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:
Apr. 14, 1992
Filed:
Mar. 29, 1991
Michael P Goldowsky, Valhalla, NY (US);
William B Pennebaker, Carmel, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus for charging droplets of a volatile liquid and for directing the charged droplets against an oppositely-charged member. The apparatus comprises a source of a mist of uniform fine droplets of a volatile liquid and a droplet-charging zone associated with said source for applying a charge to the droplets in the mist. The droplet-charging zone comprises a source of ionized air ions for imparting the charge and a predetermined velocity to the droplets. A discharge conduit is provided having a discharge nozzle for directing the charged droplets against the surface of a member for attraction and deposit onto areas thereof charged to an opposite polarity. Preferably, the droplet-charging zone is associated with an air ionization zone comprising a source of air, a means for ionizing the air, and a means for directing the ionized air at a predetermined velocity into the droplet-charging zone to apply the charge to the droplets. Also, preferably the droplet-charging zone comprises oppositely-charged electrodes providing an alternating current therebetween for vibrating the air ions into contact with the droplets to assist the imparting of the charge of the air ions to the droplets.