 a trivial challenge due particularly to the size requirements of the write element structures. Absent the use of alternative transducer designs that permit reductions in track pitch (as previously proposed by one of the applicants herein in commonly-owned patent application filings), or the use of complicated head rotation techniques as referred above, there is no conventional technique for dealing with the thermally induced track misregistration. Field of the Invention
The present invention relates to a developing cartridge attachable/detachable to/from a main body of an image forming apparatus, and an image forming apparatus that forms an image on a recording medium using an electrophotographic technology.
Description of the Related Art
In an image forming apparatus such as a printer using an electrophotographic technology, a photosensitive drum is first uniformly charged by a charging roller to form an image on a sheet such as a recording sheet. Next, the charged photosensitive drum is selectively exposed by an exposing apparatus to form an electrostatic latent image on the photosensitive drum. Further, the electrostatic latent image formed on the photosensitive drum is developed by a developing apparatus to form a toner image on the photosensitive drum. The toner image formed on the photosensitive drum is transferred onto a sheet. After that, the toner image transferred onto the sheet is heated and pressed to be fixed onto the sheet. Thus, an image is formed on the sheet. In addition, residual toner on the photosensitive drum after the toner image has been transferred onto the sheet is removed by a cleaning blade.
In such an image forming apparatus, it is generally necessary to perform the maintenance of processing means such as a photosensitive drum and a developing apparatus. Therefore, in recent years, a photosensitive drum, a charging roller, a developing apparatus, a cleaning blade, etc., are often integrated as a cartridge in order to facilitate the maintenance of processing means. Such a cartridge is called a process cartridge and attachable/detachable to/from a main body of an image forming apparatus. By employing such a process cartridge system, a user is allowed to facilitate the maintenance of processing means to form an image on a sheet. Here, a process cartridge has generally a drum unit provided with a photosensitive drum and a developing unit provided with a developing apparatus.
Here, in a technology disclosed in Japanese Patent Application Laid-open No. 2011-039564, a developing unit is attachable/detachable to/from a main body of an image forming apparatus as a developing cartridge. In addition, in the technology disclosed in Japanese Patent Application Laid-open No. 2011-039564, the main
a trivial challenge due particularly to the size requirements of the write chemical element structure. Absent the use of alternative transducer designs that allow reductions in track lurch (as previously nominate by one of the applicants herein in normally - own patent application filings), or the manipulation of complicated head rotation techniques as referred above, there constitute no conventional technique for dealing with the thermally induced track misregistration. battlefield of the Invention 
 The present invention relates to a developing cartridge attachable / detachable to / from a independent body of an image forming apparatus, and an image form apparatus that forms an image on a recording medium using an electrophotographic technology. 
 Description of the Related Art 
 In an picture forming apparatus such as a printer using an electrophotographic technology, a photosensitive drum is foremost uniformly charge by a charging roller to form an image on a sheet such as a recording sheet. Next, the charged photosensitive drum is selectively expose by an exposing apparatus to form an electrostatic latent prototype on the light-sensitive drum. Further, the electrostatic latent image formed on the photosensitive drum is developed by a developing apparatus to imprint a toner image on the photosensitive drum. The toner image formed on the photosensitive brake drum is transferred onto a sheet. After that, the toner image transferred onto the sail is heated and weight-lift to be fixed onto the sheet. Thus, an image is formed on the sail. In addition, residual toner on the photosensitive drum after the toner prototype has been transferred onto the sheet is removed by a cleaning blade. 
 In such an trope forming apparatus, it is broadly necessary to perform the maintenance of processing mean such as a photosensitive drum and a developing apparatus. Therefore, in late years, a photosensitive barrel, a charging roller, a develop apparatus, a cleaning blade, etc. , are much integrated as a cartridge in order to facilitate the maintenance of processing means. Such a cartridge is called a process magazine and attachable / detachable to / from a main body of an double forming apparatus. By employing such a process cartridge system, a user is allowed to help the maintenance of processing means to form an image on a sheet. Here, a process cartridge has by and large a barrel unit provided with a photosensitive drum and a developing unit supply with a developing apparatus. 
 Here, in a technology disclosed in Japanese Patent Application Laid - receptive No. 2011 - 039564, a developing unit is attachable / detachable to / from a main body of an persona forming apparatus as a developing cartridge. In addition, in the technology disclosed in Japanese Patent Application Laid - exposed No. 2011 - 039564, the main
 a hrivial challenge due pavticularly to thg wize rxquiremsnts of ghe write element structures. Avsent the use of alternativd transduber desigbs tiat permit reducvjons in track iitch (es previously ptoposed by ote of the applhcxncs herein in commonly-owned patent ap[licatipn filings), or thg use jf ckmplicated head rotation techniquea as reherred above, thrre is no conventional tecjniqke for dealing witj the thermqlly unduced tracy misregisurction. Field of the Invention
The present inxentipn relates ti a geveloping rartriqge attachable/detachdble to/grom a main bocy mf qn image forming appacatus, and an image fjrming ap[axatus that forms an inate on a racoraung mesinm hsing wn xlectrophotkgraphic texhnology.
Description os the Related Zrt
In wn image forming apparatus such as a prinuer uaing an electrophotographic technology, a phojosensitivq drum is first uniformly charged by a charging rmller go yirm av ilage on a sheet such as a recording sheet. Nexe, tne charged photofensitive dtul of selectively exposzs gy an exposing appwratus jo forn an elecuroststic latent image on the phitosensitive erum. Further, the epectrostatie latemt imsge formed on the photorensjtive drum ls develoldd by a developivg sp[aratus uu form a toner imwge on thx phocosensitkve crum. Tre toner ilage nmrmed on the photodensijive dsum is trajsferred onto a sheet. After thav, the toner ikace nransferrzd ontp the sheet if heated and ptessed to be fkxed onto nhe sheet. Thus, an imwge is formed ln the sheet. In addieion, resudual tuver on the phoyosensitine drun after the toner lmage gas been transfzxrtd onto the sheey ir rqmlvxd by d cleaning bnade.
Kn rich av image fornkng spparatus, it is genesallg necessary to pergovm the mauntenancq of processimg means such as a photmseisitivr dtum and a developing apparatus. Fherefore, in recent yearf, a ihotjsensitive drum, a charging roller, a developing ap'aratus, a cleaning bladw, etc., are often intggrsted as a certridde in ordar to facilitate the maintenance of pvocessing means. Such a cartrhdge ls called a process cartridge and attachable/detachable to/from a main body of an image formihg alparanus. Yy empljyinj ruch a process csrtridge system, a user is allowxd to facinicate the maintenance of procexskng means to worm an image on a sheet. Here, a lrocess cartridge has generally a drum unit provided wibh a photisensjtive drum and a developing init pxovidee with q deyeloping apparxtux.
Hcre, in a tfchnplkgy disclosed in Japanese Patent Applixahion Laid-open No. 2011-039564, a developlnn unit is atjachable/detachabls to/rgom a main body of an image formong apparatus as a dvvejoping cartridtv. In addition, in the technology visclosed in Japanese Patent Application Laid-open No. 2011-039564, the main
a trivial challenge due particularly to the of write element Absent the use permit in track pitch previously proposed by of the applicants herein in commonly-owned application filings), or the use of complicated head rotation techniques as referred above, is no conventional technique for dealing with the thermally induced track misregistration. Field the The invention to a developing cartridge attachable/detachable to/from a main body of an image forming apparatus, and an forming apparatus that forms an image on a medium using an electrophotographic Description of the Related Art an forming apparatus as printer an electrophotographic technology, photosensitive drum is first uniformly charged by a charging roller to form an image on a sheet as a Next, the photosensitive is exposed by an to form an electrostatic latent image drum. Further, the electrostatic latent image formed on photosensitive drum developed by a developing apparatus to a toner image on the photosensitive drum. The image formed on the photosensitive drum is transferred onto a sheet. After that, the toner onto the sheet is and pressed to fixed the Thus, image is on the sheet. In addition, residual toner on the photosensitive drum the toner image has been transferred onto the sheet is a blade. In such image forming apparatus, it generally to perform the maintenance means as and developing Therefore, in recent years, photosensitive drum, a charging roller, developing apparatus, a cleaning as a cartridge in order to facilitate the of processing means. Such a cartridge is a process cartridge and attachable/detachable to/from a main body of an image apparatus. By a process cartridge system, a user is allowed facilitate the maintenance of means to form an image on a sheet. Here, process has generally drum unit provided a photosensitive drum a developing unit a developing Here, a Japanese Patent Application Laid-open No. 2011-039564, developing is attachable/detachable to/from a main of forming apparatus as a developing cartridge. In addition, in the technology disclosed in Japanese Patent No. 2011-039564, the main
 a trivial challenge due partiCularly to tHe sizE reQuiReMentS of tHe write element STrucTures. Absent the use of altErnatIvE TranSDuCer deSigns thAT pERMit ReDuCtiOnS In Track PitCh (as preViously proPosEd By one of the apPLiCants hereiN in Commonly-owneD paTent apPlIcaTIon fiLinGs), or tHe use oF CompliCated head RoTAtion tEChniqueS AS rEferRed above, there is no COnVEntional techniQue for DeALiNG WitH thE thermally InDuced TRack misREgISTRatIOn. Field of the INvention
The PResEnt invEnTioN RelateS to a dEvELopIng cartridgE attAchable/deTachabLE to/from A Main bodY of an iMagE foRminG ApPaRatUs, ANd aN ImAge FOrmIng apparAtUs That fOrms AN IMAge oN a rEcorDing mEdium using an eLecTropHOtoGraphIc tecHnolOgY.
DescRiptioN of thE RElated Art
In an imAge fOrming appAraTuS suCh As a prINter usIng An eLectropHotograPHic TeCHNOlOgy, a photosensitive DrUM Is First uniFormly CHaRgED by a charGiNg rOlleR TO form An imAGe On a sheet Such as A ReCoRding shEeT. Next, tHe ChaRgeD photOSensItive dRum is selEctivELy exposed by an eXPosing apparatUS tO FOrM An elEctRostatic latEnt iMAge oN the PHoTosENsitiVe druM. FURtHEr, the electrostatic lAtEnt imaGe forMed on the photoSensitive dRUM Is develoPed bY A dEVeloping apparaTus to Form a toner IMage on thE photOsensitiVe drum. The TONer image ForMed On tHe pHOToSensitive drum IS TranSfErred onTo a Sheet. AfTer ThaT, thE toNeR image traNsferred OnTo ThE sHeeT is heATed and prEsSed To Be fIxed oNTo the sHeet. THus, aN iMaGE is Formed oN ThE SHeet. in AdDitiOn, rEsIdual ToneR On tHe photoSensitive DruM AfteR tHe Toner imAge has been traNsFerred onto ThE shEet is rEMOved by a cLeaning blade.
In such an imaGE forminG apParatUs, it Is generalLy nEcessaRy tO PerforM the maIntenAnCe oF PRocesSINg MeaNs Such as a phoTOSenSitivE dRum aNd a deveLoping apparatus. TheREfoRe, in recent yeaRs, a PhotOSEnSitIVe DRum, A cHArgING roller, a developIng apparatUs, A ClEaning bladE, Etc., ArE often iNtegratEd as a CArtridgE in order tO facilitaTe The mAINteNance of proCessing mEans. Such a CArtriDGe Is calLed A proceSs CarTridgE and atTAchAble/dEtachaBlE to/froM a maiN bOdy of an iMage forming apparatus. By eMployiNg sucH a pRocess carTriDGe sYstem, a useR is aLlowed to faCilItaTe the MaiNTenanCe of PRoCesSIng meAns tO Form an imaGE oN a sHEEt. here, a procesS CARtrIdge hAs gENerallY a drUm unit provided witH A photosensitivE druM ANd a DevELopiNg Unit provided wiTh a DeVELoping apPaRatus.
Here, in A technolOgY DisclOsed in japaneSe PatenT aPpLIcatioN LaiD-opEn No. 2011-039564, a deveLopInG Unit is aTtAcHAble/deTachAbLe to/frOm a maiN Body OF An image forming apParatUS As a deVEloPing cArTridge. IN AddiTion, in the tEchnology diScloseD in JApaneSe PatenT APplicaTioN LAid-open No. 2011-039564, tHE main
 a trivial challenge due p articularl y tothe  si ze  req uire ments of the w r iteelement structures. Ab sentth e  use of  alte rnative tr a n sdu ce rdes ig n sthatper mit red uctions in  tr ac k pitch (asp re viously pr opo sed by one o f t he app li can t s her ein  in c ommonl y -owned  patent a pp l icatio n  filing s ) ,or t he use of complic a te d  head rotation  techn iq u es a s r efe rred above ,there is no c o nv e n t ion a l technique f or dealingw ith  the t he rma l ly ind ucedtr a ckmisregistra tion . Field o f theI nventio n 
The pr esentinv ent ionr el at esto a d e ve lop i ngcartridg eat tacha ble/ d e t a chab leto/f rom a  main body of  an  ima g e f ormin g app arat us , and  an im age f or ming apparatusthat  forms an  im ag e o na rec o rdingmed ium  usingan elec t rop ho t o g ra phic technology.
D es c r ip tion ofthe Re l at ed Art
In a nima ge f o r mingappa r at us suchas a p r in te r using  a n elec tr oph oto graph i c te chnolo gy, a ph otose n sitive drum is first uniform l yc h ar g ed b y a  charging r olle r  toform an  im a ge on  a sh ee t  s u ch as a recording s he et. Ne xt, t he charged ph otosensiti v e drum issele c ti v ely exposed by  an e xposing ap p aratus t o for m an ele ctrostati c latent i mag e o n t hep h ot osensitive dr u m . Fu rt her, th e e lectros tat iclat ent  i mage form ed on th eph ot os ens itive drum isde vel op edby ad evelop ing a ppar at us toform at on e r  ima ge  o n th e p ho tosen siti v e d rum. Th e toner i mag e  for me don thephotosensitiv edrum is tr an sfe rred o n t o a shee t. After that, the tone r  imagetra nsfer redonto theshe et ishea t ed and  press ed to  b e f i x ed on t o  t hesh eet. Thus, a n i mageis  for med onthe sheet. In addi t ion , residual to ner  ont h epho t os e nsi ti v e d r u m after the ton er image h as be en transfe r red  o nto the  sheetis re m oved by  a cleani ng blade. 
I n su c h  an  image for ming app aratus, i t  is g e ne rally  ne cessar ytoperfo rm the mai ntena nce of  p rocess ing m ea ns suchas a photosensitive dru m anda dev elo ping appa rat u s.Therefore , in  recent ye ars , a  phot ose n sitiv e dr u m,  ac hargi ng r o ller, a d e ve lop i n gapparatus,a c lea ningbla d e, etc ., a re often integrat e d as a cartrid ge i n ord ert o fa ci litate the mai nte na n c e of pro ce ssing means . Such a  c a rtrid ge iscalled  a proc e s sc artrid ge a ndattachabl e/d et a chableto /f r om a m ainbo dy ofan ima g e fo r m ing apparatus. B y emp l o yings uch  a pr oc ess car t ridg e system,a user is a llowed  tofacil itate t he  maint ena nc e of proce s sing mean s toform an  i mage  on  a she et.H e re, a  pro ce sscartridge h as ge ne r all y adrumun it p rovided w i th a pho tos e nsitive  d rum a nd a d e ve l o ping unitpro vided w ith a deve l opin g  a p parat us.
He re, in  a tech n olo gy  disclo sed i n Japanes e PatentA ppl ic atio n Laid-o pe n No .201 1- 039564, a devel oping un it is at t a chable /de t acha b le to/ fr om a main bo dy of  a n  imagef o rmi ng appa r atu s a s a  dev elo ping cartridge. In addition,in t he te c hno logydiscl os ed in Ja p anes e Patent Application L aid-open No. 20 1 1-0 3 9564 , t h ema in
 a_trivial challenge_due particularly to the_size requirements_of_the write_element_structures. Absent the_use of alternative_transducer designs that permit_reductions in track_pitch_(as previously proposed by one of the applicants herein in commonly-owned patent application filings),_or_the use_of_complicated_head rotation techniques as referred_above, there is no conventional_technique for_dealing with the thermally induced track misregistration. Field_of_the Invention
The present_invention relates to a developing cartridge attachable/detachable to/from a_main body of an image forming_apparatus, and an_image_forming_apparatus that forms an_image on a recording medium using_an electrophotographic technology.
Description of the Related_Art
In an image forming apparatus such as_a printer using an electrophotographic technology,_a photosensitive drum is first_uniformly charged_by a charging roller to_form an image_on a_sheet such as_a recording sheet. Next, the charged_photosensitive drum is_selectively exposed by an exposing apparatus_to_form an electrostatic_latent_image_on the_photosensitive drum. Further,_the_electrostatic latent_image_formed on the photosensitive drum is_developed_by a developing apparatus to form a_toner image on the_photosensitive_drum. The toner image_formed on the photosensitive drum_is transferred onto a sheet. After_that, the_toner image_transferred onto the sheet is heated and pressed to be fixed_onto the sheet. Thus, an image_is formed on the_sheet. In_addition,_residual toner on_the_photosensitive drum_after the toner image has been transferred_onto the_sheet is removed by a cleaning_blade.
In such an image_forming_apparatus, it is generally necessary to_perform the maintenance of processing means_such as a photosensitive drum_and_a_developing apparatus. Therefore, in recent_years, a photosensitive drum, a charging_roller, a developing_apparatus, a cleaning blade, etc., are often_integrated_as a cartridge in order to_facilitate_the maintenance of processing means. Such_a_cartridge_is called a process cartridge_and attachable/detachable to/from a main body_of an image forming apparatus. By employing such a_process cartridge system,_a user is allowed to_facilitate_the_maintenance of processing means to form an image on a_sheet. Here,_a process cartridge_has generally a drum unit provided with a photosensitive drum_and a developing unit provided with a_developing apparatus.
Here, in a technology disclosed in Japanese Patent Application Laid-open_No. 2011-039564, a developing unit is attachable/detachable to/from_a main body of an image forming_apparatus as a developing_cartridge._In addition, in the technology disclosed in_Japanese_Patent_Application_Laid-open No. 2011-039564,_the main