Grooved Pinch Roller Assembly to Prevent Wet Sheet Wrapping
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Solution Overview
Problem
Existing sheet product dispensers face issues with water presence causing the sheet product to adhere to or wrap around the pinch roller, impeding proper dispensing.
Innovation Solution
A pinch roller assembly with a roller body and multiple clips, where the clips are rotatably associated with the roller body, preventing adherence by remaining stationary and allowing the roller body to rotate freely, thus preventing sheet product from wrapping around during dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water is present in the dispenser, then the sheet product may adhere to the pinch roller, but the dispenser can still dispense sheet product
Solution Approach 1:
The roller body surface is segmented into multiple grooves that divide the continuous surface into separate sections. This segmentation prevents the sheet product from forming a continuous adhesive bond around the roller, allowing the sheet to be released more easily even when wet.
Solution Approach 2:
The roller body has different surface properties in different locations - the grooves create areas with reduced surface area and different contact characteristics compared to the raised portions. This local variation in surface quality reduces the overall adherence of wet sheet product to the roller.
2Productivity
If the pinch roller rotates freely, then the sheet product can pass through the nip, but the sheet product may wrap around the pinch roller when wet
Solution Approach 1:
The grooves segment the roller surface to prevent continuous wrapping of wet sheet product. The segmented structure allows the sheet to be gripped and released in discrete sections rather than forming a continuous wrap that would impede rotation.
Solution Approach 2:
The roller body rotates freely to maintain dispensing productivity, while the grooves dynamically adjust the contact points between the roller and wet sheet product. This dynamic interaction allows rotation to continue without the sheet forming a restrictive wrap.
Data Source
AI summary
A pinch roller assembly for a sheet product dispenser includes a roller body and a plurality of clips. The roller body includes a plurality of grooves. The roller body is rotatably associated with the plurality of clips, each clip being disposed in one of the plurality of grooves.