a combustion device which includes a forward section in which a baffle has been inserted for stalling the air and fuel mixture as it passes through the torch tip , generating a linear flame . the baffle is designed to include a substantially circular inner portion of wire screen , sintered powdered metal , or ceramic material , surrounded by a solid annular or substantially annular ring . a plurality of ribs extend between the annular ring and the inside of the tube for connecting the annular ring to the tube and for defining a number of outer passages through which air / fuel mixture may pass .