envelope below the insertion location there is provided a moistener wick 60 held within a container 62 of moistening agent 62 a the moistener wick is located so that during a sealing operation it will moisten the gum portion of an envelope flap to thereby seal the envelope when the flap is closed against the envelope main body formed mail pieces are fed out of the mail piece creation device 1 by feeding them along feed path 46 for ejection out of the mail piece ejection opening 13 under the influence of mail piece ejection roller pair 13 a more detailed description of the operation of mail piece creation device 1 will now be given with reference to fig4 10 as shown in fig4 an envelope e has a main body m and a flap f joined to one another along a hinge h the envelope is loaded on the envelope feed tray 5 either singly or in a stack with the flap end at the trailing edge as shown in fig4 the envelope is fed by separator roller 18 into the mail piece creation device 1 into the envelope insertion opening 17 with the flap in the closed position i e folded at hinge h.