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1. 发明专利

JP2002139957A IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD 失效
公开(公告)号：JP2002139957A
公开(公告)日：2002-05-17
申请号：JP2000333488
申请日：2000-10-31
申请人： CANON KK
发明人： OKUMA KEIKO
IPC分类号： G03G21/00 , G03G15/00 , G03G15/36 , H04N1/00
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus and an image forming method which enable the copying of the original image of a previous page or a next page on the non-image surface of a one-sided original without causing miscopying when sorting operation of the one-sided original, and the effective reuse of the one-sided original to be discarded essentially as double-sided copying paper. SOLUTION: When the number of copies is one in the case of performing the double- sided copying of the one-sided original, only the image of the even-numbered sheet of the one-sided original is read, and then the one-sided original ejected to an original ejection tray is stacked on a manual feeding tray as it is, and the read image of the even-numbered sheet is copied on the non-image surface of the odd-numbered sheet of the one-sided original, and the even-numbered one-sided original is ejected as it is. When the number of copies is two, all the images of the one-sided original are read, and then the one-sided original ejected to the original ejection tray is stacked on the manual feeding tray as it is, and the read image of the even-numbered sheet being the next page is copied on the non-image surface of the odd-numbered sheet of the one-sided original, while the read image of the odd-numbered sheet being the previous page is copied on the non-image surface of the even-numbered sheet of the one-sided original.

2. 发明专利

JP2000229730A SHEET SUPPLY DEVICE AND PICTURE IMAGE FORMATION DEVICE WITH THIS DEVICE 失效
公开(公告)号：JP2000229730A
公开(公告)日：2000-08-22
申请号：JP3343899
申请日：1999-02-10
申请人： CANON KK
发明人： OKUMA KEIKO , TAMURA MASASHIGE
IPC分类号： B65H1/00 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To display size of sheet and prevent operational error of a mechanism indicating size of sheet and loss of a part in a sheet supply device. SOLUTION: This sheet supply device is provided with a sheet loading means capable of loading a plurality of kinds of sheets, a size display means 20 which has a size display part 5 provided in a main body and a size plate 4 displaying size of sheet in the size display part by changing a mounting condition for the main body to display size of sheet loaded on the sheet loading means, and a size indication means 21 which performs different operations depending on a mounting condition of the size plate to inform size of sheet loaded on the sheet loading means.

3. 发明专利

JPH10282791A DEVELOPING DEVICE 失效
公开(公告)号：JPH10282791A
公开(公告)日：1998-10-23
申请号：JP8809997
申请日：1997-04-07
申请人： CANON KK
发明人： SAKAMI YUJI , HIROBE FUMITAKE , MATSUZAKI SHIGERU , OKUMA KEIKO
IPC分类号： G03G15/09 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a developing device capable of attaining complete sealing against a developer by using magnetic brushes. SOLUTION: The developing device comprises a developing container, a developer carrier 10 having a magnetic field generating means for forming a repulsing magnetic pole and rotating in a state where the developer is held, and magnetic members provided at the end parts of the developer carrier 10, with fixed gaps to the periphery of the carrier 10. In such a case, which the fixed gaps to the periphery of a part of the carrier 10 are formed, on the far end part sides from the position of the magnetic members plate-like magnets 26 magnetized with plural alternate magnetic poles, N and S, on the surfaces are arranged. The respective magnetic pole N or S of the plate-like magnet 26 is arranged so that the direction of the boundary line is the direction of the sum of a vector that indicates the carrying direction of the developer and a vector being in parallel with the axial direction of the rotation of the carrier 10 and going to the inside of the developing container and the direction where an inclination to the carrying direction of the developer is 5 deg.

4. 发明专利

JPH07108722A IMAGE FORMING APPARATUS 失效
公开(公告)号：JPH07108722A
公开(公告)日：1995-04-25
申请号：JP25663893
申请日：1993-10-14
申请人： CANON KK
发明人： TAKEDA AKIO , TAKADA HIDEAKI , MUNAKATA ATSUSHI , OKUMA KEIKO , NOMURA AKIHIRO
IPC分类号： B41J2/01 , B41J11/48 , B41J13/00 , B65H11/00 , B65H35/06
摘要： PURPOSE:To provide an image forming apparatus which can record a long material to be recorded even without using a rolled sheet. CONSTITUTION:A long sheet S' is recorded, an apparatus is so set as to supply the sheet S' from an outlet 10 of a delivery tray 11 side, to reversely drive exhaust roller pair 9 and conveying roller pair 7 to convey it onto a stage 13, allowing a front end of the sheet to protrude from an opening 12, and to dispose a rear end of the sheet at a recording position. The pair 9 and the pair 7 are forwardly driven to convey the sheet S', an ink jet recorder 3 is simultaneously operated to form an image, and the sheet S' in which the image is formed is discharged from the outlet 10 to the tray 11.

5. 发明专利

JPH0732687A RECORDING DEVICE 失效
公开(公告)号：JPH0732687A
公开(公告)日：1995-02-03
申请号：JP19798593
申请日：1993-07-15
申请人： CANON KK
发明人： OKUMA KEIKO
IPC分类号： B41J13/00 , B41J13/10 , B65H3/44
摘要： PURPOSE:To improve the conveying properties of sheet material inserted in the recording device concerned to a recording means when manual paper-feeding is carried out through the delivery port of cassette paper feeding. CONSTITUTION:In a constitution, in which the changing-over between two systems of paper path for cassette paper feeding and for manual insert paper feeding is performed by vertically moving in interlocking a manual insert guide 24a and a changing-over guide 30 with each other, a holding member 12 for holding the changing-over guide 30, which is released for raising, further at the raised position is provided on a paper feeding shaft 1a and, at the same time, the releasing of the raised position of the changing-over guide 30 can be made possible by paper feeding action.

6. 发明专利

JP2003114577A DEVELOPING UNIT AND IMAGE FORMING DEVICE HAVING THE SAME 审中-公开
公开(公告)号：JP2003114577A
公开(公告)日：2003-04-18
申请号：JP2001310131
申请日：2001-10-05
申请人： CANON KK
发明人： OKUMA KEIKO , SEKIGUCHI HAJIME
IPC分类号： G03G21/20 , G03G15/00 , G03G15/08 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To prevent an increase in the temperature of developer, an image defect caused by fusion, and failure in the operation of a developing unit. SOLUTION: Inside a developer container, a heat-absorbing part is in contact with a member to be cooled. A heat radiation part is provided with a cooling means disposed outside the area of a transfer member in the view seen from the top of the image forming device. The member to be cooled is at least an agitator, developing sleeve, or developing blade. The heat radiation part of the cooling means is provided with a means that sends a flow of air. A heat pipe is used as the cooling means.

7. 发明专利

JP2000203728A SHEET MATERIAL FEEDER AND PICTURE FORMING DEVICE 失效
公开(公告)号：JP2000203728A
公开(公告)日：2000-07-25
申请号：JP460899
申请日：1999-01-11
申请人： CANON KK
发明人： OKUMA KEIKO
IPC分类号： B65H3/06
摘要： PROBLEM TO BE SOLVED: To obtain a sheet material feeder capable of cleaning and replacing a pickup roller, feed roller, and a retard roller in a short time. SOLUTION: A feed unit 302, having a pickup roller 304, feed roller 305-1, and a retard roller 305-2, is mounted to be turnable about support shafts 303-1, 303-2 relating to a cassette 301. The cassette 301 is drawn out of a picture forming device main unit 400, when the feed unit 302 is turned from a position as shown by a continuous line in the drawing to a position as shown by an imaginary line in the drawing, visibility of each roller 304, 305-1, 305-2 is improved, so that cleaning and replacement can be performed in a short time.

8. 发明专利

JPH11236135A SHEET FEED DEVICE AND IMAGE FORMING DEVICE PROVIDED THEREWITH 失效
公开(公告)号：JPH11236135A
公开(公告)日：1999-08-31
申请号：JP3944598
申请日：1998-02-20
申请人： CANON KK
发明人： OKUMA KEIKO
IPC分类号： B65H3/06
摘要： PROBLEM TO BE SOLVED: To easily regulate height difference of a sheet delivery part and prevent paper folding or paper clogging from generating by supporting a feed means feeding a sheet vertically movably against a sheet loading means loading a plurality of sheets. SOLUTION: A paper feed part 7 as the feed means of a sheet feed device 4 is loaded on a compression spring 24 supported with a casing 8, and it is held vertically movably against a sheet loading part 6 through the compression spring 24. In the paper feed part 7, regardless of the height of the casing 8 changed by the number of sheets loaded on a litter plate 5, in short, a sheet loading part 6 fitted to the casing a, the height or the guide part 20 of the paper feed part 7 becomes equal height to the guide part 19 of an image forming device main body 1, and they are automatically aligned. Hereby, without requiring complicated and difficult regulating operation of a delivery part 21, the height of the guide part 20 and the guide part 19 are held on the same position.

9. 发明专利

JPH1073990A DEVELOPING DEVICE 失效
公开(公告)号：JPH1073990A
公开(公告)日：1998-03-17
申请号：JP22975196
申请日：1996-08-30
申请人： CANON KK
发明人： OKUMA KEIKO , KITAYAMA KUNIHIKO
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a developing device which maintains the concentration of toner in a developing vessel regardless of throughout condition. SOLUTION: The developing device includes a toner concentration sensor (toner concentration detecting means) 7 which detects the toner concentration of two-ingredients developer in a developing vessel 9a, and supplies toner according to the detection signal generated by the toner concentration sensor 7. In this case, control coefficient which is used to calculate an amount of the toner supply based on the detection signal is variable according to toner supplying intervals. The control of toner supply to the developing device 9 is variable according to throughput condition, so that the toner concentration in the developing vessel 9a can always keep constant and keep a stable output image concentration regardless of throughout condition.

10. 发明专利

JPH0812114A SHEET FEEDER AND IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0812114A
公开(公告)日：1996-01-16
申请号：JP14635394
申请日：1994-06-28
申请人： CANON KK
发明人： OKUMA KEIKO
IPC分类号： B41J13/00 , B65H1/04 , B65H3/56 , G03G15/00
摘要： PURPOSE:To provide a sheet feeder by which operability in feeding a small-sized and highly rigid sheet is improved and which can contribute to downsizing of a device at low cost. CONSTITUTION:A sheet feeder is provided with a cassette 4 capable of loading and housing plural sheets, a feeding roller 5 to feed the sheets from the cassette 4 and a separating means to separate the sheets fed by the feeding roller 5 one by one. The cassette 4 is provided with a movable side regulating plate 16 to regulate the sheet end, and the separating means is provided with a separating claw 14 and a claw support member 15 to movably support the separating claw 14. The claw support member 15 is movably constituted by following a movement of the side regulating plate 16, and a stopper 12a is arranged on a sheet loading plate 12 so as to regulate a movement of the claw support member 15 when the side regulating plate 16 is moved to a small size position.

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