Abstract: Flexible tubular film is helically cut into a flat strip by feeding the tubular film in flattened form from a supply source to a film feeding means advancing the flat film tube at a predetermined velocity to a tube expansion zone in which the flat tube is expanded into a generally cylindrical tube and passed axially over a hollow mandrel slightly less in external diameter than the diameter of the expanded tube to be cut helically while on the mandrel into a flat strop that is removed at an angle to the mandrel axis. The tube is expanded in the zone by inflation with air fed through the mandrel in a direction countercurrent to the direction of tube movement and under a pressure sufficient to render the expanded tube stiff as it slides over the mandrel and resistant to deformation while being helically cut.
Abstract: Automated machine for the continuous bias cutting of an elongated tube of material, such a tubular knitted fabric, into a plurality of individual strips, and winding the strips into a plurality of rolls of fabric. The machine comprises a supply section, a spreading and tensioning section and a cutting and rolling section. The tubular material or fabric is stored in the supply section in a rotatable receptacle in the form of a stack of untensioned superimposed flattened folds. The tube is advanced axially from the supply to the cutting and rolling section of the machine by a plurality of skewed rotatable cylinders. As the flattened tube is withdrawn from the supply, it passes over a spreader which opens and tensions it. The rotatable skewed cylinders cause the advancing tube to rotate about its axis as it advances to be cut into strips.