METHOD OF FOLDING AND SHAPING SHEET, AND APPARATUS FOR FOLDING AND SHAPING SHEET

WIPO Patent Application WO/1997/043200

A1

A method of folding and shaping a sheet, by which a sheet formed with a single or a plurality of mountain-shaped folds and a single or a plurality of valley-shaped folds, the first and second folds being parallel and alternate, can be rapidly and smoothly folded and shaped, and an apparatus therefor. The method comprises the steps of supplying a sheet (1) in a naturally developed state onto a support guide (3), and applying a light pressing pressure on the sheet (1) in a direction, in which folds (10, 11) are increased in bent angles, by means of a pressing guide (6), which acts in a direction of moving toward and away from a support surface of the support guide (3) when a pair of bending tools (5a, 5b) begin to apply bending pressures on the sheet (1) or are in the course of applying bending pressures on the sheet (1) while applying bending pressures on the sheet (1) in a direction, in which the sheet (1) is bent along the respective folds (10, 11). The sheet (1) can be correctly and smoothly folded and shaped along the respective folds (10, 11).

WO/2004/085150	AN ENCAPSULATED STRUCTURAL ARTICLE
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WO/1992/009500	LOW-DENSITY SHAPED-SECTION ELEMENT MADE OF CORRUGATED MATERIAL

YAMAMOTO MASAHIRO (JP)
YOKOYAMA YOSHIMASA (JP)

PCT/JP1997/001552

November 20, 1997

May 08, 1997

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HITACHI SHIPBUILDING ENG CO (JP)
YOKOYAMA SANKOH CO LTD (JP)
YAMAMOTO MASAHIRO (JP)
YOKOYAMA YOSHIMASA (JP)

B31D3/00; B31F1/00; B65H45/101; B31F1/08; B65H45/30; (IPC1-7): B65H45/30; B65H45/101; B31D3/00

JPH04292375A	1992-10-16
JPH04294135A	1992-10-19

See also references of EP 0908409A4

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