专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2002108067A ELECTRIFYING DEVICE, AND IMAGE CARRIER UNIT AND IMAGE FORMING DEVICE EQUIPPED WITH THE ELECTRIFYING DEVICE 失效
公开(公告)号：JP2002108067A
公开(公告)日：2002-04-10
申请号：JP2000296637
申请日：2000-09-28
申请人： RICOH KK
发明人： KADONAGA MASAFUMI , TOKUMASU TAKAHIKO , SUGIURA KENJI , HASEBE MITSUO , TAKAHASHI TOMOKO
IPC分类号： G03G15/02 , F16C13/00
摘要： PROBLEM TO BE SOLVED: To uniformize the potential on the charged surface of a photoreceptor up to the level without causing an abnormal image. SOLUTION: When the minimum potential, by absolute value, of the charged surface of the photoreceptor 1 charged by an electrifying roller 5 is Vmin, the voltage applied to a potential leveling member 3 is Vpn and the electrification start voltage to start electrification in the case of electrifying the photoreceptor 1 in the state that the member 3 is brought into contact with the photoreceptor 1 which is not charged is Vth, they satisfy relation |Vmin-Vpn|>Vth. Thus, the potential is surely leveled by discharge on all the spots of the charged surface, so that irregular electrification is uniformly leveled up to the level without causing the abnormal image.

2. 发明专利

JP2001171213A PRINTER AND PRINTED MATTER 失效
公开(公告)号：JP2001171213A
公开(公告)日：2001-06-26
申请号：JP35999299
申请日：1999-12-17
申请人： RICOH KK
发明人： HASEBE MITSUO
IPC分类号： B41J2/01 , B41J29/00 , B41J29/40
摘要： PROBLEM TO BE SOLVED: To prevent a secrete document effectively from being copied and to accelerate reuse of a recording sheet by applying that anti-copy technology. SOLUTION: On the print set screen of a printer, a user can designate whether an ink or toner causing thermal variation in the color of a print image is used in the printing or not along with presence of print and the type of print of extra information in a print document. Any one of alarm indication that the image quality of a document is varied when the document is copied or an indication for accelerating reuse of a recording medium by erasing the print image using an erasable ink can be selected as the extra information and a material of variable color is used when these indications are printed. When the document is copied actually, color of the image is varied by the heat of a copy machine to notify a manager that the document is copied. When a thermally discoloring ink is used, the recording medium can be reused after the print image is erased.

3. 发明专利

JP2000351264A IMAGE RECORDING METHOD AND DEVICE 失效
公开(公告)号：JP2000351264A
公开(公告)日：2000-12-19
申请号：JP16448099
申请日：1999-06-10
申请人： RICOH KK
发明人： TAKAHASHI TOMOKO , HASEBE MITSUO
IPC分类号： B41J2/01 , B41J2/475 , B41M5/00
摘要： PROBLEM TO BE SOLVED: To reduce a material consumption by making a remaining unused material reusable to the maximum possible extent after transfer and limit a period when the unused material resides on an intermediate transfer member and maintain the recording quality of an image at an appropriate level even when a qualitative change in the material due to environments occurs, and further, make the material of a specified part removable from the surface of the intermediate transfer member. SOLUTION: This image recording method comprises a step to previously form a material 11 which can be dissolved in or swaller with a liquid and increases the viscosity of the liquid, a step to spew out the liquid to the surface of the intermediate transfer member 21 in compliance with an image signal and thereby form an image on the intermediate transfer member 21, a step to transfer an image to a recording paper 42, and a step to remove the remaining material 11 from the surface of the intermediate transfer member 21 after the transfer step. In this case, a step is provided which selectively executes the removal of the material 11 remaining on the intermediate transfer member 21 based on specified instructions.

4. 发明专利

JP2000158795A METHOD AND APPARATUS FOR RECORDING 失效
公开(公告)号：JP2000158795A
公开(公告)日：2000-06-13
申请号：JP33674198
申请日：1998-11-27
申请人： RICOH KK
发明人： HASEBE MITSUO , KAWAKUBO TOSHIO , TOMITA SATORU , TAKAHASHI TOMOKO , YANAGAWA NOBUYUKI
IPC分类号： B44C1/175 , B41J2/01 , B41M5/00 , B41M5/50 , B41M5/52
摘要： PROBLEM TO BE SOLVED: To provide a method for recording capable of simplifying an apparatus by reducing a using amount of a thickening powder in the method for recording to transfer by thickening ink jet liquid droplets by using an intermediate transfer. SOLUTION: A layer of a setting agent 4 is formed on a surface of an intermediate transfer 7 formed with a sticky layer 7a by a setting agent coating device. When ink liquid droplets are injected onto the transfer 7 to image an image, a part of the droplet 12 absorbs water to be swelled so that its viscosity is increased with the result that a stickiness is present. When a transfer sheet is superposed on the transfer 7, only the part of the droplets 12 in which the viscosity is increased is transferred to the transfer sheet so that only an unused agent 4 of a non-image part is retained on the transfer 7. The transfer 7 in which the agent 4 is retained lacked as it is by the transfer of the image, is again coated with the agent 4 by a coating roller 3. Thus, the agent 4 is adhered only to the part exposed on the surface of the transfer 7.

5. 发明专利

JPH02105173A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH02105173A
公开(公告)日：1990-04-17
申请号：JP25723588
申请日：1988-10-14
申请人： RICOH KK
发明人： HASEBE MITSUO
IPC分类号： G03G15/01 , G03G15/16 , H04N1/04 , H04N1/12 , H04N1/29 , H04N1/46 , H04N1/48
摘要： PURPOSE:To judge the presence or absence of deviation by performing measurement by a sensor which can detect the positions of pattern images for measurement formed on a transfer belt every recording device in the same time. CONSTITUTION:The transfer belt 21 is supported by a belt driving roller 24 and a follower roller 25 and moves in an A direction to convey transfer paper. A CCD sensor 27 having an image-formation optical system is provided as a pattern image detecting means on a downstream side in a belt moving direction with respect to a photosensitive body 14. The pattern images developed out of the area of the transfer paper by the respective recording devices with a signal from a pattern image signal generating means are respectively transferred to the transfer belt 21. The pattern images 28Bk, 28C, 28M and 28Y successively pass the sensor 27 with the movement of the belt and are detected by the sensor 27. Thus, the positional deviation quantity of each pattern can be obtained by one sensor and the accurate detection of the positional deviation with a few spatial and temporal errors can be performed.

6. 发明专利

JPH0216580A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0216580A
公开(公告)日：1990-01-19
申请号：JP16603488
申请日：1988-07-05
申请人： RICOH KK
发明人： NAGAHARA YASUMORI , ASADA KENICHIRO , FUJIOKA NAONOBU , KAMIMOTO YOSHIAKI , HASEBE MITSUO , NAGASAWA KIYOTO , KATSUMATA AKIO , SOGA SETSUO
IPC分类号： G03B21/132 , G03G15/00 , G03G15/01 , G03G15/04 , G03G15/043 , G03G15/20 , H04N1/053 , H04N1/113 , H04N1/12 , H04N1/23 , H04N1/29
摘要： PURPOSE:To shorten the length of the device main body of a copying machine which has plural photosensitive bodies by providing a speed switching means which scans an original image at a constant speed and moves an image carrier and a transfer material at the constant speed. CONSTITUTION:This image forming device is equipped with an image reading means 9 which scans the original image at the constant speed and reads it by color separation, an image processing means 10 which processes the read image signal into pieces of recording information by color components, an exposure means 12 which projects dot-decomposed light on the image carrier 14 moving at the constant speed according to the recording information processed by the image processing means 10, and a developing means 16 which develops an electrostatic latent image formed by exposure. Further, the device is equipped with a transfer means 17 which transfers the developed visual image to a transfer material moving at the constant speed, a fixing means 22 which fixes the image transferred onto the transfer material, and a speed switching means which scans the original image at the constant speed and moves the image carrier 14 and transfer material at the constant speed. Consequently, the speed for the image formation is switched accompanying the switching of the fixing speed, so the length of the device main body can be shortened, specially, as to the copying machine which has photosensitive bodies.

7. 发明专利

JPH01231069A IMAGE CONTROL METHOD FOR IMAGE FORMING DEVICE 失效
公开(公告)号：JPH01231069A
公开(公告)日：1989-09-14
申请号：JP5804688
申请日：1988-03-11
申请人： RICOH KK
发明人： KATSUMATA AKIO , HASEBE MITSUO , MITEKURA AYAHIRO , TAKAMI NOBUO
IPC分类号： B41J2/44 , B41J3/00 , G03G15/00 , G03G15/02 , G03G15/08
摘要： PURPOSE:To precisely perform a reference pattern detecting mode while removing the influence of the potential fluctuation of a photosensitive body so as to stably control an image forming condition by correcting the electrostatically charging condition of the photosensitive body so that the charging potential on the surface of the body detected in a charging potential detecting mode can obtain aimed charging potential. CONSTITUTION:The developing capacity characteristic of a photosensitive body is detected from the adhering quantity of toner by performing a pattern detecting operation after the body is electrostatically charged while the body is moved at a low speed so that the surface of the body can be electrostatically charged to prescribed potential. By detecting the developing capacity characteristic and the current charging potential of the photosensitive body obtained from a normal pattern detecting operation, the detected charging potential of the photosensitive body is controlled so that the detected charging potential can become aimed charging potential. Therefore, the pattern detecting mode can be executed precisely while the influence of the potential fluctuation of the photosensitive body is removed with a simple constitution and the image forming condition can be controlled stably.

8. 发明专利

JPS63146564A PICTURE READING METHOD 失效
公开(公告)号：JPS63146564A
公开(公告)日：1988-06-18
申请号：JP29387886
申请日：1986-12-09
申请人： RICOH KK
发明人： HASEBE MITSUO
IPC分类号： H04N1/04 , H04N1/19
摘要： PURPOSE:To obtain sharp color reproducibility by using a pulse lighting type light source for lighting an original, selecting the frequency of the lighting pulse as the same as the subscanning frequency and selecting the data read frequency of a line sensor as the subscanning frequency or above. CONSTITUTION:The light source of pulse emission (e.g., a discharge tube such as a fluorescent lamp or a xenon lamp) is employed as a light source lighting an original and the frequency of light emission and the frequency of one line reading by a CCD are selected to be the same to each other. Thus, the moving distance of the sensor is decreased while the lamp is emitted and the mixture of adjacent picture elements in the subscanning direction is decreased and the MTF in the subscanning direction is improved. Moreover, the lighting pulse frequency of the light source is synchronized with the subscanning frequency so as to apply readout in a short cycle in matching with the lighting time, not the readout from the CCD in one cycle within the moving time of one line in the subscanning direction. Thus, a sharp color reproducibility is obtained.

9. 发明专利

JPS6373276A LASER PRINTER 失效
公开(公告)号：JPS6373276A
公开(公告)日：1988-04-02
申请号：JP21720186
申请日：1986-09-17
申请人： RICOH KK
发明人： YONENAGA KOTARO , HASEBE MITSUO
IPC分类号： G03G15/01
摘要： PURPOSE:To prevent the deviation of dots of each color by adjusting a length between drums so that this length is integer times as long as the write width of one line in the subscanning direction of a laser beam. CONSTITUTION:Carrying length adjusting rolls 19a-19c provided in a transfer belt 16 are moved upward or downward to adjust lengths between drums 1a and 1b, drums 1b and 1c, and drums 1c and 1d. That is, the roll 19a is moved upward if an image 21b on the drum 1b leads an image 21a on the drum 1a, thereby minimizing the deviation of dots. A cam 20a is graduated, and the cam 20a is rotated based on the graduation in accordance with the extent of deviation of dots. If dots are not deviated, the carrying length between drums in integer times as long as one line in a subscanning direction (front ends of images of respective colors coincide with one another).

10. 发明专利

JPS631158A INTERMEDIATE TONE EXPRESSING METHOD FOR DIGITAL COPYING MACHINE 失效
公开(公告)号：JPS631158A
公开(公告)日：1988-01-06
申请号：JP14343686
申请日：1986-06-19
申请人： RICOH KK
发明人： HASEBE MITSUO
IPC分类号： H04N1/405 , B41J2/44 , G03G15/04 , H04N1/40
摘要： PURPOSE:To improve the quality of intermediate tone with low cost by coding information of plural adjacent dots and sending the result. CONSTITUTION:The size of matrix is decreased as 4 X 4 while keeping the data quantity of 1 bit/dot, each bit at each dot is not handled singly and bits of consecutive dots are handled relatingly. A consecutive 4-bit processing circuit 6 is provided, 16-level of 0-15 of the consecutive 4-bit are coded and the lighting time of a laser is controlled according to the code. Thus, the lighting time of 16-level is set within a time writing 4-dit, the consecutive 4-dot offers 15-valued expressions and in repeating the processing 4 times, set of dots of 15X4=60 gradations is formed. That is, the expression of 60 gradation is attained.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式