Patent ID: 9213255
Filing Date: 2015-12-15
Classification: G03G

Abstract:
1. A method of forming an electrophotographic image on a receiver medium having raised information providing a distinct tactile feel, comprising: forming a layer of non-marking particles onto the receiver medium using an electrophotographic process responsive to tactile image data, wherein the layer of non-marking particles is in direct contact with the receiver medium; forming one or more layers of marking particles over the layer of non-marking particles using an electrophotographic process responsive to visible image data, wherein a volume average diameter of the non-marking particles is at least 150% of a volume average diameter of the marking particles and is no more than 200% of the volume average diameter of the marking particles; and fusing the formed layers of non-marking particles and marking particles onto the receiver medium, wherein the layer of fused non-marking particles has a maximum thickness of at least 20 μm to provide the distinct tactile feel; wherein a surface charge density of the non-marking particles is between 30% and 60% of a surface charge density of the marking particles.