Process for the manufacture of articles of water-hardening material

Patent 4242407 Issued on December 30, 1980. Estimated Expiration Date:

December 19, 1998. 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.

Abstract Claims Description Full Text

Patent References

3611699

Gypsum wallboard and process for making same
Patent #: 3944698
Issued on: 03/16/1976
Inventor: Dierks , et al.

4065597

Hardenable sheet materials
Patent #: 4102338
Issued on: 07/25/1978
Inventor: Parker

Oil sorbing mat
Patent #: 4107051
Issued on: 08/15/1978
Inventor: Lorentzen

Plastic reinforcement of concrete Patent #: 4168924
Issued on: 09/25/1979
Inventor: Draper , et al.

Inventor

Bijen, Jan M. J. M.

Application

No. 05/971065 filed on 12/19/1978

US Classes:

442/386, Including a layer derived from a water-settable material (e.g., cement, gypsum, etc.)156/276, With mass application of nonadhesive fibers or particles between laminae156/42, With embedding of reinforcing material during or subsequent to core formation264/136, Impregnation of batt, sheet, or filament264/146, Slitting longitudinally264/257, One component is a fibrous or textile sheet, web, or batt264/258, Joining a plurality of superposed fibrous or textile layers264/333, Inorganic hydraulic settable material shaping428/910PRODUCT WITH MOLECULAR ORIENTATION

Examiners

Primary: Dixon, William R. Jr.

Attorney, Agent or Firm

Cushman, Darby & Cushman

International Classes

C04B 16/00 (20060101)
C04B 16/06 (20060101)
B28B 23/00 (20060101)

Foreign Application Priority Data

1977-12-30 NL

Abstract

An improved process for the manufacture of shaped articles from water-hardening materials reinforced with multiple layers of a fibrillated organic film. A plurality of networks are formed from fibrillated organic films and are simultaneously advanced into contact with a water-hardening material to form a composite layer of the networks impregnated with the water-hardening material. This layer is thereafter formed into the desired configuration for the shaped article, and allowed to set. The average number of meshes within the networks with a minimum of two per square centimeter and the number of networks within the layer are such that the average number of meshes per cubic centimeter of the final shaped article is at least 100.