Abstract: An electronic real estate lockbox system includes a number of operational features, including facsimile reporting capability, bilateral locking solenoids, improved shackle latching capabilities, improved key-compartment release operation, two-wire bilateral lock-key communications, improved case design, viral lockout list propagation, an update code grace period, packet formatted data transmission with error recovery, FSK audio data downloading, and high security challenge-response authorization procedures. A variety of other operational features are also disclosed.

Abstract: An air conveyor for bottles and bottle preforms wherein bottles are preferably conveyed while supported from a neck ring intermediate neck and body portions of the bottle by air jets directed at the neck portion of the bottle from a plenum chamber defining a conveying path. The conveyor includes depending side curtains in close proximity to the sides of the bottles as an aid to conveyance. As a further aid to conveyance through inclined portions of the conveying path, the conveyor is provided with bottom plate joining the bottom edges of the side curtains.