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:
Oct. 31, 2006
Filed:
Mar. 11, 2003
Timothy Allen Pletcher, Easthampton, NJ (US);
David Keller, Newtown, PA (US);
Wen Ho, Plainsboro, NJ (US);
Eugene Samuel Poliniak, Willingboro, NJ (US);
John Paul Furda, Hamilton, NJ (US);
John Thomas Mcginn, Flemington, NJ (US);
Donald Chester Pultorak, Trenton, NJ (US);
Mortaza Kashef, Trenton, NJ (US);
Timothy Allen Pletcher, Easthampton, NJ (US);
David Keller, Newtown, PA (US);
Wen Ho, Plainsboro, NJ (US);
Eugene Samuel Poliniak, Willingboro, NJ (US);
John Paul Furda, Hamilton, NJ (US);
John Thomas McGinn, Flemington, NJ (US);
Donald Chester Pultorak, Trenton, NJ (US);
Mortaza Kashef, Trenton, NJ (US);
Sarnoff Corporation, Princeton, NJ (US);
Abstract
The invention is directed to a corona charging device having a powder feed with an outlet. The device has an internal charging cavity having an inlet and a charged powder outlet. The powder feed outlet is positioned at the internal charging cavity inlet. The device is adapted to guide a powder stream downstream from the powder feed outlet to the charged powder outlet. The device also includes a corona charger having one or more needle projections (each having a tip) positioned and adapted to facilitate a corona ion flow from the needle projections and intersecting the powder stream. The device also includes a rotating ground electrode adapted to be charged or grounded to attract the corona flow from the needle projections, and to rotate segments of the ground electrode between the internal charging cavity and a ground electrode cleaner.