U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Composite sheet material and mop embodiment thereof

Patent 5217787 Issued on June 8, 1993. Estimated Expiration Date: Icon_subject May 9, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

2320372

2354969

2514496

3228820

3355535

3687797

3827099

Mops of cellulose sponge cloth material
Patent #: 4097952
Issued on: 07/04/1978
Inventor: Lindstrom

Mop comprising bonded nonwoven fabric absorptive elements
Patent #: 4114224
Issued on: 09/19/1978
Inventor: Disko

Mop having skip slit absorptive element
Patent #: 4288884
Issued on: 09/15/1981
Inventor: Bahls

More ...

Inventor

Assignee

Application

No. 697788 filed on 05/09/1991

US Classes:

428/134, Noncircular aperture (e.g., slit, diamond, rectangular, etc.)15/229.1, Having strands15/244.4, Sponge428/136, Slit or elongated428/181, Pleats or otherwise parallel adjacent folds428/304.4, Composite having voids in a component (e.g., porous, cellular, etc.)428/316.6, Plural void-containing components428/317.1, With component specified as adhesive or bonding agent428/317.7, Composition of adhesive or bonding component specified442/373Plural fabric layers

Examiners

Primary: Van Balen, William J.

Attorney, Agent or Firm

International Classes

A47L 013/20
B32B 003/26

Abstract

Material multi-faceted as to its advantageous properties and highly versatile in use and application comprises a very light, relatively thin, sheet-like structure, a layered composite of cellular and non-woven materials. Said structure is formed of layered sheets, bonded to one another, including a thin sheet of a cellular material the face(s) of which have a very thin sheet-like overlay of a non-woven permeable reinforcing material such as, preferably, rayon or nylon. The body of the cellular sheet material, preferably of plastic such as polyurethane, polyester or polyether, is characterized by innumerable extremely small, relatively minute pockets having extremely thin elastic wall portions through which fluid may readily pass to said pockets to store therein in amounts the volume of which may be a significant multiple of that originally defined by said wall portions. Exmbodiments of such sheet-like structure are formed and conditioned to readily filter, pass or store fluid and substantially fully release fluid stored therein when under the influence of a moderate application of pressure. When the fluid is a liquid the extent and speed of its release insures a quick drying of this material. An illustrative demonstration of the invention comprises a short length of said sheet-like structure having multiple slits portions of which define lines upon which it can be quickly folded on itself and produce a layered mop which is extremely light in weight and even more effective in application to its intended use than the original form of said sheet-like structure.

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