Gregory A Walter

US Patent:

6509697, Jan 21, 2003

Filed:

Jan 30, 2001

Appl. No.:

09/771671

Inventors:

Robert Ervin - Gaithersburg MD
Gregory Walter - Frederick MD
David Snyder - Frederick MD

Assignee:

Fusion UV Systems, Inc. - Gaithersburg MD

International Classification:

H05B 4124

US Classification:

315248, 315 3951, 315112, 315344, 347100, 313 35

Abstract:

A compact, electrodeless, microwave-powered lamp (e. g. , ultraviolet light emitting lamp) is provided, as well as methods of using this lamp. The lamp includes a microwave generator, waveguide and RF cavity. The RF slot between the waveguide and RF cavity, for introducing microwaves from the waveguide into the RF cavity, extends through an end member forming the RF cavity rather than through the elliptical-shaped reflector; and the RF slot is aligned with the bulb. Cooling air for cooling the bulb passes through the RF slot, and preferably this cooling air passes by both the bulb and microwave generator for cooling both. The bulb is rotated during use. The compact size of the lamp facilitates its use in small devices, such as inkjet printers for office use to cure ultraviolet light curable inkjet inks, among other uses.

US Patent:

59231220, Jul 13, 1999

Filed:

Apr 8, 1998

Appl. No.:

9/056646

Inventors:

Jerome D. Frank - Bethesda MD
Gregory Walter - Frederick MD
Pedro Lezcano - Gaithersburg MD
Miodrag Cekic - Bethesda MD

Assignee:

Fusion UV Systems, Inc. - Gaithersburg MD

International Classification:

H01J 6504

US Classification:

313607

Abstract:

An electrodeless lamp comprises an envelope containing a fill and a substance for facilitating the starting of the lamp. An outer tube is secured to an outside portion of the envelope in proximity to the given region and an inner tube is disposed within the outer tube such that a fluid passageway is defined between an inner surface of the outer tube and an outer surface of the inner tube. A hollow retractable electrode is provided within the inner tube, the electrode having a first position in which its tip portion is in proximity to the given region of the envelope when the lamp is being started and a second position in which the tip portion is away from the envelope after the lamp is started. A source of cooling fluid is operably connected to the hollow electrode such that the cooling fluid is forced through the hollow electrode and exhausted through the fluid passageway. A power source is operably connected to the electrode in the first position for applying an electric field to the substance to cause a discharge of the fill.