Resources Contact Us Home
Making paper

Image Number 5 for United States Patent #6616803.

This invention is directed to improvements in paper incorporating an elongate impermeable element, to a method of making such paper and to documents made therefrom. The invention therefore comprises a method of making single ply paper having an elongate impermeable strip at least partially embedded therein, comprising the steps of blinding one or more selected areas of a porous support surface, depositing a first layer of paper fibres onto the porous support surface around the blinded areas, bringing the strip to lie in contact with the blinded areas of the support surface such that at least edges of the strip over lie the deposited fibres, and depositing a further layer of paper fibres over the first layer and the impermeable strip to securely embed the edges of the strip within the paper, said blinded areas being impermeable to substantially prevent the deposition of fibres thereon before the security element is laid thereover and to thereby form a plurality of discrete translucent or transparent windows in a first surface of the paper in which regions of one side of the strip are exposed, wherein substantially no paper fibres are deposited along on an opposite side of the length of the strip in a region between the edges to thereby expose a continuous area of the strip at a second surface of the paper.

  Recently Added Patents
Dot templates for object detection in images
Nucleic acid sequences encoding strictosidine synthase proteins
Implantable medical devices including elongated conductor bodies that facilitate device and lead configuration variants
Cooking brush
Shoe outsole with a surface ornamentation contrast
Method for evaluating performance characteristics of dental curing lights
Quantum dot template for fast and simultaneous detection of different infectious agents
  Randomly Featured Patents
Tree scents
Multi-lumen catheter system used in a blood treatment process
Gripper joint
Method of and apparatus for use in the depuration of bivalves
Debugging mechanism and debugging register
Image compression processing apparatus having means for removing jitter contained at boundary between image and mask portions
Hardware in a computer system for maintenance by a remote computer system
Appliance development toolkit with editor to create shared variable namespace
Programmable controller unit and method of processing user program
Coated body with nanocrystalline CVD coating for enhanced edge toughness and reduced friction