Elastomeric Washer Strip Dispensing for Precise Tear-Line Cutting
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Solution Overview
Problem
Existing dispensing apparatus for coiled wiping material strips generate significant waste due to user-cut lengths that do not match needs, and require complex arrangements and high production costs.
Innovation Solution
A dispensing apparatus with elastomeric washers that deform under tensile stress to create precise tear lines for cutting strips, using a manually operable element to adjust the internal diameter of the washers for consistent cutting regardless of material thickness or orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If automatic cutting devices are integrated in the dispensing apparatus, then strip cutting precision is improved, but device complexity increases
Solution Approach 1:
The patent changes the physical state of the washer from rigid to elastomeric, allowing it to deform under tensile stress and automatically align with tear lines for precise cutting without complex mechanisms
Solution Approach 2:
The elastomeric washer automatically deforms and positions itself in response to user-applied tensile stress, eliminating the need for motorized or mechanically complex cutting devices
2Ease of manufacture
If the washer internal diameter is fixed, then manufacturing simplicity is improved, but adaptability to varying material thicknesses deteriorates
Solution Approach 1:
The washer transitions from a static fixed-diameter component to a dynamic component that changes its effective internal diameter through elastic deformation, adapting to different material thicknesses while maintaining manufacturing simplicity
Solution Approach 2:
The elastomeric material allows the washer's internal diameter parameter to change dynamically in response to applied stress and material thickness variations
3Ease of operation
If manual strip cutting is allowed, then ease of operation is improved, but material waste increases
Solution Approach 1:
The elastomeric washer acts as a compliant mechanical element that responds to user-applied force (analogous to pneumatic/hydraulic pressure) to enable precise cutting at tear lines, reducing waste while maintaining operational ease
Solution Approach 2:
The washer automatically positions itself and the cutting edge aligns with the tear line through elastic deformation, enabling users to cut precisely without complex guidance systems
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 simplifies the apparatus design, reduces production costs, and ensures precise cutting of strips with minimal waste, accommodating varying material thicknesses and hardnesses, while allowing flexible positioning of the material coil.
Implementation Method 1
the washers being made of an elastomeric material capable of being deformed under the effect of the material distribution through said opening
Data Source
AI summary
A dispensing apparatus for strips of coiled flexible material having at regular intervals tear lines to form the strips. The apparatus includes a casing receiving the coil, the casing having a circular opening for the passage and distribution of a strip of coiled flexible material under a tensile stress. The casing also includes at least one washer fixed on the casing concentrically with the distribution opening, wherein the internal diameter of the at least one washer is smaller than the diameter of the opening. The one or more washers are made of an elastomeric material capable of being deformed under the effect of the material distribution through the opening for achieving, concomitantly, a strip cut along a tear line. The one or more washers cooperate with an element manually operable and arranged to reduce the internal diameter of the one or more washers.