Abstract: A roll supply having a pair of idler belts for supporting a supply roll of sheet material, stationary and movable knife blades, the latter having a V-shaped cutting edge, an eccentric for reciprocating the movable knife blade in one direction into cutting relation with the stationary knife blade, the movable knife blade having projections which rest on the stationary knife blade, a spring biasing the movable knife blade against the stationary knife blade, the movable knife blade being made of spring steel deformed into a slight V-shape relative to the stationary knife blade so that as the movable blade is reciprocated, the movable blade is displaced in a direction substantially normal to the direction of blade movement and a pair of cutting points are established which move together at the center, severing the sheet material, first and second roll pairs for advancing the sheet material to a cutting position, and control for actuating the roll pairs and the eccentric to cut the sheet length selected.