Method for the manufacture of security paper
AssigneeThe Wiggins Teape Group Limited
InventorColin Austin Harris
Life of this patent
Estimating the term…
Abstract
Security paper carries an intricate tactile surface profile pattern which has been imparted to the paper during its manufacture, at a stage after initial de-watering but before final drying, by passing the paper through a nip between a forming surface corresponding to the desired pattern and a backing surface. The tactile pattern is of excellent durability, and its intricacy offers a high degree of security. The tactile pattern is visible when viewed under low angle light, which facilitates verification or authentication of security documents made using the patterned paper.
Claims7
A method of producing security paper carrying an intricate tactile surface profile pattern, comprising the step of passing an initially de-watered, but not yet fully-dried paper web through a nip between a forming surface corresponding to the desired pattern and a backing surface, thereby to impart the intricate tactile surface profile pattern to the surface of the web, prior to drying the web in conventional manner.
A method for producing a security paper carrying an intricate tactile surface profile pattern which has been imparted to the paper during its manufacture, at a stare after initial de-watering but before final drying, said method including steps of initial de-watering and final drying and further comprising passing the paper through a nip between a forming surface corresponding to the desired pattern and a backing surface.
Dependencies are inferred from the claim text.