Voltaic cell container sealing apparatus has anvil plate with guides and springs for sonotrode

An apparatus, designed to produce a gas- and liquid-proof seal for a voltaic cell container using ultrasound welding for the plastic layers of the container components, has an anvil plate (2) that supports the components to be joined, positioned opposite the sonotrode (4) and centered relative to it. The apparatus, designed to produce a gas- and liquid-proof seal for a voltaic cell container using ultrasound welding for the plastic layers of the container components, has an anvil plate (2) that supports the components to be joined, positioned opposite the sonotrode (4) and centered relative to it. The anvil plate is equipped with guides (6), springs (5) and a centering ball (3), and its upper surface is fitted with an insulating plate (10) of a ceramic material, attached to it by a thin layer of adhesive. It also has centering pegs (8) for a centering plate (7). Dispositif pour sceller le boîtier d'éléments galvaniques d'une manière étanche aux gaz et aux liquides, ces éléments ayant la forme de piles minces. Le soudage se fait aux ultrasons pour des couches de matière plastique constituant les parties de boîtier. Le dispositif comporte une plaque formant enclume (2) servant d'appui aux pièces à réunir. Cette plaque est située en regard de la sonotrode (4) servant au soudage à ultrasons. La plaque (2) est montée de manière centrée par rapport à la sonotrode (4) et son bord comporte des moyens de guidage (6) et des ressorts (5). Le montage centré se compose d'un appui sphérique (3) et la surface de la plaque formant enclume (2) comporte une matière isolante, en particulier une plaque de céramique (10).