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1. 发明专利

JP2003215956A IMAGE HEATING DEVICE AND IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：JP2003215956A
公开(公告)日：2003-07-30
申请号：JP2003020586
申请日：2003-01-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TERADA HIROSHI , IMAI MASARU , TATEMATSU HIDEKI , TOYODA AKINORI
IPC分类号： G03G15/20 , H05B6/14
摘要： PROBLEM TO BE SOLVED: To dissolve the problem that temperature in a belt is not stably recovered though a warming-up time is shortened in a conventional belt type image heating device. SOLUTION: The temperature of the belt is stably controlled by arranging a thin belt, a pressurizing means for forming a nip on the front surface of the belt by pressure contact with the belt, a heat generating roller which is at least partially conductive and across which the belt is laid so as to be movable and an exciting coil for exciting a contact part between the heat generating roller and the belt externally via the belt. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2002116602A COLOR IMAGE RECORDER 失效
公开(公告)号：JP2002116602A
公开(公告)日：2002-04-19
申请号：JP2001120320
申请日：2001-04-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMOTO HAJIME , TERADA HIROSHI , NAKAMURA MASAHIKO
IPC分类号： G03G15/01 , G03G15/08 , G03G15/16 , G03G21/16 , G03G21/18
摘要： PROBLEM TO BE SOLVED: To provide a color image recorder capable of always stably forming an image even in the case of using a cleaner of a type that a toner image remaining on a transfer belt after transferring the toner image to recording paper is removed by the application of voltage. SOLUTION: The peripheral length of an intermediate transfer belt 3 is set to length considering that it is longer than length obtained by adding length from the abutting part of a transfer roller 5 on a 3rd transfer roller 34 to the abutting part of a cleaning roller 6 on a backup roller 10. Thus, even when the polarity of the voltage applied to the roller 6 is switched immediately after the trailing edge of the toner image formed on the belt 3 passes through the abutting part of the roller 6 on the roller 10, the leading edge of the toner image on the belt 3 does not reach a position where the image is transferred to image receiving paper 39, so that the irregularities in the transferred image on the paper 39 are prevented.

3. 发明专利

JP2001356560A COLOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JP2001356560A
公开(公告)日：2001-12-26
申请号：JP2001138867
申请日：2001-05-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TERADA HIROSHI , YAMAMOTO HAJIME
IPC分类号： G03G21/00 , G03G15/01 , G03G15/16 , G03G15/20 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To make a conventional color electrophotographic device cope with various cases concerning the kind of paper, an OHP color image and mono chrome continuous output without using a large-sized large-capacity fixing device. SOLUTION: By moving image forming units 1Bk, 1C, 1M and 1Y, respective color toner images are superposed and formed on an intermediate transfer belt 32. Then, a toner image is transferred to recording paper through a 2nd transfer roller 36 and fixed by a fixing device 41.The temperature of the fixing device 41 fixing the toner image on the recording paper is kept to a suitable level by changing a distance between adjacent images on the belt 32 consecutively formed by first transfer.

4. 发明专利

JP2001201908A COLOR IMAGE RECORDING DEVICE 失效
公开(公告)号：JP2001201908A
公开(公告)日：2001-07-27
申请号：JP2000385810
申请日：2000-12-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NAKAMURA MASAHIKO , TERADA HIROSHI , YAMAMOTO HAJIME
IPC分类号： G03G15/01 , G03G15/16 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To provide a color image recording device capable of attaining the miniaturization of an intermediate transfer unit and also capable of shortening the printing time. SOLUTION: During the operation of switching image forming units 1Bk, 1Y, 1M and 1C, the rotation of an intermediate transfer belt 32 is stopped or the belt 32 is rotated at a low speed. Thus, by stopping the rotation of the intermediate transfer belt or rotating the belt at low speed during the time when the following image forming unit is moved up to an image forming position so that the previous color image leading end on the intermediate transfer belt may not reach the transfer position before the leading end of the image supplied by the following color image forming unit reaches a transfer position after the following color image forming unit is moved up to an image forming position even in the case of leaving a time of switching the image forming units as it is, a time until the following color image is transferred on to the intermediate transfer belt is shortened. Thus, it is possible to start the printing operation just after the following color image forming unit reaches the image forming position, then, the printing time is shortened.

5. 发明专利

JP2001175051A COLOR IMAGE RECORDER 失效
公开(公告)号：JP2001175051A
公开(公告)日：2001-06-29
申请号：JP2000385799
申请日：2000-12-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NAKAMURA MASAHIKO , TERADA HIROSHI , YAMAMOTO HAJIME
IPC分类号： G03G15/01 , G03G15/16 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To provide a color image recorder that an intermediate transfer unit can be made compact and printing time can be shortened. SOLUTION: The circumferential length of an intermediate transfer belt 32 is set to be >= the length of A+B+C. A is the distance that the belt 32 is moved till it is returned to an image forming traveling state again after the rotation thereof is switched to a stop state or a low-speed traveling state. B is the distance to the tip position of an image on the belt 32 from a position to be transferred on the belt 32 obtained when it is detected by a position detection sensor 60 that the belt 32 arrives at a prescribed position after it is moved. C is the maximum paper size in the paper feeding direction. By setting the circumferential length of the belt 32 to be the minimum length that it travels at the preset speed, the shape of the intermediate transfer unit can be made compact. Thus, the color image recorder can be made compact.

6. 发明专利

JP2001092217A COLOR IMAGE RECORDING DEVICE 失效
公开(公告)号：JP2001092217A
公开(公告)日：2001-04-06
申请号：JP2000269060
申请日：2000-09-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMOTO HAJIME , TERADA HIROSHI
IPC分类号： G03G15/01 , G03G15/16 , G03G21/16
摘要： PROBLEM TO BE SOLVED: To provide a color image recording device that an intermediate transfer part has a structure miniaturized/simplified, and the maintenance property is satisfactory. SOLUTION: An intermediate transfer belt unit 2 is constituted so that an intermediate transfer belt 3 and a first transfer roller 4 composed of an elastic body are housed therein, and it is provided with a pair of rollers 16 for keeping a nipping quantity constant between the intermediate transfer belt 3 and a photoreceptor 11, and moreover contact/separation with/from the photoreceptor 11 is repeated. The image formed on the photoreceptor 11, transferred to the intermediate transfer belt 3, and further transferred on recording paper. The intermediate transfer belt unit 2 is inserted in the device from the front of device and allow the intermediate transfer belt 3 to be arranged opposite to the photoreceptor 11. The intermediate transfer belt 3, is brought in press contact with the photoreceptor 11 from the opposite side of an exposure position on the photoreceptor 11, and the press contact direction of the intermediate transfer belt 3, with respect to the photoreceptor 11 and the press contact direction of the third transfer roller 12 with regard to the intermediate transfer roller 3 are approximately the same direction.

7. 发明专利

JP2001060030A COLOR IMAGE RECORDER 失效
公开(公告)号：JP2001060030A
公开(公告)日：2001-03-06
申请号：JP2000227880
申请日：2000-07-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMOTO HAJIME , TERADA HIROSHI , NAKAMURA MASAHIKO
IPC分类号： G03G15/01 , G03G15/04 , G03G15/16 , G03G21/18
摘要： PROBLEM TO BE SOLVED: To provide a color image recorder hardly damaging the surface of a photoreceptor and having an excellent maintainability. SOLUTION: An image formation unit group 14 is constituted by attachably/ detachably combining and arranging plural image formation units 13 (13C, 13M, 13Y and 13BK) having a developer hopper 23 and the photoreceptor 19 nearly annularly and adjacently to each other. The image formation unit group 14 has a cylindrical space having an optical path changing means at a center part, and is divided into plural individual unit housing spaces having a nearly sector-shaped cross section, and houses the image formation unit 13 in them. The position of an intermediate transfer belt 3 is controlled so that it is not brought into contact with the photoreceptor 19 by moving a first transfer roller 4 at the standstill time of the recorder and it is brought into contact with the photoreceptor 19 by moving the first transfer roller 4 at the time of forming an image. The intermediate transfer belt 3 is positioned at a withdrawal position at the time of the rotating operation of the image formation unit group 14, so that the photoreceptor 19 and the intermediate transfer belt 3 are not brought into contact with each other.

8. 发明专利

JP2000206781A COLOR IMAGE RECORDER 失效
公开(公告)号：JP2000206781A
公开(公告)日：2000-07-28
申请号：JP2000024496
申请日：2000-02-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NAKAMURA MASAHIKO , TERADA HIROSHI , YAMAMOTO HAJIME
IPC分类号： G03G15/01 , G03G15/08 , G03G21/16
摘要： PROBLEM TO BE SOLVED: To provide a color electrophotographic device simple in configuration, capable of obtaining a clear image, excellent in maintainability and small in size. SOLUTION: Plural developing unit groups having different color toner are rotated and moved as a whole, so that they can be successively moved to the same developing position respectively. At the developing position, a developing unit develops an image on a photoreceptor opposed to the unit, and a toner image is successively transferred to an intermediate transfer belt. A developing hopper part in the developing unit is divided to a 1st hopper part 14a and a 2nd hopper part 14b and constituted, so that the toner hopper may be upper at the developing position. A toner concentration sensor 60 and a mechanism for switching driving of toner supply or the stop of operation are installed on a main body side so as to control the toner supply. The photoreceptor and the intermediate transfer belt are formed as interchangeable unit.

9. 发明专利

JP2000081800A COLOR IMAGE RECORDING DEVICE AND INTERMEDIATE TRANSFER UNIT USED FOR THE SAME 失效
公开(公告)号：JP2000081800A
公开(公告)日：2000-03-21
申请号：JP27765999
申请日：1999-09-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMOTO HAJIME , TERADA HIROSHI
IPC分类号： G03G21/00 , G03G15/00 , G03G15/01 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an excellent color image recording device having an intermediate transfer part structured small and simple being supreme in maintenance property and an intermediate transfer belt unit used for the same. SOLUTION: This device is allowed to adopt an intermediate transfer belt unit 3 disposed in freely attachably and detachably with respect to the device main body, and allowed to house an intermediate transfer belt 3 capable of successively transferring respective color image from a photoreceptor 18, and plural rollers 4, 5 and 6 for supporting the intermediate transfer belt 3, in a state of applying tension to this intermediate transfer belt. The device is provided with a housing part for housing the intermediate transfer belt unit 3 made possible to fix the intermediate transfer belt unit 3 on the transfer position and to draw out it in the direction orthogonal to the rotary shaft of the photoreceptor 18.

10. 发明专利

JP2000081796A COLOR IMAGE RECORDING DEVICE AND INTERMEDIATE TRANSFER UNIT 失效
公开(公告)号：JP2000081796A
公开(公告)日：2000-03-21
申请号：JP27765199
申请日：1999-09-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMOTO HAJIME , TERADA HIROSHI , NAKAMURA MASAHIKO
IPC分类号： G03G15/01 , G03G15/16 , G03G21/16
摘要： PROBLEM TO BE SOLVED: To provide an excellent color image recording device having an intermediate transfer part structured small and simple being supreme in maintenance property and an intermediate transfer belt unit used for the same. SOLUTION: This intermediate transfer body unit 2, being arranged opposite to a photoreceptor 11, allowed to house an intermediate transfer body 3 capable of successively transferring respective color image from the photoreceptor 11, and plural rollers 4 and 5 for supporting the intermediate transfer body 3, is housed in the device main body in a state of being freely attached and detached in the direction orthogonal to the rotary shaft of the photoreceptor 11. The intermediate transfer body unit 2 is, provided with a first transfer roller 4 opposing the photoreceptor 11 and a second transfer roller 5 opposing a third transfer roller 19, and the intermediate transfer body 3 is, supported by plural rollers including the first transfer roller 4 and the second transfer roller 5. They are housed in a housing covering the surface of the intermediate transfer body 3 except the transfer areas of the rollers 4 and 5.

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