Patent ID: 9550908
Date: 2017-01-24
CPC Classifications: B41J,C08K,C09D

Claim:
1. An indirect printing apparatus comprising: an intermediate transfer member; a sacrificial coating on the intermediate transfer member, the sacrificial coating made from ingredients comprising: a coating mechanism for forming the sacrificial coating onto the intermediate transfer member; a drying station for drying the sacrificial coating; at least one ink jet nozzle positioned proximate the intermediate transfer member and configured for jetting ink droplets onto the sacrificial coating formed on the intermediate transfer member; an ink processing station configured to at least partially dry the ink on the sacrificial coating formed on the intermediate transfer member; and a substrate transfer mechanism for moving a substrate into contact with the intermediate transfer member, wherein the at least one hydrophilic polymer is polyvinyl alcohol having a hydrolysis degree ranging from about 75% to about 99.5% and weight average molecular weight ranging from about 8000 to about 30,000 g-mole