EXTRACTOR AND IMAGING FORMING APPARATUS EMPLOYING THIS EXTRACTOR

摘要

An extractor separates a dispersoid (toner) and a dispersion medium (carrier liquid) from a liquid sample (liquid developer) containing the dispersoid and the dispersion medium and extracts these. The extractor has a first roller that carries a thin layer of the liquid sample containing the dispersoid and the dispersion medium on a circumferential surface thereof and rotates about a shaft. A separating member is in contact with the first roller and separates the dispersion medium from the thin layer carried on the first roller. A charger charges the dispersoid in the thin layer carried on the first roller at a position upstream of a contact position of the separating member with the first roller with respect to a rotating direction of the first roller. An electric field generator generates an electric field for causing the charged dispersoid to be attracted to the circumferential surface of the first roller.