公开(公告)号：US09938056B2

公开(公告)日：2018-04-10

申请号：US15074729

申请日：2016-03-18

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Kazuhiko Inaba ,  Shunsuke Yajima

IPC: B65D51/16

CPC classification number: B65D51/1666 ,  B65D51/1638 ,  B65D77/2036 ,  B65D77/2064

Abstract: A package has a seal portion that includes steam passage portions for externally releasing steam from inside the tray. The steam passage portion has an inner edge in which the portions configuring one side and the other side relative to the tip are curved and extended nearing each other toward the tip. The steam passage portion has an outer edge in a curved shape with a pointed tip, the shape being similar to that of the inner edge. The steam passage portion has a merging portion located between the tip of the outer edge and the tip of the inner edge, and a non-merging portion located between the merging portion and a common portion. The non-merging portion has a width narrowed from the common portion toward the merging portion.