Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With bending – folding – winding – or wrapping means
Patent
1989-06-13
1990-05-29
Simmons, David
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With bending, folding, winding, or wrapping means
156497, 53373, B65B 5120
Patent
active
049292994
ABSTRACT:
A sealing device with multiple differential action is provided for machines producing dual-use filter sachets for infusion products. In such machines a continuously moving strip of thermally weldable filter paper, fed with equidistantly spaced fractional doses of the infusion product, is progressively folded longitudinally into a flattened tubular shape with adjacent folded-back longitudinal edges forming a longitudinal crest. The device is constituted by two blocks having respective pairs of mirror-image stepped overlapping edges extending to the opposite sides of the adjacent folded back edges of the strip forming the longitudinal crest. The mirror-image edges of the upper overlap have bores connected to a fluid-dynamic heat source. The mirror-image edges of the lower step have a lamellar structure.
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patent: 3720565 (1973-03-01), Cavanna
patent: 4249364 (1981-02-01), Kawasaki et al.
patent: 4696147 (1987-09-01), Noh
Cestind - Centro Studi Industriali-S.R.L.
Dubno Herbert
Simmons David
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