The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 1992
Filed:
Oct. 04, 1990
Masaji Nishikawa, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A roller type liquid developing apparatus includes a developing solution tank for storing a developing solution in which charged fine color particles are dispersed, a developing head for applying the developing solution stored in the developing tank to a sheet-like recording medium so as to develop an electrostatic latent image formed on the sheet-like recording medium, and a suction pump for pumping up the developing solution from the developing solution tank and supplying the solution into the developing head by a negative pressure effect, and subsequently circulating the developing solution into the developing solution tank. The developing head includes a rod-like base, a developing slit constituted by an elongated opening formed in a surface of the rod-like base which corresponds to the sheet-like recording medium and having a length smaller than a width of the sheet-like recording medium, a hollow portion, formed to be continuous with the developing slit, for receiving the developing solution from the developing solution tank, and a developing roller which is arranged in the hollow portion so as to be rotated while the outer surface of the developing roller opposes an opening end of the developing slit and is capable of carrying the developing solution on the outer surface. In addition, a control means for controlling the rotation speed of the developing roller during and after developing a latent image is disclosed.