The gamma-pyrones of formula I in which the symbols have the meaning given in Claim 1 are obtained by a simple and economic "one-pot" process by reaction of a furfuryl alcohol of formula III with at least 2 equivalents of a halogenated oxidising agent, in aqueous solution at a temperature of between -50 DEG and +50 DEG C, and then the reaction mixture is heated until hydrolysis of the intermediat...

PURPOSE:To obtain a buffer laminate material using paper without holes by forming a convex on a thermoplastic synthetic resin sheet at a part corresponding to a molding concave provided on a mold. CONSTITUTION:A laminate body 4 is transferred to a heating tunnel 15 being held at bulged sections leaving a gap (a) therebetween. The laminate body 4 proceeding into the heating tunnel 15 is heated with...

In the production of non-adherent coated paper substrate by applying to the substrate a solvent-containing mixture comprising (A) 100 parts by weight of an alpha , omega -dihydroxypolydimethylsiloxane having a viscosity between 105 and 5. 107 cP at 20 DEG C., (B) about 1 to 20 parts by weight of a polyorganosiloxane which is terminally blocked with trimethylsiloxy groups, contains Si-bonded hydr...

A process is provided for preparing skinless liquophilic alcohol-insoluble polyamide membranes by preparing at a first temperature a solution in a polyamide solvent having a temperature coefficient of solubility within the range from about 0.01 to about 5 weight per cent per degree Centrigrade of on alcohol-insoluble polyamide resin having a ratio CH2:NHCO of methylene CH2 to amide NHCO groups wit...

PURPOSE:To facilitate the joining of two synthetic resin materials without the lowering of the strength thereof by a method wherein a laser light irradiates the upper one of the laminated synthetic resin materials from ahead and behind to heat and melt and a compressed gas is blown to the melt by the rear laser light to be forced into a groove formed continuously through both of the synthetic resi...

PURPOSE:To facilitate the joining of two synthetic resin materials without the lowering of the strength thereof by irradiating the upper one of the two laminated synthetic resin materials slantly from above with a laser light to heat and melt so that a compressed gas is blown against the melt to run into an inclined groove made through both of the synthetic resin materials. CONSTITUTION:A YAG lase...

PURPOSE:To form a synthetic resin multi-layer tube with a high productivity by fixing an inner tube material at a specified position in an outer tube material with a synthetic resin material while meshing parts of the outer tube material are fitted together to connect. CONSTITUTION:An outer tube material 10 which has meshing parts 10a and 10b to be fitted together on edges made when cut off along ...

Tubular filter elements are provided having an improved side seam seal which can be bonded to end caps in a leak-tight manner and can be formed of a thermoplastic material which is the same plastic material as the end caps and/or of the filter elements, improving the bonding of the side seam seal to the end caps and filter elements.

A laminated tube adapted to be used as the body of a collapsible dispensing container includes an inner layer 14 of an epoxy resin, an intermediate layer 12 of aluminium a foil and an outer layer 26 of thermoplastic material. The tube is made by forming a foil and epoxy resin laminate into tubular form having longitudinally extending circumferentially overlapped edges 16 and 18 with a bead of plas...

A self-priming pressure-sensitive adhesive bonding tape is provided having a layer of a primary pressure-sensitive adhesive material coated onto one or more surfaces with a film of a secondary pressure-sensitive adhesive material. Both the primary and secondary pressure-sensitive adhesives are modified by the addition of adhesion promoters to enhance the wetting characteristics of the tape. The fi...

The invention relates to an electrically heated vehicle seat which, in addition to a conventional electrical heating device, is also provided with an additional electrical heating element (119) which is designed to heat up strongly a small part of the seat directly after being switched on. In order to prevent damage as a result of overheating, a circuit (26, 36, 42) is designed to switch off the f...

A device for guiding a strip so that it is kept in a predetermined lateral position as the strip moves from a supply to a take up reel. The device includes mechanical sensors sensing the lateral edges of the strip, the sensors being coupled by a differential linkage system to a frame in which is mounted a pair of rollers, one each side of the strip and in contact therewith. The frame is pivoted ab...

In a door (10) with a decorator plate (13) for a domestic appliance, preferably a dish-washing machine, the door (10) is pivotally supported at its lower end and provided with a control panel (16) at its upper end. When the door is closed the decorator plate (13) and the panel (16) form an approximately continuous front surface of the door. The decorator plate (13) is pivotally supported in points...

A snap-fit fastening system for use in attaching a member to an electric motor utilizes stator through-bolts with specially formed heads and the member includes a plurality of slots formed in a pattern similar to the pattern in which the through-bolt holes of the stator laminates are arranged, but with the slots extending radially relative to the central axis of the stator and being offset lateral...

A seating platform e.g. for domestic furniture or motor vehicle seats comprises at least one moulded elastic element mounted on a frame member and covered by a non-stretch sheet which, upon installation, is only lightly tensioned. The elastic element is of a substantially incompressible material, e.g. a rubber composition high in natural rubber, and includes spaced apart grooves which permit contr...

A catheter with an inflation cuff, is produced by a method in which an inflation cuff of an elastomeric material which is not thermoplastic is placed on a catheter shaft of thermoplastic material at a desired position. Pressure is directed inwardly around the entire periphery of at least each end of the cuff. The shaft is heated sufficiently to soften it so as to enable at least the ends of the cu...

An apparatus for continuous curing (vulcanization) of elongated products, such as cables comprising a conductor surrounded by a mantle of a crosslinkable material. The apparatus comprises a curing tube through which the cable is passed longitudinally. The curing tube comprises a heating zone in which the cable is subjected to heating for heating the cable to curing temperature in a pressurized gas...