Abstract:
An apparatus for treating a stack of sheets of sheet material includes a means for moving the stack of sheets of sheet material towards a first and second fold roller means. The first and second fold roller means are arranged to assist with folding of the stack of sheets of sheet material. The apparatus also includes a first and a second clamping jaw defining a gap. The first and second clamping jaws are arranged to be movable relative to each other to increase and decrease the gap for selective application of a clamping force to the stack of sheets of sheet material having passed between the first and second fold roller means. The first and second fold roller means are mounted in a manner allowing for an increase and decrease in separation and thus between a stack-guiding configuration and a stack compressing configuration.
Abstract:
This folding device 1 comprises: a folding blade mechanism operation control mechanism 16 for operating a folding blade mechanism 13C provided in a folding cylinder 13; and a paper edge holding mechanism operation control mechanism 15 for operating a paper edge holding mechanism 13B provided in the folding cylinder 13, the folding blade mechanism operation control mechanism 16 and the paper edge holding mechanism operation control mechanism 15 being provided capable of activation based on a predetermined activating signal.
Abstract:
A folder has a jaw cylinder and a folding cylinder including a gripper for gripping an edge of a first signature and a tucking blade for tucking the first signature into the jaw cylinder. The folding cylinder includes a signature support supporting a second signature against the jaw cylinder, the signature support and the gripper being movable automatically together with respect to the tucking blade. A transfer cylinder, method and signature support are also provided.
Abstract:
In a sheet-fed rotary printing press, a gripper device includes a gripper pad, a gripper, a plurality of projections, and a non-attaching layer. The gripper pad includes a first gripping surface. The gripper includes a second gripping surface and cooperates with the gripper pad to grip a sheet. The plurality of projections are formed at least on one of the first gripping surface and the second gripping surface. The non-attaching layer is formed at least on a region among the projections. A method of manufacturing the gripper device is also disclosed.
Abstract:
A parallel folding device includes: a folding cylinder which transfers a signature; a first jaw cylinder having gripper boards; an upper second jaw cylinder in contact with the first jaw cylinder and having grippers; a lower second jaw cylinder in contact with and the first jaw cylinder and having grippers; and a cam mechanism, which switches delivery channels between a channel in which the signature is transferred from the gripper boards of the first jaw cylinder to only the grippers of any one of the upper and lower second jaw cylinders, and in which the signature is transferred to the grippers of the upper second jaw cylinder and the grippers of the lower second jaw cylinder; and a channel which concurrently performs the changing of phases for causing the respective gripper boards to operate, from the first jaw cylinder to the upper second jaw cylinder and/or the lower jaw cylinder.
Abstract:
A rotary folder includes two cutting devices for cross-cutting at least a first web. The cutting devices are cutting or counter cylinders that can rotate together and that define gaps in conjunction with a conveying cylinder. A path of web conveyance runs through each of these gaps. The conveying cylinder or the cutting cylinders support at least one blade for cutting of a product from the webs. The conveying cylinder comprises a retaining device for retaining a cut-off signature and for conveying the signature through the respective gap. The conveying cylinder or the counter cylinders comprise thrust bearings that interact with the blade.