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1. 发明专利

JP2001348146A WEB CARRYING DEVICE 失效
公开(公告)号：JP2001348146A
公开(公告)日：2001-12-18
申请号：JP2000174196
申请日：2000-06-06
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： SHIRASAWA SATOSHI , NAKAJIMA ISAO , OTOME YUKIO
IPC分类号： G03G15/16 , B65H5/02 , B65H23/032
摘要： PROBLEM TO BE SOLVED: To provide a low-cost belt carrying device having a belt position detecting means for precisely detecting the positional change of a belt without causing malfunction due to contamination with dust, etc. SOLUTION: A belt position output device is located at both edges of the belt for detecting the positional change of the belt in the cross direction. The belt position output device is put in contact with the belt for detecting the position of the belt and amplifying and outputting the position information for the belt with a link. Then, the positional change of the belt is detected by using a belt positional change detector for detecting the amplified position information for the belt.

2. 发明专利

JP2001142262A DOUBLE-SIDED PRINTER 失效
公开(公告)号：JP2001142262A
公开(公告)日：2001-05-25
申请号：JP32504499
申请日：1999-11-16
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KINOSHITA YASUSHI , SATO KAZUYASU , ASHIBA KENJI , NAKAJIMA ISAO , YAMAZAKI AKIHIKO
IPC分类号： G03G15/00 , G03G15/01
摘要： PROBLEM TO BE SOLVED: To provide a double-sided printer by which one processing both-side printing is realized at high speed by preventing scattering found in terms of powder toner and reverse transfer. SOLUTION: A heating means to heat a toner image transferred on recording paper from a front face is provided in the carrying path of the recording paper reaching a fixing unit from an image forming means. Also, a cooling means to cool and solidify the toner image is provided in the carrying path of the recording paper reaching the fixing unit from the heating means.

3. 发明专利

JPH11202658A FIXING DEVICE FOR IMAGE RECORDER 失效
公开(公告)号：JPH11202658A
公开(公告)日：1999-07-30
申请号：JP369098
申请日：1998-01-12
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： YAMAZAKI AKIHIKO , YOKOGAWA HIDEHO , NAKAJIMA ISAO , AKAI MUNEYOSHI , KUWABARA AKITOMO , FUKUDA HIROMITSU
IPC分类号： G03G15/00 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device for a both side recorder capable of sufficiently heating a recording material even with the both side recorder for transporting the recording material at a speed of >=150 mm/sec and is capable of obtaining good fixed toner images on both surfaces of the recording material. SOLUTION: This device has preheating means 12 for heating the respective front and rear surfaces of the recording material 7 and heating rollers 11a, 11b which exist on the downstream side in the transporting direction of the recording material with respect to the preheating means 12 and are arranged to face each other contactably with the respective front and rear surfaces of the recording material 7. These heating rollers 11a, 11b comprise cylindrical arbors 21, releasable rubber layers 22 which are disposed on these arbors 21 and heat sources 23 which are disposed within the arbors 21. The releasable rubber layers 22 are formed on the arbors 21 as rubber layers 22 satisfying a layer thickness 1 to 10 mm, hardness 30 to 80 degrees, thermal conductivity 1×10 cal/cm.sec. deg.C.

4. 发明专利

JPH10268682A FIXING DEVICE 失效
公开(公告)号：JPH10268682A
公开(公告)日：1998-10-09
申请号：JP7305497
申请日：1997-03-26
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： FUKUDA HIROMITSU , OTSUKA HIDEFUMI , YOKOGAWA HIDEHO , NAKAJIMA ISAO , HIROSE YOJI
IPC分类号： G03G15/00 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To improve the fixing performance by respectively winding recording paper on two heating and pressure rollers without widening the contact surface of the heating and pressure rollers for fixing every surface of the recording paper in the case of simultaneously performing the fixing of both surfaces for fixing in case of both-side printing. SOLUTION: Unfixed toner images held on the first surface and the second surface of the recording paper 3 are fixed by respectively bringing the first surface (the second surface) of the recording paper 3 into contact with the heating and pressure roller 1a and the second surface (the first surface) into contact with the heating and pressure roller 1b using two opposed heating and pressure rollers 1a and 1b and respectively winding the recording paper on two heating and pressure rollers 1a and 1b. Thus, the unfixed toner image held on the front and rear of the recording paper receives sufficient quantity of heat and is dissolved by respectively winding the recording paper on the heating and pressure rollers. Thus, the occurrence of a defective image so called offsetting is eliminated, so that sufficient fixing intensity is obtained.

5. 发明专利

JPH10181969A IMAGE RECORDER 失效
公开(公告)号：JPH10181969A
公开(公告)日：1998-07-07
申请号：JP34930796
申请日：1996-12-27
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OBATA SHIGERU , OTSUKA HIDEFUMI , NAKAJIMA ISAO , SHOJI YUTAKA , TAKAHAGI HIROSHI
IPC分类号： B41J11/42 , B41J29/00 , B65H5/00 , B65H23/038 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To prevent any attraction from working on a compensating roller of a paper position compensation means due to paper's electrostatic charge by installing a static eraser eliminating the paper's electrostatic charge, at the upstream side of a paper cross direction position compensating means. SOLUTION: A paper position compensation means 6 compensates any dislocation in a sheet of paper 1 by making a difference in conveying force acting in the cross direction of this paper 1, by making a difference in the pressing force acting on both ends of compensating rollers 601 and 602 installed in the whole width of the paper 1. The delivered paper 1 is loaded in a roller part of the paper position compensation means 6 via an auxiliary roller 810, a table 82, and another auxiliary roller 812 and further making its end go along with a paper guide 3 regulating the paper cross direction. At this time, the paper 1 is loaded being eliminated any electrostatic charge on it by a static eraser 13 installed at the upstream side of this paper position compensation means 6. Thus, roller frictional conveyance of this continuous paper is favorably performed.

6. 发明专利

JPH09188444A IMAGE RECORDING DEVICE 失效
公开(公告)号：JPH09188444A
公开(公告)日：1997-07-22
申请号：JP82896
申请日：1996-01-08
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OTSUKA HIDEFUMI , OBATA SHIGERU , MATSUNO JUNICHI , TSUJI HOKYO , YOKOGAWA HIDEHO , NAKAJIMA ISAO , AKAI MUNEYOSHI , HIROSE YOJI
IPC分类号： B65H20/02
摘要： PROBLEM TO BE SOLVED: To reliably convey a continuous recording substance having no perforation through roller friction, in an image recording device to form an image on the continuous recording substance through an electrophotographic system. SOLUTION: A feed roller mechanism consisting of a driven roller 506 positioned at the two ends outside an image transfer region of a continuous recording body 100; and a drive roller 508 having length being the overall width of the continuous recording body 100 is arranged downstream from a transfer corotron of which a transfer part consists. Since friction conveyance is effected by rollers 506 and 508 making contact with the two ends outside an image transfer region of the continuous recording body 100, when a toner image is transferred from an image recording part 402 to form a toner image to a continuous recording body 100, reliable transfer is effected through roller friction against the attraction force of the image recording part 402 and the continuous recording body 100, and friction conveyance is practicable without the non-fixed image of the continuous recording body 100.

7. 发明专利

JPH03182760A IMAGE RECORDER, IMAGE RECORDING MEDIUM AND DISPLAY DEVICE 失效
公开(公告)号：JPH03182760A
公开(公告)日：1991-08-08
申请号：JP32143189
申请日：1989-12-13
申请人： HITACHI LTD , HITACHI METALS LTD , HITACHI KOKI KK
发明人： MUROI KATSUMI , OKUNA KENJI , NAKAJIMA ISAO , OUCHI KATSUFUMI , IIMURA TSUTOMU , KOJIMA RYOJI
IPC分类号： B41J2/42 , G03G5/02 , G03G15/00 , G03G15/05 , G03G15/22
摘要： PURPOSE:To stably obtain bright images even when humidity changes drastically by forming a porous dielectric layer on the surface of the conductive member on the dielectric surface layer of a recording medium and packing hydrophobic dielectric materials into the holes of the dielectric layer. CONSTITUTION:A conductor 11 which can be anodized is used as the recording medium 1 and the surface of this conductor 11 is anodized. Further, the hydrophobic dielectric materials 12a, 12b having the softening point hither than the glass transition point of a toner are packed into the many holes formed within the anodized layer to form the dielectric layer 12. The surface of the conductor 11 as the recording medium 1 is otherwise subjected to thermal spraying and is thereby formed with the dielectric layer 12 of an oxide, carbide, nitride, etc., having wear resistance and thereafter, the hydrophobic dielectric materials 12a, 12b having the softening point higher than the glass transition point of the toner are packed into the holes in the dielectric layer 12. The fluctuation in the surface resistance of the recording medium is lessened in this way and the bright images are formed even when the recording medium is used in the environment from a high humidity to low humidity.

8. 发明专利

JPH10228189A HEATING DEVICE 失效
公开(公告)号：JPH10228189A
公开(公告)日：1998-08-25
申请号：JP3055497
申请日：1997-02-14
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： FUKUDA HIROMITSU , OTSUKA HIDEFUMI , HIRAOKA TSUTOMU , YOKOGAWA HIDEHO , NAKAJIMA ISAO , HIROSE YOJI , YAMAZAKI AKIHIKO
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To increase efficiency when both surfaces of a moving body to be heated are heated in a non-contact state. SOLUTION: This heating device is provided with heating belts 1a and 1b which are moved in a state where they approach/face a moving developed recording paper 6, along the carrying path of the recording paper 6, and halogen lamps 4 are arranged inside belt driving rollers 2a (2b) for driving the heating belts 1a and 1b, to heat them with heat generated by the halogen lamps 4. Then, the recording paper 6 is heated with the heating belts 1a and 1b adjusted to fixed temperatures. At this time, the carrying speed of the recording paper 6 is set to be the same as the moving speeds of the heating belt 1a and 1b. The heating belts 1a and 1b may be heat-generated by themselves.

9. 发明专利

JPH0436769A IMAGE RECORDER 失效
公开(公告)号：JPH0436769A
公开(公告)日：1992-02-06
申请号：JP14142290
申请日：1990-06-01
申请人： HITACHI LTD , HITACHI METALS LTD , HITACHI KOKI KK
发明人： OHARA SHUNICHI , OKUNA KENJI , OBA SAYOKO , NAKAJIMA ISAO , OUCHI KATSUFUMI , IIMURA TSUTOMU , KOJIMA RYOJI
IPC分类号： G03G15/05 , G03G15/00
摘要： PURPOSE:To obtain a high-quality toner image having high black density without fogging by providing a magnetic field generating means for generating a magnetostatic field in a hollow sleeve consisting of non-magnetic material which is provided on a recording electrode side and on a downstream side in the recording direction of the recording electrode. CONSTITUTION:The magnetic field generating means 11 for attracting a non-image toner which is just after passing through a very small gap part to the outer periphery of the sleeve 3 and a means for turning the sleeve 3 are provided in the cylindrical sleeve 3 consisting of the non-magnetic material which is provided in a space formed by the recording electrode 5 and a recording member and on the downstream side in the moving direction of the electrode 5. By the action of the carrying force of the recording member, the means 11 removes the non-image toner which flows out from the very small gap part at the edge of the electrode 5 from the recording member with the edge part of the electrode 5 spatially and temporarily in an instant by overcoming a gravity field, so that charges are not moved from image forming toner which is electrostatically charged to the non-image toner and the high-quality image having distinct image contour and high black density without fogging is obtained.

10. 发明专利

JPS5862069A PRINTER 失效
公开(公告)号：JPS5862069A
公开(公告)日：1983-04-13
申请号：JP16101781
申请日：1981-10-12
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： HOSODA YUUJI , NAKAJIMA ISAO , KUROSAWA MAKOTO , NAKANO HIROSHIGE
IPC分类号： B41J2/515 , B41J9/44 , B41J9/48 , G06K15/06
摘要： PURPOSE:To perform excellent printing even though a printing pattern is changed by controlling a voltage applied to a coil by a controlling means which outputs a control driving signal. CONSTITUTION:A printing data B is inputted into a maximum value circuits 11 in synchronization with clock signals T. The number of the clock signals during the period the printing data B becomes continuously high from the rise of a starting signal A to the rise of a striking signal. A maximum value M is judged and stored in the circuit 11. A function circuit 12 determines a voltage control signal F corresponding to the maximum value 7 based on the function defined in the inside. A voltage control circuit 13 converts a power source voltage E to a driving voltage K which is proportional to a voltage control signal F. A pulse generating circuit 14 generates a pulse W having a specified pulse width in synchronization with the rise of the striking signal. A driving circuit 15 applies the driving voltage K to the coil 4, whose driving is specified, for the period of the pulse width of the pulse W in synchronization with clock signal T and drives a printing hammer 6.

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