Abstract 1. In an apparatus for continuously sealing the longitudinal edges of a strip of heat-weldable material to the corresponding longitudinal edges of two contiguous plies of heat-weldable material as said strip and said plies are drawn continuously along a sealing path; a first heat sealing station; means for supplying and strip to said first heat sealing station; means for aligning a first edge of said strip with said first heat sealing station; means for aligning the edge of only one of said plies with said first heat sealing station; means for continuously feeding said strip and said one of said plies through and first heat sealing station; means for guiding the other of said plies away from said one of said plies to bypass said first heat sealing station; a second heat sealing station located along said path and spaced from said first heat sealing station; means for guiding said two plies and said strip along said sealing path from said first heat sealing station to said second heat sealing station; means for aligning the second edge of said strip with said second heat sealing station; means for aligning the edge of the other of said plies with said second heat sealing station; and means for continuously feeding said strip and said other of said plies through said second heat sealing station, whereby said strip and said plies are continuously drawn along said path first through said first heat sealing station and subsequently through said second heat sealing station for sealing said strip first to said one of said plies and subsequently to said other of said plies.
In an apparatus for continuously sealing the longitudinal edges of a strip of heat-weldable material to the corresponding longitudinal edges of two contiguous plies of heat-weldable material as said strip and said plies are drawn continuously along a sealing path; a first heat sealing station; means for supplying and strip to said first heat sealing station; means for aligning a first edge of said strip with said first heat sealing station; means for aligning the edge of only one of said plies with said first heat sealing station; means for continuously feeding said strip and said one of said plies through and first heat sealing station; means for guiding the other of said plies away from said one of said plies to bypass said first heat sealing station; a second heat sealing station located along said path and spaced from said first heat sealing station; means for guiding said two plies and said strip along said sealing path from said first heat sealing station to said second heat sealing station; means for aligning the second edge of said strip with said second heat sealing station; means for aligning the edge of the other of said plies with said second heat sealing station; and means for continuously feeding said strip and said other of said plies through said second heat sealing station, whereby said strip and said plies are continuously drawn along said path first through said first heat sealing station and subsequently through said second heat sealing station for sealing said strip first to said one of said plies and subsequently to said other of said plies.
Claim 2
Dependent Claim
267 words
In an apparatus for continuously sealing the longitudinal edges of a strip of heat-weldable material to the corresponding longitudinal edges of two contiguous plies of heat-weldable material as said strip and said plies are drawn continuously along a sealing path; a first heat sealing station; means for supplying and strip to said first heat sealing station; means for aligning a first edge of said strip with said first heat sealing station; means for aligning the edge of only one of said plies with said first heat sealing station; means for continuously feeding said strip and said one of said plies through and first heat sealing station; means for guiding the other of said plies away from said one of said plies to bypass said first heat sealing station; a second heat sealing station located along said path and spaced from said first heat sealing station; means for guiding said two plies and said strip along said sealing path from said first heat sealing station to said second heat sealing station; means for aligning the second edge of said strip with said second heat sealing station; means for aligning the edge of the other of said plies with said second heat sealing station; and means for continuously feeding said strip and said other of said plies through said second heat sealing station, whereby said strip and said plies are continuously drawn along said path first through said first heat sealing station and subsequently through said second heat sealing station for sealing said strip first to said one of said plies and subsequently to said other of said plies.