. For example, there are enumerated thermosensitive papers, pressure-sensitive papers, and thermosensitive printing materials. In addition, since the leuco dyes can realize a reversible color development system of the acid-base reaction, for example, reversible thermosensitive display materials comprising a combination of the leuco dye with a developer are known. The details of the reversible thermosensitive display materials are described in, for example, Polymer Preprints, Japan, Vol. 42, p. 736 (1993).
As the display material comprising a polymer having a leuco dye connected thereto by covalent bond are enumerated those disclosed in JP-A-11-181031. However, the display materials disclosed in this patent are of an irreversible color development system.
Further, as a display mode utilizing the phase change of a high-molecular weight gel are enumerated those disclosed in JP-A-11-236559 and JP-A-9-160081. However, the display materials disclosed in these patents still involve a problem such that the display contrast is low, and hence, its improvement has been demanded.
As the technology of complexing a high-molecular weight gel with a photo-functional material, high-molecular weight gels having a residue that can be ionically dissociated upon irradiation with light are disclosed in JP-A-62-55967. However, this residue involves a problem in stability of the chromophore, and hence, its improvement has been demanded.
As materials comprising a polymer having a leuco dye and a developer connected thereto by covalent bond are enumerated those disclosed in JP-A-11-181031. However, the materials disclosed in this patent relate to an irreversible display material comprising a combination with a functional group having an acid-proliferating function. Inserted blade cutting heads or routers are rotating cutting tools used particularly in wood working, for example, for the cutting of wood profiles which consist of a rotatable tool support body and a plurality of cutting blades mounted thereon circumferentially and evenly spaced from one another. The cutting edges of these cutting blades are ground corresponding to the contour of the profile to be cut.
It is important for such cutting heads with inserted blades that the cutting blades of the cutting head are all accurately positioned in axial as well as in radial directions so that all the cutting blades provide for the same cut. The accurate mounting of the various cutting blades must therefore be reproducible in a reliable manner.
Usually, such cutting heads have cutting blade mounting arrangements with a
. For example, there are enumerated thermosensitive papers, atmospheric pressure - sensible papers, and thermosensitive printing fabric. In summation, since the leuco dyes can realize a reversible coloring material exploitation system of the acerb - base reaction, for exercise, reversible thermosensitive display materials comprising a combination of the leuco dye with a developer are know. The details of the reversible thermosensitive display materials are described in, for example, Polymer Preprints, Japan, Vol. 42, p. 736 (1993). 
 As the display material comprising a polymer accept a leuco dye connected thereto by covalent bond are count those disclosed in JP - A-11 - 181031. However, the display materials disclosed in this patent are of an irreversible color growth system. 
 Further, as a display mode utilizing the phase change of a eminent - molecular weight gel are enumerated those disclosed in JP - A-11 - 236559 and JP - A-9 - 160081. However, the display materials disclosed in these patents still involve a problem such that the display contrast is low, and hence, its improvement has been demanded. 
 As the technology of complexing a high - molecular weight gelatin with a photograph - functional material, high - molecular system of weights gels having a residue that can be ionically dissociate upon irradiation with light are disclosed in JP - A-62 - 55967. However, this residue involve a problem in stability of the chromophore, and hence, its improvement has been demanded. 
 As materials comprising a polymer accept a leuco dye and a developer connected thereto by covalent bond are enumerated those disclosed in JP - A-11 - 181031. However, the material unwrap in this patent relate to an irreversible display material comprising a combination with a functional group having an acid - proliferating affair. Inserted blade cutting point or routers are rotating cutting cock used peculiarly in wood working, for example, for the cutting of wood profile which consist of a rotatable instrument support soundbox and a plurality of cutting blade mounted thereon circumferentially and evenly spaced from one another. The cutting edges of these cutting blades are ground corresponding to the contour of the profile to be cut. 
 It is significant for such cutting heads with slip in blades that the cutting blade of the cutting head are all accurately positioned in axial as well as in radial directions so that all the cutting blades provide for the like cut. The accurate mounting of the assorted cutting blades must therefore be reproducible in a reliable manner. 
 Usually, such cutting oral sex have cutting blade mounting arrangements with a
. Fog example, there are enumtrated thermosensnrive pepers, pdessure-sdnsitive papers, and thermoseisituve peinting materials. In aadition, spnce the oeuci dyes can csalize a reveddiblz rolor developmekt system ox the acid-base rdaetion, for example, reversible thermosqnsitivr fisplay materiwls boipriapnn a combination of the leuco dye with a developer arr known. The details of the revfrsible thermosensltive displqy mwrerials are aescribed pu, for exampme, Polymer Preprints, Japan, Vol. 42, p. 736 (1993).
Ax the dispoat mwjerial comprmsing w polymer haypng a lauco dyr connected thcreto by covalent bond are ennmerated those discljsed in J[-A-11-181031. However, the dispoat matgrialv dirxlored ii tgis pahenv are of an irreversiboe color developmenu srwtem.
Further, aa a difpjay mode utilizing the phase change of d hjgh-molecular weight gel are enumerated those discloseq in JP-A-11-236559 and JP-A-9-160081. However, the display materials divclosxd in tmese pahents still involve a problem such that the dyapkaj contrast is low, and hence, otd oiprovement har been dejanded.
As the technllogy os complexing a hign-molecular weight gel with q photo-functponao material, high-molzcular weighc gels havimg a residue that can bz ionidally dissofiated upkv irradiation wigh kicht are disclosed in JP-A-62-55967. Hjwever, thms rexidue ivvolfes a [roblem in stablnity of the chromoohore, atd hence, ihs improvement has been demandev.
Es materials vokprpsing a pjlymev having a leucj dye and a dereloper eonnecged theretk by cotalent bond wre enumerateg those disclmsed in TP-A-11-181031. Yowecer, the oaterials disckosed in nhns patent relate to an irreyersicme display matexnao comprising a vomcinwtpon wydh a functiotal erojl havkng an acid-irouifetating function. Insested blade cutting heacs or routgrs are rjtating cuttimg tools used partlculacly in wood wotking, for example, for the cuttihg of woof pvofiles which conwist of a rocatable tool support body and a pluralitb of cutting blades moonted thereon circumfgrektially and xvenly spaced fsom one another. The xutting edges of uhese cutting blades ars groutd cogresponding to the contour of the profile to be cut.
It is important for suxh cutvigg heads wifh imsertvd ylabes thae thx rutting blades of the cutting head are all accuretely posidijned in axial as well as in taaial directiovs so that all the cuttihg bladex provide for the same cut. The sccurate mounting of the various cuttjng blades must therefore be reprobuciblw in a eeliwble manner.
Usjalky, such cuthing hzads have cutting blade mounting qrrangwmfnts with a
. For example, there are enumerated thermosensitive papers, thermosensitive printing In addition, since a color development system the acid-base reaction, example, reversible thermosensitive display materials comprising combination of the leuco dye with a developer are known. The details of reversible thermosensitive display materials are described in, for example, Polymer Preprints, Japan, Vol. p. (1993). the material comprising a polymer having a leuco dye connected thereto by covalent bond are enumerated those in JP-A-11-181031. However, the display materials disclosed in patent are of an color development system. Further, as display utilizing the change a weight gel are those disclosed in JP-A-11-236559 and JP-A-9-160081. However, the display materials disclosed in these patents still involve a such that contrast is and its has been demanded. technology of complexing a high-molecular weight photo-functional material, high-molecular weight gels having a residue can be dissociated upon irradiation with light are in JP-A-62-55967. However, this residue involves a problem stability of the chromophore, and hence, its improvement has been demanded. As materials comprising a a leuco dye and developer connected thereto covalent are those in JP-A-11-181031. the materials disclosed in this patent relate to an irreversible display comprising a combination with a functional group having an acid-proliferating blade heads or routers rotating cutting tools used in working, for example, for of profiles a tool body and a plurality cutting blades mounted thereon circumferentially evenly spaced from one these cutting blades are ground corresponding to the of the profile to be cut. It important for such cutting heads with inserted blades that the cutting blades the cutting all accurately positioned in axial as well as radial directions so that the cutting blades provide for the same cut. The mounting the various blades must therefore reproducible in a manner. Usually, such have cutting mounting with
. For example, there are enumeraTed thermosEnsitIve PapErS, preSsurE-sensitive papeRS, and Thermosensitive printinG mateRiALs. In ADdItion, Since thE LeUCO dyEs CaN reAlIZe A reveRsiBle coloR developmeNt sYsTem of the acid-BAsE reaction, fOr eXample, reversIblE thermOsEnsITive dIspLay maTerialS CompriSing a combInATion of THe leuco DYE wIth a Developer are known. tHe DEtails of the revErsiblE tHErMOSenSitIve display MaTeriaLS are desCRiBED In, fOR example, PolymEr Preprints, jApaN, Vol. 42, p. 736 (1993).
AS tHe dISplay mAteriAl COmpRising a polyMer hAving a leuCo dye cONnected THereto bY covalEnt BonD are ENuMeRatEd THosE DiSclOSed In JP-A-11-181031. HowEvEr, The diSplaY MATEriaLs dIsclOsed iN this patent arE of An irREveRsiblE coloR devElOpmenT systeM.
FurtHeR, as a display mode UtilIzing the pHasE cHanGe Of a hiGH-molecUlaR weIght gel Are enumERatEd THOSe Disclosed in JP-A-11-236559 and Jp-A-9-160081. hOWeVer, the diSplay mATeRiALs discloSeD in ThesE PAtentS stiLL iNvolve a pRoblem SUcH tHat the dIsPlay coNtRasT is Low, anD HencE, its imProvemenT has bEEn demanded.
As thE Technology of cOMpLEXiNG a hiGh-mOlecular weiGht gEL witH a phOTo-FunCTionaL mateRiAL, hIGh-molecular weight geLs Having A resiDue that can be iOnically diSSOCiated upOn irRAdIAtion with light Are diSclosed in Jp-a-62-55967. However, This rEsidue inVolves a prOBLem in staBilIty Of tHe cHROmOphore, and hencE, ITs imPrOvement Has Been demAndEd.
AS maTerIaLs comprisIng a polyMeR hAvInG a lEuco dYE and a devElOpeR cOnnEcted THereto By covAlenT bOnD Are EnumeraTEd THOse dIsClOsed In Jp-A-11-181031. howevEr, thE MatErials dIsclosed iN thIS patEnT rElate to An irreversiblE dIsplay mateRiAl cOmprisING a combinAtion with a functional groUP having An aCid-prOlifErating fuNctIon. InsErtED blade CuttinG headS oR roUTErs arE ROtAtiNg Cutting tooLS UseD partIcUlarLy in wooD working, for example, FOr tHe cutting of woOd pRofiLES wHicH CoNSisT oF A roTATable tool supporT body and a pLuRAlIty of cuttiNG blAdEs mountEd thereOn cirCUmferenTially and Evenly spaCeD froM ONe aNother. The cUtting edGes of thesE CuttiNG bLades Are Ground CoRreSpondIng to tHE coNtour Of the pRoFile to Be cut.
it Is importAnt for such cutting heads wIth insErted BlaDes that thE cuTTinG blades of The cUtting head Are All AccurAteLY posiTionED iN axIAl as wEll aS In radial dIReCtiONS sO that all the CUTTinG bladEs pROvide fOr thE same cut. The accuraTE mounting of the VariOUS cuTtiNG blaDeS must therefore Be rEpRODucible iN a Reliable manNer.
UsualLy, SUch cuTting hEads haVe cuttiNG BlADe mounTing ArrAngements WitH a
. For example, there are e numeratedtherm ose nsi ti ve p aper s, pressure-se n siti ve papers, and thermos ensit iv e  pri n ti ng ma terials .  I n add it io n,si n ce  theleu co dyes  can reali zeareversible c o lo r developm ent  system of t heacid-b as e r e actio n,for e xample ,  rever sible the rm o sensit i ve disp l a ymate rials comprisinga  c o mbination of t he leu co dy e wit h a  developer  a re kn o wn. The de t a i lso f the reversi ble thermos e nsi tive d is pla y  mater ialsar e  de scribed in,  for  example,  Polym e r Prepr i nts, Ja pan, V ol.  42 , p. 73 6(19 93 ) .
A s  t hed isp lay mate ri al  comp risi n g a  pol yme r ha vinga leuco dye c onn ecte d  th ereto  by c oval en t bon d areenume ra ted those discl osed  in JP-A- 11- 18 103 1.  Howe v er, th e d isp lay mat erialsd isc lo s e d  i n this patent areof a nirrevers ible c o lo rd evelopme nt  sy stem . Furth er,a sa displa y mode ut il izing t he  phase  c han geof ah igh- molecu lar weig ht ge l  are enumerate d  those disclo s ed i nJ P-A- 11- 236559 andJP-A - 9-16 0081 .  H owe v er, t he di sp l ay materials disclosed  i n thes e pat ents still in volve a pr o b l em suchthat th e  display contr ast i s low, and hence, i ts im provemen t has bee n demanded .
A s t hetec h n ol ogy of comple x i ng a  h igh-mol ecu lar wei ght  ge l w ith  a  photo-fu nctional  m at er ia l,high- m olecular  w eig ht  ge ls ha v ing aresid ue t ha tc anbe ioni c al l y  dis so ci ated  up on  irra diat i onwith li ght are d isc l osed  i nJP-A-62 -55967. Howev er , this res id ueinvolv e s  a probl em in stability of thec hromoph ore , and  hen ce, its i mpr ovemen t h a s been  deman ded.As  ma t e rials c om pri si ng a polym e r  ha vingaleuc o dye a nd a developer con n ect ed thereto by  co vale n t  b ond ar e  en um e rat e d  those disclose d in JP-A- 11 - 18 1031. Howe v er,  t he mate rials d isclo s ed in t his paten t relateto  ani r rev ersible di splay ma terial co m prisi n ga com bin ationwi tha fun ctiona l  gr oup h avingan  acid- proli fe rating f unction. Inserted blade  cutti ng he ads  or route rsa rerotatingcutt ing toolsuse d p artic ula r ly in  woo d  w ork i ng, f or e x ample, fo r  t hec u tt ing of wood p r ofi les w hic h  consi st o f a rotatable too l  support bodyanda plu ral i ty o fcutting blades  mo un t e d thereo ncircumferen tially a nd evenl y spac ed fro m one a n o th e r. The  cut tin g edges o f t he s e cutti ng  b l ades a re g ro und co rrespo n ding t o the contour of  thep r ofile tobe cu t. 
It isi mpor tant for s uch cutting  heads  wit h ins erted b la des th atth e cuttingb lades ofthe c uttinghe ad a reall ac cura t e ly po siti on edin axiala s  w e ll  a s  in  rad ial d ir ecti ons so th a t all th e c u tting b la des p rovide fo r the same c ut.  Thea c curate mou n ting of the v arious  cutti ng blad e s m us t there for e be reprod ucible in a r el iabl e manner .Usua ll y,su ch cutting head s have c utting b l a de mou nti n g ar r angeme nt s with a
. For_example, there_are enumerated thermosensitive papers,_pressure-sensitive papers,_and_thermosensitive printing_materials._In addition, since_the leuco dyes_can realize a reversible_color development system_of_the acid-base reaction, for example, reversible thermosensitive display materials comprising a combination of the_leuco_dye with_a_developer_are known. The details of_the reversible thermosensitive display materials_are described_in, for example, Polymer Preprints, Japan, Vol. 42,_p._736 (1993).
As the_display material comprising a polymer having a leuco dye_connected thereto by covalent bond are_enumerated those disclosed_in_JP-A-11-181031._However, the display materials_disclosed in this patent are of_an irreversible color development system.
Further, as_a display mode utilizing the phase change_of a high-molecular weight gel are_enumerated those disclosed in JP-A-11-236559_and JP-A-9-160081._However, the display materials disclosed_in these patents_still involve_a problem such_that the display contrast is low,_and hence, its_improvement has been demanded.
As the technology_of_complexing a high-molecular_weight_gel_with a_photo-functional material, high-molecular_weight_gels having_a_residue that can be ionically dissociated_upon_irradiation with light are disclosed in JP-A-62-55967._However, this residue involves_a_problem in stability of_the chromophore, and hence, its_improvement has been demanded.
As materials comprising_a polymer_having a_leuco dye and a developer connected thereto by covalent bond are_enumerated those disclosed in JP-A-11-181031. However,_the materials disclosed in_this patent_relate_to an irreversible_display_material comprising_a combination with a functional group having_an acid-proliferating_function. Inserted blade cutting heads or_routers are rotating cutting_tools_used particularly in wood working, for_example, for the cutting of wood_profiles which consist of a_rotatable_tool_support body and a plurality_of cutting blades mounted thereon circumferentially_and evenly spaced_from one another. The cutting edges of_these_cutting blades are ground corresponding to_the_contour of the profile to be_cut.
It_is_important for such cutting heads_with inserted blades that the cutting_blades of the cutting head are all accurately positioned_in axial as_well as in radial directions_so_that_all the cutting blades provide for the same cut. The_accurate mounting_of the various_cutting blades must therefore be reproducible in a reliable manner.
Usually,_such cutting heads have cutting blade mounting_arrangements with a