Abstract:
A positive control signature transferring assembly, for use in a lower folder, transports and diverts signatures under positive control. The assembly has a first positive control deceleration device having grippers for transporting some of the signatures of a stream of signatures to a first delivery stream. The assembly has a gripper cylinder containing a plurality of grippers for gripping a leading edge and a trailing edge of each of the remaining signatures in the signature stream for transporting the signatures on the gripper cylinder. A second positive control deceleration device has grippers for transporting the remaining signatures released by the gripper cylinder to a second delivery stream. In this manner, the signatures are positively controlled at all times and alignment and fixed pitch errors are significantly reduced.
Abstract:
A signature gripper having a gripper pad for firmly gripping a signature; a gripper base connected to the gripper pad, the gripper pad being rotatable about the gripper base in a direction of rotation; and a spring acting in the direction of rotation to permit rotation of the gripper pad about the gripper base and connected to at least one of the gripper base and gripper pad. The spring damps deceleration experienced by the signature upon gripping.
Abstract:
A method and device for diverting signatures is disclosed. A first cutting device partially cuts a web, while a second cutting device downstream of the first cutting device fully cuts the web so as to form a plurality of signatures. At least one first belt and at least one second belt hold the plurality of signatures, with the first belt having at least one first raised outer section and passing through at least part of the second cutting device, and with the second belt having at least one second raised outer section. The first and second raised outer sections interact to offset the plurality of signatures so as to define an alternating first stream and second stream of the plurality of signatures.
Abstract:
A web printing press is provided. The web printing press includes at least one printing unit printing images on a web, at least one press component in direct contact with the web, a cutting device for cutting the web into sheets and a controller transmitting a virtual master signal to the at least one printing unit and at least one press component. A sensor senses the at least one press component or directly senses the web downstream of the at least one print unit and generates a sensor signal. A processor receives the sensor signal and the virtual master signal, the processor transmits a modified virtual master signal to the cutting device as a function of the received sensor signal. Methods are also provided.
Abstract:
An apparatus for decelerating a signature comprises a movable belt arrangement, and a motor coupled to the movable belt arrangement for controllably moving the movable belt arrangement through a cyclical velocity profile. The movable belt arrangement is moved through a signature engaging section with the cyclical velocity profile causing the motor to decelerate the movable belt arrangement from a first speed to a second speed while engaging a signature in the signature engaging section. The signature enters the signature engaging section at the first speed, and leaves the signature engaging section at the second speed, lower than the first speed. The cyclical velocity profile causes the movable belt arrangement to accelerate upon the signature leaving the signature engaging section, back to the first speed, prior to a next signature entering the signature engaging section.
Abstract:
A transfer apparatus for a sheet material article trimmer includes a transfer element configured to grip the sheet material article and move the sheet material article in a transfer direction onto a side table of the sheet material article trimmer. A driver is provided, the driver being configured to move the transfer element at the same speed as the side table during period of time when the sheet material article is gripped by the transfer element and the side table is moving in the transfer direction.
Abstract:
A variable length cutting device includes a cutting cylinder and a transfer cylinder. The transfer cylinder cooperates with the cutting cylinder for cutting a ribbon into signatures having a desired cutoff length. An adjustable diameter portion of the transfer cylinder can be moved in a direction toward and away from the central axis of the transfer cylinder for adjusting the desired cutoff length of the signatures.
Abstract:
The present invention is directed to a method and apparatus for providing positive control of a printable medium in a printing system such that high speed processing of the printable medium can be achieved without damage to the product (e.g., printed signatures). Exemplary embodiments are directed to a carrier system which contacts (e.g., grips) the printable medium from both sides to provide positive control over the printable medium as it is transported from one area of positive constraint (e.g., a folding mechanism of a folder device) to another area of positive constraint (e.g., transport tapes and/or a signature deceleration device located downstream of the cutting cylinders).
Abstract:
The present invention generally relates to transporting signatures within a folding apparatus. Exemplary embodiments include at least one pair of cooperating cutting cylinders, each having at least one of a knife and an anvil. A conveying plane extends in substantially vertical direction. A right and a left conveyor assembly are assigned to the conveying plane. The cooperating cutting cylinders are integrated into the paths of conveying elements of the left and right conveyor assemblies, seizing a web of material prior to a cutting operation.
Abstract:
The present invention is directed to a method and apparatus for reorienting printable material, such as the signatures of a web fed rotary printing press, in a manner whereby a new velocity vector can be positively imparted to a signature instantaneously. Exemplary embodiments used selected portions of a drive mechanism to actively redirect the signatures with a new velocity vector. Because the new velocity vector is actively imparted to the signatures, exemplary embodiments provide a highly reliable reorientation of the signatures, without causing damage to the signatures, and without risking potential jamming of the printing press. Exemplary embodiments of the present invention not only preserve the quality of a shingled stream by providing an ability to retain the original lateral alignment and pitch of the incoming shingled stream, but in addition, exemplary embodiments can correct the pitch between signatures of an incoming shingled stream.