An automated typesetting system is disclosed for use in the production of commercially-printed products, such as engraved, embossed, or lithographed letterhead, envelopes, business cards, and the like. The seat assembly includes a seat and mechanism for connecting the seat to the base support frame in a manner enabling multi-directional resistive movement of the seat relative to the base support frame. The pH neutralization agent can be calcium carbonate, the acid can be citric acid and the effervescent agent can be sodium bicarbonate. A receiver address is identified by decrypting the encrypted gatekeeper header data according to a gatekeeper decrypting key.