Upstream Weight Marking for Packaging Compliance
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Solution Overview
Problem
Existing packaging systems fail to accurately and efficiently mark packages with price information before sealing, leading to non-compliance with calibrated weighing and pricing guidelines, and lack flexibility in detecting product changes on the conveying path.
Innovation Solution
A packaging assembly with a forward weighing device upstream of the sealing station to detect product weight and print weight and price information onto a film web or label, followed by inspection downstream to verify conformity, allowing for calibration and space reduction by marking before sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If weight and price information is printed onto the film web or label upstream of the sealing station, then space requirements are reduced and pricing efficiency is improved, but the risk of printing errors and non-compliance with pricing guidelines increases
Solution Approach 1:
The system performs weight measurement and price information printing upstream of the sealing station, before the packaging is finalized. This preliminary action allows space reduction while maintaining compliance through subsequent verification steps
Solution Approach 2:
The system implements a feedback mechanism where an inspection device downstream of the sealing station verifies the printed weight and price information against the actual package weight. This closed-loop feedback ensures pricing compliance even though marking occurs upstream
2Measurement precision
If a forward weighing device is used to detect product weight before sealing, then pricing accuracy is improved, but device complexity increases
Solution Approach 1:
The system combines the forward weighing device, printer, and downstream inspection device into an integrated packaging assembly. This merging reduces overall system complexity compared to having separate standalone systems while maintaining high pricing accuracy
3Productivity
If weight information is printed before sealing, then productivity is improved, but the ability to detect product changes on the conveying path is reduced
Solution Approach 1:
The downstream inspection device provides feedback verification of the printed information, creating a quality control loop that maintains adaptability despite upstream marking
Solution Approach 2:
The system uses optical inspection devices (cameras, scanners) to detect and verify printed information, replacing mechanical inspection methods and enabling faster, more flexible verification downstream
Data Source
AI summary
A packaging assembly including a sealing station for sealing a product with at least one film web, wherein a printer is provided upstream of the sealing station and configured to print information, in particular a product weight and an associated retail price, onto the film web or onto a label, which may already be present on the film web, wherein, upstream of the sealing station, a forward weighing device is provided and configured to detect a weight value of a product and forward it to a control unit. The packaging assembly is characterized in that the control unit controls the printer for printing-on the information depending on the detected weight value, and that, downstream of the sealing station, at least a first inspection device is provided to read the information on the imprint. A method for making the packaging assembly is also included.