The D.I. Pleating Machine (with Inline Slitter) is designed and manufactured for simultaneous slitting and pleating of filter media, eliminating separate slitting operations and significantly improving production efficiency. Combining a precision blade-type pleating mechanism with an integrated inline slitting unit, the machine delivers continuous processing with accurate media cutting and highly uniform pleat formation. Equipped with pneumatic blade control, multiple air-operated cylinders, a heavy-duty flywheel drive, precision roller feeding system, and user-friendly push-button controls, it provides stable operation, high production output, and long service life. Suitable for processing cellulose filter paper, synthetic filter media, composite filtration materials, and specialty industrial media, the machine integrates seamlessly with impregnation plants, curing systems, filter assembly equipment, and complete turnkey filter manufacturing lines. As part of the Dashmesh International 'Pleat Teacher' series, the machine can be fully customized according to pleat depth, pleat pitch, media width, slitting configuration, automation level, and customer-specific manufacturing requirements.