An apparatus including: a plurality of forming molds, each mold including: a leading edge; a trailing edge; a mold face; a plurality of first recesses in the mold face positioned across the mold face, each first recess in fluid communication with a first vacuum duct; a leading face extending from the leading edge in a direction away from the mold face; a trailing face extending from the trailing edge in a direction away from the mold face; wherein at least a portion of the leading face is recessed relative to the mold face proximal the leading edge or at least a portion of the trailing face is recessed relative to the mold face proximal the trailing edge; wherein the plurality of forming molds is arranged leading edge to trailing edge as a first mold belt.