Abstract: The machine includes a feeding path for the logs to be cut and a cutting head arranged along the feeding path. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes at least a grinding unit, including at least one grinding wheel mounted onto a rotation shaft and co-acting with a side of the disc-shaped cutting blade to grind the cutting edge of the same disc-shaped cutting blade. A controlled approach system is also provided to move the grinding wheel towards the disc-shaped cutting blade.

Abstract: A stitcher (1) for connecting strips of rubber material (4, 5) into a substantially continuous strip according to this invention comprises a surface (3), a stitching head (6) placed over it having a stitch unit (7) for stitching the strips of rubber material together along a stitch line, which stitch line includes an angle ? having a longitudinal direction (L) of the continuous strip, a drive mechanism for driving a relative movement of the stitching head with respect to the surface along a first (X) and a second (Y) direction, wherein the second direction is oriented transverse to the first direction, and a control device (11) for controlling the drive mechanism such that the stitch unit follows the stitch line. In one embodiment the stitching head is rotatably connected to the drive mechanism wherein the axis of rotation extends transverse to the surface.

Abstract: An apparatus and associated method for dressing a workpiece. A first annular abrasive dressing element is attached to a base, an inner arcuate edge of the first annular abrasive dressing element defining a cavity. A second annular abrasive dressing element is also attached to the base and disposed in the cavity, an outer arcuate edge of the second annular abrasive dressing element noncontactingly separated from the inner arcuate edge of the first annular abrasive dressing element defining a circumferential space therebetween.

Abstract: A polishing apparatus comprise a lower surface plate rotatably provided and having a polishing surface for polishing an object, and an upper surface plate for pressing the object against the lower surface plate, wherein the polishing surface can be dressed by a dresser comprising a dressing member approachable to and separable from the polishing surface, the dressing member having a dressing surface to be brought into contact with the polishing surface, the dressing surface being shaped as a hollow oval.