Image forming method, image forming apparatus, and image forming program
US-2021389660-A1 · Dec 16, 2021 · US
Security devices and methods of manufacture thereof
US9804497B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9804497-B2 |
| Application number | US-201214351448-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 11, 2012 |
| Priority date | Oct 11, 2011 |
| Publication date | Oct 31, 2017 |
| Grant date | Oct 31, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of manufacturing at least part of a security device, the method comprising: conveying a substrate web comprising a photosensitive film along a transport path, the photosensitive film being adapted to exhibit an increase in optical density upon exposure to radiation of a predetermined wavelength and concurrent or subsequent heating, the increase in optical density being due to the formation of bubbles within the photosensitive film; exposing…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9804497B2 cover?
- 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 t…
- Who is the assignee on this patent?
- De La Rue Int Ltd
- What technology area does this patent fall under?
- Primary CPC classification G03C5/08. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Oct 31 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).