Rotary die cutter

A die cutter comprising a rotatable cylinder, means for rotating said cylinder about its longitudinal axis, and a unitary sleeve fitted about said cylinder, said sleeve including means for cutting sheet material which contacts said sleeve, said cylinder includes means for securing said sleeve to said cylinder, said means for securing including first and second gibs, a notch defined in said cylinder accommodating said gibs, said gibs each defining an inclined mating surface, and means for sliding the first gib with respect to the second gib to urge said second gib against said sleeve, said means for sliding including an adjustment block positioned in said notch adjacent one end of said gibs, adjustable means extending from said block into said first gib to effect sliding movement thereof relative to the second gib into an expanded position, said adjustment block defining a slotted notch for accommodating said first gib in an expanded position of the sleeve.