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公开(公告)号：JPH07152661A
公开(公告)日：1995-06-16
申请号：JP30202493
申请日：1993-12-01
Applicant: CANON KK
Inventor： MATSUO TAKUYUKI , NUMATA YASUHIRO , OTANI TAKESHI
Abstract: PURPOSE:To perform an optimum data transfer process even if process resources change by calculating the resource throughput of a host computer and a data recording device and determining plural data process items at the time of the transfer. CONSTITUTION:A disk device 13 stores plural test data for calculating the resource throughput of the host computer 1 and data recorder 2 and a central arithmetic circuit 15 performs a data process on the basis of one of test data read out of the disk device and calculates 1st process result data. The test data is transferred to the data recorder 2 through a two-way communication channel and a central arithmetic circuit 22 calculates 2nd process result data on the basis of the data and an interface part 21 transfers the data to the host computer 1. The central arithmetic circuit 15 determines plural data process items at the time of the transfer from the host computer 1 to the data recorder 2 according to the 1st and 2nd process result data.
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公开(公告)号：JPH04250058A
公开(公告)日：1992-09-04
申请号：JP440291
申请日：1991-01-18
Applicant: CANON KK
Inventor： TAKAHASHI KIICHIRO , TAJIKA HIROSHI , KOITABASHI NORIFUMI , SUGIMOTO HITOSHI , TANAKA SOHEI , NUMATA YASUHIRO
Abstract: PURPOSE:To provide an ink jet recording device which enables execution of excellent recording even when any abnormality occurring to data of a head is detected or information of a head is not read. CONSTITUTION:When heat characteristic information read from a recording head is abnormal, the condition, e.g. a preheat pulse width, a suction pressure, and a wiping frequency, of recording control is set to a standard value despite of the read head characteristic information. Since an abnormal state of the head characteristic information is detected and the control condition of the head is set on the recording device body side to a standard value, a time in which a device is brought into an unusable state is reduced, a discharge state of a necessary lowermost limit can be ensured when the head characteristic information is abnormal, and an approximately excellent picture can be provided through prevention of lowering of concentration and the occurrence of unevenness in concentration owing to unevenness in a discharge amount.
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公开(公告)号：JPH04235044A
公开(公告)日：1992-08-24
申请号：JP224891
申请日：1991-01-11
Applicant: CANON KK
Inventor： NUMATA YASUHIRO
Abstract: PURPOSE:To prevent the generation of printing shift even when a time sharing order is altered in a recording apparatus wherein the recording element of a recording head is divided into two or more recording elements to perform the time sharing driving of the divided ones in a predetermined order. CONSTITUTION:When time sharing driving is started from the digits (blocks) of the lower half like a contraction recording mode (steps S1, S2), the timing of time sharing driving is set (step 4) so as to be delayed by (a) as compared with usual one to prevent printing shift.
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公开(公告)号：JPH04133763A
公开(公告)日：1992-05-07
申请号：JP25504790
申请日：1990-09-27
Applicant: CANON KK
Inventor： NUMATA YASUHIRO
Abstract: PURPOSE:To record a high-quality image on the surface of a recording medium extensively by a method wherein recording on a recording medium which is released from a downstream recording medium feed means and fed only by an upstream recording medium feed means is controlled per minimum recording unit of a recording means. CONSTITUTION:A feed roller pair 10a, 10b is rotated by a drive force transmitted from a sub-scanning motor 9. On the downstream side of the feed roller pair 10a, 10b, a discharge roller pair 11a, 11b for discharging a recorded medium 2 is provided across a recording means. Even if a distance from the paper discharge rollers 11a, 11b to the trailing end of the recording paper 2 is less than a line pitch when the recording paper 2 is released from the paper feed rollers 10a, 10b and clamped and fed only by the paper discharge rollers 11a, 11b, a last line which can be recorded on the recording paper 2 is recorded without misregistration by changing the pulse number of the sub-scanning motor 9 and controlling a nozzle of an ink jet recording head 1a.
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公开(公告)号：JP2002127446A
公开(公告)日：2002-05-08
申请号：JP2000324532
申请日：2000-10-24
Applicant: CANON KK
Inventor： NUMATA YASUHIRO
IPC: B41J2/175
Abstract: PROBLEM TO BE SOLVED: To provide a printer wherein a complex operation such a timing of ejection of ink which is controlled by a software controlling is eliminated and the reliability of a software can be enhanced. SOLUTION: When a flag 15b attached to a carriage 15 moves across a photosensor 21, a photosensor 8 for detecting non-ejection is turned on. When the flag 15b passes through the sensor 21, the sensor is released from the light- blocking condition and then the sensor 21 turns off and the ejection of ink for detection non-ejection is started. At that time, the photosensor 8 is warmed and the stable detection is started.
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Patent Agency Ranking
公开(公告)号：JP2000185448A
公开(公告)日：2000-07-04
申请号：JP36499998
申请日：1998-12-22
Applicant: CANON KK
Inventor： NUMATA YASUHIRO
Abstract: PROBLEM TO BE SOLVED: To make the cleaning period of time shorter by detecting smudges of a conveyer means and obtaining positions and the number of smudges, and permitting the conveyer means to be moved in order, and also permitting the conveyer means to be cleaned from a maintenance opening. SOLUTION: A scanner 31S operates to ascertain whether smudges exist on a conveyer belt or not by making a conveyer belt travel around, and read data is temporarily stored in a memory. Next, a check is made as to whether smudges exist on the read data or not, and if it is determined as having smudges, a position to be cleaned on the conveyer belt is checked form the smudge data. Subsequently, the number of conveyer belt smudges is checked from the smudge data. When movement is designated by a servicing operation switch, the conveyer belt is rotation moved to shift to the cleaning position. As a result, smudges on the conveyer belt are moved to a servicing opening A, so that a service man or a user starts cleaning conveyer belt smudges from the servicing opening.
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公开(公告)号：JPH11192692A
公开(公告)日：1999-07-21
申请号：JP36911497
申请日：1997-12-29
Applicant: CANON KK
Inventor： NUMATA YASUHIRO
Abstract: PROBLEM TO BE SOLVED: To clean only new stain. SOLUTION: Stain on a conveying belt 31 is detected by a sensor 131 for detecting stain and a stain level detected on each detection point is stored in a RAM 803 by making each stain level detected on each detection point correspond to a detection point discrimination number. It is judged whether on not the stain level at the detection time stored in the RAM 803 has a difference with respect to stain level data after the completion of cleaning which is stored in the RAM 803 by each patron block. When there is not any difference between both data with respect to all of the blocks, the cleaning is not executed. When there is the difference in any one of blokes, a cleaning roller 38 is brought into contact with the conveying belt 31 by driving a cleaning solenoid 138, then the cleaning is executed. When the cleaning of the conveying belt 31 is completed, the stain of the conveying belt 31 is detected as the periodic detection and the arithmetic mean of the stain levels is obtained. The obtained arithmetic mean is stored in the RAM 803 by corresponding it to the block.
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公开(公告)号：JPH11129454A
公开(公告)日：1999-05-18
申请号：JP29592597
申请日：1997-10-28
Applicant: CANON KK
Inventor： NUMATA YASUHIRO
Abstract: PROBLEM TO BE SOLVED: To permit the confirmation of operation of various head-type recording heads, capable of being connected to a recording device. SOLUTION: The head type of a recording head is confirmed whether is it A or B based on the logical level of a discriminating signal included in a flexible cable connecting the recording head to the main body (control unit) (S401). The existence of abnormality in discharging ink is confirmed in processes after S402 in accordance with the head type.
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公开(公告)号：JPH08183173A
公开(公告)日：1996-07-16
申请号：JP32873694
申请日：1994-12-28
Applicant: CANON KK
Inventor： NUMATA YASUHIRO
Abstract: PURPOSE: To avoid an erroneous operation by varying the content of operation automatically based on an information of either a recording head or a reading sensor mounted in a recording device with a carriage mounting selectively the recording head or the reading sensor. CONSTITUTION: A device is provided with a black ink carriage 12 connectable with a scanner 78 and a color ink carriage 38, and either of a black ink cartridge 13 or a scanner unit can be mounted selectively on the carriage 12. Either of a color ink cartridge 44 or a scanner unit can be mounted selectively on the carriage 38, and when scanner units are mounted on the carriages 12 and 38, the carriages 12 and 38 are retained on the positions deviated from the working positions of caps of cartridges 13 and 44 in the waiting state.
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公开(公告)号：JPH08174909A
公开(公告)日：1996-07-09
申请号：JP32003294
申请日：1994-12-22
Applicant: CANON KK
Inventor： NUMATA YASUHIRO , OTANI TAKESHI
Abstract: PURPOSE: To easily change a print mode by detecting a count of printing dots per one scanning, and controlling a printing means to change a thinning rate for data to be printed based on the detection result. CONSTITUTION: A printer apparatus is provided with a printing head 2, a carriage motor 11, a paper feed motor 12, etc., operating with an HQ mode giving priority to the image quality and an HS mode giving priority to the printing speed. In the printer apparatus, a flag as an investigation result of a printing duty is checked in the HQ mode by a CPU 201. If the flag shows a smaller value than a threshold value, normal printing is decided. On the other hand, if the printing duty exceeds the threshold value, printing is conducted twice with by use of printing data thinned, for example, by 50%. Similarly, the printing duty is checked in the HS mode. If the printing duty is smaller than the threshold value, printing data thinned by 50% are recorded by one path printing. If the printing duty is larger than the threshold value, the level of the duty is checked and printing is conducted by the use of printing data thinned by 75%, 80% at levels 1, 2, respectively.
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