IMPROVEMENTS RELATING TO THE MANUFACTURE OF TOILETS

摘要

A bowl unit or a holding tank for a portable toilet is formed from first and second mouldings (28, 30) in a thermoplastic material which are adapted to fit together in a joint plane to form an enclosure. The mouldings define respectively a continuous channel (64) and a continuous tongue (66) capable of being received in the channel for forming a joint between the mouldings. A sealing strip (68) which is substantially co-extensive with the channel and comprises a thermoplastic material capable of fusing with the material from which the mouldings are formed and having magnetically excitable particles dispersed therein, is positioned in the channel and the mouldings are assembled with the tongue engaged in the channel of the other. The sealing strip is then subjected to a high-frequency magnetic field to an extent sufficient to cause the strip to fuse with the channel and tongue and form a liquid-tight seal between the mouldings.