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1. 发明专利

JP2002131677A OPTICAL SCANNER 失效
公开(公告)号：JP2002131677A
公开(公告)日：2002-05-09
申请号：JP2000330329
申请日：2000-10-30
申请人： HITACHI KOKI KK
发明人： TATEYAMA SUSUMU , KIYONO MINORU
IPC分类号： B41J2/44 , G02B7/02 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To precisely adjust position of a collimating lens in an optical axis direction in an optical scanner of a small size. SOLUTION: In the optical scanner, a spring means and a screw means are provided as a position adjusting means of the collimating lens in the optical axis direction and further the spring means is provided in a direction perpendicular to the optical axis.

2. 发明专利

JP2001199591A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JP2001199591A
公开(公告)日：2001-07-24
申请号：JP2000005344
申请日：2000-01-14
申请人： HITACHI KOKI KK
发明人： ISHII KENJI , SONOYA MASAYUKI , SHIRAKAWA JUNJI , KIYONO MINORU , ANDO HIDEKI
IPC分类号： B65H5/36 , G03G15/00 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic device capable of preventing the dispersion of a transferring property caused by the difference in ream weight of paper, the failure in conveying the paper, and the stain of a backside of the paper caused by the difference in paper width, reducing production cost, and improving reliability. SOLUTION: This electrophotographic device is provided with a guide member for guiding the paper to a transfer point, and a conductive member mounted on the guide member through a spring member, and having a conductive member near a photosensitive drum surface for narrowing a gap when the thin paper is used, and widening the gap when the thick paper is used in accordance with the ream weight of the paper.

3. 发明专利

JP2001097610A ELECTROPHOTOGRAPHY TYPE PRINTER 失效
公开(公告)号：JP2001097610A
公开(公告)日：2001-04-10
申请号：JP28245999
申请日：1999-10-04
申请人： HITACHI KOKI KK
发明人： ISHII KENJI , KIYONO MINORU
IPC分类号： B65H9/14 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an electrophotography type printer suppressing vibration when a paper sheet rear end is removed from a timing roller and a resist roller so as to provide an excellent image without transfer blurring. SOLUTION: A relationship, Vf>Vo>=Vr>Vt, is satisfied between a conveying speed Vt of timing rollers 1a, 1b, a conveying speed Vr of resist rollers 2a, 2b, a circumferential speed Vo of a photosensitive drum 3, and a conveying speed Vf of a conveying device 5. Relationships, δr>=Lp((Vr-Vt)/Vt), δo>=Lp((Vf-Vo)/Vo), are satisfied between an amount δr of paper deflection formed in the paper sheet abutting to the resist roller 2a, 2b, an amount δo of paper deflection in a photosensitive drum insertion part, and a paper sheet length Lp.

4. 发明专利

JP2000136059A PAPER FEEDING PATH SWITCHING DEVICE FOR IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000136059A
公开(公告)日：2000-05-16
申请号：JP30988598
申请日：1998-10-30
申请人： HITACHI KOKI KK
发明人： ISHII KENJI , SHIRAKAWA JUNJI , KIYONO MINORU
IPC分类号： B65H29/60
摘要： PROBLEM TO BE SOLVED: To provide a paper feeding path switching device for an image forming device in which a gap between a sheet guide plate constituting a paper feeding path and a sheet guide surface of a gate member is surely secured, jam is reduced and capability to be assembled is improved. SOLUTION: Either a sheet guide plate 10 constituting a first paper feeding path or a surface of a gate member 1 opposed to the guide plate 10 and either a sheet plate 11 constituting a second paper feeding path or the surface of the gate member 1 opposed to the guide plate 11 are provided with projection parts 2, 3 for securing gaps between the sheet guide plates 10, 11 and the gate member 1.

5. 发明专利

JPH1111803A IMAGE RECORDING DEVICE AND SHEET TRANSPORTING METHOD FOR IT 失效
公开(公告)号：JPH1111803A
公开(公告)日：1999-01-19
申请号：JP16410997
申请日：1997-06-20
申请人： HITACHI KOKI KK
发明人： SHIRAKAWA JUNJI , SONOYA MASAYUKI , KIYONO MINORU
IPC分类号： B65H29/58 , B65H85/00 , G03G15/23
摘要： PROBLEM TO BE SOLVED: To provide an image recording device and a method of transporting paper sheets for it capable of preventing drop of the printing speed resulting from the sheet inverting motion in the two-side printing mode. SOLUTION: On the draw-in route 11, two parts of transport rollers 7 and 8 are provided which have driving means 15, 16, 17, 18 independent of one another and are supported rotatable both in the regular and reverse directions according to the respective operating timing, and among them the first roller pair 7 is located downstream of the branch point B of a return path 14 from the draw-in route. The second roller couple 8 is located upstream of the branch point B.

6. 发明专利

JPH09325627A FIXING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH09325627A
公开(公告)日：1997-12-16
申请号：JP14382596
申请日：1996-06-06
申请人： HITACHI KOKI KK
发明人： KIYONO MINORU , ISHIKAWA MASAMI , KAWASAKI KAZUHIKO
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To secure a heating process width (nip width) and pressurizing force, sufficient for fulfilling a great fixing capacity at a high speed and to enable reduction in power consumption and the shortening of the rising time of a device, in a fixing device. SOLUTION: The fixing device is set so that heating by heating elements 8 and pressurization by rollers 4 and 9, required for fixing are separately attained and a path for a heating process by the heating elements 8 is constituted of endless carrying belts 6. For instance, a pair of the endless carrying belts 6 wound on two or more rotatable rollers respectively are used and the certain sides of these belts 6 come into opposite contact with each other. Then, plural heating elements 2 are disposed in one side of one of the belts 6, in a traveling direction, to constitute a heating part, and at least the roller 9 on the downstream side in the heating part, out of the rotatable rollers 9 on the side of the other belt 6 is pressed on the corresponding roller 4 on the side of the heating device 8 by a spring 11, to obtain a pressurizing part.

7. 发明专利

JPH09166928A PRE-FIXATION PAPER CARRYING DEVICE 失效
公开(公告)号：JPH09166928A
公开(公告)日：1997-06-24
申请号：JP32670295
申请日：1995-12-15
申请人： HITACHI KOKI KK
发明人： NAKAMURA TAKEHIRO , KIYONO MINORU , KAWAMOTO MASARU , EBIHARA TAKASHI , NAGAYAMA SHINJI
IPC分类号： G03G15/20 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To keep the paper carrying/sucking pressure constant, irrespective of paper size, to enable a paper to be fed to a fixing device while keeping the paper posture flat and to reduce the generation of wrinkles, by finely adjusting the opening area of an air leak valve installed on a suction box part in accordance with the paper size. SOLUTION: A paper 1 is sucked to a belt 5b by the paper carrying/sucking pressure, then, the paper is carried to a fixing device 11 in accordance with the rotation of the belt 5b. At this time, as for the suction holes 5j formed in the bottom surface of the suction box, the number of closed suction holes is changed in accordance with the size of the paper 1, and as the number of the holes is changed, the paper carrying/sucking pressure is changed. Then, the air leak valve 5k installed on the upper part of the suction box 5f is opened/ closed by a solenoid 5m in synchronism with a paper size detecting mechanism set in a paper feeding part. Thus, even in the case where the size of the paper 1 is changed, the sum of the total area of the suction holes 5j not shut by the paper 1 on the bottom surface of the suction box 5f and the opening area of the air leak part is fixed, then, the paper 1 can be carried in a stable posture.

8. 发明专利

JPH0922233A CLEANER FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH0922233A
公开(公告)日：1997-01-21
申请号：JP17236995
申请日：1995-07-07
申请人： HITACHI KOKI KK
发明人： KIYONO MINORU , NAKAMURA TAKEHIRO
IPC分类号： G03G21/10
摘要： PROBLEM TO BE SOLVED: To provide a cleaner which surely transfers toner, dust, and the like existing between a cleaning brush and a recovery roll. SOLUTION: The cleaning brush 3 is composed of a brush group divided in at least four or more on the circumference. The width of the brush group is equal to or greater than the width of abrasion which is caused by the contact of at least a part to be cleaned with the brushes, and a bias voltage having the opposite polarity of toner is applied it. A bias voltage having the same polarity as that of toner is applied to the brush group which is in contact with the recovery roll, or ground potential is imparted, and, thus, transfer to the recovery roll is ensured.

9. 发明专利

JPH08198477A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH08198477A
公开(公告)日：1996-08-06
申请号：JP1168695
申请日：1995-01-27
申请人： HITACHI KOKI KK
发明人： NAKAMURA TAKEHIRO , KIYONO MINORU , EBIHARA TAKASHI
IPC分类号： G03G15/00 , B65H7/06 , B65H7/14
摘要： PURPOSE: To provide an electrophotographic device, which can prevent the feeding of a paper sheet curled more than the regulation in a paper carrying passage so as to previously prevent the generation of paper jam in the paper carrying passage and which is coupled with a paper sheet curl correcting mechanism so as to perform the stabilized carrying of the paper sheet. CONSTITUTION: A paper sheet 11 is carried in a paper carrying passage by a carrying roller 12 and a pressure roller 13 in the condition that it is curled upward or downward. At this stage, an optical distance sensor 14 provided in the paper carrying passage detects direction and quantity of curl of the paper sheet 11. In the case where the tip of the paper sheet 11 is curled upward, when the tip of the paper sheet 11 passes under the sensor 14, the paper sheet 11 comes closest to the sensor 14 surface, and separated from the sensor 14 surface, as it is carried away. In the case where the tip of the paper sheet 11 is curled downward, the paper sheet 11 is passed in the opposite condition.

10. 发明专利

JPH08194400A FIXING ROLLER AND FIXING DEVICE FORMED BY USING THE SAME ROLLER 失效
公开(公告)号：JPH08194400A
公开(公告)日：1996-07-30
申请号：JP732295
申请日：1995-01-20
申请人： HITACHI KOKI KK
发明人： KANEKO TADAHIRO , UMEDA TAKAO , KIYONO MINORU , NAKAMURA TAKEHIRO
IPC分类号： G03G15/20 , F16C13/00
摘要： PURPOSE: To obtain a fixing roller of a long life type and a fixing device suitable for high-speed fixing by providing the fixing roller with a cylindrical arbor material, a thermosetting resin layer dispersed with conductive power and solid lubricant and a release type resin layer without contg. the conductive powder. CONSTITUTION: The arbor material 4 is formed of metals, such as, for example, aluminum and copper. The surface of the arbor material 4 is provided with the thermosetting resin layer 3 contg. the conductive powder and the solid lubricant. Further, the surface of the thermosetting resin layer 3 is provided with the release type resin layer 2 contg. the solid lubricant and without contg. the conductive powder. Even if, therefore, the release type resin layer 2 wears and the thermosetting resin layer 3 formed thereunder is exposed on the surface of the fixing roller, the release property possessed by the thermosetting resin layer 3 is assured and the continuation of the fixing operation is possible, insofar as the conductive powder dispersed in the thermosetting resin layer 3 is not much exposed on the surface of the fixing roller.

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