and 381 of extension member 315 with this arrangement a tight seal can be established without seal to seal contact and only one seal member i e gasket 305 having to engage the opposing door i e door 53 based on this construction the particular structure and arrangement of gaskets 305 and 335 themselves provide for enhanced seal life in particular door linkage system 200 of the present invention overcomes an issue of slop in the mechanism by intentionally moving one of doors 52 and 53 farther than the other of doors 52 and 53 when doors are first opened for example instead of doors 52 and 53 opening evenly door 52 initially moves significantly farther than door 53 breaking contact between gasket 305 and a mating portion or extension member 315 of door 53 in the most preferred form of the invention the oven cavity 6 cabinet shell 4 as well as extension member 315 is provided with a porcelain coating with this construction each of gaskets 305 335 is only seated against porcelain coated surfaces to minimize wear caused by surface roughness as discussed above annular gasket 305 or more particularly gasket side member 357 does not make contact with the side not separately labeled of door 53 instead the gasket.