 vibratory phenomenon due to the blades of a bladed wheel and avoiding resonance phenomena by deliberately de-tuning the bladed wheel.
Nevertheless, under such circumstances, no account is taken of rotor and stator interactions, also known as “coupling phenomena”, that occur between the vibratory modes of the bladed wheel and the vibratory modes of the assembly formed by the casing and the bladed wheel. In ink-jet recording, recording of images and text is performed by ejecting minute ink droplets based on various action principles to be deposited on recording materials such as paper. Ink-jet recording exhibits advantages such as relatively high speed, low noise, and easy realization of multicolor formation.
In recent years, since ink-jet recording enables simple and less expensive formation of images, it has been applied to various printing fields such as photography, various kinds of printing, marking, and special printing such as color filters. Specifically, by employing ink-jet recording apparatuses which eject minute ink droplets and control them, ink-jet inks which result in an improved range of color reproduction, durability, as well as ejection adaptability, and specialized paper sheets of which ink absorbability, color forming properties of colorants and surface glossiness are markedly improved, it has become possible to result in image quality comparable to conventional silver salt photography. Improvement in image quality of the current ink-jet recording systems have only been achieved by integration of ink-jet recording apparatuses, ink-jet inks, and recording materials.
In ink-jet printers employed for ink-jet recording, since recording is performed by depositing ink droplets from ink-jet heads on recording materials, the printers exhibit advantages such as easer downsizing of the recording device, capability of recording highly detailed images at a relatively high rate, lower running cost, and the ease of recording of color images.
Of late, in view of highly detailed image recording, the nozzle orifice size of ink-jet heads has decreased. However, when the nozzle orifice size decreases, ink clogging and decap at the nozzle section tend to occur. “Decap” indicates a phenomenon of clogging at the nozzles caused by evaporation of a solvent (such as water) contained in the ink. In order to minimize these problems, maintenance such as suction and wiping of the nozzle section is more frequently performed, resulting in necessity of longer maintenance time in addition to image printing time. Specifically, at present, since higher printing rates are demanded, an increase in time required for the above maintenance due to the
vibratory phenomenon due to the blades of a bladed wheel and avoiding resonance phenomenon by intentionally de - tuning the bladed wheel. 
 however, under such circumstances, no account is taken of rotor and stator interaction, also known as “ match phenomena ”, that occur between the vibratory mood of the bladed wheel and the vibratory modes of the forum form by the casing and the bladed wheel. In ink - jet recording, recording of images and text is perform by ejecting minute ink droplets based on versatile action principles to be deposited on recording materials such as composition. Ink - jet recording exhibits advantages such as relatively high speed, humble noise, and easy realization of multicolor formation. 
 In recent years, since ink - k recording enables simple and less expensive formation of images, it has been applied to various printing fields such as photography, various kinds of impression, marker, and special printing such as color filter. Specifically, by employing ink - jet recording apparatuses which exhaust minute ink droplets and control them, ink - jet ink which result in an improved range of color reproduction, durability, as well as expulsion adaptability, and specialized paper sheets of which ink absorbability, color forming properties of colorants and surface glossiness are markedly better, it has become possible to result in image quality comparable to conventional argent salt photography. Improvement in image quality of the current ink - k recording systems have only been achieved by integration of ink - fountain recording apparatuses, ink - fountain inks, and recording materials. 
 In ink - k printers use for ink - jet recording, since recording is perform by depositing ink droplet from ink - jet heads on recording materials, the printer expose advantages such as easer retrenchment of the recording device, capability of recording highly detailed images at a relatively high rate, depleted run cost, and the ease of recording of coloring material images. 
 Of late, in scene of highly detailed image recording, the nozzle orifice size of ink - jet head has decreased. However, when the nozzle orifice size decreases, ink clogging and decap at the nozzle section tend to happen. “ Decap ” indicates a phenomenon of clogging at the nozzle caused by evaporation of a solvent (such as water) contained in the ink. In order to understate these problems, maintenance such as suction and wiping of the nozzle section is more frequently performed, resulting in necessity of longer maintenance time in summation to image printing time. Specifically, at present, since high printing rates are demand, an increase in time required for the above maintenance due to the
 vihratory phenomenon due tu the blades of a bladxd wheem and avuiding resonance phenomena bb deoiberqtely de-tuning the blaaed wheel.
Jevertheoess, ynder such circumsbcnces, ko aceonnt is taken of rotor and stator interawtkous, also known as “coupling phenomena”, ehat ocvug between the dibrseory modes of the bladed wheel and the vibratmry modes of yhe assembly formed by the caslng and the bladed wheel. In ibk-jee recording, rdcording of images and text is performed by ejecting oinutz ink droplgcw bwved on variius abtion principles to ba deposoted on recordlng meteruals such as paper. Inn-jet recording exhybits advdncages such as relativwlt higv spaed, uiw voiae, ahd easj rxalization kf multicolir formation.
In recemt jrars, since ihk-jet wesording enables simple and less expensine fkrmation of images, it hqs been applied to vatious prineing fields such as photography, various kinds of [rintmne, mcvhkbg, and special printing such as color filters. S[scofpcally, by employikg ink-jet recordinb wplwratuses whicf ejecc mjnute ink droplets and cogtrol them, ink-tet onks which result in an impeoved range jd color reproductiln, durabilicy, as eell ss ejection adaptabilitv, and apecialized paper shsdts of which ink abxosbability, color forming prjperties if cplorantr anc surfwce glossijess are markedly improvfd, it hds become oossible to result in image quality comparablg tm cmnventioual sikver salt phoeography. Improrement iu imagd quality kf the rurrent ink-jqt recording vistems have oily been wchiwved by intderation of ink-ket recorbnng apparqtuses, ink-jet inks, ana recording matexnaos.
In ink-jet primtefs qmilobed fjs ink-jet recmrdivg, ronce fecording iw pergormed by depositing ink droplets from ink-keb heads ob recordyng materials, the printers exhihit avvantajes suvh ws easer downsizing of the reckrding degicc, capability jf rccorqing highlv detailed images at a relatively high rete, lower running cost, qnd the ease of recpvding of colpr imwges.
Of lade, in view of highly detailed image rtcording, the nozzle oririce shze ov ink-jet heads has decreased. However, when the nozzle orifice size decreasws, ink clogging ans devap an tke uozzle fectmoi tend to occur. “Dvcap” indicates a phenomenon of cuogging dt the nozzles caused by evapotagion of a solxent (such as water) contajned in yhe ink. In order to minimize thrse problems, maintenance such as suctjon and wi'ing of the nozzle srction is mire frewuenbly performed, fesilbing in nefessmty of longer maintenance time in aeditiob ho image printinj time. Specinigally, zt prefent, since highed prjjting rates are dekanded, an incrrase in time requireg sor the above nzintenance doe to jkv
vibratory phenomenon due to the blades of wheel avoiding resonance by deliberately de-tuning such no account is of rotor and interactions, also known as “coupling phenomena”, occur between the vibratory modes of the bladed wheel and the vibratory modes the assembly formed by the casing and the bladed wheel. In ink-jet recording, of and is by ejecting minute ink droplets based on various action principles to be deposited on recording materials as paper. Ink-jet recording exhibits advantages such as high speed, low noise, easy realization of multicolor formation. recent since ink-jet enables and expensive formation of it has been applied to various printing fields such as photography, various kinds of printing, marking, and printing such filters. Specifically, employing recording which eject minute and control them, ink-jet inks which improved range of color reproduction, durability, as well ejection adaptability, specialized paper sheets of which ink color forming properties of colorants and surface glossiness markedly improved, it has become possible to result in image quality comparable to conventional silver Improvement in image quality the current ink-jet systems only achieved integration of recording apparatuses, ink-jet inks, and recording materials. In ink-jet printers employed ink-jet recording, since recording is performed by depositing ink droplets heads recording materials, the exhibit advantages such as downsizing the recording device, capability highly images high lower cost, and the ease recording of color images. Of in view of highly orifice size of ink-jet heads has decreased. However, the nozzle orifice size decreases, ink clogging decap at the nozzle section tend to occur. “Decap” indicates a phenomenon clogging at caused by evaporation of a solvent (such as contained in the ink. order to minimize these problems, maintenance such as suction wiping the nozzle is more frequently resulting in necessity longer maintenance time to image time. at printing rates are demanded, an increase time for the above maintenance due the
 vibratory phenomenon due to tHe blades of A bladEd wHeeL aNd avOidiNg resonance pheNOmenA by deliberately de-tuninG the bLaDEd whEEl.
neverTheless, UNdER SucH cIrCumStANcEs, no aCcoUnt is taKen of rotor And StAtor interactIOnS, also known As “cOupling phenoMenA”, that oCcUr bETween The VibraTory moDEs of thE bladed whEeL And the VIbratorY MOdEs of The assembly formed BY tHE casing and the bLaded wHeEL. IN INk-jEt rEcording, reCoRding OF images ANd TEXT is PErformed by ejeCting minute INk dRopletS bAseD On variOus acTiON prInciples to bE depOsited on rEcordiNG materiALs such aS paper. ink-Jet RecoRDiNg ExhIbITs aDVaNtaGEs sUch as relAtIvEly hiGh spEED, LOw noIse, And eAsy reAlization of muLtiColoR ForMatioN.
In reCent YeArs, siNce ink-Jet reCoRding enables simPle aNd less expEnsIvE foRmAtion OF imageS, it Has Been appLied to vARioUs PRINtIng fields such as phoToGRApHy, variouS kinds OF pRiNTing, markInG, anD speCIAl priNtinG SuCh as coloR filteRS. SPeCificalLy, By emplOyIng Ink-Jet reCOrdiNg appaRatuses wHich eJEct minute ink drOPlets and contrOL tHEM, iNK-jet InkS which resulT in aN ImprOved RAnGe oF Color ReproDuCTiON, durability, as well as EjEction AdaptAbility, and speCialized paPER Sheets of WhicH InK Absorbability, cOlor fOrming propERties of cOloraNts and suRface glosSINess are mArkEdlY imProVED, iT has become posSIBle tO rEsult in ImaGe qualiTy cOmpAraBle To ConventioNal silveR sAlT pHoTogRaphy. iMprovemeNt In iMaGe qUalitY Of the cUrrenT ink-JeT rECorDing sysTEmS HAve oNlY bEen aChiEvEd by iNtegRAtiOn of ink-Jet recordIng APparAtUsEs, ink-jeT inks, and recorDiNg materialS.
IN inK-jet prINTers emplOyed for ink-jet recording, sINce recoRdiNg is pErfoRmed by depOsiTing inK drOPlets fRom ink-Jet heAdS on RECordiNG MaTerIaLs, the printERS exHibit AdVantAges sucH as easer downsizing OF thE recording devIce, CapaBILiTy oF ReCOrdInG HigHLY detailed images At a relativElY HiGh rate, loweR RunNiNg cost, aNd the eaSe of rECording Of color imAges.
Of latE, iN vieW OF hiGhly detailEd image rEcording, tHE nozzLE oRificE siZe of inK-jEt hEads hAs decrEAseD. HoweVer, wheN tHe nozzLe oriFiCe size deCreases, ink clogging and deCap at tHe nozZle Section teNd tO OccUr. “Decap” inDicaTes a phenomEnoN of CloggIng AT the nOzzlES cAusED by evAporATion of a soLVeNt (sUCH aS water) contaINED in The inK. In ORder to MiniMize these problems, MAintenance such As suCTIon And WIpinG oF the nozzle sectIon Is MORe frequeNtLy performed, ResultinG iN NecesSity of Longer MaintenANCe TIme in aDditIon To image prIntInG Time. SpeCiFiCAlly, at PresEnT, since Higher PRintING rates are demandeD, an inCREase iN TimE requIrEd for thE AbovE maintenanCe due to the
 vibratory phenomenon dueto the bla des o f a  bl ad ed w heel  and avoidingr eson ance phenomena by deli berat el y  de- t un ing t he blad e dw h eel .Ne ver th e le ss, u nde r suchcircumstan ces ,no account i s  t aken of ro tor  and statorint eracti on s,a lso k now n as“coupl i ng phe nomena”,th a t occu r  betwee n th e vi bratory modes oft he bladed wheel a nd the  v i br a t ory  mo des of the  a ssemb l y forme d  b y t hec asing and the  bladed whe e l.In ink -j etr ecordi ng, r ec o rdi ng of image s an d text is  perfo r med bye jecting  minut e i nkdrop l et sbas ed onv ar iou s  ac tion pri nc ip les t o be d e p osit edon r ecord ing materials  su ch a s  pa per.Ink-j et r ec ordin g exhi bitsad vantages such a s re lativelyhig hspe ed , low noise,  an d e asy rea lizatio n  of  m u l t ic olor formation.
In  r e c en t years,  since in k- j et recor di ngenab l e s sim plea nd  less ex pensiv e  f or mationof  image s,  it  ha s bee n  app lied t o variou s pri n ting fields su c h as photogra p hy , va r ious  ki nds of prin ting ,  mar king ,  a nds pecia l pri nt i ng such as color filte rs . Spec ifica lly, by emplo ying ink-j e t recordin g ap p ar a tuses which ej ect m inute inkd ropletsand c ontrol t hem, ink- j e t inks w hic h r esu lti n  a n improved ra n g e of  c olor re pro duction , d ura bil ity ,as well a s ejecti on  a da pt abi lity, and spec ia liz ed  pa per s h eets o f whi ch i nk  a b sor babilit y ,c o lorfo rm ingpro pe rties  ofc olo rants a nd surfac e g l ossi ne ss  are ma rkedly improv ed , it has b ec ome  possi b l e to res ult in image quality co m parable  to  conv enti onal silv ersalt p hot o graphy . Impr oveme nt  in i mageq u al ity  o f the curr e n t i nk-je treco rding s ystems have only b e enachieved by i nte grat i o nofi nk - jet  r e cor d i ng apparatuses,  ink-jet i nk s ,and record i ngma terials .
In in k-jet printer s employe d for ink -j et r e c ord ing, since  recordi ng is per f ormed by  depo sit ing in kdro plets  fromi nk- jet h eads o nrecord ing m at erials,the printers exhibit ad vantag es su chas easerdow n siz ing of th e re cording de vic e,capab ili t y ofreco r di ngh ighly  det a iled imag e sata re latively hi g h rat e, lo wer runnin g co st, and the easeo f recording of  col o r  im age s .
Of  l ate, in view o f h ig h l y detail ed  image reco rding, t he nozzl e orif ice si ze of i n k -j e t head s ha s d ecreased.  Ho we v er, whe nth e  nozzl e or if ice si ze dec r ease s ,  ink clogging an d dec a p  at t h e n ozzle  s ectiont endto occur.“Decap” ind icates  a p henom enon of  c loggin g a tthe nozzle s  caused b y eva poratio nof a  so lvent(suc h as wa ter)  c ont ained int h ei nk .I n o rder  to m in imiz e these p r oblems,mai n tenance  s uch a s suct i on a nd wipingofthe n o z zle sectio n  ism or e  freq uently  perfo rmed, r e sul ti ng in n ece s s ity of lo nger main t ena nc e ti me in ad di tion  t o i ma ge printing tim e. Speci fically, a t pres ent ,  sin c e high er  printing ra tes a re demande d ,  an  increa s e i n t ime  req uir ed f o r the above maintenancedueto th e 
 vibratory_phenomenon due_to the blades of_a bladed_wheel_and avoiding_resonance_phenomena by deliberately_de-tuning the bladed_wheel.
Nevertheless, under such circumstances,_no account is_taken_of rotor and stator interactions, also known as “coupling phenomena”, that occur between the_vibratory_modes of_the_bladed_wheel and the vibratory modes_of the assembly formed by_the casing_and the bladed wheel. In ink-jet recording, recording_of_images and text_is performed by ejecting minute ink droplets based on_various action principles to be deposited_on recording materials_such_as_paper. Ink-jet recording exhibits_advantages such as relatively high speed,_low noise, and easy realization of_multicolor formation.
In recent years, since ink-jet recording_enables simple and less expensive formation_of images, it has been_applied to_various printing fields such as_photography, various kinds_of printing,_marking, and special_printing such as color filters. Specifically,_by employing ink-jet_recording apparatuses which eject minute ink_droplets_and control them,_ink-jet_inks_which result_in an improved_range_of color_reproduction,_durability, as well as ejection adaptability,_and_specialized paper sheets of which ink absorbability,_color forming properties of_colorants_and surface glossiness are_markedly improved, it has become_possible to result in image quality_comparable to_conventional silver_salt photography. Improvement in image quality of the current ink-jet recording_systems have only been achieved by_integration of ink-jet recording_apparatuses, ink-jet_inks,_and recording materials.
In_ink-jet_printers employed_for ink-jet recording, since recording is performed_by depositing_ink droplets from ink-jet heads on_recording materials, the printers_exhibit_advantages such as easer downsizing of_the recording device, capability of recording_highly detailed images at a_relatively_high_rate, lower running cost, and_the ease of recording of color_images.
Of late, in_view of highly detailed image recording, the_nozzle_orifice size of ink-jet heads has_decreased._However, when the nozzle orifice size_decreases,_ink_clogging and decap at the_nozzle section tend to occur. “Decap”_indicates a phenomenon of clogging at the nozzles caused_by evaporation of_a solvent (such as water)_contained_in_the ink. In order to minimize these problems, maintenance such_as suction_and wiping of_the nozzle section is more frequently performed, resulting in necessity_of longer maintenance time in addition to_image printing time. Specifically, at present, since higher printing rates are_demanded, an increase in time required for the_above maintenance due to the