Process and apparatus for folding a sheet longitudinally and tra

Details Process and apparatus for folding a sheet longitudinally and tra Process and apparatus for folding a sheet longitudinally and tra

1984-06-01

1986-02-18

Husar, Francis S.

Manufacturing container or tube from paper; or other manufacturi

Bending

Folding

198774, 493437, 493448, 493451, A31F 100

Patent

active

045712379

ABSTRACT:
A process and a device for folding a sheet longitudinally and transversely, in which the lower folds and the upper folds of a plurality of pairs of longitudinal folds of a Leporello fold are formed in sequence by fold straight edges that are movable towards each other, the front edges of the fold straight edges being moved along an arcuate path to the sheet in order that there is contact between them and the sheet only at the end of said movement. The longitudinally folded sheet is then laid on the parallel contact edges of the transverse fold plates that are arranged at intervals adjacent to each other, and pressed together therebetween, the areas between the transverse fold plates being pressed downwards by pressure elements which are moved upwards and out once again prior to the completion of the movement of the transverse fold plates towards each other. Thus it is possible to form all the transverse folds in one stage of the process.

REFERENCES:
patent: 1313712 (1915-12-01), MacFarland
patent: 1892496 (1932-12-01), Willard
patent: 2890044 (1959-06-01), Wisdom
patent: 3143363 (1964-08-01), Falk
patent: 3605981 (1971-09-01), Danieli
patent: 3632103 (1972-01-01), Nikitits
patent: 4227684 (1980-10-01), Brocklehurst

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