Abstract:
A microwave-excited ultraviolet lamp system includes a microwave chamber supplied with cooling air from an air source. At least one of a pressure sensor or a temperature sensor is positioned within the system to sense a pressure associated with the flow of cooling air or a temperature of the lamp system. A control receives a signal from the sensor and is operable to adjust the flow of cooling air from the source to obtain a desired cooling air flow rate.
Abstract:
An ultraviolet radiation curing system is disclosed for treating a substrate, such as fiber optic cable or silicone tubing. The system comprises a processing chamber allowing transport of a continuous piece of substrate to be treated. As the substrate moves through the processing chamber, ultraviolet radiation from a plasma lamp activated by a microwave generator treats the surface of the substrate. The system comprises two elliptical reflectors of different sizes so that larger diameter substrates may be efficiently treated with ultraviolet radiation. The system may also comprise an ultraviolet-transmissive conduit enclosing the substrate and split into a first portion and a second portion, where the second portion is movable from the first portion to open the conduit and allow insertion or alignment of the substrate within the conduit and processing chamber.
Abstract:
A detector for an ultraviolet lamp system of the type having a microwave generator includes a first circuit that is configured to detect the microwave energy generated from the microwave generator. The first circuit includes at least one radiation sensitive component capable of failing upon exposure to an excessive amount of microwave energy. A second circuit is coupled to the first circuit and configured to intermittently test whether the radiation sensitive component has failed. An ultraviolet lamp system includes the detector. An associated method includes monitoring the microwave energy through the first circuit including at least one radiation sensitive component capable of failing upon exposure to an excessive amount of microwave energy and testing the radiation sensitive component to determine whether the radiation sensitive component has failed.
Abstract:
An ultraviolet lamp assembly and corresponding methods is operable to generate ultraviolet light for irradiating a substrate.. The lamp assembly includes a magnetron, an electrodeless lamp for emitting ultraviolet light when excited by microwave radiation generated from the magnetron, and a power control circuit arrangement configured to control an output power of the microwave radiation generated by the magnetron corresponding to the intensity of ultraviolet light produced by the lamp. A first control loop of the power control circuit is configured to regulate an input current to the magnetron based upon an input current setting associated with a desired intensity of UV light output of the lamp and a second control loop coupled to the first control loop configured to adjust the input current setting used by the first control loop to regulate the input current to the magnetron based upon an input power to the magnetron, which is proportional to the intensity of UV light output from the lamp.
Abstract:
A reflector for use in an ultraviolet or other type of lamp system having a plasma bulb. The reflector includes one or more longitudinally extending reflector panels having a characteristic shape that advantageously reflects ultraviolet radiation emanating from the bulb to provide a uniform irradiance over a relatively large surface area of a substrate. A substantial portion of each reflector panel has a characteristic shape described by the equation (x/a)(2+n)+(y/b)(2+m)=1, where a and b are constants and n and m are exponents that range between 0 and 2.
Abstract:
An electrical connector includes a receptacle and a plug. The receptacle includes a tubular housing having an axial bore and at least one electrical contact within the bore. The plug is received in the bore of the receptacle housing and includes a tubular core having an axial bore and at least one electrical contact that engages the electrical contact on the receptacle when the plug is coupled to the receptacle. The plug further includes a rotatable collar for securing the plug to the receptacle. A visual indicator on at least one of the plug core or the receptacle housing is visible through a window in the collar to provide a visual indication when the plug is fully coupled to the receptacle.
Abstract:
A radiation generating system for treating a coating on a substrate. A high voltage circuit provides power to a microwave generator that, in turn, supplies microwave radiation to drive a lamp. A current limiting device is connected between the high voltage circuit and the microwave generator, and a fault detector is connected to the high voltage circuit for providing an error signal in response to excess current being supplied to the microwave generator. A control is operative to interrupt a supply of AC power to the high voltage circuit in response to the error signal.
Abstract:
An ultraviolet lamp assembly includes an elongate lamp bulb, a central reflector mounted above the bulb and side reflector panels mounted on opposite sides of the central reflector panel. A first air gap is located between the first side reflector panel and the central reflector panel when the first and second side reflector panels are in the open position. A second air gap is located between the second side reflector panel and the central reflector panel when the first and second side reflector panels are in the open position. An air moving device is configured to direct cooling air downwardly through the perforations at the upper portion of the bulb and downwardly through the first and second air gaps at the lower portion of the bulb.
Abstract:
A non-contact electrostatic liquid dispensing system and method for dispensing continuous, high viscosity viscoelastic nonconductive liquid strands in a controlled manner onto a substrate. An applicator or gun having a charging electrode introduces an electrostatic charge to the high viscosity viscoelastic nonconductive liquid and as charged continuous fibrous strand of high viscosity viscoelastic nonconductive material. One or more electric fields are generated about the discharge path to impart a variety of movements or patterns to the charged continuous fibrous strand of high viscosity viscoelastic nonconductive liquid.
Abstract:
Apparatus for dispensing a mixture of two components comprises a dispenser device formed with a first passageway connected to a source of a Component A material, and a second passageway connected to a source of a Component B material, both of which are connected to a static mixer where the components are combined to form a mixture. The dispenser includes structure for purging the mixture of Component A and B from areas of the dispenser which come into contact therewith, and a check valve operative to create a suction within the dispenser and static mixer to prevent leakage of the mixture from the static mixer when flow of the components is interrupted.