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1. 发明专利

JP2003089184A IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：JP2003089184A
公开(公告)日：2003-03-25
申请号：JP2001282568
申请日：2001-09-18
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KINOSHITA YASUSHI , SATO KAZUYASU , OBATA SHIGERU , KUWABARA AKITOMO , OBA TETSUYA
IPC分类号： B41F13/02 , B41F33/06 , B41F33/14 , B41J15/00 , B41J15/04 , B41J15/16 , B65H23/038 , B65H23/04 , B65H23/188 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To solve the problem that since a position of a web in a widthwise direction due to paper carrying is formed in a zigzag manner, when a printing tension is applied, a deviation of the tension occurs and hence web might be broken and since a difference of a zigzag controller to a target position is large, the zigzag control is excessively operated to deviate a lateral tension of the web to a wrinkle to occur or to break. SOLUTION: An image forming apparatus suppresses the tension of the web to a lower value than the printing tension to convey the web until the position of the web converges in the widthwise direction to the target position of the zigzag controller, after the web is charged so that a correcting operation of a zigzag control means is reduced to obtain a good image quality in which no wrinkle or no breakage occurs. Thus, an amount of the web to be lost at a preparing stage before printing is reduced.

2. 发明专利

JPH07237759A PAPER SHEET FEEDING MECHANISM 失效
公开(公告)号：JPH07237759A
公开(公告)日：1995-09-12
申请号：JP2768794
申请日：1994-02-25
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OBATA SHIGERU , MATSUNO JUNICHI
IPC分类号： B41J13/00 , B65H1/24 , B65H3/06 , B65H7/02 , G03G15/00
摘要： PURPOSE:To transfer paper sheets in a stable manner, preventing the troubles of double feed, delay of transfer timing, etc., by keeping the pressing force of a paper feeding roller always constant by detecting the pressing force of the paper feeding roller, rest quantity of the paper sheets, and the paper sheet interval. CONSTITUTION:A paper sheet 2 placed on a table 13 in a hopper is driven out by revolving a paper feeding roller 1 through a gear train 16 installed on the shaft 15 of a transfer roller 14 by revolving the shaft 15, and separation- transferred one by one by the transfer roller 14 and a separating pad 18. In this case, the pressing force applied on the paper sheet 2 in the case where the paper feeding roller 47 drives out the paper sheet 2 is detected by a pressure sensor 19 installed in the table 13 or on the bearing of the paper feeding roller 17, and inputted into a controller 20, together with the rest quantity of the paper sheet 2 by a rest quantity detecting sensor 29 and the detection signal of the paper sheet interval by a paper sheet detecting sensor 28, and control is performed so that the pressing force corresponding to the kind of the paper sheet is always kept constant.

3. 发明专利

JPH06149077A BELT TRANSFER DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE AND THE ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH06149077A
公开(公告)日：1994-05-27
申请号：JP26577292
申请日：1992-10-05
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： MATSUNO JUNICHI , OBATA SHIGERU , MIWA MASATO , UNO KAZUO
IPC分类号： G03G15/16 , G03G15/00
摘要： PURPOSE:To prevent the winding of a form to a photosensitive body and to perform a transfer onto the form with high reliability by making the rotational speed of a photosensitive drum faster than the carrying speed of the form. CONSTITUTION:The form 2 is curved between a carrying roller 18 and a resist roller 13, the bias of the form 2 is straightened and the resist roller 13 is rotated in synchronization with a toner image on the photosensitive drum 3, to carry the form 2. The form 2 is guided to a dielectric belt 6 and sent to a transfer part. The speed of the dielectric belt 6 is controlled so as to be equal to or lower than that of the photosensitive drum 3 within 0.5%. At this time, the form 2 is carried at the same speed as that of the dielectric belt 6. Thus, the speed of the photosensitive drum 3 is set faster than that of the form within 0.5%, so that shearing force can act in a direction where the leading edge of the form 2 is peeled from the photosensitive drum 3, on the contact part of the photosensitive drum 3 with the form 2.

4. 发明专利

JP2002234648A ROTARY PRESS 失效
公开(公告)号：JP2002234648A
公开(公告)日：2002-08-23
申请号：JP2001031689
申请日：2001-02-08
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KINOSHITA YASUSHI , SATO KAZUYASU , OBATA SHIGERU , OBA TETSUYA , KUWABARA AKITOMO , ASHIBA KENJI
IPC分类号： B41F13/00 , B41F13/02 , B41F33/06 , B41F33/14 , B65H23/188
摘要： PROBLEM TO BE SOLVED: To solve the problems in a conventional printing device for conveying a web according to a central criterion that the web is inclined toward one side of each constituent element and runs, thereby increasing meandering and frequency of wrinkle and rupture, according to a one side criterion because travel means of a feeding machine and a winding machine for the web and various sensors must be moved in accordance with a width of the web, the device becomes complicated and cost is increased due to the travel means, and therefor, a running position of the web is set to the one side criterion to simplify the device. SOLUTION: The inclination of a dancer roller is corrected by adjusting right and left loads of the dancer roller minutely to keep right and left tensile forces of the web equal. At this time, right and left load balance of the dancer roller is controlled by adjusting right and left load means minutely and moving a stabilizer to the right and left to change its center of gravity. Moreover, right and left tensile forces of the web and the inclination of the dancer roller are detected and fed back to perform minute adjustment of the right and left load means.

5. 发明专利

JPH1179508A IMAGE RECORDING DEVICE 失效
公开(公告)号：JPH1179508A
公开(公告)日：1999-03-23
申请号：JP24248697
申请日：1997-09-08
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OBATA SHIGERU , OTSUKA HIDEFUMI , YOKOGAWA HIDEHO , NAKAJIMA ISAO , KUWABARA AKITOMO
IPC分类号： B41J15/16 , B65H23/188 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To prevent misalignment of color or printing patterns caused by vibration in the sheet conveying direction in continuous paper such as rolled paper or folded paper. SOLUTION: Continuous paper 1 is led through a speed variation preventing means 2 by means of a drive roller 62 or the like, and is then fed into an image recording part 4a by a tractor 3a. The speed variation preventing means 2 winds the paper onto a pair of upper and lower rollers which are driven by a conveying force for the paper, so as to clamp the same in order to prevent vibration of the paper in the conveying direction. The upper roller 201 is composed of roller parts 21a, 21e arranged widthwise of the paper, and a paper clamping part is rotatably attached to the left and right arms 203, 204 which are rotatably attached by a shaft 207 at their fulcrums. The lower roller is composed of a straight or a crown roller 202 extending over the entire width of the paper. A spring 205 effects a clamping force for the paper. Variation in speed is prevented upstream of the image recording part, thereby it is possible to prevent vibration of the paper in the conveying direction, caused by paper supply motion or the like.

6. 发明专利

JPH10297807A RECORDED BODY CONVEYANCE MECHANISM OF IMAGE RECORDER 失效
公开(公告)号：JPH10297807A
公开(公告)日：1998-11-10
申请号：JP11062097
申请日：1997-04-28
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OTSUKA HIDEFUMI , OBATA SHIGERU , YOKOGAWA HIDEHO , NAKAJIMA ISAO , KUWABARA AKITOMO
IPC分类号： B41J15/00 , B65H27/00 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an image recorder which conveys a continuous recorded body such as paper having a feed hole or sheetlike plastic film in a good condition, by providing a guide roller having a pin to be joined in a feed hole of a recording body. SOLUTION: Since tractors 2a, 2b are provided on the upstream side and the downstream side in the conveyance direction of a recorded body 1 in picture image recording parts 3a to 3d, respectively, the distance between them is long. On the other hand, since rollers in a part which inverts the conveyance direction of the recorded body 1 after toner is transferred on a first face of the recorded body 1 are guide rollers 4a, 4b, the direction of width of the recorded body 1 is regulated at these two sections to produce shift amounts between the tractor 2a and the guide roller 4a and between the tractor 2b and the guide roller 4b so that a shift amount in-the direction of width of the recorded body 1 can be reduced. Moreover, the guide rollers 4a, 4b follow the recorded body 1, but a belt 22 only is driven, thereby reducing inertia mass and causing no deformation of a feed hole of the recorded body 1.

7. 发明专利

JPH1035965A IMAGE RECORDER 失效
公开(公告)号：JPH1035965A
公开(公告)日：1998-02-10
申请号：JP19036496
申请日：1996-07-19
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OBATA SHIGERU , OTSUKA HIDEFUMI , MATSUNO JUNICHI , TSUJI HOKYO , YOKOGAWA HIDEHO , NAKAJIMA ISAO , AKAI MUNEYOSHI , HIROSE YOJI
IPC分类号： B41J11/42 , B65H23/038 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an image recorder by means of a paper loading method which is able to reduce any positional dislocation in the cross direction of paper at a time when the paper is loaded onto a paper conveying part. SOLUTION: This recorder is provided with a member releasing any contact with a compensating roller pair of a paper cross direction position compensation means compensating a paper cross directional position by way of producing a difference in pressing force in the paper cross direction of a conveyor roller pinching a sheet of paper and frictionally conveying it, and the paper 1 is thus conveyed along a member regulating the reference position of a paper end part and, after this paper 1 is pinched between the paired compensating rollers 601 and 602, a paper loading operation is carried out as performing a paper positional compensation with these rollers 601 and 602. Accordingly, since the paper is guided to a paper conveying means along the member regulating the paper cross direction reference position and continuous paper is loaded by the paper cross direction position compensation means, this paper loading can be done as checking any possible slippage from the reference position in the paper cross direction smaller in sofar as possible, and when an image record is carried out as performing a skew compensation continuously afterwards, a speedy positional compensation is made performable.

8. 发明专利

JPH09188441A IMAGE RECORDER 失效
公开(公告)号：JPH09188441A
公开(公告)日：1997-07-22
申请号：JP203196
申请日：1996-01-10
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： B41J11/42 , B41J13/00 , B65H7/14 , B65H9/00 , B65H23/038
摘要： PROBLEM TO BE SOLVED: To detect an end position of paper irrespective of the presence of a feed hole and performated stitches and prevent the occurrence of a section where an image cannot be recorded by arranging a paper position compensation means which receives a signal of a paper position compensation means controller and compensates an end position of paper for recording image on more upstream side in the direction of paper conveyance than an image recording part. SOLUTION: Since image recording paper 1 passes between a paper guide 39 for an upper part in which a knotched section is provided in a part of an optical source 44 and a paper guide 38 for the center of a compensation device which drills a hole in a part right above a line sensor 43, even paper on which perforated stich machining is applied does not flat and a reference end of paper can be detected correctly. When a paper compensation control means changes pull-out force of a spring member due to paper position compensation value to be input, a difference in force to be transmitted to an arm pulley 55 occurs between a paper reference side and a paper inversion reference side. A difference in the direction of paper width occurs in force of a compensation device follow-up roller 46 which applies the action of a cantilever through an arm support point 58 on a compensation device driving roller 45 across image recording paper 1.

9. 发明专利

JP2002182515A IMAGE RECORDER 失效
公开(公告)号：JP2002182515A
公开(公告)日：2002-06-26
申请号：JP2000384886
申请日：2000-12-13
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OBATA SHIGERU , SATO KAZUYASU , KINOSHITA YASUSHI , KUWABARA AKITOMO , OBA TETSUYA
IPC分类号： G03G21/14 , B65H23/188 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide an image recorder which can well transport a continuous body to be recorded such as a plastics film with a shape of paper or sheet. SOLUTION: The image recorder which records a two-color image on both sides of a continuous body to be recorded 1 has transport rollers 71 and 72 which transport the body to be recorded 1, discharge rollers 73 and 74, a regulating means 8 which controls the position of the body to be recorded 1 in a width direction, a tension control part 2 which applies tension to the body to be recorded 1, a toner carrier, image recording means 3a, 3b, 3c, and 3d which transfer a toner image formed on a toner carrier surface to the body to be recorded 1, and a fixing means 5 which fixes the toner image transferred on the body to be recorded 1. In such an image recorder, the transportation torque of the discharge rollers 73 and 74 which apply tension to the body to be recorded 1 provided at the downstream side of the fixing means 5 is set larger than the transportation torque of heating rollers 53 and 54 of the fixing means 5 to transport the body to be recorded 1.

10. 发明专利

JP2002012350A IMAGE RECORDING DEVICE 失效
公开(公告)号：JP2002012350A
公开(公告)日：2002-01-15
申请号：JP2000200059
申请日：2000-06-28
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： OBATA SHIGERU , SATO KAZUYASU , KINOSHITA YASUSHI , ASHIBA KENJI , YOKOGAWA HIDEHO , NAKAJIMA ISAO , KUWABARA AKITOMO , ISHIZAWA KATSUMI
IPC分类号： B65H23/16 , B65H23/18
摘要： PROBLEM TO BE SOLVED: To provide an image recording device capable of well carrying a continuous recording object such as paper or a sheeted plastic film. SOLUTION: The image recording device for recording two-color images on both sides of the continuous recording object 1 comprises carrying rollers 71, 72, 73, 74 for carrying the recording object 1, restricting means 8 for restricting the crosswise position of the recording object 1, a tension control part 2 for giving tension to the recording object 1, image recording means 3a, 3b, 3c, 3d having a toner carrier for transferring an toner image formed on the surface of the toner carrier to the recording object 1, and fixing means 5 for fixing the toner image transferred to the recording object 1. Tension control is carried out by the tension control part 2 having a dancer roller 20 supported on a movable arm 21, wherein a load imposing point and a point of detecting the displacement of the dancer roller 20 are set at the outside of a dancer roller supporting point with respect to a supporting point of the arm 21.

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