Patent ID: 9139337
Filing Date: 2015-09-22
Classification: B65D

Abstract:
1. A round trip envelope having an opening for inserting materials to be mailed into an envelope body and having a sealing flap folded at a position of the opening so as to seal the envelope body, wherein the envelope body has a front face on which at least an outgoing stamp affixing area and an outgoing address writing area are provided, and a back face on which at least a return stamp affixing area and a return address writing area are provided, an adhesive area for adhering the sealing flap to the back face of the envelope body is provided in one or both of a blank area on the back face in a vicinity of the opening and a blank area on the sealing flap corresponding to the blank area on the back face, and a distal end portion of the sealing flap extending beyond the adhesive area constitutes a return-mail sealing flap which is re-folded from the back face onto the front face when sending return mail, and wherein a distal end portion of the sealing flap extending beyond the adhesive area has a back face at least a part of which is temporarily adhered to the back face of the envelope body by a portion of the adhesive area in such a way as to be releasable and not re-adherable.