Patent ID: 8007425
Filing Date: 2011-08-30
Classification: B26D,B65H

Abstract:
1. A suction roller for transporting flat material blanks and for use with a slit cover having passage holes, the suction roller comprising: (a) a roller axis; (b) a mantle surface; and (c) a plurality of suction slits running parallel to the roller axis and opening into the mantle surface; wherein suction air is applied to at least adjacent suction slits independently of one another; and wherein the passage holes align at least partially with the suction slits when a slit cover is disposed on the mantle surface in a selected manner; wherein each suction slit receives suction air applied via at least one respective axial channel disposed in at least one face of the suction roller and opening into the suction slit; wherein the axial channels have a circular cross-section, each axial channel having a channel diameter (D) that is at least as great as the sum of twice the suction slit width (B) of the associated suction slit measured in a circumferential direction and the width (A) of a mantle surface region remaining between two adjacent suction slits measured in the circumferential direction.