Method and apparatus for producing a collapsibly foldable packag

Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With bending – folding – winding – or wrapping means

Patent

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Details

Other Related Categories

493 22, 493288, 493295, 493302, 493311, B31F 100

Type

Patent

Status

active

Patent number

042604460

Description

ABSTRACT:
The present invention provides a method and an apparatus for producing a packaging sleeve of polygonal cross-section, particularly adapted to be foldably collapsed, wherein circular or tubular sleeve stock is formed on a stationary spindle or mandrel from a plurality of glued, thin layers of paper, fabric, plastic material or the like, wound or wrapped one over the other. The sleeve is thereafter shaped into a polygonal cross-section. During the shaping of the tubular packaging sleeve while it is in the glue-wetted state, at least one continuous folding edge impressed into the sleeve wall and extending in the longitudinal direction of said sleeve is press-formed at the desired longitudinally extending edge corners of the polygonal cross-section. The sleeve, wrapped to a final wall thickness after the winding or wrapping operation, is subjected, in the form of individual, separated sections or lengths, to a shaping operation to form a polygonal cross-section at a separate rate of feed, simultaneously with the formation of the folding edges.

REFERENCES:
patent: 1319455 (1919-10-01), Bartlett
patent: 2998339 (1961-08-01), Barnes et al.
patent: 3202066 (1965-08-01), Palmer
patent: 3256783 (1966-06-01), Richter
patent: 3610115 (1971-10-01), Rose et al.
patent: 3619863 (1971-11-01), Ciabani
patent: 3732790 (1973-05-01), Miyake et al.
patent: 3910171 (1975-10-01), Reinhardt et al.

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