Method and apparatus for making a continuous series of filled pouches
Assignee3M Innovative Properties Company
InventorsCraig E. Hamer, John F. Macklin, Gary W. Schukar, Jeffery N. Jackson, Neil J. Schwartzbauer
Life of this patent
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Abstract
A machine for forming filled sealed pouches from a continuously moving sealable web of material includes a first sealing station for forming a longitudinal seal along a side edge of the web, and a horizontal sealing station for forming a plurality of transverse seals in the web. The horizontal sealing station includes a pair of conveyors each carrying jaws that mate along a sealing path to form the transverse seals. A method of forming filled sealed pouches from a continuously moving sealable web of material is also described.
Claims7
A method of producing a pressure sensitive adhesive, comprising the steps of:
- (a) providing a continuously moving, unsupported, elongate, thermoplastic, heat sealable web, the web including opposed sheets each having first and second side edges;
- (b) longitudinally sealing the web along at least one side edge, thereby forming an elongate tube with sealed side edges;
- (c) providing first and second jaw carrying members defining a sealing path therebetween, the jaw carrying members including a plurality of cooperating pairs of mating jaws traveling at substantially the same velocity as the web along the sealing path, wherein at least one of the jaw carrying members comprises a flexible non-circular conveyor;
- (d) forming a first transverse seal in the web as the web travels along the sealing path by clamping the web between a pair of mating jaws and bonding the sheets by heating the web, thereby forming a partially formed pouch having sealed side edges, a sealed bottom, and an open top;
- (e) filling the partially formed pouch with a polymerizable liquid monomer mixture;
- (f) forming a second transverse seal in the web as the web travels along the sealing path by clamping the web between a pair of mating jaws and bonding the sheets by heating the web, thereby scaling the top of the partially formed pouch;
- (g) polymerizing the liquid monomer mixture;
- and
- (h) blending the polymerized liquid with the web material, thereby to form the pressure sensitive adhesive.
Dependencies are inferred from the claim text.