Abstract:
An ink-based digital printing apparatus includes an imaging member having a surface layer with regular texture. The regular texture includes an array of microstructures such as cavities. Methods include forming the imaging member textured surface using photolithography and molding processes.
Abstract:
A variable lithographic inking system includes a chamber blade system configured to supply ink to an anilox member of an inking system. The inking system includes a soft ink transfer roll and a hard form roll. Ink is transferred from the anilox roll to the form roll by way of the transfer roll, and from the form roll to a reimageable surface layer of an imaging member of a variable data lithographic system. An ink layer free of ink history is uniformly applied onto a surface of the form roll, and subsequently transferred to the reimageable surface layer while avoiding or substantially eliminating image ghosting related to inking non-uniformities.
Abstract:
A dampening fluid useful in offset ink printing applications contains water and a surfactant whose structure can be altered. The alteration in structure aids in reducing accumulation of the surfactant on the surface of an imaging member. The surfactant can be decomposed, switched between cis-trans states, or polymerizable with ink that is subsequently placed on the surface.
Abstract:
A system is provided for transferring a marking material from a ribbon to a substrate. The system includes a ribbon take-up device; a ribbon supply source that supplies the ribbon to the ribbon take-up device such that the ribbon is moved in a process direction; a pressure roll located between the ribbon supply source and the ribbon take-up device in the process direction, the pressure roll being configured to apply pressure to the ribbon at a pressure location when the ribbon is positioned between the pressure roll and the substrate; and a laser beam source that directs a plurality of laser beams through the pressure roll and onto the ribbon at the pressure location such that a marking portion of the ribbon is heated by the laser beams and transferred to the substrate.
Abstract:
A system for transferring a marking material from a ribbon to a substrate is provided. The ribbon has a marking material and a tie layer. The system includes a ribbon take-up device; a ribbon supply source that supplies the ribbon to the ribbon take-up device such that the ribbon is moved in a process direction; a first laser beam source configured to project a laser beam onto the ribbon to define an edge outline to a pattern of a marking portion of the marking material of the ribbon, the marking portion being a portion of the marking material of the ribbon that is to be transferred to the substrate, the first laser beam source being configured to create a weakening of the edge outline; and a heating unit configured to melt the tie layer of the ribbon at the marking portion, the melting taking place at a location where the ribbon is in contact with the substrate, the heating unit being configured to melt the tie layer such that the marking portion transfers to the substrate.