Apparatus for pulling tube ends open to form base squares of cro

Details Apparatus for pulling tube ends open to form base squares of cro Apparatus for pulling tube ends open to form base squares of cro

1982-11-02

1985-01-15

Simmons, David

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493259, B31B 152

Patent

active

044936869

ABSTRACT:
In apparatus for pulling tube ends open to form base squares in the production of large cross-bottom sacks, table plates are disposed parallel to the plane of the pulled open bases and separated from another by a gap through which a tubular web is feedable in a plane substantially perpendicular to the table plates. Suckers at both sides of the web pull the edges of the web end apart. The suckers are secured to carriages which are movable in parallel guides from a position in which they are pushed together to the pulled open position of the base.

REFERENCES:
patent: 1165765 (1915-12-01), Duvall
patent: 3250187 (1966-05-01), Kasting
patent: 4371367 (1983-02-01), Achelpohl et al.

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