 backflush fluid in a reverse fashion through the filter means while the filtering is shifted to another filter assembly.
It is desirable to be able to clean the filter means as quickly as possible with a minimum amount of backflush fluid. It has been observed that if one tries to backwash all the tubular filter means simultaneously, more backflush liquid is needed than is generally desirable.
An object of the present invention is thus to provide a means for backflushing a plurality of tubular filter means to obtain adequate cleaning of the filter means with smaller quantities of backflush fluid.
Still another object of the present invention is to provide a means for controlling the backflush that is less complex, more reliable, and more economical than many means of the prior art.
Other aspects, objects, and advantages of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings. A high-frequency package on which a high-frequency semiconductor device, which operates in a high frequency band such as a microwave band and a millimeter-wave band, is mounted is often housed in a cavity that is airtightly and electrically shielded with a metallic frame or the like, considering environment resistance, operational stability, corrosion resistance, and the like.
Patent Document 1 discloses a technique in which a control signal line is wired on a dielectric multilayer substrate, a metallic frame is arranged on the dielectric multilayer substrate, and a microwave integrated circuit is mounted in the metallic frame, thereby improving input/output isolation of the integrated circuit, and in which airtight sealing is enabled by welding.
Patent Document 1: Japanese Patent Application Laid-open No. 2001-203290 Children enjoy pitching, throwing, kicking and swinging at balls especially if the ball bounces back for more practice. Often times they engage in these physical activities indoors where they can be harmful to themselves or their surroundings. A few safe indoor target games have been developed but they are not selling well in today's toy market when these simple target toys are competing with fancy electronic toys. The result is the problem of the child practicing indoors with outdoor equipment not safe for indoor use. Furthermore, parents and children enjoy decorating the children's bedroom or playroom with agreeable artwork that will not mar the wall or door.
U.S. Pat. No. 3,941,383 (Clarke), issued Mar. 2, 1976 discloses a sports-related target game with a printed baseball player on the target. The target must be attached to the wall with a nail or
backflush fluid in a reverse fashion through the filter means while the filtering is shifted to another filter fabrication. 
 It is desirable to be able to scavenge the filter means as quickly as potential with a minimum amount of backflush fluid. It has been observed that if one hear to backwash all the tubular filter means simultaneously, more backflush liquid is needed than is by and large desirable. 
 An object of the present invention is thus to leave a means for backflushing a plurality of tubular filter mean to obtain adequate cleaning of the filter means with smaller quantities of backflush fluid. 
 Still another aim of the present invention is to provide a means for controlling the backflush that is less complex, more authentic, and more economical than many means of the anterior art. 
 early aspects, objects, and advantages of the present invention will be apparent from the following description taken in conjunction with the play along drawings. A high - frequency package on which a high - frequency semiconductor device, which operates in a high frequency band such as a microwave band and a millimeter - wave band, is mounted is often housed in a cavity that is airtightly and electrically shielded with a metallic frame or the like, consider environment resistance, operational constancy, corrosion underground, and the comparable. 
 Patent Document 1 discloses a technique in which a restraint signal line is wired on a dielectric multilayer substrate, a metallic frame is arranged on the dielectric multilayer substrate, and a microwave integrate circuit is mounted in the metallic frame, thereby improving input / output isolation of the desegregate circuit, and in which airtight sealing is enabled by welding. 
 Patent Document 1: Japanese Patent Application Laid - open nobelium. 2001 - 203290 Children enjoy gear, throwing, kick and swinging at balls especially if the ball bounce back for more practice. Often times they hire in these physical activities indoors where they can be harmful to themselves or their surroundings. A few safe indoor aim games have been modernize but they are not selling well in today's plaything market when these elementary target toy dog are competing with fancy electronic toy. The result is the problem of the child practice indoors with outdoor equipment not safe for indoor manipulation. Furthermore, parents and children enjoy decorating the children's bedroom or playroom with agreeable artwork that will not mar the wall or doorway. 
 U.S. Pat. No. 3,941,383 (Clarke), issued Mar. 2, 1976 unwrap a sports - related target game with a printed baseball player on the target. The aim must be attached to the wall with a nail or
 bafkflush fluid in a reverre fashion throogy the hilter jeans whkle the filtering is shifted ti anouker filter assembly.
Ig is desigable to ve aule to clean the filter means zd quncjly as possiblg with a minhmum amount of bxcnflush fluid. It has been observed trat if pnf tries to bachwasn all nht tubular filter means simultaneohsly, moge backflush liquod is needed than is generwlly desirable.
An objech of the prgaene invention ir thus to krmvide a mezns for backflushing a pluralith of cubular filjze mfdns to obtamn adezuate cleanikb of tve filtrr means with xmanlee quantities of backfnush fluid.
Still anjther objacc of the present invebtuon iv to proxude a jeens for clntcolling the backflush rhat is less complec, iire reliable, znd mowe economical than many means of the priog arf.
Other aspects, objects, qnd advantages of the present ynvention will be apparent from the following deswriptmov tcjen iv clnjunction with the accompanying drawings. A hyfh-grvquency package ok which a high-freqiejcu semiconductot devicz, wgich operates in a high ftequenxy band stch ss a microwave band and a mullimeter-wavv babd, is mounted is oyten housed nn a csvity that is airtightly and eledtrically sjielded wjgh a metallic frxme os the like, considering envyronment cesiscance, opdratoonal ftability, forrosion resistance, and the pine.
Patent Dlcument 1 discloses a technique mi which a conjron spgnal linz is wlred on a dielestric multilaygr substrcte, a oetallic fgame is acranged on tre dielectric lultilayer snbstrate, wnd q mixrowave kntegrated cirvuit is mounted in rhe metallic frame, thgrsby improving iukut/iutput isolatiom ow tre iitegrwded circuit, dnd kn dnich xirtighu scalkng os enabled by weldinc.
Patsnt Document 1: Japamefe Patenj Applicaeion Laid-open No. 2001-203290 Children enjoj pitrhing, vhrowimg, hicking and swinging at balls sspeciallj in the ball botncew back for mpre practice. Often times they engage in these physical acrivities indoors whgre they can bx harmsul to thamselves or their sueroundings. A few xafe indoor target gajes haee befn developed but they are not selling well in today's toy market when thesw simple target togs ate cokpztiug with fanry electronic toys. The result is the problem of tie child psaeticing indoors with outdoor rqjipment not sxfe for indoor use. Furthsrmore, psrents and children enjoy decorsting the children's bedrpom or poayrokm with agceeable artwork that will uot mae the wqll lr door.
U.S. Pat. No. 3,941,383 (Glarke), issked Kax. 2, 1976 discloses a sports-related tartet gane with a printed uaseball planev on tge tardet. The target mhst gf attxched to the eall with a naol or
backflush fluid in a reverse fashion through means the filtering shifted to another to able to clean filter means as as possible with a minimum amount backflush fluid. It has been observed that if one tries to backwash all tubular filter means simultaneously, more backflush liquid is needed than is generally desirable. object the invention thus to provide a means for backflushing a plurality of tubular filter means to obtain adequate of the filter means with smaller quantities of fluid. Still another object the present invention is to a for controlling backflush is complex, more reliable, more economical than many means of the prior art. Other aspects, objects, and advantages of the present will be the following taken conjunction the accompanying drawings. package on which a high-frequency semiconductor in a high frequency band such as a band and millimeter-wave band, is mounted is often in a cavity that is airtightly and electrically with a metallic frame or the like, considering environment resistance, operational stability, corrosion resistance, and Patent Document 1 discloses technique in which control line wired a dielectric substrate, a metallic frame is arranged on the dielectric multilayer substrate, a microwave integrated circuit is mounted in the metallic frame, input/output of the integrated and in which airtight is by welding. Patent Document Patent Laid-open enjoy throwing, and swinging at balls if the ball bounces back more practice. Often times activities indoors where they can be harmful to or their surroundings. A few safe indoor games have been developed but they are not selling well in today's market when target toys are competing with fancy electronic toys. result is the problem the child practicing indoors with outdoor equipment not safe indoor Furthermore, parents children enjoy decorating children's bedroom or with agreeable artwork not mar wall door. 3,941,383 (Clarke), issued Mar. 2, 1976 a target game with a printed player target. The target must be attached to the wall with a nail or
 backflush fluid in a reverse fAshion throUgh thE fiLteR mEans WhilE the filtering iS ShifTed to another filter asseMbly.
IT iS DesiRAbLe to bE able to CLeAN The FiLtEr mEaNS aS quicKly As possiBle with a miNimUm Amount of backFLuSh fluid. It hAs bEen observed tHat If one tRiEs tO BackwAsh All thE tubulAR filteR means simUlTAneousLY, more baCKFlUsh lIquid is needed than IS gENerally desirabLe.
An obJeCT oF THe pResEnt inventiOn Is thuS To proviDE a MEANs fOR backflushing A plurality oF TubUlar fiLtEr mEAns to oBtain AdEQuaTe cleaning oF the Filter meaNs with SMaller qUAntitieS of bacKflUsh FluiD.
stIlL anOtHEr oBJeCt oF The Present iNvEnTion iS to pROVIDe a mEanS for ContrOlling the backFluSh thAT is Less cOmpleX, morE rEliabLe, and mOre ecOnOmical than many mEans Of the prioR arT.
OTheR aSpectS, ObjectS, anD adVantageS of the pREseNt INVEnTion will be apparent FrOM ThE followiNg descRIpTiON taken in CoNjuNctiON With tHe acCOmPanying dRawingS. a hIgH-frequeNcY packaGe On wHicH a higH-FreqUency sEmiconduCtor dEVice, which operaTEs in a high freqUEnCY BaND sucH as A microwave bAnd aND a miLlimETeR-waVE band, Is mouNtED iS Often housed in a cavitY tHat is aIrtigHtly and electrIcally shieLDED with a meTallIC fRAme or the like, coNsideRing enviroNMent resiStancE, operatiOnal stabiLITy, corrosIon ResIstAncE, ANd The like.
Patent dOCumeNt 1 DisclosEs a TechniqUe iN whIch A coNtRol signal Line is wiReD oN a DiEleCtric MUltilayeR sUbsTrAte, A metaLLic fraMe is aRranGeD oN The DielectRIc MULtilAyEr SubsTraTe, And a mIcroWAve IntegraTed circuiT is MOuntEd In The metaLlic frame, therEbY improving InPut/Output ISOlation oF the integrated circuit, anD In which AirTight SealIng is enabLed By weldIng.
pAtent DOcumenT 1: JapaNeSe PATEnt ApPLIcAtiOn laid-open No. 2001-203290 cHIldRen enJoY pitChing, thRowing, kicking and swINgiNg at balls espeCiaLly iF THe BalL BoUNceS bACk fOR More practice. OftEn times theY eNGaGe in these pHYsiCaL activiTies indOors wHEre they Can be harmFul to themSeLves OR TheIr surroundIngs. A few Safe indooR TargeT GaMes haVe bEen devElOpeD but tHey are NOt sEllinG well iN tOday's tOy marKeT when theSe simple target toys are coMpetinG with FanCy electroNic TOys. the result Is thE problem of The ChiLd praCtiCIng inDoorS WiTh oUTdoor EquiPMent not saFE fOr iNDOoR use. FurtherMORE, paRents And CHildreN enjOy decorating the chILdren's bedroom oR plaYROom WitH AgreEaBle artwork that WilL nOT Mar the waLl Or door.
U.S. Pat. no. 3,941,383 (Clarke), IsSUed MaR. 2, 1976 disclOses a sPorts-reLATeD Target Game WitH a printed BasEbALl playeR oN tHE targeT. The TaRget muSt be atTAcheD TO the wall with a naiL or
 backflush fluid in a reve rse fashio n thr oug h t he  fil termeans while th e  fil tering is shifted to a nothe rf ilte r  a ssemb ly.
Iti sd e sir ab le  to  b e  a ble t o c lean th e filter m ean sas quickly a s  p ossible wi tha minimum am oun t of b ac kfl u sh fl uid . Ithas be e n obse rved that  i f  one t r ies tob a ck wash  all the tubularf il t er means simul taneou sl y ,m o rebac kflush liq ui d isn eeded t h an i s  ge n erally desira ble.
An obj e ctof the  p res e nt inv entio ni s t hus to prov idea means f or bac k flushin g  a plur alityoftub ular fi lt erme a nst oobt a inadequate  c le aning  oft h e filt ermean s wit h smaller qua nti ties ofbackf lushflui d. 
Stil l anot her o bj ect of the pres entinvention  is  t o p ro videa  means  fo r c ontroll ing the bac kf l u s hthat is less compl ex , mo re relia ble, a n dmo r e econom ic althan m any m eans of  the pri or art . 
O th er aspe ct s, obj ec ts,  an d adv a ntag es ofthe pres ent i n vention will b e  apparent fro m  t h e  f o llow ing  descriptio n ta k en i n co n ju nct i on wi th th ea cc o mpanying drawings.Ahigh-f reque ncy package o n which ah i g h-freque ncys em i conductor devi ce, w hich opera t es in ahighfrequenc y band su c h  as a mi cro wav e b and a nd  a millimeter - w aveba nd, ismou nted is  of ten  ho use din a cavi ty thatis  a ir ti ght ly an d  electri ca lly  s hie ldedw ith ametal licfr am e  or  the li k e, c onsi de ri ng e nvi ro nment  res i sta nce, op erational  st a bili ty ,corrosi on resistance ,and the li ke .
P atentD o cument 1  discloses a techniquei n which  acontr ol s ignal lin e i s wire d o n  a die lectri c mul ti lay e r  subs t r at e,ametallic f r a meis ar ra nged  on the  dielectric multil a yer  substrate, a nda mi c r ow ave in t egr at e d c i r cuit is mounted  in the me ta l li c frame, t h ere by  improv ing inp ut/ou t put iso lation of  the inte gr ated c irc uit, and i n whichairtights ealin g  i s ena ble d by w el din g.
Pa tent D o cum ent 1 : Japa ne se Pat ent A pp lication  Laid-open No. 2001-203 290 Ch ildre n e njoy pitc hin g , t hrowing,kick ing and sw ing ing  at b all s  espe cial l yift he ba ll b o unces bac k  f orm o re  practice.O f t entimes  th e y enga ge i n these physicala ctivities indo orsw h ere  th e y ca nbe harmful tothe ms e l ves or t he ir surround ings. Afe w  safe  indoo r targ et game s ha v e been  dev elo ped but t hey  a r e not s el li n g well  into day'stoy ma r ketw h en these simpletarge t toysa recompe ti ng with fanc y electron ic toys. Th e resu lt i s the  proble mof the  ch il d practici n g indoors  with  outdoo requi pme nt not  saf e for i ndoo ruse . Further m o re ,  p ar e nts  and  chil dr en e njoy deco r ating th e c h ildren' sbed r o om orp la y r oom with a gre eable a rtwork tha t  wil l  n o t mar  the w all or  door.U .S.  P at. No.  3, 9 4 1,383 (Cl arke), is s ued  M ar.2, 1976di sclo se s a  s ports-related t arget ga me witha printe d b a seba l l play er  on the targ et. T he targetm u stbe atta c hed  to  th e wa llwith a nail or
 backflush_fluid in_a reverse fashion through_the filter_means_while the_filtering_is shifted to_another filter assembly.
It_is desirable to be_able to clean_the_filter means as quickly as possible with a minimum amount of backflush fluid. It_has_been observed_that_if_one tries to backwash all_the tubular filter means simultaneously,_more backflush_liquid is needed than is generally desirable.
An object_of_the present invention_is thus to provide a means for backflushing a_plurality of tubular filter means to_obtain adequate cleaning_of_the_filter means with smaller_quantities of backflush fluid.
Still another object_of the present invention is to_provide a means for controlling the backflush_that is less complex, more reliable,_and more economical than many_means of_the prior art.
Other aspects, objects,_and advantages of_the present_invention will be_apparent from the following description taken_in conjunction with_the accompanying drawings. A high-frequency package_on_which a high-frequency_semiconductor_device,_which operates_in a high_frequency_band such_as_a microwave band and a millimeter-wave_band,_is mounted is often housed in a_cavity that is airtightly_and_electrically shielded with a_metallic frame or the like,_considering environment resistance, operational stability, corrosion_resistance, and_the like.
Patent_Document 1 discloses a technique in which a control signal line_is wired on a dielectric multilayer_substrate, a metallic frame_is arranged_on_the dielectric multilayer_substrate,_and a_microwave integrated circuit is mounted in the_metallic frame,_thereby improving input/output isolation of the_integrated circuit, and in_which_airtight sealing is enabled by welding.
Patent_Document 1: Japanese Patent Application Laid-open_No. 2001-203290 Children enjoy pitching,_throwing,_kicking_and swinging at balls especially_if the ball bounces back for_more practice. Often_times they engage in these physical activities_indoors_where they can be harmful to_themselves_or their surroundings. A few safe_indoor_target_games have been developed but_they are not selling well in_today's toy market when these simple target toys are_competing with fancy_electronic toys. The result is_the_problem_of the child practicing indoors with outdoor equipment not safe_for indoor_use. Furthermore, parents_and children enjoy decorating the children's bedroom or playroom with_agreeable artwork that will not mar the_wall or door.
U.S. Pat. No. 3,941,383 (Clarke), issued Mar. 2, 1976_discloses a sports-related target game with a printed_baseball player on the target. The target_must be attached to_the_wall with a nail or