Flexible packaging inspection

Pouch inspection for seals, print and pack presentation

Flexible packs move, crease and reflect differently from rigid packaging. Our pouch inspection systems stabilise the presentation, control illumination and focus each inspection on the seal, artwork, code or feature that determines acceptance.

Discuss this application Call 01865 416657

Inspection overview

Reliable decisions on variable flexible packs

Pouches can be inspected flat, supported, hanging or standing, depending on the pack and line. The best camera geometry is chosen with the conveyor, bag maker or pouch filler so critical areas remain visible and consistently presented.

Visual checks can identify seal-area contamination, incomplete visible seal patterns, missing or poor codes, incorrect artwork, gross deformation and orientation errors. Where an invisible leak must be found, vision can work alongside dedicated seal-integrity or leak-testing equipment.

Seal + printCombined checks

Flat / uprightPresentations

Visible defectsInspection scope

Checks that can be combined

The final inspection set is selected from the visible features, risk, product presentation and achievable image resolution.

Pouch presence and orientation
Top, side or fin seal appearance
Visible product contamination in the seal area
Print registration and correct artwork
Date, lot, barcode and 2D code verification
Tear notch, zipper or feature presence
Gross pouch profile and edge defects
Pass/fail tracking to the reject station

Application details we review

Early clarity on these points helps avoid false rejects, blind spots and mechanical changes late in the project.

Gloss, metallic film and transparent windows
Pouch movement, curl and presentation
Seal width and smallest visible defect
Print variation and artwork changeovers
Single packs, multipacks or linked pouches
Required reject method and pack containment

Stabilise, illuminate, inspect and reject

The pouch handling is evaluated with the optics because stable presentation is essential for repeatable seal and print inspection.

Feasibility work establishes the camera view, lens, light, exposure and image-processing approach. We then define the enclosure, conveyor changes, controls, operator interface and rejection needed for production.

Explore by industry

Food, beverage, pharmaceutical, cosmetics, chemical and household, and contract packing applications.

How we deliver

From feasibility to supported production

Inspection performance depends on the complete cell, so optics, mechanics, controls and rejection are developed as one project.

Define

Products, defects, speeds, environment and acceptance criteria.

Prove

Sample imaging, lighting trials and achievable defect limits.

Integrate

Mechanical design, guarding, PLC, recipes and reject tracking.

Support

Commissioning, operator training and production handover.

Pouch inspection questions

Technical questions, answered clearly

Can vision prove that a pouch is leak-tight?

Vision can assess visible seal features and contamination, but it cannot prove every microscopic or internal leak. Critical leak detection may require a complementary pressure, vacuum or other seal-integrity test.

Can reflective foil pouches be inspected?

Yes, with carefully controlled lighting, exposure and sometimes polarisation. Trials confirm whether the required defects remain distinguishable across acceptable material variation.

Can the system read date codes on moving pouches?

Yes, where the print is visible, stable and has enough contrast. OCR or OCV can check presence, format and selected characters, while code readers can verify barcodes and 2D codes.

How are bad pouches rejected?

Suitable methods include air blast, pusher, drop flap, retracting belt or diverter. Pack weight, speed, spacing and containment determine the right method.

Can several pouch recipes be stored?

Yes. Recipes can control inspection regions, tolerances and camera parameters, subject to controlled operator access and validated changeover procedures where required.

Start with the product and defect

Define a practical inspection concept

Send us the pack formats, line speed, available space and the defects you need to catch. Samples and images are especially useful.

Discuss your application

Call Oxford Vision Systems01865 416657Email our sales teamsales@oxfordvisionsystems.co.uk

Manufacturer product photographs: Zebra machine vision camera from the VS70 product family. Equipment examples; application-specific optics, controls and suitability are assessed separately.