Appeal No. 1998-2484 Page 8 Application No. 08/212,819 holes. Therefore, as shown in Fig. 3, a ring of liquid gasket is formed outside the O ring, preventing water from entering the flange, which in turn prevents the corrosion of the flange. The air-tight sealing is examined prior to filling the liquid gasket, so this examination becomes more reliable. The removed bolt can be inserted and tightened after filling the liquid gasket. If the hole 9 is used, the hole is plugged. If the liquid gasket material is a rubber vulcanized at a normal temperature, it will be cured in a few days after having been filled, so the plugging will not be necessary. Groove 8 may be made in both flanges 4 and 8, and the same effect will be produced by it. Fig. 4 shows a variant form of the present invention. When insulating spacer 12 is installed between the flanges, the width of the groove 8 is made larger than the diameter of the buried metal element 13 to prevent the corrosion of buried metal element 13 by making the front face of the buried metal element tightly contact with the liquid gasket 6. In the embodiment example of Fig. 4, the corrosion of the buried metal element is prevented as well as that of the flange. Notwithstanding the appellants statement to the contrary (brief, page 7), that JP’313 does not disclose a liquid packing, we note that appellants’ specification (page 1), in a description of JP’313 sets forthPage: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NextLast modified: November 3, 2007