Web Material Feed Assembly with Anti-Wrinkling Roller Zones
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Solution Overview
Problem
Existing paper roll dispensers often cause wrinkling of tissue paper due to improper alignment or directional force issues, which impedes the dispensing process.
Innovation Solution
A web material feed assembly with first and second rollers, where the first roller has guiding and anti-wrinkling areas, forming a nip and anti-wrinkling space to prevent wrinkling by allowing the web material to extend fully and maintain flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the web material is fed through a nip formed by two rollers, then the web material can be dispensed, but the web material may wrinkle during travel through the nip
Solution Approach 1:
The roller surface is segmented into distinct functional zones: a guiding area that contacts the opposing roller to form the nip for material transport, and an anti-wrinkling area that is spaced apart to create clearance. This segmentation allows the same roller to perform multiple functions - guiding the material through the nip while providing a wrinkle-free zone where the material can relax without compression
Solution Approach 2:
Different regions of the roller serve different purposes with different geometric properties. The guiding area has a surface configuration optimized for contact and material guidance, while the anti-wrinkling area features a recessed or spaced configuration that provides local clearance. This local differentiation of geometric quality allows the system to simultaneously achieve firm nip engagement for transport and localized clearance for wrinkle prevention
2Ease of operation
If the pulling force is not exerted in an adequate direction or the tissue paper is not properly arranged, then the web material can still be fed through the nip, but wrinkles are formed that affect dispensing
Solution Approach 1:
The anti-wrinkling area is positioned to act on the web material before it enters the nip region. By providing a spaced, clearance-based zone upstream of the contact point, the system preliminarily corrects any misalignment, wrinkles, or improper arrangement of the material before it undergoes compression in the nip, ensuring that only properly arranged material enters the feeding zone
Solution Approach 2:
The anti-wrinkling area serves as an intermediary zone between the material source and the nip region. This intermediate spaced area allows the material to be gradually guided and corrected into proper alignment and flatness, mediating the transition from potentially disordered material to properly arranged material ready for nip engagement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively limits wrinkling and ensures smooth dispensing of web materials by creating a controlled nip and anti-wrinkling space, preventing creases and maintaining the material's flatness during dispensing.
Implementation Method 1
a first roller rotatably mounted relative to the housing of the web material dispenser about a first axis; a second roller rotatably mounted relative the housing of the web material dispenser about a second axis extending parallel to the first axis... forming a nip therebetween through which a web material is fed
Data Source
AI summary
The present disclosure concerns a web material feed assembly for a web material dispenser comprising a housing, the web material feed assembly comprising first and second rollers rotatable relative to the housing of the dispenser about first and second parallel axes. The first roller is provided with friction rings forming a nip between the first and second rollers for feeding the web material therethrough, at least one of the friction rings comprising a recessed surface forming an anti-wrinkling space between the first and second rollers. The disclosure also concerns a web material dispenser with such a web material feed assembly and a method for preventing wrinkles in a web material dispensed by a web material dispenser with such a web material feed assembly.