Appeal No. 1995-3349 Page 2
Application No. 08/066,994
The appellant's invention is directed to a method for
cleaning workpieces of foreign matter attached thereto by oil
via immersion in a deaerated aqueous treating solution (2-5 ppm
dissolved oxygen content), which solution is ultrasonically
vibrated. Burrs are removed in the same (claim 1) or a second
cleaning tank (claim 7). An understanding of the invention can
be derived from a reading of exemplary claims 1 and 7, which
are reproduced below.
1. A method of ultrasonically cleaning a workpiece, said
workpiece having foreign matter attached thereto by oil,
comprising the steps of:
deaerating a non-chlorofluorocarbon aqueous cleaning
solution containing a surface active agent to a dissolved
oxygen content ranging from 2 to 5 ppm;
heating said cleaning solution to a temperature ranging
from 30° to 55° C;
supplying an ultrasonic cleaning tank having an ultrasonic
vibrator mounted on a bottom thereof with said aqueous cleaning
solution which has been deaerated to said dissolved oxygen
content;
immersing a workpiece in said cleaning solution; and
radiating ultrasonic energy from the ultrasonic vibrator
into the cleaning solution to remove said foreign matter
attached to said workpiece by oil, and burrs, off the
workpiece.
7. A method of ultrasonically cleaning a workpiece,
comprising the steps of:
Page: Previous 1 2 3 4 5 6 7 8 9 10 Next
Last modified: November 3, 2007