Patent ID: 8463158

Claim:
A unit frame comprising: a first plate having a plurality of through-holes; a second plate having a plurality of electrodes; a first beam extending between the first plate and the second plate, the first beam including a first grip disposed between an upper end of the first beam and a lower end of the first beam; a second beam extending between the first plate and the second plate; a first guide member disposed on the first plate, the first guide member having a through-hole and a first guide groove configured to guide a cartridge; and a second guide member disposed on the second plate, the second guide member having a second guide groove configured to guide a cartridge, wherein one of the plurality of through-holes of the first plate corresponds to the through-hole of the first guide member, and wherein the one of the plurality of through-holes of the first plate communicates to the through-hole of the first guide member.