ES467832A1 - Methods and apparatus for forming multiply paper webs from a single headbox - Google Patents

Abstract

Method, with its corresponding machine, to form multi-layered papal sheets from a single main box with materials that share a mixture of fibers in a liquid carrier, and where the main box is provided with a main chamber that communicates with a dividing chamber constituted by separate walls that open into a dividing opening, characterized in that it includes the operations of: Feeding materials that may have different physical characteristics to each of a plurality of sub-chambers into which the main chamber of the main box is divided; Dividing the divider chamber into separate flow conduits respectively aligned with different sub-chambers of the main case, Receiving streams of the preceding paper from the respective sub-chambers in said flow conduits; Maintain separate streams of material in the flow conduits; Discharging streams in substantially laminar material streams through the divider aperture in a given formation zone between forming surfaces that move together in convergence; And keeping the jets of material separated between dividing means that extend a significant distance from said divider opening in the flow direction of the material jets during a sufficient interval to allow draining and partial formation of a layer of the fed paper by one of the jets of material on one of the forming surfaces before the material of a second stream of material is bonded, in laminar relationship of multiple layers with fiber felting, to the contiguous surface of the partially formed layer. (Machine-translation by Google Translate, not legally binding)