Liquid developing apparatus with a plurality of fountain and discharge slits

Claim 1

A liquid developing apparatus of the type in which a latent image carrier having a latent image carrying surface for carrying an electrostatic latent image is moved with the latent image carrying surface faced downwardly and a liquid developer is applied upwardly to the latent image carrying surface from a developing head located under the latent image carrier, thereby developing the electrostatic latent image, characterized in that said developing head comprises a plurality of fountain slits from which the liquid developer jets out, and a plurality of discharge slits through which used liquid developer is discharged, said fountain slits and said discharge slits are arranged alternately in parallel to each other and extend laterally with respect to the direction of movement of the latent image carrying surface of said latent image carrier, wherein cylindrical developer guides are provided under said fountain slits and said fountain slits communicate with said cylindrical developer guides, hollow pipe members are provided within said cylindrical developer guides, said hollow pipe members having supply openings through which the liquid developer is jetted out, and wherein said supply openings face downwardly through which liquid developer is jetted out against the cylindrical developer guides for flow about the hollow pipe members and for further jetting upwardly from said fountain slits.