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:
Jul. 01, 1980
Filed:
Oct. 18, 1976
Applicant:
Inventor:
Gabor Forgo, Zurich, CH;
Assignee:
Elfotec A.G., Zumikon, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
430126 ; 96 1 / ; 252 / ; 252 6251 ; 430122 ; 430276 ; 430 10 ; 430937 ;
Abstract
Sharp, high-resolution copies of electrostatc images developed with a one-component magnetic toner can be obtained by corona transfer to a copy sheet if toner resistivity is at least 10.sup.13 ohm-cms. Such resistivity is attainable by incorporating carbon within the toner particles in an amount preferably about 1 to 1.3 per cent by weight, the surface of the toner particles either not having any carbon thereon or it being present in amounts of at most 0.7 per cent by weight.