Envelope for e.g. ballot, has pre-cut notch that is half-moon shape and provided at upper part of simple paper sheet, where envelope is closed by folding sheet into two, while coupling folded part under notch

摘要

The envelope has a pre-cut notch that is half-moon shape and provided at an upper part of a simple paper sheet. The envelope is closed by folding the sheet into two, while coupling the folded part under the notch. The sheet has an adhesive surface.