Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE8302841Aexternal-prioritypatent/SE454433B/en
Application filed by Akerlund & Rausing Licens AbfiledCriticalAkerlund & Rausing Licens Ab
Application grantedgrantedCritical
Publication of ATE29008T1publicationCriticalpatent/ATE29008T1/en
Welding appts. for plastic box base - has system of two split spreader rings and induction welding tool to press and weld positioned base against interior end of hollow body
Welding appts. for plastic box base - has system of two split spreader rings and induction welding tool to press and weld positioned base against interior end of hollow body