Patent ID: 8201556

Claim:
A sheet driver for use in a medicament dispenser including a medicament carrier having a plurality of pockets for containing medicament wherein said pockets are spaced along the length of and defined between first and second sheets secured to each other and separable by drivable pulling action, said sheet driver comprising (a) a base; (b) extending from said base, a shaft defining a rotational axis; (c) at said base, a drive surface for receipt of drive to rotate the base about said rotational axis; (d) about said shaft, a torsion spring defining first and second spring legs; (e) mounting about the shaft and said torsion spring for rotation about the rotational axis, a hub defining a hub surface for receipt of a sheet of said medicament carrier, wherein a base leg receiver of the base receives said first spring leg of the torsion spring and a hub leg receiver of said hub receives said second spring leg of the torsion spring such that relative rotation of the base and the hub results in tensioning of the torsion spring; and wherein the hub is mounted to the base with the torsion spring wound to a tensed state and the hub and the base interact to prevent the torsion spring unwinding from its mounted tensed state.