▁as ▁a ▁roll er ▁bla de ▁or ▁a ▁p izza ▁wheel ) ▁is ▁a ▁ut ens il ▁that ▁is ▁used ▁to ▁cut ▁p izz as . ▁ ▁History ▁The ▁first ▁p izza ▁cut ter ▁in ▁its ▁modern ▁form ▁was ▁invent ed ▁by ▁David ▁S . ▁Morgan ▁which ▁he ▁pat ented ▁on ▁September ▁ 2 0 , ▁ 1 8 9 2 . ▁However , ▁it ▁was ▁not ▁directly ▁meant ▁for ▁cutting ▁p izza ▁but ▁for ▁cutting ▁wall p apers . ▁ ▁Vari eties ▁There ▁are ▁two ▁main ▁types ▁of ▁p izza ▁cut ters . ▁ ▁The ▁most ▁common ▁uses ▁a ▁wheel ▁that ▁rot ates ▁in ▁a ▁circle ▁while ▁a ▁person ▁moves ▁the ▁cut ter ▁in ▁a ▁direction ▁that ▁they ▁would ▁like ▁to ▁cut ▁the ▁p izza . ▁Many ▁people ▁might ▁use ▁the ▁wheel ▁p izza ▁cut ter ▁for ▁other ▁things , ▁including ▁craft ▁work . ▁ ▁The ▁other ▁type ▁is ▁a ▁large ▁cur ved ▁kn ife ▁called ▁a ▁me zz al una ▁( Ital ian ▁for ▁" half ▁moon "), ▁which ▁is ▁rock ed ▁back ▁and ▁forth ▁to ▁cut ▁the ▁p izza . ▁These ▁two ▁types ▁of ▁p izza ▁cut ters ▁come ▁in ▁many ▁different ▁sizes . ▁ ▁Some ▁types ▁of ▁me zz al unas ▁( part icular ly ▁the ▁double - bl aded ▁type ) ▁are ▁often ▁used ▁to ▁m ince ▁her bs ▁or ▁ch op ▁veget ables . ▁ ▁References ▁ ▁Category : K itchen ▁kn ives ▁Category : P izza ▁Category : 1 9 th - century ▁invent ions ▁