Abstract: A method and system are provided for performing vend operations on articles selected by a purchaser. Articles to be dispensed are stored in a storage section, and purchased articles are transferred from the storage section to a vend section. A vend mechanism is provided for rapidly moving a given article from a vend-destined section to the vend section. A helical transfer member holds the articles in the storage section and is rotatable in a dispensing direction to transfer the given article from a position adjacent the vend-destined section to the vend-destined section. The helical transfer member is also rotatable in a reverse direction opposite the dispensing direction. A driver is coupled to each helical transfer member, and is actuable to rotate the helical transfer member in either the dispensing direction or the reverse direction.

Abstract: In a packaged article vending machine having a forwardly, projecting motorized helix supported on a horizontally arranged tray in a wide column delimited by side walls which are disposed substantially further apart than the helix is broad in diameter, the helix is prevented from `walking` towards the sidewall towards which it would tend to move as the helix rotates, by securing a chock to the tray so as to tangentially engage at least two turns of the helix during a portion of a 360.degree. rotation of the helix, from externally of the helix, and have its rear end located sufficiently out of the way as to avoid possibly poking contact with from the front lower part of an impounded product package being conveyed forwards to eventually become the leading package, next to be vended.

Abstract: The mounting channel for product price, product identity and/or column identity chips or cards provided across the front of a tray of a glass-front vending machine of the motorized helical mechanism type, is provided with one or more chips or cards which have a tab which protrudes upwards beyond the product support surface of the tray, at a location determined to be appropriate for intersecting a like corner of each package conveyed to the foremost position and off the front edge of that tray, for thereby predetermining the spatial orientation of the package as it begins to fall, for preventing bridging of the package between the tray and the glass front. The tabbed chip or card may also provide typical product price, product identity and/or column identity information.