Title:
METHOD OF MANUFACTURING PACKAGING SHEET, METHOD OF MANUFACTURING RAW MATERIAL FOR PACKAGING SHEET, AND FOOD PACKAGING BAG
Document Type and Number:
WIPO Patent Application WO/2020/170483
Kind Code:
A1
Abstract:
In order to improve the mass productivity of a packaging sheet including an unsealing means in which one end 5a of an unsealing strip 5 protrudes to form an unsealing grip piece, a method of manufacturing a packaging sheet according to the present invention comprises: a step in which a separation piece 33 that forms an opening when bent and opened is formed by forming a score line 32 on a sheet 3; a step in which while the unsealing strip 5 is arranged such that a portion inside the one end 5a of the unsealing strip 5 overlaps with the separation piece 33, the unsealing strip 5 is bonded to one surface of the sheet 3 in a predetermined range from the separation piece 33 to the other end side of the unsealing strip 5; and a step in which by applying an external force to the separation piece 33, the one end 5a of the unsealing strip 5 moves to the other surface side of the sheet 3 via the opening formed by the separation piece 33 to protrude from the score line 32 to the other surface side of the sheet 3.
Inventors:
KAMIYA TOMOKI (JP)
Application Number:
PCT/JP2019/034900
Publication Date:
August 27, 2020
Filing Date:
September 05, 2019
Export Citation:
Assignee:
HOWA SANGYO CO LTD (JP)
International Classes:
B31B70/81; B65D30/28; B65D33/00; B65D75/62; B65D85/50
Foreign References:
| JP3072028U | 2000-09-29 | |||
| JPH07256797A | 1995-10-09 | |||
| JPS54106396A | 1979-08-21 |
Attorney, Agent or Firm:
YAKUMARU, Seiichi (JP)
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