Appeal No. 1998-2035
Application 08/458,783
paperboard container with a wiping contact with said rim.
Claim 12 sets forth a method of lubricating and
curling a rim of a paperboard container using apparatus
similar to claim 1, wherein said method includes the steps of
effecting relative advancing movement between the housing
block (14) having a curl-forming channel (16a) and a rim of a
paperboard container, saturating with a liquid lubricant
annular porous liquid transfer ring (22) formed of a felt or
open-celled foam material which partially extends over the
curl-forming channel (16a), bringing the rim of the paperboard
container into wiping contact with the annular liquid transfer
ring (22) saturated with the liquid lubricant and bringing the
lubricated rim of the paperboard container into contact with
the curl-forming channel (16a) to cause the lubricated
paperboard container rim to be curled thereby.
The examiner (answer, pages 3-4) is of the view that
Ruza discloses an apparatus for curling edges of paper cups,
said apparatus having a housing block (11), an annular curling
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