Patent ID: 9738434
Date: 2017-08-22
CPC Classifications: A47K,B65D

Claim:
1. A sheet storage box, wherein: the sheet storage box is for storing sheets that are folded in a parallel or substantially parallel direction, the direction defining an average sheet fold line; and an open space is formed on a surface of the sheet storage box as a sheet-removing opening defined by a rim for removing sheets, the rim of the sheet-removing opening consisting of: wherein: a line segment that connects the first corner portion and the third corner portion defines a first line segment; a line segment that connects the second corner portion and the fourth corner portion defines a second line segment; an intersection of the first line segment and the second line segment defines a center of the sheet-removing opening; a line that is parallel or substantially parallel to the average sheet fold line and that passes through the center of the sheet-removing opening defines a third line segment; the second corner portion is a concave shape curve projecting towards the outside of the sheet-removing opening from the center of the sheet-removing opening; the fourth corner portion is a concave shape curve projecting towards the outside of the sheet-removing opening from the center of the sheet-removing opening; the first rim region is a convex shape curve projecting towards the second line segment, the convex shape curve defining a shape and a size of the first rim region; the second rim region is a convex shape curve projecting towards the second line segment, the convex shape curve defining a shape and a size of the second rim region; the third rim region is a convex shape curve projecting towards the second line segment, the convex shape curve defining a shape and a size of the third rim region; the fourth rim region is a convex shape curve projecting towards the second line segment, the convex shape curve defining a shape and a size of the fourth rim region; the shape of the first rim region and the shape of the third rim region are point-symmetric with each other with respect to the center of the sheet-removing opening; the shape of the second rim region and the shape of the fourth rim region are point-symmetric with each other with respect to the center of the sheet-removing opening; the closest distance between the first rim region and the second line segment defines a first rim region distance; the closest distance between the second rim region and the second line segment defines a second rim region distance; the closest distance between the third rim region and the second line segment defines a third rim region distance; the closest distance between the fourth rim region and the second line segment defines a fourth rim region distance; the first rim region distance and the third rim region distance are the same or substantially the same as each other; the second rim region distance and the fourth rim region distance are the same or substantially the same as each other; the position of the first corner portion and the position of the third corner portion are point-symmetric with each other with respect to the center of the sheet-removing opening; the first corner portion consists of two convex shape curves, both of which project towards the second line segment, the two convex shape curves defining first corner portion sizes; the third corner portion consists of two convex shape curves, both of which project towards the second line segment, the two convex shape curves defining third corner portion sizes; each of the first corner portion sizes is smaller than the size of the first rim region and the size of the fourth rim region; each of the third corner portion sizes is smaller than the size of the second rim region and the size of the third rim region; the shape of the entire sheet-removing opening is not line-symmetric with respect to the third line segment; and the shape of the entire sheet-removing opening is point-symmetric or substantially point-symmetric with respect to the center of the sheet-removing opening.