Patent ID: 8210531

Claim:
A sheet-fed printing press comprising a treatment section that includes a cylinder having a gripper for gripping each of oncoming sheets by a claw block and a claw, and a treatment means for treating said sheet in proximity to or in contact with the surface of said sheet conveyed downstream in a sheet conveying direction while being gripped by the gripper, and plural cylinders disposed between the treatment section and a printing impression cylinder disposed upstream of the treatment section in the sheet conveying direction, each cylinder including a gripper having the same structure as that of the gripper, wherein a gripping surface of the claw block provided in the cylinder of the treatment section is formed into an inclined surface that comes closer to the rotational axis as it advances downstream in the sheet conveying direction of the cylinder, so as not to have the gripper of the cylinder contacting the treatment means, a gripping surface of a claw block provided in a first cylinder of the plural cylinders, most adjacent to the treatment section, is formed into an inclined surface that projects further through an outline of the cylinder as it advances downstream in the sheet conveying direction, a gripping surface of a claw block provided in a second cylinder of the plural cylinders, upstream of and adjacent to the first cylinder of the plural cylinders, is formed into an inclined surface that comes closer to the rotational axis as it advances downstream in the sheet conveying direction of the cylinder, and a gripping surface of a claw block provided in a third cylinder of the plural cylinders, which is closest to the printing impression cylinder, is formed into an inclined surface inclined at an angle smaller than the inclined angle of the gripping surface of the claw block of the cylinder provided in the treatment section.