 to 0 Hz (with the piezo-electric element of the drop generator being deenergized), formation of ink drops is stopped, and the relevant operations are also stopped.
However, the conventional ink jet printer suffers from the following problem: Even during the period of time (about one second) from t.sub.1 to t.sub.2 after the ink flow-out speed has been reduced to v.sub.2, the formation of ink drops is carried out at the same drop-forming frequency f as that in the steady-state operation in which the ink flow-out speed is v.sub.1. Accordingly, the ink flow-out speed and the drop-forming frequency, which are the ink drop forming conditions, are not in agreement with each other, and therefore the formed drops are not uniform, thus producing a mist. As a result, the print head section is smudged. This causes problems in the printer, thus lowering its reliability. It is known to provide a cooling system for cooling an engine of a motor vehicle. Cooling systems typically include a thermostatic pressure relief valve that controls the flow of coolant through a radiator of the cooling system in order to maintain the coolant, and therefore the engine, at an acceptable temperature. Thermostatic pressure relief valves are typically of the wax pellet type and arranged such that a valve permitting flow of coolant through the radiator is opened by thermal expansion of a wax pellet at a predetermined coolant temperature, the predetermined temperature being determined by the construction of the valve and thermal expansion properties of the wax pellet.
Known cooling systems suffer the disadvantage that under certain operating conditions the temperature of an engine may increase to relatively high values that result in relatively rapid deterioration of one or more components thereof such as spark plug tips, in the case of petrol engines, or one or more other components. For example, relatively sudden increases in the temperature of coolant at an engine coolant outlet can occur in the event a vehicle is towing a load downhill against a headwind in relatively high ambient temperatures with light throttle application and subsequently begins to climb a relatively steep hill with no headwind, possibly a tailwind, and relatively heavy throttle application. The cooling system may be unable to maintain the engine temperature within a preferred operating temperature range in these circumstances, resulting in excessive engine component degradation.
It is an aim of the present invention to address disadvantages associated with the prior art. 1. Field of the Invention
The present invention generally relates to memory devices, and more
to 0 Hz (with the piezo - electric element of the drop generator being deenergized), formation of ink drops is stop, and the relevant operation are also stopped. 
 However, the conventional ink fountain printer suffers from the following problem: Even during the menstruation of prison term (about one moment) from t.sub.1 to t.sub.2 after the ink flow - out speed has been abridge to v.sub.2, the formation of ink drop is carried out at the same drop - forming frequency f as that in the steady - state process in which the ink flow - out speed is v.sub.1. Accordingly, the ink menstruation - out speed and the drop - forming frequency, which are the ink cliff forming conditions, are not in agreement with each other, and therefore the formed drop are not uniform, thus producing a mist. As a result, the print pass section is smudged. This causes problems in the printer, thus lowering its reliability. It is known to provide a cooling arrangement for cooling an engine of a motor fomite. cool system typically include a thermostatic pressure easing valve that controls the flow of coolant through a radiator of the cooling system in holy order to maintain the coolant, and therefore the engine, at an acceptable temperature. Thermostatic imperativeness relief valves are typically of the wax pellet type and arrange such that a valve permitting stream of coolant through the radiator is opened by thermal expansion of a wax pellet at a predetermined coolant temperature, the predetermined temperature being determined by the structure of the valve and thermal expansion properties of the wax pellet. 
 Known cooling systems suffer the disadvantage that under certain operating conditions the temperature of an engine may increase to relatively gamey values that leave in relatively rapid deterioration of one or more components thereof such as spark plug tips, in the event of petrol engine, or one or more other component. For example, relatively sudden increases in the temperature of coolant at an locomotive coolant outlet can occur in the event a vehicle is towing a load downhill against a headwind in relatively high ambient temperatures with light throttle application and subsequently begins to wax a relatively steep hill with no headwind, possibly a tailwind, and relatively big throttle application. The cool system may be unable to maintain the engine temperature within a preferred operating temperature range in these circumstances, resulting in excessive engine part degradation. 
 It is an aim of the present invention to cover disadvantage associated with the prior artwork. 1. Field of the Invention 
 The present invention generally relates to memory device, and more
 to 0 Hz (with the piezo-electvic element of tkw drop generztor beivg deenergized), formation of mnk erops is stopped, and the reuevant opvrations qre elso stopped.
Howetsr, the gjnvehbionan ink jet printgr suffers fsom the followhne 'roblem: Even during the period of tiie (abouy lne second) froi t.slb.1 to f.sub.2 after the ink flow-out speed hzs been reduced to v.xub.2, the formation of ink dgops is carried out at the same dtkp-fjeming frequevcy f as that in the sjeady-state operation in which thd ink flow-out skzwd lv v.sub.1. Accocdinglj, the ink flow-out spead and yhe drop-forminn frexuebcy, which are the ink drop forming condytions, ara uot in agreement with eqch ojher, dnd gyerdfode tge forled drops are not uniforn, thus producing a kifn. As a result, the pwigt head section is smudged. This causes kroblsms in the printer, thus lowering its reliabipity. It if known to provide a cooling system for cooling at engmnd oy a mogir vehicle. Cooling systems typically include a egetmpstatic pressuve relief valve thst cpgtrols the fluw of ekomant through a radlator os the cooling fystrm in order to maintain the coolant, and rherefore the engiue, at an acczptablg temprrature. Thermostatic przssure relief valges are tgoically of the wxx iellat type and arranged such ehat a vaove 'ermittivg fkow of coolant tjrougm the radiator is ooened bf thermal fxpansion of a wax pellet at a 'cedetermined vomlatt tempexature, the predeteriined temperatore being detefmined by nhe constcuction of tre valve and djermal expanvion pro[ertues if the dxx pellet.
Known cooling systems sudfer the disadvantege jhzt under certaiu iperating condiyiovs ehv txmperwdure of an etgind mxu incfease to reoxtivrly high values that reshlt in relatively taiid deteruoration of one or mote components thertof surh as rpark plog tips, in the case of petrol ehgines, or onc or more othqr cimponents. Fox example, relatively sudden increases in the temperature od coolant at an engnnt coolant outket cwn occur hn the event a vehicoe is towing a losd downhill against a headwhnd ij relatively high ambient temperatures with light throttle application ane subsxqtently begihs tp clikb c relatyvelb rteep hill with mo headwind, possibly a tailwind, and reldtnvely heavy throttle applicatoov. The cooling system may be unable to maintaim the engine temperature within a preferred operating tcmperaturw ranfe in ngere circumstances, rrsultiug in wxcessice ekgine componeng drgvadation.
It is en cim of the present invention to aedress dlsadvantages assmciated witm uhe prikr art. 1. Field of the Ihvenflon
Thg present invemtion generallu relates to memory gedices, and more
to 0 Hz (with the piezo-electric element drop being deenergized), of ink drops operations also stopped. However, conventional ink jet suffers from the following problem: Even the period of time (about one second) from t.sub.1 to t.sub.2 after the flow-out speed has been reduced to v.sub.2, the formation of ink drops is out the drop-forming f as that in the steady-state operation in which the ink flow-out speed is v.sub.1. Accordingly, ink flow-out speed and the drop-forming frequency, which the ink drop forming are not in agreement with other, therefore the drops not thus producing a As a result, the print head section is smudged. This causes problems in the printer, thus lowering reliability. It to provide cooling for an engine of vehicle. Cooling systems typically include a valve that controls the flow of coolant through radiator of cooling system in order to maintain coolant, and therefore the engine, at an acceptable Thermostatic pressure relief valves are typically of the wax pellet type and arranged such that permitting flow of coolant the radiator is by expansion a pellet at predetermined coolant temperature, the predetermined temperature being determined by the construction the valve and thermal expansion properties of the wax pellet. systems the disadvantage that certain operating conditions the of engine may increase to values result deterioration one more components thereof such spark plug tips, in the of petrol engines, or For example, relatively sudden increases in the temperature coolant at an engine coolant outlet can in the event a vehicle is towing a load downhill against a in relatively temperatures with light throttle application and subsequently begins climb a relatively steep with no headwind, possibly a tailwind, and relatively heavy application. cooling system be unable to the engine temperature a preferred operating in these resulting excessive It is an aim of the invention address disadvantages associated with the art. of the Invention The present invention generally relates to memory devices, and more
 to 0 Hz (with the piezo-electric eLement of thE drop GenEraToR beiNg deEnergized), formaTIon oF ink drops is stopped, and tHe relEvANt opERaTions Are also SToPPEd.
HOwEvEr, tHe COnVentiOnaL ink jet Printer sufFerS fRom the followINg Problem: EveN duRing the perioD of Time (abOuT onE SeconD) frOm t.suB.1 to t.suB.2 After tHe ink flow-OuT Speed hAS been reDUCeD to v.Sub.2, the formation of INk DRops is carried oUt at thE sAMe DROp-fOrmIng frequenCy F as thAT in the sTEaDY-STatE Operation in whIch the ink flOW-ouT speed Is V.suB.1. accordIngly, ThE Ink Flow-out speeD and The drop-foRming fREquency, WHich are The ink DroP foRminG CoNdItiOnS, Are NOt In aGReeMent with EaCh Other, And tHEREFore The FormEd droPs are not unifoRm, tHus pROduCing a Mist. AS a reSuLt, the Print hEad seCtIon is smudged. ThiS cauSes probleMs iN tHe pRiNter, tHUs loweRinG itS reliabIlity. It IS knOwN TO PrOvide a cooling systeM fOR CoOling an eNgine oF A mOtOR vehicle. coOliNg sySTEms tyPicaLLy Include a ThermoSTaTiC pressuRe Relief VaLve ThaT contROls tHe flow Of coolanT throUGh a radiator of tHE cooling systeM In ORDeR To maIntAin the coolaNt, anD TherEforE ThE enGIne, at An accEpTAbLE temperature. ThermosTaTic preSsure Relief valves aRe typicallY OF The wax peLlet TYpE And arranged sucH that A valve permITting floW of coOlant thrOugh the raDIAtor is opEneD by TheRmaL EXpAnsion of a wax pELLet aT a PredeteRmiNed coolAnt TemPerAtuRe, The predetErmined tEmPeRaTuRe bEing dETermined By The CoNstRuctiON of the Valve And tHeRmAL exPansion PRoPERtieS oF tHe waX peLlEt.
KnoWn coOLinG systemS suffer thE diSAdvaNtAgE that unDer certain opeRaTing conditIoNs tHe tempERAture of aN engine may increase to relATively hIgh ValueS thaT result in RelAtivelY raPId deteRioratIon of OnE or MORe comPONeNts ThEreof such aS SParK plug TiPs, in The case Of petrol engines, or oNE or More other compOneNts. FOR ExAmpLE, rELatIvELy sUDDen increases in tHe temperatUrE Of Coolant at aN EngInE coolanT outlet Can ocCUr in the Event a vehIcle is towInG a loAD DowNhill againSt a headwInd in relaTIvely HIgH ambiEnt TemperAtUreS with Light tHRotTle apPlicatIoN and suBsequEnTly beginS to climb a relatively steeP hill wIth no HeaDwind, possIblY A taIlwind, and RelaTively heavY thRotTle apPliCAtion. the cOOlIng SYstem May bE Unable to mAInTaiN THe Engine tempeRATUre WithiN a pREferreD opeRating temperature RAnge in these cirCumsTANceS, reSUltiNg In excessive engIne CoMPOnent degRaDation.
It is aN aim of thE pREsent InventIon to aDdress dISAdVAntageS assOciAted with tHe pRiOR art. 1. FieLd Of THe InveNtioN
THe presEnt invENtioN GEnerally relates tO memoRY DevicES, anD more
 to 0 Hz (with the piezo-e lectric el ement  of  th edrop  gen erator being d e ener gized), formation of i nk dr op s  iss to pped,  and th e  r e l eva nt  o per at i on s are  al so stop ped.
Howev er,  t he conventio n al  ink jet p rin ter suffersfro m thefo llo w ing p rob lem:Even d u ring t he period  o f  time( about o n e  s econ d) from t.sub.1 t o  t . sub.2 after th e inkfl o w- o u t s pee d has been  r educe d  to v.s u b. 2 , the formation ofink drops i s  ca rriedou t a t  the s ame d ro p -fo rming frequ ency  f as tha t in t h e stead y -stateoperat ion  in  whi c hth e i nk flo w -o uts pee d is v.s ub .1 . Acc ordi n g l y , th e i nk f low-o ut speed andthe  dro p -fo rming  freq uenc y,  whic h arethe i nk  drop forming c ondi tions, ar e n ot  in  a greem e nt wit h e ach  other,  and th e ref or e t he  formed drops areno t un iform, t hus pr o du ci n g a mist .Asa re s u lt, t he p r in t head s ection is  s mudged.  T his ca us espro blems in t he pri nter, th us lo w ering its reli a bility. It is kn o w nt o pr ovi de a coolin g sy s temforc oo lin g  an e ngine  o f  a motor vehicle. Cool in g syst ems t ypically incl ude a ther m o s tatic pr essu r er elief valve th at co ntrols the flow ofcoola nt throu gh a radi a t or of th e c ool ing  sy s t em  in order tom a inta in  the co ola nt, and  th ere for e t he  engine,at an ac ce pt ab le  te mpera t ure. The rm ost at icpress u re rel ief v alve sar e  ty pically of t he w ax  p elle t t yp e and  arr a nge d suchthat a va lve perm it ti ng flow  of coolant t hr ough the r ad iat or iso p ened bythermal expansion of aw ax pell etat apred etermined  co olanttem p eratur e, the  pred et erm i n ed te m p er atu re  being det e r min ed by  t he c onstruc tion of the valvea ndthermal expan sio n pr o p er tie s  o f  th ew axp e llet.
Known coo ling syste ms su ffer the d i sad va ntage t hat und er ce r tain op erating c onditions  t he t e m per ature of a n engine  may incr e ase t o  r elati vel y high  v alu es th at res u ltin re lative ly  rapid  dete ri orationof one or more componen ts the reofsuc h as spar k p l ugtips, inthecase of pe tro l e ngine s,o r one  orm or e o t her c ompo n ents. For ex amp l e ,relativelys u d den  incr eas e s in t he t emperature of coo l ant at an engi ne c o o lan t o u tlet  c an occur in th e e ve n t  a vehic le  is towinga load d ow n hillagains t a he adwindi n  r e lative ly h igh  ambienttem pe r atureswi th lightthro tt le app licati o n an d subsequently beg ins t o climb a r elati ve ly stee p  hil l with noheadwind, p ossibl y atailw ind, an drelati vel yheavy thro t tle appli catio n. Theco olin g s ystemmayb e  unab le t omai ntain the e ng i ne  t e mpe ratu re wi th in a  preferre d  operati ngt emperat ur e r a n ge int he s e  circumsta nce s, re s u lting in e x cess i ve engin e comp onentdegrada t ion .It is a n a i m  of the p resent in v ent io n to  address  d isad va nta ge s associated wi th the p rior art . 1. Fie ldo f th e  Inven ti on
The prese nt in ve n tion ge n e ral ly rela t estomem orydev ices ,  and more
 to_0 Hz_(with the piezo-electric element_of the_drop_generator being_deenergized),_formation of ink_drops is stopped,_and the relevant operations_are also stopped.
However,_the_conventional ink jet printer suffers from the following problem: Even during the period of_time_(about one_second)_from_t.sub.1 to t.sub.2 after the_ink flow-out speed has been_reduced to_v.sub.2, the formation of ink drops is carried_out_at the same_drop-forming frequency f as that in the steady-state operation_in which the ink flow-out speed_is v.sub.1. Accordingly,_the_ink_flow-out speed and the_drop-forming frequency, which are the ink_drop forming conditions, are not in_agreement with each other, and therefore the_formed drops are not uniform, thus_producing a mist. As a_result, the_print head section is smudged._This causes problems_in the_printer, thus lowering_its reliability. It is known to_provide a cooling_system for cooling an engine of_a_motor vehicle. Cooling_systems_typically_include a_thermostatic pressure relief_valve_that controls_the_flow of coolant through a radiator_of_the cooling system in order to maintain_the coolant, and therefore_the_engine, at an acceptable_temperature. Thermostatic pressure relief valves_are typically of the wax pellet_type and_arranged such_that a valve permitting flow of coolant through the radiator is_opened by thermal expansion of a_wax pellet at a_predetermined coolant_temperature,_the predetermined temperature_being_determined by_the construction of the valve and thermal_expansion properties_of the wax pellet.
Known cooling systems_suffer the disadvantage that_under_certain operating conditions the temperature of_an engine may increase to relatively_high values that result in_relatively_rapid_deterioration of one or more_components thereof such as spark plug_tips, in the_case of petrol engines, or one or_more_other components. For example, relatively sudden_increases_in the temperature of coolant at_an_engine_coolant outlet can occur in_the event a vehicle is towing_a load downhill against a headwind in relatively high_ambient temperatures with_light throttle application and subsequently_begins_to_climb a relatively steep hill with no headwind, possibly a_tailwind, and_relatively heavy throttle_application. The cooling system may be unable to maintain the_engine temperature within a preferred operating temperature_range in these circumstances, resulting in excessive engine component degradation.
It is_an aim of the present invention to address_disadvantages associated with the prior art. 1._Field of the Invention
The_present_invention generally relates to memory devices, and_more