improvement in carding apparatus intended for treating fibres of all kinds and more particularly textile fibres.

Claim 1

CARDING APPARATUS FOR FIBERS OF ALL KINDS, COMPRISING A MAIN FIRST CYLINDER FOR USE AS A SWIFT ONTO THE PERIPHERY OF WHICH THE FIBERS TO BE TREATED ARE BROUGHT, A DOFFER CYLINDER OF SMALLER DIAMETER THAN THE FIRST CYLINDER AND ARRANGED TO ROTATE PARALLEL TO THE FIRST CYLINDER AND ADJACENT THERETO, SAID DOFFER CYLINDER HAVING A PERFORATE PERIPHERAL WALL, AND MEANS FOR KEEPING AN INTERIOR SPACE OF SAID DOFFER CYLINDER UNDER REDUCED PRESSURE TO DRAW AIR THROUGH THE PERFORATIONS OF SAID PERFORATED WALL FOR HOLDING FIBERS THEREAGAINST SAID LAST-MENTIONED MEANS INCLUDING A FIXED HOLLOW STRUCTURE DISPOSED WITHIN THE PERFORATED ROTATING DOFFER CYLINDER AND HAVING THROUHOUT ITS LENGTH ON THE SIDE FACING SAID FIRST CYLINDER AT LEAST ONE APERTURE FORMING A SUCTION OPENING, SAID FIXED STRUCTURE BEING DIVIDED BY A LONGITUDINAL PARTITION INTO TWO COMPARTMENTS, SAID LAST-MENTIONED MEANS FURTHER INCLUDING A FAN AND MEANS FOR CONNECTING THE SUCTION SIDE OF THE FAN TO ONE OF SAID COMPARTMENTS AND THE DELIVERY SIDE OF THE FAN TO THE OTHER COMPARTMENT, SAID ONE COMPARTMENT BEING ALSO CONNECTED TO SAID SUCTION OPENING, AND SAID OTHER COMPARTMENT BEING EXPOSED TO SAID DOFFER CYLINDER FOR THE PURPOSE OF CLEANING THE SURFACE OF THE LATTER DURING ITS ROTATION.