Substrate storage container

Abstract

A substrate storage container includes: a container body molded of molding material in a front open box type for storing substrates; a door element fitted to an opening at the front of the container body; and a compressively deformable gasket for sealing between the container body and the door element. The opening of the container body is projected sidewards and outwards forming a rim portion. A sealing surface for the gasket is formed on an inner surface of the rim portion. The container body is formed with a reinforcing rib directed toward the rim portion. An opposing portion of the reinforcing rib that opposes the rim portion of the container body is reduced in thickness so as to prevent a depression from forming in the sealing surface of the rim portion during molding the container body.

1 - 8 . (canceled) 
     
     
         9 . A substrate storage container comprising:
 a container body molded of molding material in a front open box type for storing substrates;   a door element fitted to an opening at the front of the container body; and   a compressively deformable gasket for sealing between the container body and the door element;   wherein the opening of the container body is projected sidewards and outwards forming a rim portion,   a sealing surface for the gasket is formed on an inner surface of the rim portion,   the container body is formed with a reinforcing rib directed toward the rim portion, and   an opposing portion of the reinforcing rib that opposes the rim portion of the container body is reduced in thickness so as to prevent a depression from forming in the sealing surface of the rim portion during molding the container body.   
     
     
         10 . The substrate storage container according to  claim 9 , wherein the opposing portion of the reinforcing rib is formed to be discontinuous to the rim portion of the container body so as to reduce the thickness of the opposing portion of the reinforcing rib. 
     
     
         11 . The substrate storage container according to  claim 9 , wherein the opposing portion of the reinforcing rib is joined continuously to the rim portion of the container body, and a through hole is formed in the opposing portion of the reinforcing rib so as to reduce the thickness of the opposing portion of the reinforcing rib. 
     
     
         12 . The substrate storage container according to  claim 9 , wherein the opposing portion of the reinforcing ribs joined continuously to the rim portion of the container body, and the opposing portion of the reinforcing rib is reduced in thickness so that the thickness of the opposing portion of the reinforcing rib is less than two-thirds or less of a thickness of a proximal portion. 
     
     
         13 . The substrate storage container according to  claim 9 , wherein a plurality of reinforcing ribs directed in a front-to-rear direction of the container body is formed in a bottom surface of the container body and a front part of the each reinforcing rib is formed to be the opposing portion. 
     
     
         14 . The substrate storage container according to  claim 9 , wherein bottom rails for transportation are formed on both sides at a bottom of the container body by means of reinforcing ribs, and a front part of each reinforcing rib is formed to be the opposing portion.