Appeal No. 1998-1658 Application 08/343,876 magnetic flux density material on the leading gap edge as recited in claims 1 and 8. Accordingly, the rejection of claims 7 and 14 is reversed. Issue (3): Claims 1, 4-6, 8, and 11-13 Shimizu '178 and Shimizu '645 The contents of Shimizu '178 are discussed under Issue (1). Shimizu '645, figure 1, discloses a MIG head having magnetic core halves 11a and 11b of Mn-Zn ferrite with first ferromagnetic metal thin films 13a and 13b of high saturation flux density material, such as Fe-Si-AD, on the core halves opposing each other to form the gap 12 and second ferromagnetic metal thin films 17a and 17b, such as Fe-Si-A D alloy of different composition, on the first ferromagnetic metal thin films 13a and 13b (col. 4, lines 20-44). The first ferromagnetic metal thin film may be sendust (col. 8, lines 49-53). The ratio B S2/BS1 of the saturation flux density B S2 of the second ferromagnetic thin films 17a and 17b to the saturation flux density B S1 of the first ferromagnetic metal thin films 13a and 13b should be less than 0.6 (col. 2, lines 59-61; col. 5, lines 16-26 and 45-48; col. 7, lines 10-18). Shimizu '645 discloses that the first and second ferromagnetic metal thin films 13a and 17a may be formed on only one magnetic core half 11a, as shown in figure 8 (col. 8, lines 16-21). Shimizu '645 does not disclose the direction of - 9 -Page: Previous 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NextLast modified: November 3, 2007