Capital City Products LLC

Portable Thermoplastic Welding Machine

Patent No.:   US 4,913,772                                     Date of Patent: April 3, 1990

This invention relates to portable machines for welding together individual thermoplastic sheets in situ.  The machine heats different and opposing thermoplastic sheets using independently controlled electric, radiant heat sources and then compresses the sheets beneath an endless compression belt to complete the weld thus forming a unitary membrane.