Method for the surface application of a security device to a substrate
First Claim
1. A fibrous sheet material having opposing surfaces and a recessin one opposing surface, which comprises:
- a fibrous sub-region disposed beneath the recess, and an immediate adjoining bulk-region disposed next to the recess and the sub-region;
a surface applied security device disposed in the recess; and
an interface between the surface applied security device and the one opposing surface,wherein the surface applied security device has been introduced during a wet stage of a paper manufacturing process where a fibrous web was sufficiently consolidated as a fully formed wet web, wherein by introducing the security device at this wet stage of the paper manufacturing process, the security device has been adequately forced into the fibrous web to further consolidate fibers in the sub-region rather than displacing them, wherein a water level and/or a moisture level of the sufficiently consolidated fibrous web ranged from about 60% to about 90% by weight, based on a total weight of the fibrous web, when the surface applied security device was introduced.
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0 Petitions
Accused Products
Abstract
A method for applying a security device (e.g., a micro-optic security thread) to a fibrous web during manufacture is provided. By way of the inventive method, the security device is preferably applied onto the fibrous web at or near a couch roll or similar tool of a paper machine when the fibrous web constitutes a sufficiently consolidated, fully formed wet web. Papers made in accordance with the inventive method, when subjected to the Circulation Simulation Test, showed minimal damage at the paper/security device interface. Moreover, the surface-applied security devices showed acceptable levels of intaglio ink adhesion, and the papers had higher cross-direction (CD) tensile strength and much less show-through on opposing sides thereof.
299 Citations
26 Claims
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1. A fibrous sheet material having opposing surfaces and a recess
in one opposing surface, which comprises: -
a fibrous sub-region disposed beneath the recess, and an immediate adjoining bulk-region disposed next to the recess and the sub-region; a surface applied security device disposed in the recess; and an interface between the surface applied security device and the one opposing surface, wherein the surface applied security device has been introduced during a wet stage of a paper manufacturing process where a fibrous web was sufficiently consolidated as a fully formed wet web, wherein by introducing the security device at this wet stage of the paper manufacturing process, the security device has been adequately forced into the fibrous web to further consolidate fibers in the sub-region rather than displacing them, wherein a water level and/or a moisture level of the sufficiently consolidated fibrous web ranged from about 60% to about 90% by weight, based on a total weight of the fibrous web, when the surface applied security device was introduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for a surface application of a surface applied security device to a fibrous sheet material, comprising:
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introducing the security device into or onto a forming fibrous web, at a point of introduction, during paper manufacturing; and wherein the fibrous web is sufficiently consolidated, at least at the point of introduction, such that a water level and/or a moisture level ranges from about 60% to about 90% by weight, based on a total weight of the fibrous web, when the surface applied security device is introduced, and wherein the security device is introduced during a wet stage of the paper manufacturing process where the fibrous web is sufficiently consolidated as a fully formed wet web, wherein by introducing the security device at this wet stage of the paper manufacturing process, the security device is adequately forced into the fibrous web to further consolidate fibers in a sub-region rather than displacing them. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification