Side Notch Paper for Portion Control Machines
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Solution Overview
Problem
Existing sheet-form paper used in portion control machines for forming patties faces issues with thinner sheets falling out of support means and not providing adequate 'hold back' force, leading to inefficiencies and potential tearing when trying to increase stiffness.
Innovation Solution
The introduction of recesses on opposing edges of the sheet with slits that engage support rails, providing both front/back and side support, allowing for thinner sheets to be used without falling or tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If thinner sheets of paper are used to reduce cost and improve flexibility, then material cost decreases and flexibility increases, but the sheets fall out of support rails and lack adequate hold back force
Solution Approach 1:
The paper sheet is segmented with recesses at the side edges and slits extending inward from these recesses. This segmentation creates discrete engagement points with the support rails, allowing thinner paper to be reliably retained through multiple localized contact points rather than relying on overall sheet stiffness.
Solution Approach 2:
The paper structure is modified locally at the side edges with recesses and slits, creating areas of concentrated flexibility and engagement capability. This local quality enhancement allows the thinner paper to interact effectively with the support rails at specific locations without requiring the entire sheet to be thicker or stiffer.
2Reliability
If paper sheets are made stiffer to prevent falling out of support rails, then sheet retention improves, but the paper becomes prone to tearing during deformation
Solution Approach 1:
By segmenting the paper with recesses and slits, the structure distributes mechanical stresses to specific zones away from critical areas. This segmentation allows the paper to flex and deform during dispensing without concentrating stress that would cause tearing, while still maintaining adequate stiffness for retention.
Solution Approach 2:
The paper structure parameters are changed by introducing recesses and slits that modify the moment of inertia and flexural stiffness locally. This allows the paper to have sufficient stiffness for retention while maintaining overall flexibility and tear resistance through the strategically placed geometric features.
3Reliability
If more severe bends are applied to deformable elements to increase hold back force, then sheet retention improves, but the paper tends to tear
Solution Approach 1:
The recesses and slits create segmented deformation zones that distribute the bending stress throughout the paper structure. This segmentation allows the paper to achieve adequate hold back force through cumulative effect of multiple gentle bends rather than a single severe bend, preventing tear propagation.
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
This design enhances the throughput of patty forming machines by maintaining thinner sheets in position and preventing sagging, while minimizing the risk of tearing, thus enabling the use of thinner, more flexible sheets without increasing costs.
Implementation Method 1
the frictional force between the bottom-most sheet that is being dispensed and the next sheet in the stack is insufficient to pull the next sheet free from the guide
Implementation Method 2
the deformable elements, such as the notches, on the side edges of the sheets cause each individual sheet to be bent at an extreme angle when pulled past the male guide without tearing the paper
Data Source
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AI summary
A sheet-form paper for separating portions produced by a portion control machine and dispensing from a paper feed system, each sheet of the sheet-form paper including a recess formed in at a side edge for receiving a male guide, and a slit extending inwardly from an edge of the recess for engaging a knife edge of the male guide. The slit extends from an innermost edge of the recess substantially perpendicular to the side edges of the sheet.