Machine for manufacturing a tubular element

Details Machine for manufacturing a tubular element Machine for manufacturing a tubular element

1979-11-06

1981-12-29

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Tube making

Polygonal cross section tube

493176, 493303, 493457, B31B 144

Patent

active

043080235

ABSTRACT:
A process and machine for manufacturing a tubular element, for example for use in forming boxes, in which a strip of material is wound around a mandrel having a cross-section corresponding to that of the tubular element to be formed. The strip of material is arranged to extend in a plane and the mandrel is applied against the strip in a direction perpendicular to said plane to cause lateral parts of the strip to lift up on either side of the mandrel and to define two flaps projecting above the mandrel. A force is then exerted on each of the flaps in a direction parallel to said plane to fold the flaps down onto the mandrel and to bring their free edges into abutment.

REFERENCES:
patent: 755754 (1904-03-01), Day et al.
patent: 2075679 (1937-03-01), Weber
patent: 3018702 (1962-01-01), Bauder
patent: 3476022 (1969-11-01), Scully
patent: 3589097 (1971-06-01), Gianese

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