Abstract: A container such as a beer keg includes a container body 1 and top and bottom chimes 2, 3. The container body has a peripheral side wall 10 provided with a plurality of circumferentially-spaced projections which are formed with the container body by a simple pressing or moulding operation. Each chime is formed with a peripheral skirt 23 which fits over the peripheral side wall and a co-operating inner lip which snap-engages over the circumferentially-spaced projections. In a plastics container, the contents of the container tend to press against the projections and resist any tendency to distortion in normal use and therefore increase the strength of the attachment. In the case of the top chime 2 the skirt 23 is joined to an inner hub 21 which is additionally fixed to the container neck 12 by means of a valve assembly 4 which is screwed onto the neck. A cap 6 prevents unscrewing of the valve assembly 4 and provides immediate evidence of tampering.

Abstract: A fully recyclable valve housing adapted for engagement with a neck of a container such as a beer keg, has an inner port 25 for liquid and a concentric outer port 14 for pressurised gas, with openings 21 for admitting pressurised gas into the container. A dip tube 5 is connected to a bottom end fitting 4, communicating with a valve stem 8 within the valve housing. A valve member 6 is arranged to control flow through the concentric ports, and a spring element 7 located about the valve stem 8 urges the valve member upwards to close the ports. The spring element 7 is moulded from a resilient polymeric material and comprises a plurality of C-shaped sections 7a angularly arranged in two interconnected stacks on opposite sides of the valve stem such that movement of the valve member 6 by means of a valve-operating member causes concurrent resilient deformation of all the sections.

Abstract: A system for analyzing the content of a gas, characterised by comprising means for drawing off the gas developed during article moulding; means for feeding the drawn-off gas to a gas chromatograph.

Abstract: This analyzer for extracting acetaldehyde and automatically determining its content, particularly in PET preform samples, comprises in combination: a) a desorption cell (1) into which said sample is inserted; b) an analysis chamber with a separation column (16) optimized for acetaldehyde separation; c) a complex of valves for manipulating the fluids within the system; d) a detection system; e) data processing and control means; f) a temperature-controlled casing housing the aforesaid components.