These burners provide close coupling of radiant heat sources for use in “line” arrangements where relatively “light” heating jobs are to be performed. Designed essentially for heating moving webs, line burners also find frequent application in ovens, as well as in heating stationary objects. The 500 Series is available in a variety of cup configurations to permit several self-piloting geometric arrangements. The small 200 Series and large 700 Series, however, are currently available for straight-line use only.