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:
Jun. 23, 1992
Filed:
Sep. 27, 1990
Applicant:
Inventors:
Jeffrey L Clark, Nashua, NH (US);
Albert W Leclair, Hudson, NH (US);
Assignee:
Nashua Corporation, Nashua, NH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
4301066 ; 430110 ; 430126 ;
Abstract
Disclosed are toner compositions which comprise a toner particle having cleaning and lubricating agents added externally thereto. The cleaning and lubricating agents improve copy quality and extend the developer lifetime as they are electrically compatible with the toner particles over the duration of the developer lifetime. The external lubricating additive comprises a modified wax component having a relatively small percentage of a charge enhancing additive dissolved in a low molecular weight wax material. Optionally, the external additive may comprise amorphous silica particles and magnetite particles.