Air-blast reject
Fast, non-contact ejection for suitable lightweight packs with controlled spacing and a defined catch area.
Detection is only the first decision
Complete automatic reject system integration.
Mechanical handling, product tracking, reject actuation, verification, guarding and controls designed as one dependable production sequence.
Reliable rejection is an engineered system — not a bolt-on cylinder.
A pass/fail signal may last only milliseconds. The rejected product then travels through real production conditions: variable speed, changing pitch, vibration, accumulation and transfers. The controls must preserve product identity until a suitable mechanism removes that exact item.
Oxford Vision Systems takes responsibility for the mechanical, electrical and control interfaces within the agreed scope. We select the reject method around product behaviour, then add the monitoring and containment needed for the customer’s risk and quality process.
What we define during application review
- Product dimensions, mass, stability and centre of gravity
- Minimum and maximum line speed, pitch and speed variation
- Available inspection and reject signals
- Conveyor construction, transfers, guide rails and accumulation
- Failure mode, containment requirements and reject frequency
- Guarding, safety, hygiene and operator-access requirements
Reject mechanisms
Choose the motion that suits the real product.
There is no universally correct reject device. We select and size each mechanism using the product envelope, speed range and required fail-safe response.
Pneumatic pusher
A guided face moves cartons, containers or packs laterally into a chute, lane or secure reject bin.
Swing-arm diverter
Redirects products smoothly to a reject lane or alternate conveyor without a direct impact.
Drop-flap system
A conveyor section opens to remove compact, stable products downwards into controlled containment.
Retracting belt
Creates a controlled gap to drop a failed product while preserving flow for accepted production.
Lane-divert system
Separates failed, rework or sample products into defined lanes for downstream handling.
Fail-safe monitoring
Know when the reject happened — and when it did not.
Product identity
Sensor timing or encoder-based tracking maintains the relationship between the inspection result and physical pack.
Device feedback
Position sensing can confirm that the reject device reached its commanded state within the expected time.
Reject confirmation
A separate sensor detects the rejected product in the chute, lane or bin and closes the quality loop.
Secure reject bin
Lockable bins, access switches and controlled removal support high-care and accountable production.
Utility monitoring
Low pneumatic pressure, full-bin and sensor-health conditions can raise an alarm or stop the line.
Event outputs
Reject, fault and status data can be made available to agreed line or production systems.
Existing conveyor retrofit
Keep the conveyor. Upgrade the quality control.
Where the existing line is suitable, we add reject mechanics, sensors, guarding and control integration without replacing serviceable equipment.
Explore retrofit systems →Design resources
Make the key decisions in the right order.
Start with the product and failure consequence, then choose the mechanism, tracking method, confirmation and fault response.
Mechanism
Reject method comparison
Match product handling to air blast, pusher, diverter, flap or retracting solutions.
Compare methods →MonitoringFail-safe reject verification
Define how rejection is confirmed and what the line should do when proof is missing.
Review monitoring →ScopeCost and quotation factors
Understand the information needed for an accurate engineering proposal.
Plan the budget →Integration questions
Define the risk before the hardware.
We agree the intended quality response and system boundaries before detailed design.
Which reject mechanism should we use?+
The choice depends on product weight, stability, speed, spacing, conveyor type, failure mode and required containment. We select the method after reviewing the complete application.
What is reject verification?+
It is an independent confirmation that the expected failed product reached the reject area. A missing confirmation can cause an alarm and line stop.
Can you monitor a full reject bin?+
Yes. Bin-full sensing, access monitoring, low-air supervision and reject-device position can be included where the risk assessment requires them.
Can you integrate with our existing PLC?+
Often, yes. We define the signal interface, responsibilities, safety architecture and commissioning method with the customer and other equipment suppliers.