Disclosed is a soft tube of a sheet conveying portion of a sheet conveying roller, including: a region with irregularities in an outer peripheral surface of the soft tube. The region has a root mean square slope Sdq within a range of 0.03 to 0.50.

Disclosed is a soft tube of a sheet conveying portion of a sheet conveying roller, including: a region with irregularities in an outer peripheral surface of the soft tube. The region has a root mean square slope Sdq within a range of 0.03 to 0.50.

An apparatus and method for joining pipes includes a plate for melting mating surfaces of the pipes to be joined. Additionally, the apparatus utilizes a vacuum in order to push the first and second pipes together in lieu of hand or mechanical pressure which may be inconsistent. Additionally, the vacuum allows the pipes to be joined to settle on each other in order to create a pressure about a periphery of the end of the pipe being joined to the other pipe. The consistent pressure creates a very strong joint between the first and second pipes.

A substantially metal-free exhaust subsystem includes an exterior housing formed of polymer; and a pipe formed of a layered fibers formed at least partially of glass, and bound by an inorganic binder. The fibers may be glass or ceramic, and may define micro-pores on the interior of the pipe that aid in absorbing acoustic energy, and thereby attenuating exhaust noise.

A joining structure adapted to join adjacent tube structures together while providing high strength with low weight. The joining structure may be of composite materials, and may include warp tows in the longitudinal direction of the tubes and have weft tows cross-woven into a fabric, which may be a carbon fiber. The joining structure may be Y-shaped and adapted to join three composite sheets together. The weft tows may also be wound around a central cluster of tows, or tows, which may provide extra strength. The tubes may be pressurized in use, such as in an aircraft fuselage.

A joining structure adapted to join adjacent tube structures together while providing high strength with low weight. The joining structure may be of composite materials, and may include warp tows in the longitudinal direction of the tubes and have weft tows cross-woven into a fabric, which may be a carbon fiber. The joining structure may be Y-shaped and adapted to join three composite sheets together. The weft tows may also be wound around a central cluster of tows, or tows, which may provide extra strength. The tubes may be pressurized in use, such as in an aircraft fuselage.

A device for occluding a vasculature of a patient including a micrograft having an absorbent polymeric structure with a lumen of transporting blood. The micrograft has a series of peaks and valleys formed by crimping. The occluding device is sufficiently small and flexible to be tracked on a guidewire and/or pushed through a microcatheter to a site within the vasculature of the patient. Delivery systems for delivering the micrografts are also disclosed.

A device for occluding a vasculature of a patient including a micrograft having an absorbent polymeric structure with a lumen of transporting blood. The micrograft has a series of peaks and valleys formed by crimping. The occluding device is sufficiently small and flexible to be tracked on a guidewire and/or pushed through a microcatheter to a site within the vasculature of the patient. Delivery systems for delivering the micrografts are also disclosed.

A method and apparatus for constructing a tubular assembly 40 comprising an inner portion (24) and a further portion (23) surrounding the inner portion. The inner portion (24) comprises reinforcement (37) and the further portion (23) being formed from a strip (50) of material comprising two opposed longitudinal marginal side portions (53). The apparatus comprises an assembly station (220) comprising a wall (253). The apparatus comprises means for advancing the inner portion (21) along a first path (231) extending passed the wall (253), and means for advancing the strip (50) along a second path (232) and causing the strip to encircle the wall (253) and thereby wrap about and surround the inner portion (21). The apparatus further comprises means (321) for introducing resinous binder into the reinforcement (37) as the strip (50) is being wrapped about the inner portion (21).

A tube (10) and a method of constructing such a tube, the tube (10) being in the form of a composite film structure comprising a co-extrusion of a plurality of layers bonded together to provide an integrated structure. The layers comprise an inner layer (11), an intermediate layer (12) and outer layer (13). The intermediate layer (12) is of a material compatible with two adjacent layers (11, 13) between which it is interposed, wherein the intermediate layer (12) provides a bridge between the two layers (11, 13) to provide the tube (10) as an integrated structure. The exterior surface (15) of the tube (10) is optionally treated or modified or is provided with a coating, typically for bonding with another substance such as a resinous binder. A hollow structure in the form of a tubular element configured as a pipe and constructed using the tube (10) is also disclosed.