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:
Aug. 22, 1978
Filed:
Oct. 26, 1976
Martinus T Peters, Venlo, NL;
Oce-van der Grinten N.V., Venlo, NL;
Abstract
Polyethylene having an average molecular weight of at least 1,500, a crystallinity of at least 75% and a density of at least 0.93 has been found advantageous as a base material for making pressure-fixable toner powder for developing electrostatic images. The toner powder can be fixed satisfactorily to image substrates by the pressure of fixing rollers of conventional electrophotographic copying apparatus, yet it can be produced readily by grinding a suitable composition based on the polyethylene. The polyethylene preferably has an average weight of between 2,000 and 10,000, a crystallinity of at least 80% and a density of at least 0.94. Especially advantageous pressure-fixable, electrically conductive toner powders are obtained from pigmented masses of the polyethylene in which 3 to 20% of the weight consists of carbon black having a specific surface of at least 750 m.sup.2 /g, preferably of about 1,000 m.sup.2 /g, and an oil absorption of between 250 and 400 ml/g.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile