Statistical Weighing Method for Filling Machine Nozzles
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Solution Overview
Problem
Existing filling machines with multiple mechanical gripping means and measuring scales incur high handling and maintenance costs and require sophisticated electronic systems for precision, complicating the determination of product quantities.
Innovation Solution
A method for statistical weighing that uses a single scale and limited manipulating members to withdraw, weigh, and reintroduce containers, allowing for precise product quantity determination by subtracting tare from gross weight, reducing costs and simplifying operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple mechanical gripping means and measuring scales are used to verify delivery of each batching nozzle, then the reliability of product quantity determination is improved, but the handling and maintenance costs increase
Solution Approach 1:
The patent merges multiple measuring scales into a single scale for weighing bottles. Instead of having separate scales for tare weight and gross weight measurements, one scale performs both functions by weighing empty bottles before filling and filled bottles after filling, thereby reducing device complexity and maintenance costs while maintaining measurement reliability
Solution Approach 2:
The single measuring scale is designed to perform multiple functions: weighing empty bottles to determine tare weight, weighing filled bottles to determine gross weight, and potentially verifying delivery quantities. This multi-functional approach eliminates the need for multiple specialized devices, reducing both handling and maintenance costs
2Productivity
If multiple mechanical gripping means are used to withdraw and reposition bottles, then the productivity and verification capability are improved, but the handling costs and device complexity increase
Solution Approach 1:
The mechanical gripping means is designed to perform multiple operations: withdrawing empty bottles from the feeding line, repositioning them for filling, and later withdrawing filled bottles for weighing. This single multi-functional gripper system replaces what would otherwise require multiple specialized gripping devices, reducing handling costs while maintaining productivity
3Measurement precision
If sophisticated electronic handling systems are used to uniformize scale precision, then the measurement precision is improved, but the device complexity and costs increase
Solution Approach 1:
The patent addresses measurement precision by calibrating and adjusting parameters of the single measuring scale rather than introducing complex electronic handling systems. Through proper scaling, zeroing, and calibration procedures, the system achieves uniform measurement precision for both tare and gross weight measurements, maintaining reliability while minimizing device complexity
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 method reduces handling, installation, and maintenance costs while achieving high precision and reliability in product weighing, ensuring rapid and intuitive operation steps.
Implementation Method 1
weighing the withdrawn empty container to find out a tare weight; weighing the withdrawn filled container to find out its gross weight
Data Source
AI summary
According to a method for statistical weighing of a product supplied by a plurality of nozzles into containers, an empty container, belonging to a withdrawing group, is withdrawn to define an empty seat in the withdrawing group. The withdrawn empty container is weighed by a scale, to determine a tare weight, and then introduced in an empty seat made in a test group of containers, is a position designed to match with a selected nozzle to be tested. After introducing product into the weighed, empty container, by the selected nozzle, the filled container is withdrawn and weighed by the same scale to determine a gross weight. The exact quantity of product introduced into the filled container is thus determined by difference between the tare and gross weights.