Patent ID: 9164412
Filing Date: 2015-10-20
Classification: G03G

Abstract:
1. A digital printing apparatus comprising: a developing roller and an image carrying roller, the developing roller being arranged to transfer a portion of a quantity of liquid toner onto the image carrying roller in accordance with a charge pattern sustained on a surface of the image carrying roller; an upstream charger arranged upstream of an area of rotational contact between the developing roller and the image carrying roller; a downstream discharger arranged downstream of the area of rotational contact, wherein said downstream discharger is arranged opposite to a surface of the developing roller; a sensor arranged downstream of the area of rotational contact, the sensor being adapted to detect a property representative of the charge of a liquid toner residue downstream of the area of rotational contact; and a controller arranged to receive sensor data from the sensor and to provide a control signal to control the downstream discharger based on the received sensor data.