Appeal No. 2002-1086
Application 09/297,065
packaging method consists of a rather complicated and extended
series of steps schematically illustrated in Figures 3-5B. Of
particular interest are the end panel manipulations which are
summarized by Silver as follows:
the end of the carton is first temporarily closed by
folding in the form of the laminated board as uncut
scored panels including web-gussets and having a fin
extension composed entirely of the laminated board,
then by applying heat to the end panels the inner
sheeting is heat-sealed and released from the board
support which is thereby unfolded whereafter the
stripped portions of the board support are refolded.
Preferably the stripped portions of the board support
are severed before being refolded to form flaps which
may be adhered to each other in the conventional
manner. As is well known in the art, a web-gusset is
formed by folding triangular-shaped flaps which are
usually jointed to each other.
Preferably, the first temporary closing is done by
outfolding, then by applying the heat the wax is melted on
the outer folds while the inner sheeting is being heat-
sealed, and then the board support which is thereby stripped
from at least a portion of each of the web-gussets is opened
away from the stripped and sealed inner sheeting. The
stripped board support is then preferably cut to form
rectangular flaps which are then folded down again in the
conventional manner and stuck together.
Preferably, the heat applied to the first temporarily
closed end of the carton should be insufficient to strip the
inner sheeting of the undermost part of the web-gussets
because this has the advantage that when the end is finally
closed the inner sheeting will be better held in position
[column 1, lines 17 through 42].
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