Pouch with superposed tear lines
AssigneeHosokawa Yoko Co., Ltd.
InventorsShigeyuki Ohsima, Yoshiji Moteki
Life of this patent
Estimating the term…
Abstract
A pouch formed of a laminate sheet for containing therein a content such as retort food. Both lateral sides of front and rear walls of the pouch are heat sealed with each other, and top opening is also heat sealed together to sealingly maintain the content. The laminate sheet has at least two heat sealable plastic layers at an inner side of the pouch. At at least one of the heat sealable plastic layers, a surface roughened zones are provided at both front and wear walls. The zones are superposed together and extend along a tearing direction staring from a notch formed at one side heat sealed portion.
Claims8
A pouch for containing a product, said pouch including a rectangular front wall and a rectangular rear wall having a shape identical with said front wall, at least three heat sealed sections including a first side seam (4) sealing together confronting side edges of said front and rear walls, a second side seam (5) sealing together opposite confronting side edges of said front and rear walls, and a top seam (7) sealing together confronting top edges of said front and rear walls, wherein:
- said front and rear walls are formed of a laminate sheet comprising a plastic film layer (15), a product blockage layer (14) formed over said plastic film layer, and an aluminum foil (12), one of said plastic film layer and said product blockage layer being bonded to said aluminum foil;
- said first side seam is formed with a notch (8);
- and
- said plastic film layer of said front and rear walls is formed with first and second surface roughened zones (9) each extending from said first side seam to said second side seam in parallel with said top seam, one end of each of said surface roughened zones being in alignment with said notch, and said first and second surface roughened zones being superposed with each other.
Dependencies are inferred from the claim text.