Anti-marking Jackets Comprised of Fluoropolymer and Methods of Using in Offset Printing
AssigneePrinting Research, Inc.
InventorsHoward W. DeMoore, Joey V. Le
Life of this patent
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Abstract
In a printing press having a transfer cylinder for transferring a freshly printed substrate, an anti-marking device is provided. The anti-marking device comprises a flexible jacket comprised of fluoropolymer to engage the freshly printed substrate as it is transferred over the transfer cylinder, the anti-marking device removably attached with free play to the transfer cylinder. In an embodiment, a base cover is installed on the transfer cylinder between the anti-marking device and the transfer cylinder.
Claims20
A method of maintaining a printing press having a transfer cylinder, comprising:
- removing a flexible jacket from the transfer cylinder, wherein the flexible jacket is comprised of fluoropolymer;
- immersing the flexible jacket in a solvent to clean;
- attaching the flexible jacket to the transfer cylinder by a first edge of the flexible jacket;
- adjusting the free play of the flexible jacket;
- and
- attaching the flexible jacket to the transfer cylinder by a second edge of the flexible jacket.
A method of operating a printing press having a transfer cylinder, comprising:
- printing a substrate;
- supporting the substrate during at least a portion of the transfer of the substrate through the printing press with a flexible jacket attached to the transfer cylinder with an effective amount of free play, the flexible jacket comprised of fluoropolymer;
- and
- exposing the substrate to an artificial radiation source comprising at least one of an ultraviolet lamp and an infrared lamp.
A method of operating a printing press having a transfer cylinder, comprising:
- printing a first substrate;
- supporting the first substrate during at least a portion of the transfer of the first substrate through the printing press with an anti-marking device comprising a flexible jacket comprised of fluoropolymer to engage the freshly printed substrate as it is transferred over the transfer cylinder and a base cover attached to the flexible jacket at two edges to promote an effective amount of free play of the flexible jacket when the anti-marking device is installed over the transfer cylinder;
- inserting a non-porous material between the flexible jacket and the base cover from an unattached edge of the anti-marking device;
- while the anti-marking device remains installed over the transfer cylinder, cleaning the flexible jacket with one of a cleaning agent and a pressroom solvent;
- after cleaning the flexible jacket, printing a second substrate;
- and
- supporting the second substrate during at least a portion of the transfer of the second substrate through the printing press with the anti-marking device.
Dependencies are inferred from the claim text.