Abstract: A carding machine has a cylinder (3), stationary, self-cleaning flats (2) fixed at a chain (45) and guided and adjusted by a flexible bend (48). Additional active trash, dust and short fibre extraction units (1) are placed in the main carding zone. The units (1) are constructed as separate units, removable and placeable, instead of stationary flats (2), between adjacent flats (2). The units (1) have the same principal width gauge as the flats (2) or a multiple of it. The units (1) are fixed and held the same way as the flats (2) by the chain (45) and the flexible bend (48). The machine achieves an excellent carding quality and is readily adjustable to different needs.