically extended. CONSTITUTION: A pair of ring members 40 and 41 is freely rotatably arranged on a fixed shaft 44, and both ring members 40 and 41 are driven so as not to be relatively rotated, but to be synchronously rotated. And also, the adhesive member 46 attached to the shaft 44 is arranged to be fixed between both ring members 40 and 41. The member 46 is positioned a little bit on the more inside (in the radial direction) than the outer circumferential surfaces of the members 40 and 41, and formed out of an insulating material so that an adverse effect may not be given to the work of the dielectric sheet 43. And, the leading edge of the sheet 43 is positioned so as to agree with the member 46, and then, the sheet 43 is stuck to the outer circumference of the ring members 40 and 41 with a double coated adhesive tape, etc., installed on the leading edge, thereafter, the member 40 and 41 are rotated so that the sheet 43 may be wound around, then, the trailing edge of the sheet is overlaid and stuck on the leading edge of the sheet.
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