Manufacturing container or tube from paper; or other manufacturi – Bending – Folding
Patent
1982-01-18
1983-12-20
Heinz, A. J.
Manufacturing container or tube from paper; or other manufacturi
Bending
Folding
493456, B65H 4522
Patent
active
044215010
ABSTRACT:
Apparatus for use in folding web material includes a plow folder supported intermediate transverse entrance and exit rollers and cooperative therewith to effect longitudinal folding of the web as it moves longitudinally through the apparatus. In a preferred embodiment, the plow folder includes at least one rotatable cylindrical web engaging roller and a fold forming member coaxial with the web engaging roller and having a partial cylindrical outer peripheral surface and an axially outwardly facing fold surface subtending an acute angle with the longitudinal axis of the fold forming member. Air orifices are formed in the outer peripheral surface of the fold forming member to facilitate air lubrication between the fold forming member and the moving web. The plow folder is adjustable vertically and laterally to facilitate different fold widths, and the fold forming member is selectively rotatably adjustable about its longitudinal axis to optimize folding of different type web materials without forming wrinkles or gussets at the fold line and without marking the web. The plow folder is supported on a support frame which enables substantially 180.degree. pivotal movement of the plow folder between upwardly and downwardly directed positions relative to the main frame for upward and downward folding. A fold holding roller is mounted to extend transversely of the folded web and is adjustable to selectively vary the pressure applied against the folded web to prevent unfolding.
REFERENCES:
patent: 1625178 (1927-04-01), Wheildon
patent: 2023734 (1935-12-01), Lamatsch
patent: 3216720 (1965-11-01), Sano
patent: 3655500 (1972-04-01), Johnson
patent: 3799536 (1974-03-01), Gregoire
patent: 4047711 (1977-09-01), Gregoire
patent: 4231560 (1980-11-01), Stohlquist
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