Structured forming fabric

A pressing arrangement for use in a papermaking machine, comprising:

• a permeable first fabric;
• a permeable second fabric, a paper web being disposed between said first fabric and said second fabric;
• a pressure producing element being in contact with said first fabric;
• a support surface of a supporting structure being in contact with said second fabric;
• a differential pressure arrangement providing a differential pressure between said first fabric and said support surface, said differential pressure acting on at least one of said first fabric, the paper web and said second fabric, the paper web being subjected to mechanical pressure and experiences a hydraulic pressure so as to cause water to be drained from the paper web, the pressing arrangement being arranged to allow air to flow in a direction through said first fabric, the paper web and said second fabric, said first fabric including:
• a plurality of weft yarns;
• a plurality of warp yarns;
• and
• a woven fabric resulting in said first fabric from a repeating pattern of said weft yarns and said warp yarns, each said weft yarn in said repeating pattern having a sequence of starting at a starting point then sequentially going over only three adjacent warp yarns, under only one warp yarn, over only one warp yarn, under only three warp yarns, over only one warp yarn, and under only one warp yarn, said sequence repeating.