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:
Dec. 31, 1991
Filed:
Dec. 28, 1989
Vincent T Kubert, Melbourne, FL (US);
Paul V Sadwick, Dayton, OH (US);
AM International, Inc., Chicago, IL (US);
Abstract
A transfer mechanism and method are provided for utilization in a high speed electrophotographic printing process of the type wherein the electrophotoconductive cylinder on which the image is formed travels at a peripheral speed of at least 100 ft./min. Transfer of the image is made to a continuous web of paper or the like travelling synchronously with the cylinder surface speed. A transfer corona focuses a narrow band of ions proximate the cylinder-web interface to attract at least 95% of the solids, toner particles from the cylinder to the travelling web. The charge on the transfer corona exceeds the charge on the image portions of the rotating cylinder by at least about 5,000 volts.