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1. 发明专利

JPH11192721A PRESSURE DAMPER FOR INK JET PRINTER AND INK JET PRINTER 失效
公开(公告)号：JPH11192721A
公开(公告)日：1999-07-21
申请号：JP30444898
申请日：1998-10-26
申请人： FUJITSU LTD
发明人： TAKADA NOBORU , NONOYAMA SHIGEO , OZAKI MITSUO , NAKAZAWA AKIRA
IPC分类号： B41J2/175
摘要： PROBLEM TO BE SOLVED: To simplify a structure, to reduce a size and to improve reliability in terms of a pressure damper for an ink jet printer and the ink jet printer. SOLUTION: There is disclosed a pressure damper 31 which is provided between an ink jet head 2 and an ink supplying source 3 and comprises a pressure absorbing section 32 for absorbing pressure variation of ink flowing into the ink jet head 2. A filter 33 for removing a foreign material entering into the ink is provided in a position away from flexible walls 37, 38 that form the pressure absorbing section 32 of the pressure damper 31 and absorb the pressure variation of the ink.

2. 发明专利

JPH10167543A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH10167543A
公开(公告)日：1998-06-23
申请号：JP33231896
申请日：1996-12-12
申请人： FUJITSU LTD
发明人： MATSUMOTO YOSHIYA , NONOYAMA SHIGEO , TAKEI TETSUYA , KERA HIROSHI , TAKAHASHI TAKESHI , YAMAGUCHI YOSHIO , NAGAHARA AKIRA , KUWABARA NOBUO
IPC分类号： B41J13/00 , B65H29/58 , B65H29/60 , G03G15/00 , G03G15/23
摘要： PROBLEM TO BE SOLVED: To provide an image forming device which allows two-side printing and enables printing even on a sheet of paper having a high rigidity such as postcard, OHP sheet, envelope, etc. SOLUTION: A two-side printer 20 is equipped with a photo-sensitive drum 33, face-down stacker 42, sheet exhaust path 41 for face-down stacker, sheet switch-back part 51 and a sheet passage 56 for the sheet switch-back part, and further the arrangement includes a face-up stacker 50, a straight exhaust sheet passage 57 for the face-up stacker, and a sheet distributing mechanism 65 which feeds the sheets from a feed roller 36 in distribution to either of the passages 41, 56, and 57. Sheets having a high rigidity are passed through the passage 57 and exhausted into the face-up stacker 50.

3. 发明专利

JPH09136730A PAPER DELIVERY MECHANISM 失效
公开(公告)号：JPH09136730A
公开(公告)日：1997-05-27
申请号：JP29519795
申请日：1995-11-14
申请人： FUJITSU LTD
发明人： NONOYAMA SHIGEO
IPC分类号： G03G15/00 , B65H3/00 , B65H3/44 , B65H3/46
摘要： PROBLEM TO BE SOLVED: To detect a jam and the length of paper and cope with high speed feed without the cost increase of members in paper delivery mechanism for detecting a delivery failure and the size of paper and controlling the delivery interval of paper using a paper feeding sensor. SOLUTION: Paper delivery mechanism is provided with a paper stacking part 2, a delivery means 3 for delivering paper 1 from the paper stacking part 2, and a detecting means 7 for detecting the presence of paper 1 in the paper stacking part 2. The detecting means 7 is composed of a lever 9 oscillated by the presence of paper 1, and an optical sensor for detecting the presence of paper 1 through the shielding and shielding release of light at one end by the oscillation of the lever 9. The lever 9 is so constituted as to be positioned to detect the presence of the paper 1 before delivery and at the time of starting delivery action, to be positioned in a no-paper state after the delivery of the paper 1 and to be disposed again in a position of detecting the presence of the paper 1 after being once positioned in a paper existing state after the passage of the rear end of the paper 1.

4. 发明专利

JPH07223320A INK-JET PRINTER 失效
公开(公告)号：JPH07223320A
公开(公告)日：1995-08-22
申请号：JP1705394
申请日：1994-02-14
申请人： FUJITSU LTD
发明人： NONOYAMA SHIGEO , NAGASAKI YOSHIKI , SAKAMOTO CHIKAKO , KAWAMURA TAKUMI
IPC分类号： B41J2/165 , B41J2/18 , B41J2/185 , B41J23/02
摘要： PURPOSE:To enable constitution of an ink-jet printer so that it can possess a nozzle protective mechanism which is tiny and quick in response and the protective mechanism of the nozzle can be constituted of a few parts precisely at a low cost, in relation to the ink-jet printer which is made so as to perform recording by discharging an ink drop through the nozzle. CONSTITUTION:This ink-jet printer is constituted by providing one turn clutch 15 transmitting a turning motion of a main sheet feeding shaft 1 to a nozzle protective mechanism 10 by one turn to let a nozzle protective mechanism 10 perform fixed nozzle protective action when a carriage 4 comes to a home position.

5. 发明专利

JPH0776093A CLEANING CONTROL METHOD OF INK JET HEAD AND LINE INK JET PRINTER SUITABLE THEREFOR 失效
公开(公告)号：JPH0776093A
公开(公告)日：1995-03-20
申请号：JP22437593
申请日：1993-09-09
申请人： FUJITSU LTD
发明人： SAKAMOTO CHIKAKO , NONOYAMA SHIGEO , NAGASAKI YOSHIKI
IPC分类号： B41J2/165
摘要： PURPOSE:To enhance printing throughput in the cleaning control method of an ink jet head. CONSTITUTION:An ink jet printer is constituted so that printing is performed using at least one of a plurality of ink jet heads 1 while at least the other one of them is cleaned.

6. 发明专利

JPH06143605A INK CASSETTE-LOCKING MECHANISM 失效
公开(公告)号：JPH06143605A
公开(公告)日：1994-05-24
申请号：JP29476192
申请日：1992-11-04
申请人： FUJITSU LTD
发明人： NAGASAKI YOSHIKI , UEDA MASANORI , NONOYAMA SHIGEO , SAKAMOTO CHIKAKO , KAWAMOTO SHUJI
IPC分类号： B41J2/175 , B41J29/54
摘要： PURPOSE:To provide a locking mechanism of an ink cassette used in an ink jet printer which disables detachment of an ink cassette except for exchanging thereof. CONSTITUTION:An ink jet printer comprises an arm 24 of which action enables the detection of the empty of an ink cassette 20, thereby the ink cassette 20 is to be exchanged. An ink cassette mechanism 30 employs a rotatable lever 25 and a biasing means 26 for biasing the lever 25 in one direction provided to the ink cassette 20 and a stopper 27, provided on the printer, which disables detachment of the ink cassette 20 by a constitution wherein the lever 25 is rotated against the biasing force of the biasing means 26 when loading and is stopped with the stopper 27.

7. 发明专利

JPH05155010A DRIVE WAVEFORM SWITCHING OF INK JET PRINTER 失效
公开(公告)号：JPH05155010A
公开(公告)日：1993-06-22
申请号：JP32349191
申请日：1991-12-07
申请人： FUJITSU LTD
发明人： NONOYAMA SHIGEO , UEDA MASANORI , KAWAMOTO SHUJI , NAGASAKI YOSHIKI , KAWANA CHIKAKO
IPC分类号： B41J2/01 , B41J2/045 , B41J2/055 , B41J2/205
摘要： PURPOSE:To improve the print quality of routine printing process and draft printing process by driving an ink jet printer in a double pulse pattern when a routine printing mode is used, and in a signal pulse pattern when a draft printing mode is used, in a drive waveform switching process by which to switch the drive waveform of the ink jet printer. CONSTITUTION:The subject drive waveform switching process is designed so that a head 11 for applying a voltage to generate ink particles and a signal generation part 1 for generating signal which drives the head 11 are provided, and if a routine printing mode is used, the signal generation part 1 generates a drive signal to drive the head 11 and print data in almost circular dots. In addition, the process allows the head 11 to be driven by a generated single pulse drive signal in the draft printing mode so that data is printed in elliptical dots.

8. 发明专利

JPH04189144A APPARATUS FOR DRIVING INK JET HEAD 失效
公开(公告)号：JPH04189144A
公开(公告)日：1992-07-07
申请号：JP26548590
申请日：1990-10-03
申请人： FUJITSU LTD
发明人： TAKADA NOBORU , NONOYAMA SHIGEO , OZAKI MITSUO , TANIGUCHI OSAMU
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE:To perform the optimum recording corresponding to recording paper or temp, by adjusting the emitting amount of ink by changing the time from the second increase of internal volume to the second reduction thereof to control a recording state. CONSTITUTION:An electromechanical converter 11d is driven using the first and second driving pulses DP1, DP2 and the internal volume of an ink chamber 11c is increased and subsequently decreased and, after a predetermined time, the internal volume of the ink chamber 11c is again increased and decreased to inject an ink liquid droplet from a nozzle 11a. At this time, when recording density (ink jet amount) is desired to be changed, the time width (from the second increase of internal volume to the second decrease thereof) of the second driving pulse DP2 is adjusted by a time variable part 12b. When the time width of the second driving pulse DP2 is controlled, the diameter of the ink or the amount of the ink liquid droplet can be changed and recording density can be controlled. By this method, a recording state can be improved corresponding to paper quality or room temp.

9. 发明专利

JPH0478543A PURGING MECHANISM OF INK JET PRINTER 失效
公开(公告)号：JPH0478543A
公开(公告)日：1992-03-12
申请号：JP19072190
申请日：1990-07-20
申请人： FUJITSU LTD
发明人： NONOYAMA SHIGEO , TANIGUCHI OSAMU , OZAKI MITSUO , TAKADA NOBORU
IPC分类号： B41J2/18 , B41J2/175 , B41J2/185
摘要： PURPOSE:To enable an amount of ink to be discarded by purging operation to be reduced to the minimum by discharging certainly babbles and ink made more viscous in a nozzle by a method wherein opening of an air valve attached to a pressure chamber on a non-operation side of a pump cylinder is adjusted. CONSTITUTION:A head 2 is moved to a position opposed to a sucking opening 8 of a purging mechanism 4, and the sucking opening 8 is stuck fast to a nozzle 7. When a lever 12 is clockwise rotated, a piston 11 advances left. A volume of a pressure chamber 10a increases, and bubbles, viscous ink, etc. inside the nozzle pass through a check valve 13 and enter the pressure chamber 10a. Thereafter, when motion of the lever 12 is stopped and the piston 11 is supported, pressure in the pressure chamber 10a is little by little increased by an inflow of ink from the sucking opening 8 and retreat of the piston 11. However, when this speed is too high, bubbles and ink made more viscous can be not sufficiently removed from the nozzle 7 and good purging operation is not performed. An air valve 15 capable of adjusting its opening is attached to a non operation side pressure chamber 10b, and a damping function of an air damper is freely adjusted according to opening of the air valve 15.

10. 发明专利

JPH03216346A INK SUPPLY STYLUS 失效
公开(公告)号：JPH03216346A
公开(公告)日：1991-09-24
申请号：JP1065390
申请日：1990-01-22
申请人： FUJITSU LTD
发明人： OZAKI MITSUO , TANIGUCHI OSAMU , NONOYAMA SHIGEO , NAKAZAWA AKIRA , TAKADA NOBORU
IPC分类号： B41J2/17 , B41J2/175 , B67D99/00
摘要： PURPOSE:To prevent the invasion of shavings of rubber, dust, air, and the like into an ink supply system and the leakage of ink from the ink supply system by sealing a hole with a second hollow stylus during a period of time other than the completion of ink cartridge insertion. CONSTITUTION:When an ink cartridge is not inserted, a second hollow stylus 12 is positioned by a hole opening/closing means 13 so as to seal a hole 15 of a first hollow stylus 11. When the ink cartridge is removed, the ink cartridge 2 is pulled off rightward. This movement of the ink cartridge 2 is detected by a sensor. The hole opening/closing means 13 is actuated on a signal from the sensor to return the second hollow stylus 12 to the former position to seal the hole 15. Namely, the second hollow stylus 12 seals the hole 15 when the ink cartridge is not inserted ; it releases the hole 15 to allow ink to be supplied to a recording head only when the ink cartridge is completely inserted.

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