for ations ▁along ▁the ▁binding ▁edge ▁that ▁match ▁the ▁profile ▁and ▁spacing ▁of ▁the ▁binding ▁disc s . ▁▁ ▁Not ebook ▁sheets ▁are ▁removed ▁by ▁pe eling ▁the ▁per for ations ▁away ▁from ▁the ▁binding ▁disc s . ▁She ets ▁are ▁added ▁by ▁aff ix ing ▁the ▁per for ations ▁to ▁the ▁disc s . ▁She ets ▁can ▁be ▁transferred ▁between ▁disc - bound ▁not ebook s ▁of ▁different ▁functions ▁and ▁sizes , ▁provided ▁the ▁disc s ▁have ▁the ▁same ▁profile ▁and ▁spacing . ▁In ▁addition ▁to ▁using ▁paper ▁specifically ▁manufact ured ▁for ▁a ▁particular ▁disc - binding ▁system , ▁ordinary ▁paper ▁can ▁be ▁inserted ▁by ▁using ▁a ▁spe cially ▁designed ▁hole ▁p unch ▁to ▁per for ate ▁the ▁pages ▁to ▁conform ▁to ▁the ▁disc s . ▁ ▁Several ▁companies ▁have ▁manufact ured ▁or ▁distributed ▁disc - binding ▁systems . ▁These ▁include ▁the ▁Belg ian ▁firm ▁At oma , ▁the ▁now - def unct ▁Isra eli ▁brand ▁F lic , ▁Le ven ger ▁Company ▁( under ▁the ▁brand ▁name ▁Cir ca ) ▁in ▁the ▁US , ▁Cla ire font aine ▁( under ▁the ▁brand ▁' Cla iring ') ▁in ▁France , ▁Roll ab ind ▁in ▁the ▁US , ▁Office ▁Dep ot ▁( T UL ), ▁St ap les ▁( Ar c ), ▁and ▁William ▁Hann ah ▁in ▁the ▁UK . ▁ ▁In vention ▁and ▁pat ents ▁ ▁Andre ▁Tom as ▁and ▁Andre ▁Martin ▁( from ▁whom ▁the ▁At oma ▁brand ▁name ▁was ▁derived ) ▁invent ed ▁and ▁pat ented ▁the ▁first ▁disc -