Crest Cell Clamshell; Crest Clamshell Platen Die Cutters; My Press Needs, Llc (Mpn), is a Leader in Clamshell Press Technology, Specializing in the Development, Engineering and Sales of Platen Clamshell Presses Worldwide. Our Versatile Crest Clamshells Accurately Diecut Virtually any Substrate, Including Falconboard, Ultra Board, Foam Core and more. the Crest's High Tonnage Capability, Precise Diecuts and Fast Make Ready Times Result in Increased Production and Profitability of Large Format, Printing Imaging ...