US 11,814,231 B2
Steam-releasing pouch
Takahiro Shimono, Tokyo (JP)
Assigned to TOPPAN PRINTING CO., LTD., Tokyo (JP)
Filed by TOPPAN PRINTING CO., LTD., Tokyo (JP)
Filed on Aug. 25, 2021, as Appl. No. 17/412,020.
Application 17/412,020 is a continuation of application No. 16/598,993, filed on Oct. 10, 2019, granted, now 11,124,344.
Application 16/598,993 is a continuation of application No. PCT/JP2018/015280, filed on Apr. 11, 2018.
Claims priority of application No. 2017-079042 (JP), filed on Apr. 12, 2017.
Prior Publication US 2021/0380322 A1, Dec. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B65D 77/22 (2006.01); B65D 81/34 (2006.01)
CPC B65D 77/225 (2013.01) [B65D 81/3461 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A steam-releasing pouch comprising:
two laminated sheets forming an accommodation compartment that accommodates a content;
a sealing portion that seals the two laminated sheets to form an opening that opens part of the accommodation compartment; and
a steam-releasing sealing portion formed in the sealing portion to open as pressure of the accommodation compartment increases in a state in which the opening is sealed, wherein
the steam-releasing sealing portion includes a first sealant layer having at least a first base layer that faces the accommodation compartment and a second base layer laminated with the first base layer and a second sealant layer having at least a third base layer that faces the accommodation compartment and a fourth base layer laminated with the third base layer,
the first base layer and the third base layer are joined together,
the steam-releasing sealing portion is arranged in a projection, which is formed by folding one of the two laminated sheets,
the projection includes a folding line that extends along a peak of the projection,
the steam-releasing sealing portion includes a first sealing portion, a second sealing portion, a third sealing portion, a fourth sealing portion, a fifth sealing portion, a sixth sealing portion, and a seventh sealing portion,
the first sealing portion is arranged on one edge of the steam-releasing pouch in a widthwise direction, and continuous with the folding line,
the second sealing portion is continuous with the first sealing portion and the third sealing portion, and extends in parallel with the folding line,
the third sealing portion is inclined toward the folding line from a one side toward the other side of the steam-releasing pouch in the widthwise direction, and not continuous with the folding line,
the fourth sealing portion is continuous with the third sealing portion, recessed away from the folding line, and not continuous with the folding line,
the fifth sealing portion is continuous with the fourth sealing portion, inclined away from the folding line from the one side toward the other side of the steam-releasing pouch in the widthwise direction, and not continuous with the folding line,
the sixth sealing portion is continuous with the fifth sealing portion and the seventh sealing portion, and extends in parallel with the folding line,
the seventh sealing portion is arranged on the other edge of the steam-releasing pouch in the widthwise direction, and continuous with the folding line,
slits are arranged in corresponding positions along the second sealing portion and the sixth sealing portion, respectively, in the widthwise direction,
the second sealing portion is recessed from the third sealing portion in a direction away from the folding line so as to accommodate a corresponding one of the slits, and
the sixth sealing portion is recessed in the direction from the fifth sealing portion away from the folding line so as to accommodate a corresponding another one of the slits.