Systems and methods for implementing a release film for a cleaning unit in an image forming device using digital offset lithographic printing techniques
View Patent ↗A system and method are provided for depositing a release layer/film on a cleaner roller in an image forming device to facilitate effective cleaning of a reimageable surface in an image forming device using a proposed variable data digital lithographic image forming architecture. A borax or other solute solution is deposited on a surface of a cleaner roller and an air knife is used to evaporate a liquid component of the solution causing the liquid to come off and a thin-film of borax or other solute to remain on the surface of the cleaner roller. The thin film layer is then dry at a point of contact with the reimageable surface to recover residual ink from the reimageable surface with the surface of the cleaner roller on top of the thin film layer. The thin film layer is re-wetted to support efficient transfer of the ink to a web.
1. A method for cleaning a reimageable surface in a variable data digital image forming system, comprising:
providing a cleaner roller for contacting a reimageable surface of an imaging member in a variable data digital image forming system at a cleaner nip;
wetting a cleaning surface component for separately cleaning the cleaner roller with a solvent, the solvent including a liquid component and a solid component suspended in the liquid component,
contacting a surface of the cleaner roller with the wetted cleaning surface component at a cleaning nip between the cleaning surface component and the surface of the cleaner roller, the cleaning surface component leaving a layer of the solvent on the surface of the cleaner roller;
evaporating the liquid component of the solvent prior to the surface of the cleaner roller contacting the reimageable surface at the cleaner nip leaving a release layer formed of the solid component of the solvent on the surface of the cleaner roller;
removing ink from the reimageable surface through contact of the reimageable surface with the cleaner roller at the cleaner nip;
re-wetting the release layer on the surface of the cleaner roller with the cleaning surface component after the surface of the cleaner roller passes through the cleaner nip collecting the ink from the reimageable surface to facilitate the removal of the ink from the surface of the cleaner roller; and
cleaning the surface of the cleaner roller via contact with the cleaning surface component.
2. The method of claim 1 , the liquid component of the solvent being self-evaporating.
3. The method of claim 1 , further comprising employing an evaporator device positioned downstream in a process direction of a position where the cleaning surface component contacts the surface of the cleaner roller to actively evaporate the liquid component of the solvent.
4. The method of claim 3 , the evaporator device being an air knife.
5. The method of claim 1 , the cleaner roller having a smooth hard surface.
6. The method of claim 1 , the cleaning surface component comprising a web material that is threaded from a supply roller around a pressure roller at a cleaning nip between the web material and the cleaner roller and to a take up roller.
7. The method of claim 1 , the cleaning surface component comprising a sponge surface on a roller component.
8. The method of claim 1 , the liquid component of the solvent being water.
9. The method of claim 1 , the solid component of the solvent being at least one of borax, salt, baking soda and Alconox®.