Appeal No. 96-2680
Application No. 08/258,788
tie means for securing said upper mesh layer and said lower
mesh layer together and holding said insulating layer in
position; and
at least one ferromagnetic plate, whereby each said
ferromagnetic plate provides a lift point for lifting said
insulating cover.
The examiner relies upon the following references as
evidence of obviousness:
Schnabel 982,883 Jan. 31, 1911
Evans et al. (Evans) 1,466,823 Sep. 4, 1923
Grant et al. (Grant) 4,424,957 Jan. 10, 1984
Appellants' claimed invention is directed to an insulating
cover for the opening in a torpedo car, as well as methods for
forming and installing the insulating cover. Torpedo cars, or
ladle cars, are used for carrying molten metal. The insulating
cover of the present invention comprises an insulating layer
positioned between upper and lower mesh layers and at least one
ferromagnetic plate. The ferromagnetic plate enables the
insulating cover to be lifted by an electromagnet.
Appealed claims 1-19 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Grant in view of either Schnabel or Evans.
We have thoroughly reviewed the respective positions
advanced by appellants and the examiner. In so doing, we find
ourselves in agreement with appellants that the prior art applied
by the examiner fails to establish a prima facie case of
-2-
Page: Previous 1 2 3 4 5 Next
Last modified: November 3, 2007