B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
204/109
B01J 19/08 (2006.01) B01J 19/12 (2006.01) B05D 3/06 (2006.01) B41F 23/04 (2006.01) F26B 3/28 (2006.01)
Patent
CA 1064859
ABSTRACT A system, designed to cure an ultraviolet sensitive coating on a substrate that is moving in a direction transverse to the radiation emitted from the system, which includes a plur- ality of arrays of short-arc ultraviolet lamps, each array lo- cated in a suitable housing. The arc of each lamp in a given array is located at the focus of an associated paraboloidal re- flector mounted within the housing so that at least half of the ultraviolet radiation emanating from the arc is reflected by the paraboloidal reflector to produce a collimated beam of ultra- violet radiation directed toward a concave spherical reflector whose center is located axially with the paraboloidal reflector. As measured between the two reflectors, the axis of the spheri- cal reflector normally forms a forty-five (45°) degree angle with respect to the axis of the paraboloidal reflector to reflect the collimated beam toward the substrate. Because of the con- cave surface of the spherical reflector, the radiant energy is focused to a small area on the substrate. This area is adjust- able over a wide range depending on the focal lengths of the spherical and paraboloidal reflectors which are chosen so as to arrive at the most desirable intensity of radiation for the par- ticular sensitivity of the coating being treated. Each array produces a set of disconnected high intensity image areas on the substrate, with the totality of arrays providing complete cover- age across the width of the substrate. Within each array, the spherical reflectors are mounted as an assembly within the hous- ing for pivotal movement into a position to reflect the focused beam 180 degrees from its normal direction so that no energy strikes the substrate when it is not in motion.
260140
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