Envelope for letters with adhesive closure as well as their production process and dispositivn.para.

摘要

About for letters comprising a closure flap (14) joined to an envelope front (12) and a fold-back flap (18) which can be folded upward from a storage state to a closed state, which in the storage state it is folded against the back of the envelope (16), with adhesive closure by means of a contact adhesive layer (23¿) in the stored state on a separation zone formed by a surface region the back of the envelope, and being able to paste the fold-back flap (18) with the closure flap (14) in the closed state, characterized in that the contact adhesive layer (23¿), the surface of a pressure sensitive adhesive area (23) on the fold-back flap (18) and the separation zone (22) are configured such that they cooperate so that the contact adhesive layer (23¿¿) applied to the separation zone (22) is limited in effect with respect to the adhesive area is parison so that during production of the envelope for cards is applied and adheres to the separation zone (22) with its bonding to the separation zone (22) removable lower side, but the adhesion between the pressure sensitive adhesive area (23 ) of the fold-back flap (18) and contact adhesive layer (23¿¿) is so large that the contact adhesive layer (23¿¿) adheres on the upper side on the area of ​​the contact adhesive layer (23) pressed on the upper side, so that the underside of the contact adhesive layer (23¿¿) that after folding up the fold-back flap form the surface of the contact adhesive layer (23¿¿) It presents the adhesive to close by folding down the closure flap onto the adhesive layer contact characteristics.