Method and apparatus for variable gloss reduction
View Patent ↗Various variable gloss reduction techniques are disclosed. In one embodiment, a gloss reduction technique is disclosed using a textured roller and a wiper impregnated with fuser oil to create a differential gloss pattern that reduces the gloss of an image printed on a substrate. In one embodiment, a gloss reduction technique is disclosed using a combination of heat and pressure to create a differential gloss pattern that reduces the gloss in specific regions of an image printed on a substrate. In one embodiment, a gloss reduction technique is disclosed using a differential gloss pattern to generate a security mark on a printed image to prevent against copying or fraudulent misrepresentation of the image.
1. A method for providing variable gloss reduction, comprising:
printing an image onto a substrate by applying a toner layer to the substrate;
applying a selected combination of heat and pressure to the substrate with a textured roller to imprint a high frequency texture onto the toner layer, such that a specular gloss of the image is reduced, said high frequency texture comprising a pattern greater than or equal to 150 lines per inch;
applying a coating of a fuser oil to the substrate for forming a barrier between the toner layer and the textured roller, such that adhesion of the toner layer to the textured roller is prevented;
wherein applying the coating of the fuser oil comprises a wiper impregnated with the fuser oil applying the fuser oil directly to the textured roller.
2. The method of claim 1 , wherein the wiper is configured to clean the textured roller in addition to applying the coating.
3. The method of claim 1 , further comprising:
adjusting any of the heat and the pressure associated with the textured roller to adjust the specular gloss of the image printed on the substrate.
4. The method of claim 1 , wherein the wiper is composed of a fabric that can retain the fuser oil.
5. The method of claim 1 , wherein the wiper is composed of a heat resistant felt fabric that can retain the fuser oil.