Patent ID: 8003043

Claim:
A method for providing access to the interior of a metal melt furnace comprising: creating an opening in a sidewall of a metal melt furnace; placing a water cooled enclosure in the opening such that the enclosure substantially occupies the opening and a rear surface of the enclosure is substantially flush with the interior wall of the furnace; wherein the water cooled enclosure further comprises: a first port, disposed along a first axis and terminating at a furnace aperture, for providing access to the interior of the metal melt furnace; a second port, disposed along a second axis that is not coaxial with the first axis, and terminating at the furnace aperture; a furnace aperture plug, with a first end and a second end and disposed in the second port, for insertion into the furnace aperture; and a furnace aperture plug reciprocator for reciprocating the furnace aperture plug along the second axis.