Liquid developer for an electrostatic copying device

摘要

In an electrostatic copying machine which includes a member for bearing a latent image and a developing device. The developing device includes a member for applying developer liquid to the image bearing member, a container for holding developer liquid, a pump in the container, a supply pipe from the container to the applying member, a return pipe from the applying member to the container, and a filter in the return pipe. The filter has an impinging portion angularly disposed with respect to the flow of developer liquid and disposed above the surface of the developer liquid in the container during pumping and a toner accumulating portion which is immersed in the developer liquid in the container at least when the pump is not operating to soften and dispense any coagulated toner particles accumulated thereon.