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公开(公告)号：US11338535B2
公开(公告)日：2022-05-24
申请号：US16302775
申请日：2017-10-12
发明人： Kazuya Akita , Makoto Shimohatsubo
摘要： A sheet folding device and method, and a box-making machine, wherein are provided a molding belt for moving on a center side in the width direction of a cardboard sheet toward a downstream side in a transfer direction of the cardboard sheet and thereby pressing and folding both end parts in the width direction of the cardboard sheet from the outside, and a folding roller group formed by folding rollers for contacting insides of fold parts on both sides in the width direction of the cardboard sheet more toward the center in the width direction of the cardboard sheet than the molding belt, the folding rollers being arranged further upstream in the transfer direction of the cardboard sheet than a 90-degree folding position of the cardboard sheet.
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公开(公告)号：US11602915B2
公开(公告)日：2023-03-14
申请号：US16626933
申请日：2017-09-27
发明人： Kazuya Akita , Shinya Iori , Makoto Shimohatsubo
摘要： A sheet folding device includes forming belts which are disposed on both sides in a transfer direction of a corrugated board and move to a center side in a width direction of the corrugated board toward a downstream side in the transfer direction to press both end portions in the width direction from an outside so as to bend both the end portions; and a gauge roller group including several gauge rollers which are disposed along the transfer direction and come into contact with outer sides of both bent portions in the width direction of the corrugated board bent by the forming belts. In the several gauge rollers, recessed portions are provided on outer peripheral surfaces of the gauge rollers in a circumferential direction. Positions of the recessed portions are disposed to be offset downward in a vertical direction toward a downstream side in the transfer direction.
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