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:
Feb. 15, 1977
Filed:
Jan. 21, 1975
Applicant:
Inventors:
W Raymond Buchan, Lincoln, MA (US);
Edward F Mayer, Acton, MA (US);
Assignee:
Itek Corporation, Lexington, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
B05B / ; G03G / ;
U.S. Cl.
CPC ...
118647 ; 355 / ;
Abstract
A novel development system for controlling the flow rate of developer through a narrow development zone, using a reservoir which has a feed chamber for maintaining a constant pressure head at the entrance to the narrow development zone. Developer flow is initiated upon demand by virtue of actuation of a valve positioned between the feed chamber and the entrance to the development zone; since considerable developer mixing occurs in the developer reservoir, mixing devices for mixing added toner with carrier beads may be simplified.