Recorders – Electric recording – Electrochemical
Patent
1987-08-19
1988-08-23
Evans, Arthur G.
Recorders
Electric recording
Electrochemical
346155, G01D 1500
Patent
active
047664487
ABSTRACT:
Methods and apparatus for forming an electrostatic printhead. The basic printhead member if formed by casting an insulating material around a plurality of side-by-side spaced wires. One side of the insulating material and the wires are cut off to form a printhead face. The other side of the insulating material and the wires are cut off to form an attachment face with the wire ends exposed. A printed circuit board having electrical contacts along the edge is positioned adjacent the exposed wire ends of the attachment face and the wire ends are wire bonded to the contacts. In one embodiment, there are two printed circuit boards positioned on either side of the attachment face and then folded together following the wire bonding. In another embodiment, the attachment face is formed as ledges having the exposed ends of the wires cut as rectangular pads for more area of attachment and the insulating material is attached to the edge of a single printed circuit board. The preferred automated apparatus for doing the wire bonding includes testing apparatus for testing each wire bond and for re-bonding bad joints before moving on to the next wire end/contact pair to be bonded.
REFERENCES:
patent: 4415403 (1983-11-01), Bakewell
Beegan David T.
Hack James R.
Masson Bernard V.
Evans Arthur G.
Porter, Jr. Wm. F.
Sanders Associates Inc.
Streck Donald A.
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