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US 11,198,282 B2Granted
Method for manufacturing packaging sheet
AssigneesSegyero Co., Ltd., Ho Chil Kim
InventorHo Chil Kim
Life of this patent
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Abstract
The present invention relates to a method of manufacturing a packaging sheet, the method being capable of not only greatly improve a heat insulation property of the packaging sheet, but also minimizing the volume of cells of the packaging sheet without opening the cells by partially cutting or needle-punching the cells, thereby facilitating storage and transportation of the packaging sheet.
Claims7
A method of manufacturing a packaging sheet, the method comprising:
- a) manufacturing a formed film in which a plurality of cells are formed at a regular interval;
- b) bonding a lower-side film having one end that extends further than one end of the formed film to a lower side of the formed film such that the plurality of cells of the formed film are open;
- c) temporarily filling a fluid into the plurality of the cells of the formed film;
- d) closing the plurality of cells of the formed film;
- and
- e) bonding an upper-side film onto the plurality of the cells,
- wherein in the step d), the plurality of cells are temporarily closed when the plurality of cells passes through an apron conveyor in a state in which the fluid is temporarily filled in the plurality of cells, the apron conveyor compressing one side or another side of the respective cell or compressing both of the one side and the another side of the respective cell, and
- wherein the apron conveyor compresses the one side or the another side of a respective cell inwardly of the respective cell or compressing both of the one side and the another side of the respective cell inwardly of the respective cell.
5 more elements
Dependencies are inferred from the claim text.