US 4,563,589 AGranted

Ultraviolet curing lamp device

OwnerHerbert D. Schefferinventor

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Abstract

The present invention device is used for curing photopolymerizable products and includes a converging type cold mirror, an ultraviolet light source, a heat absorber behind the cold mirror, a back deflector behind the heat absorber, and a blocker tube and an ultraviolet light permeable window located in front of the ultraviolet light source. The various elements are arranged so as to provide four different air channels (two longitudinal currents and two cross currents) for cooling, enabling the device to be operated at greatly reduced temperatures as compared to prior art air cooled devices.

Claims5

Dependent claims

A device for curing ultraviolet light curable organic compound products which comprises:

(a) an ultraviolet light housing which includes an ultraviolet light permeable window;
(b) an ultraviolet light source of a longitudinal cylindrical nature contained within said housing;
(c) a cold mirror of the converging type having at least one focal point and being comprised of quartz with a multi-layer dichroic filter thereon to selectively reflect a broad band of ultraviolet light, and to transmit a high percentage of visible and infrared light, said cold mirror being contained within said housing in a longitudinally parallel relationship to said ultraviolet light source so as to selectively reflect ultraviolet light out of said housing through said window and to transmit visible and infrared light through said cold mirror, said cold mirror having its front surface facing said ultraviolet light source;
(d) an arcuated heat absorber located within said housing and behind said cold mirror so as to place said cold mirror between said heat absorber and said ultraviolet light source and so as to create an air space between the back of said cold mirror and the front of said heat absorber, said heat absorber having arcuated configuration running longitudinally parallel to said ultraviolet light source;
(e) an arcuated back deflector located within said housing and behind said heat absorber so as to place said heat absorber between said cold mirror and said back deflector and so as to create a space between said heat absorber and said back deflector, said back deflector having an arcuated configuration running longitudinally parallel to said ultraviolet light source;
(f) a blocker tube which is located within said housing and between said ultraviolet light source and said window, so as to reflect ultraviolet, visible and infrared light and so as to reduce non-ultraviolet light and heat from passing directly through said window;
(g) a first longitudinal current air channel contained within said housing so as to permit cooling air to flow longitudinally through the inside of said blocker tube;
(h) a second longitudinal current air channel contained within said housing so as to permit cooling air to flow longitudinally over the outside of said blocker tube, over said window and to some extent longitudinally over said ultraviolet light source and said front surface of said cold mirror;
(i) a first cross current air channel contained within said housing so as to permit cooling air to flow between said cold mirror and said heat absorber as a cross current at a right angle to the longitudinal dimension of said ultraviolet light source;
(j) a second cross current air channel contained within said housing so as to permit cooling air to flow between said heat absorber and said back deflector as a cross current at a right angle to the longitudinal dimension of said ultraviolet light source;
and,
(k) one or more air movement means capable of moving both of said longitudinal currents and both of said cross currents at a cooling rate so as to enable the operation of said ultraviolet light source at greatly reduced temperatures when measured at the focal point(s) of said cold mirror.

9 more elements

Dependencies are inferred from the claim text.

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Abstract

A device for curing ultraviolet light curable organic compound products which comprises:

(a) an ultraviolet light housing which includes an ultraviolet light permeable window;
(b) an ultraviolet light source of a longitudinal cylindrical nature contained within said housing;
(c) a cold mirror of the converging type having at least one focal point and being comprised of quartz with a multi-layer dichroic filter thereon to selectively reflect a broad band of ultraviolet light, and to transmit a high percentage of visible and infrared light, said cold mirror being contained within said housing in a longitudinally parallel relationship to said ultraviolet light source so as to selectively reflect ultraviolet light out of said housing through said window and to transmit visible and infrared light through said cold mirror, said cold mirror having its front surface facing said ultraviolet light source;
(d) an arcuated heat absorber located within said housing and behind said cold mirror so as to place said cold mirror between said heat absorber and said ultraviolet light source and so as to create an air space between the back of said cold mirror and the front of said heat absorber, said heat absorber having arcuated configuration running longitudinally parallel to said ultraviolet light source;
(e) an arcuated back deflector located within said housing and behind said heat absorber so as to place said heat absorber between said cold mirror and said back deflector and so as to create a space between said heat absorber and said back deflector, said back deflector having an arcuated configuration running longitudinally parallel to said ultraviolet light source;
(f) a blocker tube which is located within said housing and between said ultraviolet light source and said window, so as to reflect ultraviolet, visible and infrared light and so as to reduce non-ultraviolet light and heat from passing directly through said window;
(g) a first longitudinal current air channel contained within said housing so as to permit cooling air to flow longitudinally through the inside of said blocker tube;
(h) a second longitudinal current air channel contained within said housing so as to permit cooling air to flow longitudinally over the outside of said blocker tube, over said window and to some extent longitudinally over said ultraviolet light source and said front surface of said cold mirror;
(i) a first cross current air channel contained within said housing so as to permit cooling air to flow between said cold mirror and said heat absorber as a cross current at a right angle to the longitudinal dimension of said ultraviolet light source;
(j) a second cross current air channel contained within said housing so as to permit cooling air to flow between said heat absorber and said back deflector as a cross current at a right angle to the longitudinal dimension of said ultraviolet light source;
and,
(k) one or more air movement means capable of moving both of said longitudinal currents and both of said cross currents at a cooling rate so as to enable the operation of said ultraviolet light source at greatly reduced temperatures when measured at the focal point(s) of said cold mirror.

9 more elements