摘要:
The method to radially displace liquid liner inside a pipe includes the step of flowing the liner around a distributive body placed within a pipe gas stream. As the gas streams past the distributive body, the liner coats the pipe homogeneously from top to bottom.
摘要:
A method for producing a container intended to contain a substance to be dispensed by an airless pump, having an external body inside which a bag is provided formed of thermoplastic material, the bag presenting, at least at a connection surface between its neck and its lateral surface, controlled deformation zones arranged to guide the bag deformation in accordance with preferential directions. The invention also relates to a container formed by the described method and a bag with the aforedescribed characteristics.
摘要:
A liner tube for repairing existing pipes is provided. The liner tube is sufficiently flexible to lie substantially flat under its own weight thereby defining an upper portion and a lower portion. The liner tube includes an inner layer, an outer layer disposed around the inner layer, a first intermediate layer disposed between the inner layer and the outer layer, the first intermediate layer being wrapped around the inner layer to overlap itself and define a first overlap portion in the upper portion, and a second intermediate layer disposed between the first intermediate layer and the outer layer, the second intermediate layer being wrapped around the first intermediate layer to overlap itself and define a second overlap portion in the lower portion. The first and second intermediate layers include a porous material and the inner layer includes material substantially impermeable to liquids.
摘要:
Method for manufacturing, and heat-insulated pipes comprising coaxial tubes sliding relative to each other with controlled friction: (a) applying a film (3) of non-adhesive and lubricating material onto the inner surface of a first outer casing tube (2) and/or onto the outer surface of a second inner carrier tube (1); b) fixing a series of spacers (4) made of heat-insulating material onto the inner carrier tube (1); c) coupling and centring the outer casing tube (2) on the inner carrier tube (1); d) mounting suitable sealing flanges (6) on the ends of said tubes (1, 2) coupled together; f) supplying, via the flange or flanges (6) and by suitable means (7), liquid resin which, as a result of subsequent expansion, fills completely the cavity (5) formed between said tubes (1, 2); g) removing the flanges.
摘要:
The disclosure is for an underground structure liner based upon an inflatable liner structure. An acid resistant layer is the innermost layer of an inflatable liner, and the liner is coated with epoxy resin on its outermost surface, the surface which contacts the existing walls of the underground structure. The outermost coated surface of the liner is constructed with a fibrous fleece layer for better retention of the epoxy and better adhesion of the epoxy to the walls of the underground structure. An added feature of the liner is a structure which also seals the liner to pipes entering the underground structure.
摘要:
Reinforcement of buried or inaccessible existing pipes is achieved by applying a reinforcement layer which includes a fabric portion. A pipe system structure is achieved which permits an internal or external surface of an existing pipe wall to be reinforced without removing a section of the pipe and without requiring the pipe to be out of service of a long period of time. The reinforcement layer overlays a portion of the internal or the external surface of the pipe. An adhesive material is then applied to the surface of the pipe or to the reinforcement layer for bonding the reinforcement layer to the surface of the pipe to develop a composite system between the existing pipe and the reinforcement layer.
摘要:
This invention relates to composite articles of manufacture and to a method for the preparation of these articles. The articles are impact-resistant, three-dimensional and rigid. The articles are comprised of two essential elements: (1) A pliable, hollow premolded outer plastics layer and (2) an essentially rigid non-cellular organic plastics structural backing member solidified in the hollow interior of the plastics skin, and essentially solidly filling said hollow interior. The hollow outer layer is prepared in a manner to have an access opening to its hollow interior. A liquid plastics composition is next prepared in a separate step that comprises an organic binder which solidifies at room temperature, in most cases by converting to a thermoset stage. This liquid composition is then introduced through the access opening into the cavity of the premolded outer layer. The liquid composition is then solidified in a manner to fill essentially voidlessly and fully the cavity of the outer layer, thus producing a dense tough integral article of manufacture having the shape of the premolded outer layer. Illustrative for the outer layer materials are plasticized polyvinylchloride compositions, polyethylene and rubbers. Illustrative for the interior component are epoxy resins, polyester resins, room temperature curing phenolics, filler containing polysulfide rubber, repolymerized depolymerized rubber and polyurethanes. Fillers may be present in the liquid compositions. By the favored method the outer plastics layer is kept in its original mold when applying and solidifying the liquid plastics composition in its hollow interior. Such mold is either a multipiece or an elastomeric mold permitting removal of the completed rigid article even if undercuts in the shape of the article are present.
摘要:
A method of forming metal tubing from very thin metal tape, wherein the tape is folded about a non-metallic tubing to convert the same into tubular form; the marginal edge portions of the tape providing tab portions extending radially and in contacting relation, the tab portions being metallically integrated at their outer edges and then folded about the base thereof into contact with the outer surface of the metal tubing; the non-metallic tubing being selectively (1) removed from the formed metal tubing; or (2) retained to form a liner for the metal tubing.
摘要:
A circular, helicoidal wave guide of given length is continuously formed by making a support of several endless ribbons arranged longitudinally around a fixed chuck to slide virtually along the whole length of the chuck, and applying on the sliding support the various components of the guide, and driving the guide along longitudinally as it is formed, to extract it from the chuck.
摘要:
This invention relates to a process for protecting a non-flat wall exposed to wear consisting in providing a coating made of a mortar containing synthetic resin on at least part of the surface to be protected. Accordingly one subjects prefabricated protective elements made of a mortar containing synthetic resins to a deformation, so that they adjust better to the form of at least part of the surface to be protected, one fastens these elements to said surface and one points flat the joints of adjacent coating elements.