Low density matting and process
Patent 4342807 Issued on August 3, 1982. Estimated Expiration Date: 
February 4, 2000. 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.
February 4, 2000. 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 ReferencesInventorsAssigneeApplicationNo. 06/117980 filed on 02/04/1980US Classes:428/180, Waffle-form428/182, Parallel corrugations428/222, Embodying intertwined or helical component(s)442/400, Melt-blown nonwoven fabric442/409, Autogenously bonded nonwoven fabric47/56, SEED TAPE OR MAT, METHOD OR APPARATUS47/9MULCHINGExaminersPrimary: Silverman, Stanley S.Attorney, Agent or FirmInternational ClassesB01D 39/08 (20060101)D04H 3/16 (20060101) Foreign Application Priority Data1975-07-09 DEAbstractA low density matting structure of improved transverse strength obtained by vertically laying continuous melt-spun thermoplastic macrofilaments (diameter=0.1-1.5 mm) onto a horizontally moving profiled support in overlapping rows of irregularly looped filaments to form a peak and valley three-dimensional structure undulating in its longitudinal and/or transverse direction. The matting articles consist essentially of the melt-spun filaments which are self-bonded or fused at random points of intersection without using any bonding agent or reinforcing inserts, and the resulting matting is especially distinguished by a high transverse strength per unit of surface weight of at least 2 Nm/g and preferably 4 Nm/g.Field of SearchSurface deformation only (e.g., embossing)Liberation or formation of fibers With formation of filaments Article is sheet or web To similarly formed batt With formation of lamina by bulk deposition of discrete particles to form self-supporting article Bonding in specified environment (other than temperature) By heat With removal of filamentary material subsequent to lamination thereof To web of indefinite length Plural filaments | |
