Loading and transfer system/assembly for sheet material dispensers
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Solution Overview
Problem
Dispensers for sheet materials, such as paper towels and tissue paper, face challenges in loading and transferring rolls, often resulting in tearing, jamming, and wasteful double sheet dispensing due to complex loading processes and manual intervention.
Innovation Solution
A dispenser assembly with a feed roller system, loading mechanism, and transfer assembly that includes a cover assembly with locking features, biasing members, and a transfer arm to facilitate seamless roll changes and prevent double dispensing, allowing automatic or manual operation to manage multiple supply rolls without manual refeeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual loading of sheet material through tight clearances is used, then the dispenser can be loaded with sheet material, but the sheet material is prone to tearing and ripping
Solution Approach 1:
The loading system is divided into separate functional components: a cover assembly that opens to provide access, a transfer arm with guide rollers that separately guide the sheet material, and a feed roller assembly that separately feeds the material. This segmentation allows each component to perform its function without subjecting the sheet material to excessive stress through tight clearances.
Solution Approach 2:
The transfer arm acts as an intermediary mechanism between the sheet material supply and the feed roller. It includes guide rollers that gently guide the sheet material into position and a transfer mechanism that smoothly transitions the material from the supply roll to the feeding mechanism, preventing tearing that would occur with direct manual loading through tight spaces.
2Ease of operation
If manual transfer of sheet material between supply rolls is performed, then the feeding can be transferred to a new supply, but significant downtime occurs
Solution Approach 1:
The system is designed with a pre-positioned transfer arm and guide rollers that are ready to immediately transfer sheet material when one supply is depleted. The transfer mechanism is pre-configured to receive material from either supply roll and redirect it to the feed roller, eliminating the need for manual refeeding and reducing downtime.
Solution Approach 2:
The transfer arm mechanism automatically detects when a supply roll is depleted and self-activates to transfer feeding from the remaining supply or a new supply roll to the feed roller. This automatic self-service transfer eliminates manual intervention and significantly reduces dispenser downtime.
3Productivity
If sheet material from multiple supplies is dispensed simultaneously, then feeding can continue when one supply is low, but double sheets are dispensed causing waste
Solution Approach 1:
The transfer arm is designed to be movable between different positions, dynamically switching which supply roll feeds the feed roller. When one supply is depleted, the transfer arm moves to redirect material from the other supply. This dynamic positioning ensures continuous feeding while preventing double dispensing, as only one supply is actively fed at any given time.
Solution Approach 2:
The guide rollers and transfer mechanism are positioned to create localized control over which supply roll's material is fed to the discharge. The system maintains different feeding paths for each supply, with the transfer arm selectively activating one path at a time, ensuring continuous operation without waste from simultaneous dispensing of both supplies.
4Ease of operation
If complex loading mechanisms are used to facilitate easy loading, then loading becomes simpler, but the device complexity increases
Solution Approach 1:
The guide rollers are nested within or integrated with the transfer arm structure, and the transfer arm itself is integrated with the cover assembly. This nested arrangement allows the loading facilitation features to be incorporated without adding significant external complexity, as each component serves multiple functions and is compactly integrated with others.
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 dispenser assembly simplifies the loading and transfer of sheet materials, reducing tearing and jamming, and eliminates double sheet dispensing, ensuring efficient and continuous operation with minimal user intervention.
Implementation Method 1
a biasing member, such as a spring or other suitable biasing member, in communication with the cover body and the dispenser housing to bias the cover towards its open position
Implementation Method 2
The feed roller(s) can be automatically driven, e.g., by one or more powered drive mechanisms, such as a motor or other suitable actuator
Data Source
AI summary
A sheet material dispenser can include a dispenser housing that supports one or more supplies of sheet material, and a feed roller configured to engage and feed the sheet material from the dispenser housing. The dispenser also can include a sheet material loading assembly including a cover that is rotatably connected the dispenser housing and movable between a closed position and an open position. The sheet material loading assembly further can include a roller that is rotatably connected to the cover and configured to be coupled to a portion of sheet material from one of the supplies, with the cover in its open position, and to press the portion of sheet material into engagement with the feed roller body, with the cover in its closed position, to initiate dispensing of the at least one supply from the dispenser.