Limiting shelf life for limited play optical information...

G - Physics – 11 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G11B 3/70 (2006.01) B01D 53/02 (2006.01) B01D 53/34 (2006.01) B32B 3/00 (2006.01) G11B 7/24 (2006.01) G11B 7/257 (2006.01) G11B 23/28 (2006.01)

Patent

CA 2431164

An optically readable media and packaging therefor, where the media includes a material that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media. The media is sealed within the packaging with a source of a chemical compound that inhibits the change, and the media is also sealed within the packaging with a getter of the chemical compound that over time absorbs said chemical compound, or which a substance that over time renders unreactive a reactive chemical compound. In a further embodiment the media is sealed within the packaging with a getter of a chemical compound that promotes the change. In this case the getter absorbs the chemical compound until saturated with the chemical compound, after which the concentration of the chemical compound until saturated with the chemical compound, after which the concentration of the chemical compound increases until the media is rendered unreadable. As non- limiting examples, the chemical compound may be NMP, DMF, acetone, or HCl. In another embodiment the media further includes a diffusion barrier that inhibits but does not prevent the chemical compound from reaching a layer of the media that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, while in another embodiment the source of the chemical compound includes the diffusion barrier. In a further embodiment the media includes a first layer that over time undergoes the at least one of a chemical change or a physical change, a second layer that contains the source of a chemical compound that promotes the change, and the diffusion barrier is interposed between the first layer and the second layer.

L'invention concerne un support lisible de manière optique et son emballage. Ledit support comporte un matériau qui, avec le temps, subit au moins une modification chimique ou physique rendant ledit support illisible. Le support est scellé dans un emballage contenant une source de composé chimique qui inhibe ladite modification. En outre, ledit support est scellé dans l'emballage avec un getter du composé chimique qui, avec le temps, absorbe ledit composé chimique, ou dont la substance transforme avec le temps un composé réactif en composé non réactif. Dans un autre mode de réalisation, le support est scellé dans l'emballage avec un getter d'un composé chimique qui favorise la modification. En l'occurrence, le getter absorbe le composé chimique jusqu'à ce qu'il en soit saturé, après quoi, la teneur du composé chimique augmente jusqu'à ce que le support devienne illisible. Par exemple, le composé chimique peut être NMP, DMF, acétone ou HCl. Dans un autre mode de réalisation, le support peut également renfermer une barrière de diffusion qui inhibe le composé chimique sans l'empêcher d'atteindre une couche du support qui, avec le temps, subit au moins une modification chimique ou physique qui le rendent illisible, tandis que dans un autre mode de réalisation, la source du composé chimique renferme une barrière de diffusion. Dans un autre mode de réalisation encore, le support comporte une première couche qui, avec le temps, subit au moins un modification chimique ou physique, une seconde couche qui contient la source d'un composé chimique qui favorise cette modification, la barrière de diffusion s'interposant entre les première et seconde couches.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Limiting shelf life for limited play optical information... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Limiting shelf life for limited play optical information..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limiting shelf life for limited play optical information... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1621069

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.