Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
Burdick, RL: AUTHOR [+3]
AbstractDrilled circuit panels can be ejected from a vacuum chuck without damage by employing air-operated pistons to lift the panel from locating pins.
Drilled circuit panels can be ejected from a vacuum chuck without damage by employing air-operated pistons to lift the panel from locating pins.
Referring to the figure, circuit panel 1 is positioned by one or more locating pins 2 during drilling on a vacuum chuck 3. When the panel 1 is to be removed, air under pressure is supplied to manifold 4 and along channel 5 in chuck 3 above bed 6 to raise piston 7 having O-ring seal 8. Piston rod 9 rises to lift panel 1 to the position shown in phantom 1' and the piston 7 compresses spring 10 against upper plate 11. After the panel 1 has been lifted from chuck 3, air pressure is relieved through a valve (not shown) and spring 10 returns piston 7 to its seated position with the aid of bleed vent 12 in plate 11.
This piston arrangement requires minimum height H and uses a side air manifold 4 so that no air openings in bed 6 are required.