A method includes: extruding a continuous web of plastics material from an extruder of a hose making apparatus; helically winding the extruded web about a mandrel or at least one rotating rod of the hose making apparatus to form a wall of the hose about a central axis of the hose; extruding a continuous bead of plastics material to have a cross-section that defines a lumen at a location within the cross-section; cooling the extruded bead sufficiently to cool the plastics material adjacent the location within the cross-section of the extruded bead to cause the lumen to retain its size and shape within the cross-section; re-heating the extruded bead sufficiently to cause outer surface portions of the plastics material of the extruded bead to become molten; and helically winding the extruded bead onto and about an external surface of the wall to provide the wall a support helix.

The present invention relates to a hose line (1) for transporting abrasive media with an electrically conductive reinforcing element (5) running in or on the hose wall (2) and extending in the hose direction (6), wherein an insert (7) made of electrically conducting material is at least partially embedded in the hose wall (2) and extends in the hose direction (6) at a distance from the reinforcing element (5).

A pipe-forming apparatus with which a spiral pipe can be formed using a simple configuration without an inner periphery restriction body. A driving part (10) of a pipe-forming apparatus (3) presses a following strip portion (92) toward a pipe end portion (91e) of a preceding spiral pipe portion (91) obliquely with respect to a machine-height direction HD. A pipe end guide is constrained in a machine-width direction WD with respect to the pipe end portion, and slidably engaged in a propelling longitudinal direction LD. A pressing force for the following strip portion provides a fitting force between the following strip portion and the pipe end portion, and a propelling force for forward propulsion. A pipe is formed in a state where a part other than a partial part at which the pipe-forming apparatus is provided in a circumferential direction of the pipe end portion is released from the pipe-forming apparatus.

A pipe-forming apparatus with which a spiral pipe can be formed using a simple configuration without an inner periphery restriction body. A driving part (10) of a pipe-forming apparatus (3) presses a following strip portion (92) toward a pipe end portion (91e) of a preceding spiral pipe portion (91) obliquely with respect to a machine-height direction HD. A pipe end guide is constrained in a machine-width direction WD with respect to the pipe end portion, and slidably engaged in a propelling longitudinal direction LD. A pressing force for the following strip portion provides a fitting force between the following strip portion and the pipe end portion, and a propelling force for forward propulsion. A pipe is formed in a state where a part other than a partial part at which the pipe-forming apparatus is provided in a circumferential direction of the pipe end portion is released from the pipe-forming apparatus.

The invention provides methods and apparatus for producing a spirally wound pipe or pipe liner, and also to a web for forming a spirally wound pipe or pipe liner. One aspect of the invention provides a method and an associated machine of winding a helically wound pipe from a web (200) having transversely spaced apart connecting formations (310, 320) adapted to interlock when the web is wound in a helical path and adjacent edge portions (300a. 300b) of the web overlap one another, wherein an exterior support means (400) for the connecting formation at the terminus of the pipe being helically wound from the web is provided, and a radially outwardly directed force is applied against an inner face (220) of the web and the support means (400) to pinch connecting formations into interlocking engagement. A further aspect of the invention provides an elongated web (200) comprising a wall portion (210) bound by edge portions (300a. 300b) and adapted to form a pipe by spirally winding said web and joining adjacent said edge portions, wherein a distal end of joined edge portions (330) of the web projecting from the wall portion (210) of the web is less than a spacing distance defined by a spacer rib (350) projecting from the wall portion, when the web is spirally wound and adjacent edge portions are joined together.

The disclosure relates to medical tubes and methods of manufacturing medical tubes. The tube may be a composite structure made of two or more distinct components that are spirally wound to form an elongate tube. For example, one of the components may be a spirally wound elongate hollow body, and the other component may be an elongate structural component also spirally wound between turns of the spirally wound hollow body The tube need not be made from distinct components, however. For instance, an elongate hollow body formed (e.g., extruded) from a single material may be spirally wound to form an elongate tube. The elongate hollow body itself may in transverse cross-section have a thin wall portion and a relatively thicker or more rigid reinforcement portion. The tubes can be incorporated into a variety of medical circuits or may be employed for other medical uses.

The invention relates to production of long spiral-welded large polymer products, as required for pipelines production, chemical, oil and gas and petrochemical industries, agricultural complex and utility services. The object of the invention is to create variants of spiral-welded polymer product with a cellular wall, having the internal or external, or internal and external uniform smooth walls with little material consumption, weight and cost. It should allow making products on site due the use of a thin-walled, lightweight, flexible profile. The object is solved owing to fact that a long hollow thermoplastic profile is used in spiral-welded polymer products, wherein the cross-section of the profile has a form of a closed geometric figure with a convex part having essentially the semi-ring shape and flat part that are connected each other, forming the convex and flat parts of the external surface of the profile, respectively.

An elongated web or strip (200) comprising a wall portion bounded by edge portions and adapted to form a conduit by spirally winding said web and joining adjacent edge portions. The edge portions (210, 220) are adapted to permit relative movement between adjacent portions of the spiral conduit and thereby provide radial alteration of the conduit. The web includes a compensation portion (300) to alter the dimension of the web (200) upon radial alteration of the conduit and thereby compensate for creep in the spiral conduit. In a particularly preferred embodiment the edge portion comprises a primary lock (214, 224) and a secondary or sacrificial lock (212, 222). The sacrificial lock is disengaged by release of the mechanism 215 to permit relative movement there between and thereby effect radial alteration of the conduit.

An elongated web or strip (200) comprising a wall portion bounded by edge portions and adapted to form a conduit by spirally winding said web and joining adjacent edge portions. The edge portions (210, 220) are adapted to permit relative movement between adjacent portions of the spiral conduit and thereby provide radial alteration of the conduit. The web includes a compensation portion (300) to alter the dimension of the web (200) upon radial alteration of the conduit and thereby compensate for creep in the spiral conduit. In a particularly preferred embodiment the edge portion comprises a primary lock (214, 224) and a secondary or sacrificial lock (212, 222). The sacrificial lock is disengaged by release of the mechanism 215 to permit relative movement there between and thereby effect radial alteration of the conduit.

The disclosure relates to medical tubes and methods of manufacturing medical tubes. The tube may be a composite structure made of two or more distinct components that are spirally wound to form an elongate tube. For example, one of the components may be a spirally wound elongate hollow body, and the other component may be an elongate structural component also spirally wound between turns of the spirally wound hollow body The tube need not be made from distinct components, however. For instance, an elongate hollow body formed (e.g., extruded) from a single material may be spirally wound to form an elongate tube. The elongate hollow body itself may in transverse cross-section have a thin wall portion and a relatively thicker or more rigid reinforcement portion. The tubes can be incorporated into a variety of medical circuits or may be employed for other medical uses.