Dynamic information storage or retrieval – Specific detail of information handling portion of system – Electrical modification or sensing of storage medium
Patent
1990-08-20
1993-02-02
Wolff, John H.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Electrical modification or sensing of storage medium
346 76PH, 346155, 219216, G01D 1506, B41J 320, B41J 300
Patent
active
051843447
ABSTRACT:
A recording head having an electrically insulating substrate (11), at least one recording electrode (12) formed on one of opposite major surfaces of the substrate, and at least one return circuit electrode (13) formed on the other major surface. The substrate is formed of a material whose wear resistance is lower than that of the electrodes, and includes a proximal portion, and a thin-walled distal end portion (16) extending from the proximal portion for contact with an electrically resistive layer of a recording medium or an ink ribbon. The distal end portion has a constant thickness smaller than that of the proximal portion, and the substrate has a recessed portion formed in at least one of the opposite major surfaces such that the recessed portion at least partially defines the thickness of the distal end portion. A reinforcing layer (17) is disposed to reinforce the thin-walled distal end portion, such that at least a portion of the reinforcing layer is positioned in said recessed portion.
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Hirota Toshikazu
Okada Shigeki
Shimogawa Natsumi
Takeuchi Yukihisa
NGK Insulators Ltd.
Rhoa Joseph A.
Wolff John H.
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