Claims
- 1. A cleaning sponge roller made of a polyvinyl acetal-based porous sponge having elasticity in a wet state, comprising:a generally cylindrical roll body defining a periphery; and a plurality of protrusions integrally molded to the periphery of the roll body, each of the protrusions having a tapered protruding base portion extending from the periphery of the roll body, said base portion having a maximum sectional area at a base end thereof at the roll periphery and tapering to a top end thereof, and each protrusion further including a protruding end portion extending from the top end of the respective base portion to a top portion of the protruding end portion with the end portion having a generally uniform sectional shape such that the sectional area of the end portion is substantially uniform from adjacent the top end of the base portion to the top portion of the protruding end portion and the section area of the end portion is less than that of the base portion at the base end thereof.
- 2. The cleaning sponge roller according to claim 1, wherein said protruding base portion has an outer surface formed in a divergent shape toward the periphery of the roll body.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8-312867 |
Nov 1996 |
JP |
|
11-051274 |
Feb 1999 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a divisional of U.S. application Ser. No. 09/503,626, filed Feb. 11, 2000, now U.S. Pat. No. 6,502,273, which is a continuation-in-part of application Ser. No. 09/297,617, filed Jun. 25, 1999 which is now abandoned, which is a national stage of PCT/JP97/03971, filed Oct. 31, 1997, which applications are hereby incorporated by reference in its entirety.
US Referenced Citations (10)
Foreign Referenced Citations (10)
Number |
Date |
Country |
632357 |
Feb 1937 |
DE |
59-006974 |
Jan 1984 |
JP |
60-186085 |
Dec 1985 |
JP |
01-006953 |
Feb 1989 |
JP |
03-257456 |
Nov 1991 |
JP |
05-028759 |
Jul 1993 |
JP |
08-117717 |
May 1996 |
JP |
10-034091 |
Feb 1998 |
JP |
10-180198 |
Jul 1998 |
JP |
9747406 |
Dec 1997 |
WO |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/297617 |
|
US |
Child |
09/503626 |
|
US |