Appeal No. 1997-3029
Application 08/416,526
accordingly. Claim 1 is reproduced below as illustrative
of the invention.
1. A device for being fixedly secured in a machine to
ultrasonically seal together two plastic layers along a long
and narrow sealing joint, comprising a cylindrically shaped
drive unit for being connected to an A.C. current source to
generate an oscillation, a horn which oscillates during
operation of the drive unit and which has one end at which is
mounted the drive unit and an opposite end, the opposite end
of the horn having a long and narrow end surface which defines
a sealing surface for producing a long and narrow sealing
joint during operation of the drive unit, and at least one
reaction body mounted at the one end of the horn for
assimilating counter forces created during oscillation of the
horn to produce a nodal plane located below the drive unit,
the at least one reaction body and the horn together defining
a length of the device which is half a wave length.
The references relied on by the Examiner are:
McMaster et al. (McMaster) 3,368,085 Feb. 6, 1968
Shoh 3,524,085 Aug. 11, 1970
Mishiro 4,483,571 Nov. 20, 1984
Elbert et al. (Elbert) 4,607,185 Aug. 19, 1986
Wuchinich 5,057,182 Oct. 15, 1991
Claims 1 to 11 and 13 to 18 stand rejected under 35
U.S.C.
§ 103 over Wuchinich or Elbert or Mishiro in view of either
Shoh or McMaster.
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