Scouring pad device and method for making same
US4674237A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 1981 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | May 7, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2432/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved scouring pad device comprises first and second bats each of which is made of a porous, fiberous, heat-weldable, polymeric material having an outer abrasive surface and an inner surface opposite the outer abrasive surface. An envelope layer of fluid impervious, heat-weldable, sheet-like polymeric material, and having outwardly and inwardly facing surfaces, lies adjacent each of the bats with the outwardly facing surface of the envelope layer confronting the inner surface of the bat. A reservoir layer of heat-weldable liquid absorbent material is disposed between the inwardly facing surfaces of the envelope layers. The bats, the two envelope layers, and the reservoir layer are welded together at a continuous closed boundary. A cleaning composition such as soap is carried in the reservoir layer and is temporarily confined between the first and second envelope layers within the boundary. Each of the envelope layers is perforated, having at least one hole therethrough, so that the cleaning composition can be released through at least one of the bats, to the abrasive surface of that bat. A method employing mass production techniques is also disclosed for manufacturing such sc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.