Appeal 2007-0512
Application 10/310,744
7. Hubbard Figure 7 is reproduced here:
8. Hubbard describes the apparatus as follows: "[a]ttached to the chassis
22 is the hot air welder 200 [sic: 20] The hot air welder 20 includes a
heating element for heating air and a blower for blowing the heated air to a
nozzle 40 for selective distribution . . . ." (Hubbard at col. 5, ll. 53–66.)
9. Hubbard describes two distinct embodiments of weld wheels, one of
which is shown in Figure 7, and a second, in which the middle, stipled
portion, is absent:
The roof membrane welding apparatus 10 may also include at
least two weld wheels 62 and 64 or a weld wheel 63 made of a
duo-durometer material having a soft middle material and a
hard outer material. The duo-durom[e]ter material may be a
urethane, silicone or a foam material and the like, having a
Shore A hardness of about 50 or more for hard outer material
and of about 40 or less for the soft middle material. It will be
appreciated that the weld wheels 62 and 64 or weld wheel 63
must allow the roof membrane fasteners to pass between the
weld wheels or underneath the weld wheel and allow the weld
wheels to simultaneously press the first membrane 12 and the
-7-
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: September 9, 2013