A paper tube that functions as a core of a rolled sheet, the paper tube includes an inside base paper layer at an inside peripheral surface of the paper tube; and an outside base paper layer at an outside peripheral surface of the paper tube, polyphenol and glycerin being impregnated in at least one of the inside base paper layer and the outside base paper layer.

A winding tube for glass fiber yarn has an inner cylinder and an outer polyester fabric covering. The inner cylinder is made of a composite having at least two sheets of polypropylene film bonded together, with each sheet having a plurality of parallel fiberglass filaments embedded within the film of that sheet, and with the filaments of one sheet being at an angle with the filaments of the other sheet. The fabric has a spiral stitching. The tube maintains a cylindrical shape when not subject to deforming forces yet has sufficient flexibility that after a desired amount of glass fiber yarn is wound on the winding tube, the winding tube can be radially collapsed sufficiently to permit the winding tube to be withdrawn from within the yarn package. The winding tube is dimensionally stable at the elevated temperatures to which is likely to be exposed.

A paper bobbin for winding yarn has an outer periphery provided with two annular protruding portions each adjacent to one of two ends of the paper bobbin respectively; since each protruding portion is protruded a height from the outer periphery of the paper bobbin, the two annular protruding portions may help the paper bobbin not only to lower the frequency of fiber breakage at initial stage of a yarn winding operation, but also to contribute to get a high quality of yarn and an increase in yield.

The present invention is an array of sanitary tissue products. The array of sanitary tissue products comprises a first packaged article and a second packaged article. The first packaged article comprises a first rolled sanitary tissue product wound onto a first fibrous core. The second packaged article comprises a second rolled sanitary tissue product wound onto a second fibrous core. The second rolled sanitary tissue product is wound loosely relative to the first rolled sanitary tissue product. The second fibrous core has an axial strength greater than the first fibrous core.

The invention describes a sleeve for sliding onto and removing from a winding shaft, which comprises a one-piece workpiece defining a cylinder, which workpiece comprises two edge regions each having an edge, the edge regions overlapping one another, the sleeve having a first diameter in a relaxed state, the sleeve in a clamped state having a second diameter which is different from the first diameter, the sleeve in the clamped state experiencing an elastic deformation as compared to the relaxed state.

A plastic film roll includes: a convolute cardboard tube including a tubular body having a tubular body wall formed by a plurality of layers of a straight rolled cardboard sheet having a weight equal to or less than 300 gsm; a plastic film wound about the convolute cardboard tube to form a plurality of plastic film windings around the convolute cardboard tube, the plastic film windings creating a radial compression force equal to or greater than 10 bar on the tubular body wall, wherein the cardboard sheet includes a plurality of fibers, at least a majority of the fibers being substantially aligned in a tangential direction relative to the tubular body to allow the convolute cardboard tube to resist the radial compression force.

A spool configured to support a roll of material. The spool comprises an arbor, a first flange, and a second flange. The first flange includes a first plurality of flange panels that are rotatably connected to respective arbor panels of the arbor at a first arbor edge of the arbor. The second flange is connected to a second arbor edge of the arbor. The first flange is configured to transition between a retention configuration and an open configuration. In the retention configuration, the roll of material is substantially prevented from removal from the arbor along an arbor axis by the first and second flanges. In the open configuration, the roll of material is removable from the arbor and receivable on the arbor in the arbor direction.

A method of grooving a durable transfer roll core may comprising loading the durable transfer roll core onto a grooving apparatus and grooving a main surface of the durable transfer roll core via engagement with one or a plurality of cutting tools of the tooling section of the grooving apparatus.

A collapsible reel having a high strength to weight ratio is provided. The collapsible reel comprises a core, around which a flexible media is wound, and flanges which prevent the wound flexible media from migrating axially off the core. The core is formed of first and second blanks having core portions and a plurality of spaced apart arms or tabs projecting from the core portions.

A cable reel for retaining a continuous length of cable is preferably constructed using an inexpensive plastic material, such as corrugated plastic. In one embodiment, the cable reel includes a hollow tubular core with a set of outward radial tabs integrally formed at each of its ends. A single, disc-shaped, interior support flange is mounted within the interior of the core in circumferential contact therewith to provide structural rigidity. Additionally, on each end of the core, an annular inner flange and a disc-shaped outer flange are disposed in coaxial alignment with one another against opposing surfaces of its corresponding set of radial tabs and are fixedly secured together as part of the assembly process. The multi-flange construction enables the thickness, diameter and/or material properties of the ends of the cable reel to be adjusted, as needed, to accommodate the strength and dimensional requirements of the intended application.