Flexible and tray packs
- Heat-seal inspection
- Tray-seal inspection
- Pouch-seal inspection
- Missing lidding film
- Folded or wrinkled seals
- Seal-width and continuity checks
Inspect seal condition before packs leave the line
Seal Inspection Systems
Detect visible seal contamination, folds, wrinkles, missing lidding film and closure faults with inspection engineered around the material and seal geometry.
Seal inspection
Make the defect visible, then make the decision repeatable
Seal inspection is optically demanding: films are reflective, products vary, and contamination can resemble print or texture. We select camera angles, illumination and analysis methods from real samples, then integrate the outcome with rejection and line monitoring.
Seal-area coverageContamination detectionVerified failed-pack rejection
Inspection scope
What the system can cover
Each check is configured against agreed samples, tolerances and fault responses. Multiple checks can be combined into a single inspection recipe.
Defect detection
- Contamination in the seal
- Product trapped at the edge
- Misaligned film
- Torn or damaged film
- Incomplete visual seal features
- Pack deformation
Closures and evidence
- Tamper-evident seal inspection
- Induction-seal presence
- Cap and closure integrity
- Band and ring presence
- Automatic rejection of failed packs
- Result and image recording
Typical products and formats
Thermoformed traysPreformed traysStand-up pouchesSachetsFlow-wrapBottlesJarsTubs
Production-line integrationOptics, handling, controls and rejection designed as one system.
Engineering priorities
What turns an inspection into a dependable production station
- 01
Define which visible conditions correlate reliably with unacceptable seals
- 02
Use representative products, films, print variants and contamination samples during trials
- 03
Avoid claiming detection of hidden seal strength where no visible evidence exists
- 04
Control film glare and transparent-layer reflections with the optical arrangement
- 05
Coordinate inspection timing with sealing machine indexes and pack spacing
- 06
Reject failed packs into a monitored bin or controlled lane appropriate to the risk
From samples to sign-off
A controlled route from question to production
We reduce risk early by proving the inspection on representative products before final hardware, handling and controls are committed.
Define
Agree the pack, defect, speed, reject risk, data needs and acceptance criteria.
Prove
Run feasibility tests using representative good, bad and borderline samples.
Engineer
Design handling, cameras, lighting, controls, guarding and rejection as one station.
Integrate
Build, validate, install, train and support the system in production.
Useful starting evidence:Product drawingsGood and failed samplesLine videoTarget outputAvailable layout
Questions answered
Seal inspection FAQs
Need an answer for your exact product or line? Send us the application details and we will identify the next useful test.
Ask an application questionCan vision prove seal strength?
Vision can inspect visible features and defects, but it does not directly measure hidden bond strength unless a validated visual characteristic correlates with it. Destructive or specialist integrity testing may still be required.
Can the system detect food contamination in a tray seal?
Often it can detect visible product in the seal area. Detection depends on contrast, film print, contamination size, product variation and whether the area is optically accessible.
Can clear lidding film be inspected?
Yes, with suitable lighting and references, though clear reflective films require careful sample trials. The system can check presence, position and certain visible defects.
Can induction-seal presence be checked after capping?
Options depend on the container and closure. Vision may detect visible evidence; other sensors can be integrated where the foil is hidden and a different physical principle is needed.