Tear-Off Code Cover for Clean, Tamper-Evident Exposure
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Solution Overview
Problem
Voucher cards with scratch-off plastic layers for code exposure create dust and dirt, and the code can be unauthorizedly exposed and reused, compromising security.
Innovation Solution
A code presentation arrangement using an opaque cover section with a detachable tear-off tab to expose the code, eliminating the need for additional components and ensuring the code cannot be reattached, thus enhancing security and cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a scratch-off plastic layer is used to cover the code, then the code is protected from unauthorized exposure, but dust and dirt are created when scratching off the cover
Solution Approach 1:
The harmful plastic layer is extracted and replaced with a tear-off tab made of the same card material. The tab is detached by pulling, which removes the covering without generating dust or dirt, thus eliminating the harmful factor while maintaining code protection.
Solution Approach 2:
The material parameter of the cover is changed from plastic to card material (paper). This parameter change eliminates the dust-generating property of plastic while maintaining the protective function, as paper tears cleanly without creating fine particulate matter.
2Reliability
If a scratch-off plastic layer is used to cover the code, then the code is protected from unauthorized exposure, but the cover can be lifted and reattached to hide unauthorized reading
Solution Approach 1:
The cover is segmented into a permanent adhesive area and a detachable tab area. The tab is connected by a perforated line that allows clean separation. Once detached, the tab cannot be reattached to hide the code, making unauthorized reading detectable while maintaining protection when attached.
Solution Approach 2:
Instead of making the cover permanently adherent (which would prevent detection of unauthorized reading), the invention makes it detachable in a controlled way. The inversion is that the cover transitions from attached (protected) to detached (code exposed and permanently visible), making unauthorized detection possible while maintaining reliability when attached.
3Object-generated harmful factors
If an opaque cover section with tear-off tab is used, then the code can be exposed without dust or dirt, but additional components are needed
Solution Approach 1:
The cover section is merged with the card itself rather than being a separate component. The tab is formed as an integrated part of the card stock, connected by perforations. This merging eliminates the need for additional plastic layers or separate cover components, reducing device complexity while maintaining the dust-free exposure benefit.
4Reliability
If the cover section is permanently attached, then the code remains protected, but it cannot be exposed for use
Solution Approach 1:
The perforated line is pre-formed during manufacturing, preparing the structure for future detachment. This preliminary action allows the user to easily detach the tab by pulling along the pre-scored line, making code exposure simple and intuitive while maintaining strong attachment during storage and transport.
Data Source
AI summary
A code presentation arrangement (10) consists of a carrier (20) and a card (30) attached to the carrier (20) or consists only of a card (30), wherein the card (30) or the carrier (20) respectively has a code presentation side (21b) on which a code (12) is applied. To enable more pleasant exposure of the code and more reliable detection of a code that has already been exposed, the code (12) on the code presentation side (21b) is covered by an opaque cover section (24) of the carrier (20) or an opaque cover section of the card (30), wherein the respective cover section is attached to the code presentation side (21b) by permanent adhesive strips (25) positioned along the edges of the code (12), and wherein the respective cover section in the area of the code (12) between the permanent adhesive strips (25) has a detachable tear-off tab (26) through which the code (12) can be exposed by pulling from the side facing away from the code (12).