| 摘要 |
PURPOSE: To enable a package to be sealingly closed again, i.e., closed again by a complete mechanical means after a package is opened and a part of the content is removed from the package by a method wherein both grooves and ridges are formed at plastic side walls of a tray, an opening upper part of the tray is covered by a cover, i.e., a lid. CONSTITUTION: A plurality of grooves 22, 24 are projected out in a radial direction outside side walls 20, the side walls are provided with a vertical stability. A strain caused by a load in a vertical direction is made minimum when a lid is closed and when filled containers are stuck in a vertical direction one by one. Flanges 30 are flexed downwardly with a pressure applied from ridges 42. A sheet 46 covers an upper part 26 of an opening of the tray and at the same time it is completely sealingly closed around a circumferential edge of the upper part 26. Some fixed beads, i.e., the ridges 42 pull down a flat surface 32 of the lid to be in contact with a sealing sheet 46 and further it is in contact with the items contained in the tray. |
