Security devices and methods of manufacture thereof

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9804497
APP PUB NO 20140306441A1
SERIAL NO

14351448

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A method of manufacturing a security device including: conveying a substrate web including a photosensitive film along a transport path; exposing the photosensitive film to radiation of a predetermined wavelength through a mask, wherein the mask includes a predetermined pattern of regions which are substantially opaque to radiation of the predetermined wavelength and at least semi-transparent to radiation of the predetermined wavelength, respectively; during the exposure, moving the mask alongside the substrate web along at least a portion of the transport path at substantially the same speed as the substrate web, such that there is substantially no relative movement between the mask and the substrate web; and heating the substrate web including the exposed photosensitive film. In this way, regions of the photosensitive film exposed to the radiation of the predetermined wavelength undergo an increase in optical density such that the photosensitive film displays a reproduction of the predetermined pattern.

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Patent Owner(s)

Patent OwnerAddress
FLOWROX OYPL 338 LAPPEENRANTA 53101

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lister, Adam Andover, GB 16 40

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