Appeal No. 96-3465
Application No. 07/848,856
15. A method of longitudinally sealing a bag comprising the
steps of:
a) providing an elongated mandrel having a longitudinally
extending ridge, said mandrel having an indentation extending
along said ridge;
b) wrapping a sheet of material having interwoven
filaments around said mandrel such that opposite edges of said
sheet of material overlap one another at said ridge forming an
outer material layer overlying said ridge and an inner material
layer overlying said indentation;
c) pressing inwardly on said sheet of material over said
indentation to flex the edge of said outer material layer
outwardly creating a gap between said outer material layer and
inner material layer;
d) inserting a heating element in said gap;
e) pressing said overlapping edges onto said heating
element to melt said edges;
f) removing said heating element;
g) pressing said overlapping melted edges together to
cause said edges to seal to each other.
The references relied upon by the examiner are:
DeWoskin 4,157,719 June 12, 1979
Tumminia 4,396,449 Aug. 2, 1983
Colombo et al. (Colombo) 4,464,219 Aug. 7, 1984
Young et al. (Young) 4,502,906 Mar. 5, 1985
The following rejections are at issue in this appeal:
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