Browse Prior Art Database

Rotating Work Holder

IP.com Disclosure Number: IPCOM000096876D
Original Publication Date: 1962-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Chapman, EB: AUTHOR [+2]

Abstract

The device is used for etching of printed circuits containing fine and closely spaced lines. The holder insures a uniform etching with less undercutting.

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Rotating Work Holder

The device is used for etching of printed circuits containing fine and closely spaced lines. The holder insures a uniform etching with less undercutting.

Frame 10 carries a disc 11 rotatably mounted on three grooved wheels 12. One face of the disc is provided with L-shaped vanes forming pockets 14. The other face is unobstructed to accommodate the work to be etched. The work is fastened to the disc with tape, melted wax or clamps. The frame and disc are of chemically inert material.

Frame 10 is positioned in tank 15 having nozzles 16 which traverse up and down on guides 17. They spray etchant over both faces of the disc. As pockets 14 fill, they overbalance the disc causing it to rotate. This carries the work in a rotary path insuring an even distribution of the etchant.

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