Air blast
Fast and compact for suitable lightweight, stable packs when the required trajectory and compressed-air supply are available.
Positive non-conformance control
Underweight and overweight rejection matched to the pack
A weight result only protects production when the correct item is removed and its removal is confirmed. We select the reject principle around pack behaviour, throughput, available length and the way your quality team needs to contain and reconcile non-conforming product.
01Pack-specific reject selection
02Confirmation and bin monitoring
03Fail-safe line responses
System design
Choose the reject around risk, not habit
A reject system is dependable only when the failed product remains tracked, is removed or contained as intended, and produces the defined response after an uncertain reject.
Pusher or sweep
A positive mechanical action for cartons, tubs, bottles and other packs that can tolerate controlled side contact.
Drop flap or retracting belt
Useful for small, difficult or fast-moving packs where a downward reject path provides dependable separation.
Stop and alarm
Appropriate where automatic removal is unsuitable, space is restricted, or the process requires operator intervention before restart.
Specification
Reject integrity options
- Product tracking from weigh belt to reject point
- Sensor confirmation that the selected item entered the reject route
- Bin-present, bin-full and lock monitoring
- Air-pressure and actuator-health monitoring
- Fail-safe response after a missed or uncertain reject
- Segregation of different fault classes when required
- Controlled access and reconciliation of rejected product
Line integration
Design for the difficult condition
The fastest or heaviest product is not always the hardest to reject. Light empty packs, unstable tall containers, sticky pouches and closely pitched cartons can be more demanding. Trials should cover the complete product range, including start-up, back-to-back packs and fault recovery.
Typical applications
Underweight removalOverweight removalMetal-detection rejectsConsecutive-fault responseMissing-product conditionsUnknown or untracked product
Application-led engineeringPack handling · Weighing · Rejection · Data
Oxford Vision Systems
Combine weight with barcode, label and product verification
A shared reject route can handle weight, metal, barcode or vision faults only when each result remains associated with the correct product and reconciliation procedure.
Discuss integrated inspectionFrequently asked questions
Questions about reject systems
These answers help match reject mechanism, confirmation, containment and failure response to the actual pack and production risk.
Which checkweigher reject type is best?
There is no universal best type. Pack weight, stability, speed, pitch, available space and containment needs determine the safest reliable method.
How does reject confirmation work?
The control tracks the classified product to the reject point and expects a sensor response in a defined window. A missing response can raise an alarm or stop the line.
Can underweight and overweight packs go to different bins?
Yes, where separate reject devices or a suitable diverting arrangement are justified by your procedure and footprint.
Can the reject bin be locked?
Yes. Lockable containment and monitored access can be included for higher-control applications.
Continue your research
Related checkweighing systems
Dynamic weight inspection
In-line checkweighers
Inspect correctly presented packs at the agreed production rate, classify them against defined limits and remove non-conforming items with an application-matched reject system. We configure the weighing conveyor, controls, reject method and data outputs as one practical system.
Explore system
Two critical checks, one line section
Combination systems
Bring contaminant detection and automatic weight inspection together in a coordinated system. A combination unit can reduce footprint, simplify product transfer and provide a consistent reject and line-control philosophy while keeping the two inspection results distinct.
Explore system
Turn weights into evidence
Production data
Make weight inspection information useful beyond the machine HMI. From simple batch reports to line-level data exchange, we define the records, identifiers, retention and interfaces your production and quality teams actually need.
Explore systemPlan the complete inspection point
Related checkweigher decisions
Use the next guide that matches the engineering or quality question behind your project.
Your application, properly defined
Let’s specify the checkweigher your line needs.
Share pack details, target weights, line speed and any inspection or data requirements.