Device for welding together the ends of tubular plastic containers, notably tubes
Patent 6476345 Issued on November 5, 2002. Estimated Expiration Date: July 11, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
A device for welding the ends of a tubular container made from plastic, in particular tubes has a holding device which holds the container in a stationary fashion with its open end facing in an upward direction and including means for warming a ring shaped peripheral region of the container proximate the opening to facilitate subsequent welding along an elongated seam travelling transverse to the longitudinal extension of the container. A mounting holds a plurality of diode lasers in an approximately circular manner such that their radiation is incident on the inner or outer wall of the container, either directly or via a deflection optics.