Spacing
Create enough separation to remove one failed pack without taking a good pack with it.
Flexible-pack inspection and removal
Automatic reject systems for pouches, sachets and bags.
Reliable removal after checkweighing, metal detection, X-ray, seal, date-code or vision inspection—engineered around pack presentation and line speed.
Direct answer
How are failed pouches removed automatically?
Light, well-spaced pouches can often be rejected by air blast; heavier or less predictable packs may need a pusher, sweep, drop flap or retracting conveyor section. The design must account for pack overlap, film movement, product distribution and adjacent-pack disturbance.
The least favourable pack condition should be tested—not only the neat sample presented during specification.
Format and method
| Pack format | Typical inspection | Reject starting point | Critical checks |
|---|---|---|---|
| Small sachet | Weight, code, seal or vision | Air blast or drop flap | Low mass, flutter, overlap and product gap |
| Premade pouch | Checkweigher, metal detector, X-ray | Air blast, pusher or sweep | Base stability, fill distribution and top seal |
| Flow wrap | Metal detector, code, seal or vision | Air blast, pusher or drop section | Film friction, length, speed and product fragility |
| Large bag | Weight, metal detection or X-ray | Sweep arm or lane diversion | Mass, belt width, centre of gravity and recovery space |
Flexible-pack risks
Design around the pack in motion.
Presentation
Allow for rotation, curl, overlap and uneven product distribution inside the film.
Timing
Track the inspection decision through conveyor speed changes to the reject point.
Containment
Control the reject route so flexible packs cannot bounce or escape the collection area.
Hygiene
Select construction, belt, access and cleaning features for the production environment.
Combined inspection and rejection.
A pouch line may include a metal detector, checkweigher and vision check in sequence. Oxford Vision Systems can define how each result is tracked, whether faults share a reject station, how rejected packs are identified and what happens if removal is not confirmed.
What to send for an initial review
Provide pack dimensions and weights, film type, speed range, minimum gap, expected reject frequency, inspection-machine details, conveyor photos, floor-space constraints and a production video showing normal variation.
Common questions
Flexible-pack reject answers.
Product samples and production video help identify presentation risks early.
Is air blast always best for pouches?+
No. It suits some lightweight, well-spaced products, but pack mass, overlap, open product and containment can favour a mechanical or drop-through method.
Can a pusher damage a pouch?+
It can if the contact face, speed or product support is wrong. Trials establish whether positive side transfer is suitable.
Can one rejecter handle several pouch sizes?+
Often, with recipe timing and adjustable guides, provided the complete size and weight range remains inside the proven operating envelope.
Can the line stop if the reject bin is full?+
Yes. Bin-full, door-open, low-air and reject-position monitoring can be included in the fault strategy.