Flap

Flap

There are three types of flaps on an envelope – Side, Bottom and Seal. The Side flaps are the tabs that are folded and gummed to form the envelope pocket. The Bottom flap is the protion of the envelope that folds up and is sealed along the sides edges to the side flaps to form the pocket. The Seal flap is the flap that is folded down and sealed after inserting contents. Seal flaps may have remoistenable, latex or peel and stick adhesive closures. Seal flaps may be square, pointed or tapered. Standard flap styles such as Commercial, Square, Pointed and Wallet are specified depending on the envelope’s intended use. Commercial flaps are designed to be compatible with automatic inserting and sealing machines. Square and Pointed flaps are used in social correspondence, invitations and greeting card envelopes. Wallet flaps’ extended length and over-sized gum pattern are used to seal securely and enclose thick multi-page contents.

Flap

 

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