Apparatus for the stacking and connection of synthetic-resin foi

Details Apparatus for the stacking and connection of synthetic-resin foi Apparatus for the stacking and connection of synthetic-resin foi

1980-06-13

1982-08-03

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

156563, 493204, B31B 2314

Patent

active

043425640

ABSTRACT:
A flattened tube of synthetic resin is heat-sealed along a leading edge and a multiplicity of perforations are punched along an arcuate line spaced from and convex towards the sealed tube end. The tube is subsequently conveyed to a stacking station where a fusing area defined by the perforations is thermally bonded to a similar area of an underlying bag. The tube is transversely cut along a base line of the fusing area. In an apparatus implementing the method at least one perforator is shiftably mounted on a carriage upstream of the stacking station for positional adjustment parallel to and perpendicular to the direction of tube transport. A needle bar at the stacking station has several threaded bores for receiving one or more heating plugs energizing respective mandrels which traverse a lower and an upper clamping bar during an upward shift of the needle bar to pierce the plastic tube at respective fusing areas. Each bore in the needle bar is flanked by a pair of parallel needles. Also disposed at the stacking station are a pair of welding bars for forming the heat-sealed transverse seam in each bag, a cutting blade for successively severing bags from the tube and further clamping bars.

REFERENCES:
patent: 2973797 (1961-03-01), Sylvester
patent: 3729361 (1973-04-01), Westlake, Jr.
patent: 3966524 (1976-06-01), Lehmacher
patent: 4128049 (1978-12-01), Lehmacher
patent: 4181069 (1980-01-01), Porter
patent: 4270908 (1981-06-01), Lehmacher

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