Apparatus for making plastic carrier bags

Details Apparatus for making plastic carrier bags Apparatus for making plastic carrier bags

1984-10-02

1986-08-12

Husar, Francis S.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493372, 493926, 83428, B31B 2386, B26D 106

Patent

active

046053921

ABSTRACT:
In an apparatus for making plastics carrier bags from a web of tubular film of thermoplastic material, a feeding mechanism intermittently conveys the webs by one bag width and a severing mechanism cuts the web into half tubes along an undulating curve. A carriage displaceable in the machine frame transversely to the feeding direction of the web is reciprocated by a drive derived from a first rotating control cam through gearing. A cutting knife pivotable in the carriage about its longitudinal axis passes through the plane of the tube about an axis perpendicular thereto and is so controlled by an oscillating drive derived from a second rotating control cam that its edge is substantially tangential to the undulating curve at the cutting point. A detour assembly retards one of the half tubes to bring the bag side edge zones into phase and each half tube is formed into bags by a transverse sever-sealing device.

REFERENCES:
patent: 204145 (1978-05-01), Ford et al.
patent: 1127448 (1915-02-01), Jullien
patent: 2942529 (1960-06-01), Piazze
patent: 3282525 (1966-11-01), Rehr
patent: 4365051 (1983-01-01), Lehmacher
patent: 4398903 (1983-08-01), Lehmacher

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