Appeal No. 95-4119
Application 08/155,877
As to the Wuerfel patent, in particular, it addresses
a method of making annular springs with alternating reversed
helical formations thereon (Figure 4) and appears to us to be
suggestive of replacing an integral series of opposed projections
12, 13 with structure simply placed on (secured to) the discs 6
and 7. With the Wuerfel method of making springs (page 2,
lines 27 through 48), the discs of the apparatus clamp or distort
spring blanks which are then subjected to suitable temperature
for a sufficient length of time to permit setting of the rings in
the distorted condition or shape. After cooling, the discs are
removed and the rings are then in the distorted shape or
condition shown in Figure 4. Once again, plural pressing steps
are not suggested.
The device used in the manufacturing process of Oil
(translation, page 5) for making wavy ring springs effects
deforming of the work pieces 25, but after such deformation the
upper plate 4 of the device is raised and the bent work pieces
are removed, ostensibly as the final product. Thus, it is clear
to us that the process of Oil is not suggestive of plural
pressing steps, as claimed.
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