The D.I. Rotary Marathon Pleater is designed and manufactured for continuous high-speed pleating of filter media used in automotive, industrial, hydraulic, fuel, oil, HVAC, and air filtration products. Utilizing advanced rotary pleating technology, the machine produces highly uniform pleats with excellent dimensional accuracy and outstanding production efficiency. Built with a heavy-duty fabricated steel frame, precision rotary pleating rollers, automatic lubrication system, adjustable marking head, and optional PLC-based automation, the machine delivers stable operation, minimal maintenance, and long service life. Suitable for processing cellulose filter paper, synthetic filter media, glass fiber media, and specialty filtration materials, the D.I. Rotary Marathon Pleater integrates seamlessly with slitting machines, impregnation plants, curing systems, filter assembly stations, and complete turnkey filter manufacturing lines. The machine is fully customizable according to pleat depth, pleat pitch, media width, production speed, and customer-specific manufacturing requirements.