Abstract: A medical electrode and skin preparation device is adapted to be secured to the skin of a patient and is designed to prepare the skin by abrasion or penetration of the epidermal layer of the skin in contact with the conductive means of the electrode after the electrode is secured in place on the skin. The electrode includes a penetrating device associated with a conductor capable of transmitting biopotential events for recording, with the conductor being retained by an adhesive member which secures the electrode to the skin of the patient. The penetration device in contact with the skin is movable relative to the skin of the patient and a holder by an applicator gun to abrade or penetrate the epidermal layer of skin after the electrode is placed on the skin. Uniform skin preparation is achieved by a flexible screen member and an electrolyte gel reservoir on the electrode and an applicator gun which minimizes motion artifacts arising from skin potential variations.

Abstract: A diffusion printer for creating indicia in the top of the keys (67) of a keyboard, such as a computer keyboard (69), is disclosed. The diffusion printer includes a hot stamp press (11) that has a heated, vertically movable platen (15) positioned above a table (13). Mounted on the table is a double tray shuttle (23) whose trays (27) are alternately shuttled between loading positions and a print position located between the platen and the table. Each tray (27) supports a plurality of fixtures (51) each formed to receive a keyboard (69) that includes a plurality of keys (67) to receive indicia. Each fixture (51) includes a fixture base (53) having a plurality of spring loaded pedestals (65). The pedestals are positioned such that a pedestal (65) lies beneath each of the keys (67) to receive indicia. The keys (67) are maintained in a fixed position by a key cap locator plate (55) mounted atop the fixture base (53). The key cap locator plate (55) also functions as a heat shield.