Abstract: A mounting device is provided for attaching promotional displays, dispensers, or other objects to a shelf in a grocery or other retail store shelf. The mounting device has resilient first and second jaws that are forced into engagement with the shelf by a locking slide. In one preferred embodiment, first jaw and second jaw are oriented at slightly less a 90.degree. angle relative to the body of the mounting device. The body has a vertical slot into which a rack attached to the second jaw slides and a horizontal channel into which a locking slide is inserted to cooperate with the rack. The rack has teeth which mesh with cooperating teeth on a locking slide to move the jaws together. In addition, the body has, for example a price channel, to which an advertising or promotional display device such as a shelftalker, or other object can be mounted.

Abstract: An adapter device is provided for varying the length of a ball point pen refill cartridge to enable the cartridge to be used in a variety of ball point pen housings. The adapter consists of a barrel which slips over the distal end of a refill cartridge and is securely connected to the cartridge by a channel formed in the barrel. The barrel comprises detachable sections which are removed as necessary so that the cartridge with the adapter attached barrel sections is substantially equal in length to the exhausted refill cartridge. The channel permits air to flow to the ink cartridge, enabling ink to be flow easily from the cartridge.