METHOD FOR SEALING A METAL CANS WITH PEELABLE LIDS AND DEVICE THEREFOR

摘要

A method of sealing a peelable lid (2) to a flange (4) provided within a metal can body (1) which involves inserting an induction coil (6) into the can body to primarily heat the sealing surface (5) of the flange, whilst keeping the exterior wall of the can relatively cool to avoid tin reflow and decoration degradation of the exterior wall. The induction coil is subsequently removed from the can body and a peelable lid applied to the flange, whereby residual heat in the flange aids the sealing of the lid to the flange, e.g. by allowing activation of a bonding material.

主权项

1. A method of sealing a peelable lid to an inwardly projecting and circumferentially extending flange of a metal can body, the method comprising:
a) inserting an induction coil into the can body; b) passing an alternating current through the coil to heat the flange; c) removing the induction coil from the can body; and d) applying the peelable lid to the flange, whereby residual heat in the flange seals or aids the sealing of the peelable lid to the flange.