Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Reexamination Certificate
1999-05-04
2001-01-30
Ball, Michael W. (Department: 1733)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
C015S244300
Reexamination Certificate
active
06180035
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method of fabricating a scouring pad for a cleaning equipment, and more particularly to an efficient scouring pad fabrication method which doubles the productivity.
Conventionally, the fabrication of a scouring pad comprises the step of pouring a sponge dope
7
in a mold
9
, the step of covering a scouring pad
8
on the sponge dope
7
, and the step of heating the mold
9
, enabling the sponge dope
7
to be foamed into a sponge
71
. After foaming, the sponge
71
and the scouring pad
8
are formed integral with each other. This scouring pad fabrication method is less efficient.
SUMMARY OF THE INVENTION
The present invention provides a scouring pad fabrication method which doubles the productivity. According to the present invention, a first scouring pad is put in the mold that the top side wall of the scouring pad is coated with a layer of hydrophilic material before pouring a sponge dope into the mold, then a second scouring pad is covered on the sponge dope before foaming. The hydrophilic material is dissolved in the sponge dope when the mold is heated, and foamed with the sponge dope into a sponge sandwiched in between the scouring pads. After foaming, the foamed material is split into two equal halves each having a sponge layer and a scouring pad at one side of the sponge layer.
REFERENCES:
patent: 4692199 (1987-09-01), Kozlowski et al.
patent: 4781774 (1988-11-01), Steward et al.
patent: 4975135 (1990-12-01), Lowe
patent: 5000805 (1991-03-01), Lowe
Hsieh Ming-Ti
Lin Mo-Hsaing
Ball Michael W.
Musser Barbara J.
Rosenberg , Klein & Lee
LandOfFree
Scouring pad fabricating method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scouring pad fabricating method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scouring pad fabricating method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2508408