LETTER ENVELOPE Russian patent published in 2000 - IPC

FIELD: packing facilities. SUBSTANCE: envelope has face and rear walls formed by halves of folded sheet. Face wall of envelope has side and upper flaps. Upper flap has end bent inside along width of glue layer. The second layer of glue required for repeated use of envelope is applied on internal surface of rear wall external side of the latter. Two side flaps are coated with glue from external side and stuck to internal surface of rear wall by means of narrow strip along sides of rear wall at places of side flap bending. Rear wall of envelope has no flaps. EFFECT: convenient opening of envelope. 5 dwg