Pocket fold invitations have flaps holding the parts of the total invitation. Resembling the old-fashioned wrapper and message combination, they open flat, holding a separate invitation in the center loosely and a side compartment holding response and return envelopes. Actually you can make it yourself.
Take the imprinted invitation, which can be done by computer and use it as a guide to create a pattern for a pocket fold invitations. Measure the invitation and design a pattern to include a cover flap, two side flaps and a bottom RSVP holder flap plus 1 inch to fold to hold the RSVP inserts. This is a general guide.
Cut out the pocket fold invitation. Fold the flaps in to go around the imprinted invitation as well as the two-part fold on the bottom of the invitation to hold the RSVP inserts. Secure both sides of the bottom 1-inch flap that holds the RSVP inserts with glue.
Insert the RSVP inserts in the bottom fold. Fold the bottom flap up, close side flaps in over the imprinted invitation and then close the cover flap down.
Insert the packet into a larger envelope, address and mail. Be sure there is sufficient postage according to postal service rates.
The cover flaps of the pocket invitations can be sealed instead of inserting into a larger envelope if desired, then addressed and mailed.