A pack of folded sheets, a dispenser and a system comprising dispenser pack
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Solution Overview
Problem
Existing packaging and dispensing systems for interfolded cellulosic sheet products do not ensure compatibility between the sheet packs and dispensers, leading to potential misuse of unsuitable packs with sheets lacking complementary channels.
Innovation Solution
Incorporating a continuous channel formed by punchings through each sheet in the pack and a complementary protuberance within the dispenser's cavity, ensuring only packs with specific channels can be inserted, preventing incorrect usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packs of interfolded sheets are designed without specific channel features, then manufacturing and packaging are simpler, but compatibility with dispensers cannot be ensured leading to potential misuse
Solution Approach 1:
The pack is pre-configured with punchings that form channels before insertion into the dispenser. This preliminary structuring ensures that when the pack is inserted, the channels are already in place to guide the withdrawal of individual sheets, preventing misuse and ensuring compatibility without requiring complex assembly steps at the point of use.
Solution Approach 2:
The channel formed by the punchings acts as an intermediary element between the pack of interfolded sheets and the dispenser mechanism. This channel guides the withdrawal path of individual sheets, mediating the interaction between the user's withdrawal action and the dispenser's release mechanism, thereby ensuring reliable operation.
2Ease of operation
If a continuous channel is formed through each sheet in the pack, then sheet withdrawal is facilitated, but the pack structure becomes more complex
Solution Approach 1:
The continuous channel is created by punching through each individual sheet in the stack, segmenting the channel formation into discrete punched holes in each sheet. This segmentation allows the channel to be formed through the entire pack thickness using simple punching operations on individual sheets, rather than requiring complex continuous channel formation equipment.
Solution Approach 2:
The same punching pattern is replicated through each sheet in the pack, creating identical channels in every sheet. This copying approach ensures that each sheet can be individually withdrawn through the same path, simplifying the withdrawal mechanism while maintaining consistency across all sheets in the pack.
3Reliability
If protuberances are added to the dispenser cavity, then only compatible packs can be inserted preventing errors, but the dispenser structure becomes more complex
Solution Approach 1:
Protuberances are added to the dispenser cavity to create an asymmetric geometry that only accommodates packs with corresponding asymmetric channel patterns. This asymmetry ensures that incompatible packs cannot be inserted, as their channel patterns do not match the protuberance configuration, providing a mechanical prevention of incorrect usage.
Solution Approach 2:
The protuberances are positioned in the dispenser cavity to preemptively prevent insertion of incompatible packs. By having the protuberances in place before pack insertion attempts, the system actively blocks incorrect packs from being inserted, rather than detecting or correcting mismatches after insertion has begun.
Data Source
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AI summary
The package interfolded sheets comprising at least one punching which passes through each of said sheets forming a continuous channel extending from an upper face to a lower face of the interfolded sheet pack. A sheet pack dispenser has protuberances complementary to the continuous channel, so that the dispenser can only accept the paper packs dedicated to the dispenser and not others.