Method and apparatus for joining together edge surfaces of polytetrafluoroethylene material by a butt joint in which clamps along the abutting surfaces press together the abutting surfaces, heating means spaced from and out of direct contact with a strip between the clamps heats the strip by radiation...http://www.google.es/patents/US4197149?utm_source=gb-gplus-sharePatente US4197149 - Method for joining together shaped bodies of polytetrafluoroethylene
Method for joining together shaped bodies of polytetrafluoroethylene
