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This patent uses torque transfer pins that are manufactured from memory metal. The purpose of this is to reduce wear and breakage of the torque transfer mechanism in the seal. In the event of excessive torque, such as during startup, the memory metal can withstand the additional superelastic strain, from which it will subsequently recover. Wear or breakage of the drive pins is therefore reduced compared to a seal with conventional pins.
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A heat-sealable seal for the mouth of a vessel is described. It includes a substrate made of an expanded polyester layer, connected by adhesive to a lid that includes an aluminium foil and a heat-sealable film. The aluminium foil and the film are connected by a binder.
T es ting laser welded f or the manufacture seals of aseptic food containers Keyhole laser welding of polymers is a subject well covered and researched, but relatively little information exists regarding the welding of thin polymer films, particularly to a heavier substrate. Researchers at the Mecha