US 12,276,932 B2
Electrophotographic method for providing foil images
Peter S. Alexandrovich, Rochester, NY (US); Diego A. Diaz, McKinney, TX (US); and David F. Cahill, Rochester, NY (US)
Assigned to EASTMAN KODAK COMPANY, Rochester, NY (US)
Filed by Eastman Kodak Company, Rochester, NY (US)
Filed on Sep. 20, 2022, as Appl. No. 17/948,394.
Claims priority of provisional application 63/252,254, filed on Oct. 5, 2021.
Prior Publication US 2023/0107991 A1, Apr. 6, 2023
Int. Cl. G03G 15/00 (2006.01)
CPC G03G 15/6582 (2013.01) [G03G 15/6585 (2013.01); G03G 2215/00801 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for providing a foil image on a receiver material without inkjet printing, the method comprising the following A) through D):
A) providing one or more color toner latent images in one or more color image areas on a surface of a receiver material, using corresponding one or more dry color toners, each corresponding dry color toner comprising dry toner particles comprising: a (a) polymeric resin, a (b) pigment colorant, and a (c) wax that has a crystalline melting temperature defined as Tcolor that is the temperature at the peak of a melting endotherm or the temperature at the peak of a main peak of multiple melting endotherms of the (c) wax;
B) simultaneously with or subsequently to A), providing one or more foiling toner latent images in one or more foiling image areas on the surface of the receiving material, using a dry foiling toner comprising dry foiling toner particles comprising: a (a′) polymeric resin and a (c′) wax that has a crystalline melting temperature defined as Tfoiling, that is the temperature at the peak of a melting endotherm or the temperature at the peak of a main peak of multiple melting endotherms of the (c′) wax,
wherein the one or more foiling image areas are different from the one or more color image areas, and Tfoiling is less than Tcolor by at least 15° C., wherein all of the one or more color image areas in A) are different from all of the one or more foiling image areas;
C) simultaneously fixing the one or more color toner latent images and the one or more foiling toner latent images on the surface of the receiving material, in a fuser oil-free fusing operation, to provide one or more corresponding fused color toner images and one or more corresponding fused foiling toner images; and
D) forming one or more foil images in the one or more foiling image areas and not in the one or more color image areas, by bringing a printing foil into intimate contact with the one or more corresponding fused foiling toner images at a foiling temperature (FT) that is greater than Tfoiling but less than Tcolor.