Patent ID: 6109992
Filing Date: 2000-08-29
Classification: B03B,B09B,H01J,Y02W

Abstract:
Method for the detaching of metallic bases from glass bodies for recycling thereof, said method, comprising:a first step of bringing at least one of said metallic bases to be detached into an effective zone of an induction field coil whereby the coil body of said induction field coil is positioned substantially concentric in relation to said at least one metallic base;a second step of inducing electric current flow through at least one said induction field coils in order to generate a magnetic field such that the metallic base is arranged inside the magnetic field and is heated so that the metallic base thermally expands thereby loosening the joint between the metallic base and the glass body;a third step of separating the metallic base and the glass body from one another so that the metallic base and the glass body can remain in substantially intact condition and, such that any glass bodies which contain poisonous heavy metals, will retain said poisonous heavy metals in such a way that said poisonous heavy metals cannot react with any base-materials of said metallic base,said glass body has a base with a diameter smaller than a diameter of the glass body, said glass body being clamped by holders and hold-downs and the base of which is concentrically surrounded by said induction field coil and is heated until the joint between the bases is loosened by thermal expansion;wherein said step of separating said metallic base away from the said glass body in the substantially intact condition is accomplished by a gripping and pulling device, andwherein the glass body has at least one end base at each respective end and is transported in an essentially horizontal position such that both bases are substantially concentric with said induction field coils and that the at least one end base at each respective end are pulled away simultaneously from the glass body after loosening of the bases.