Equipment for folding paper webs and the like

Details Equipment for folding paper webs and the like Equipment for folding paper webs and the like

1987-07-27

1990-07-03

Terrell, William

Manufacturing container or tube from paper; or other manufacturi

Bending

Folding

493423, 493451, 493941, B65H 4504, B65H 4510

Patent

active

049387391

ABSTRACT:
An apparatus for folding a sheet along concentric circular arcs comprises two series of chain driven comb-shaped folding elements. The folding elements of each series are spaced apart by a distance which is approximately twice the distance between the intended fold locations on the sheet, with the elements of one series being arranged to act against one side of the sheet and the elements of the other series being arranged to act against the other side of the sheet. The folding elements of one series are offset relative to those of the other series a distance equalling the distance between adjacent fold locations on the sheet. The elements of one series increasingly overlap the elements of the other series along the length of the sheet, whereby a plurality of folds are simultaneously being formed progressively as the sheet is fed between the two series of folding elements.

REFERENCES:
patent: 1313712 (1919-08-01), MacFarland
patent: 2072790 (1937-03-01), Apitzsch et al.
patent: 2709950 (1955-06-01), Foster et al.
patent: 2901951 (1959-09-01), Hochfeld
patent: 2984160 (1961-05-01), Whelton et al.
patent: 3138077 (1964-06-01), Bauder et al.
patent: 3348458 (1967-10-01), Tipper
patent: 4012932 (1977-03-01), Gewiss
patent: 4571237 (1986-02-01), Vogtlander
patent: 4659323 (1987-04-01), Ito et al.
patent: 4718884 (1988-01-01), Iwase et al.

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