Confirm the reject
Where an automatic reject is used, confirm that the selected bottle was removed and that the reject container cannot return to production unnoticed.
Inspection guide
Empty bottle inspection after rinsing.
Define how the line will confirm that the rinse stage has achieved its agreed purpose before bottles enter filling.
Acceptance evidence
Inspection must be matched to the contamination risk and bottle format.
A post-rinse inspection can range from a documented manual sample check to an automated empty-bottle inspection system. The appropriate method depends on what must be detected, the bottle material and colour, the neck and base geometry, production speed, the consequence of a missed defect and the user's quality system. A clear glass bottle under controlled lighting is a different inspection task from an opaque HDPE container or a deeply shouldered bottle.
The inspection plan should separate the ability to see a condition from the ability to remove the affected bottle. A camera or operator may identify a problem, but the line must also have a controlled stop, reject or quarantine response. The status of bottles held between the rinser and filler after a fault must be defined so that unverified containers are not released by accident.
Method selection
Choose an inspection method that can demonstrate the agreed limit.
Method
Useful for
Limitations to address
Evidence to retain
Controlled manual visual check
Sample-based checks, trial comparison and low-volume work
Operator consistency, lighting, viewing time and access
Defined method, sample count, result and photographs where useful
Backlit or contrasted inspection station
Improving visibility through clear or translucent bottles
Opaque bottles, reflections, shaped bases and production speed
Approved lighting and bottle presentation settings
Automated vision or sensor inspection
Repeatable high-rate checks for defined visible conditions
Detection feasibility, false accepts/rejects, format setup and validation
Challenge samples, reject confirmation and recipe records
Periodic destructive or laboratory check
Conditions not reliably visible on-line
Sampling representativeness and delayed feedback
Quality procedure, traceability and escalation rules
Line response
Connect inspection results to a controlled bottle route.
Protect the handover
Define the maximum number of bottles between the rinse/inspection decision and the filler so the affected batch can be contained after a fault.
Retain useful records
Record format, settings, inspection result, alarm and intervention information at the level required by the user's quality system.
Contamination risk assessment
Define what the inspection is expected to find and the consequence of a miss.
Controls and interlocks
Plan bottle status, stop/reject behaviour and fault recovery.
Bottle rinser line integration
Review inspection, conveying and filler handover as a complete sequence.
Send challenge samples and the required acceptance method.
The most useful enquiry states what must be found, how bottles are presented, the line rate and what should happen after a failed check.