Tetra Pak Straw Pipette Detection Keeps Carton Codes and Straws Correct

2026/11/09 11:27

On fast paper-carton beverage lines, small defects can quickly become large batches: missing or blurred inkjet codes, unreadable characters, position offsets, duplicate codes, or missing drinking straws. Tetra Pak Straw Pipette Detection is positioned as an inline, non-contact vision inspection system that checks inkjet printing quality and straw presence in real time, then triggers automatic rejection so nonconforming packages are removed without interrupting production flow.

High-speed Tetra Pak inspection system on line


Equipment configuration and technical specifications

Tetra Pak Straw Pipette Detection is described as an inkjet printing inspection system designed for paper-packaged beverage production lines, supporting inline inspection without physically damaging products.

Inline straw and inkjet inspection system


Technical specifications

ItemSpecification
Equipment nameInkjet Printing Inspection System
ModelTetra Pak Straw Pipette Detection
Product nameTetra Pak Straw Pipette Detection
Maximum production speed24,000 bags/hour
Inspection scopeInkjet printing quality and straw presence
Rejection methodAutomatic, precise removal of defective packages identified during inspection
Protection ratingIP65

Operational features buyers often check

For procurement and line integration, Tetra Pak Straw Pipette Detection is typically evaluated on stability, traceability, and rejection synchronization:

•Flexible HMI for real-time display of inspection status, with configurable multi-level access permissions.
•Encoder-based counting and tracking, mounted on the conveyor’s synchronous motor, designed so rejection accuracy is not affected by line stoppages or conveyor speed changes.
•Industrial-grade cooling and air conditioning to help prevent system crashes or abnormal alarms during extended high-temperature operation.
•Defect traceability via automatic daily storage of defective-product images, with adjustable retention duration.
•24/7 remote access for monitoring and operation support.
•A stated unique lighting design intended to reduce the impact of natural light conditions.
•360° inkjet inspection and zero-delay inspection described as approaches to reduce nuisance rejects associated with scraping, jamming, or manual placement deviation.

For a direct product reference, see Tetra Pak Straw Pipette Detection.

Detection principle and reject control workflow

Tetra Pak Straw Pipette Detection integrates a positioning sensor, a Gigabit Ethernet digital camera, an image processor, the HMI, a control unit, and a rejector mechanism. The sequence is described as:

1.A package passes the positioning sensor, which logs the package arrival.
2.The control unit records the package ID and the real-time encoder signal.
3.The sensor triggers the Gigabit Ethernet camera to capture an image of the inkjet code and straw.
4.Images are transmitted over the network to the image processor for analysis.
5.Results are sent simultaneously to the HMI for real-time display and the control unit for rejection control.
6.If a defect signal is received, the control unit instructs the rejector to remove the identified defective package(s) without interrupting the production flow.

This encoder-based approach is presented as a practical way to keep reject timing aligned to actual conveyor movement, especially when speed fluctuates or the line stops temporarily.

Inspection and rejection workflow infographic


Algorithm principle

The inspection method is described as leveraging deep learning technology to minimize manual intervention. When switching product models on-site, approximately 300 product images are collected, and the corresponding data model is constructed so the inspection configuration can be applied across product types.

Detection items and documented inspection performance

Tetra Pak Straw Pipette Detection covers inkjet printing quality checks plus straw presence verification, with the following inspection items listed:

•Code presence, such as missing code or inverted package
•Blurred code, including distorted, illegible, or human-unreadable characters
•Incorrect code or code errors
•Missing characters
•Character recognition and decoding
•Position deviation outside a specified tolerance range
•Duplicate codes or multiple codes within the code area
•Straw presence verification for missing straw

Rejection rate and false kick rate

Inspection item / conditionRejection rateFalse kick rate
Inkjet printing inspection category—≤ 0.03%
No inkjet printing, including missing code or reversed package≥ 99.99%—
Missing or blurred inkjet printing with overall code missing greater than 50%≥ 99.99%—
Missing or blurred inkjet printing with overall code missing greater than 30%≥ 99.96%—
Incorrect inkjet printing with characters unreadable to the human eye≥ 99.93%—
Position offset, such as incorrect date, factory code, security code, or deformation≥ 99.99%—
Duplicate code exceeding the expansion zone≥ 99.99%—
Multiple codes printed within the code area≥ 99.99%—
Straw inspection with no straw≥ 99.99%≤ 0.01%

The rejection-rate figures above are presented as theoretical experimental data. The listed test items are described as being evaluated in real time for each paper package, rather than only during shift checks.

Installation location and application range

Tetra Pak Straw Pipette Detection is installed on the conveyor line approximately 0.5–1.0 meters downstream of the tube applicator, a position intended to support simultaneous checking of inkjet coding output and straw placement after application.

It is described as being widely applied on paper-packaged beverage production lines, where it inspects inkjet printing quality and straw integrity and automatically removes defective products.

In some line layouts, buyers may also review related options such as a dedicated Tetra Pak Code Inspection Machine or a standalone Straw Inspection Machine depending on how responsibilities are split across stations.

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