CASSETTE FOR LIQUID MACHINING OF PRINTED CIRCUIT BOARDS Russian patent published in 1994 - IPC

FIELD: electronics. SUBSTANCE: invention relates to machining equipment meant for machining of units on printed circuit boards in baths. In accord with process upper board 1 is attached to central support 6 and lower board 2 is joined to inner bushing 8 which is put on support 6 and is fixed on it with the aid of balls 9 buried in recessions 10 and outer bushing 12 with internal circular slot 13. Outer bushing 12 interacts with bearing ring 11 and cylindrical spring 16 positioned on inner bushing 8. EFFECT: increased productivity. 3 cl, 2 dwg