Packaging line sequence
Choose the label point from the condition of the real pack, not from a generic line diagram. Bottle rigidity, surface cleanliness, temperature, closure geometry and inspection all affect the result.
Direct answer
There is no universal rule that every bottle should be labelled empty, immediately after filling or only after capping. Empty containers may offer a clean surface but can be flexible or unstable. Filled containers may travel more consistently but can reach the labeller warm, damp or contaminated. The final sequence should be confirmed with the real product, closure, label material and production conditions.
| Before filling | Can protect the label area from filling splash, but the empty pack must remain stable and the label must tolerate later filling, capping and handling. |
|---|---|
| After filling, before capping | May be considered only where the process and risk assessment support open-container transfer. Check spillage, closure absence and hold-down access. |
| After filling and capping | The pack is sealed and may be more stable, but the label panel must be dry, clean and at a suitable production condition. |
| After rinsing, drying or cooling | Use an acceptance point at the actual labeller to confirm that residual moisture, condensation or temperature will not undermine application. |
Decision factors
Some lightweight plastic bottles are easier to control after filling; others deform under side belts or wipe-down pressure when filled. Test the production condition rather than assuming added weight always improves the result.
Product splash, rinsing water, oil, dust, condensation or handling residue can reduce adhesion or create visible defects, especially under clear film labels. Inspect the usable front and back panels at the label point.
Product and container temperature can change between filling and labelling. Record the normal dwell and conveyor journey so the trial reproduces the pack condition that the adhesive will see.
A cap, pump, trigger or overhanging closure can improve pack completeness but obstruct a top hold-down or guide. The labeller layout must be reviewed with the actual fitted closure.
Where a barcode, batch code or label-presence check is required, the chosen sequence must leave enough conveyor length and preserve the identity of each pack through inspection and rejection.
The selected arrangement must fit the site's hygiene, guarding, access and risk-assessment requirements. General guidance cannot replace an application-specific engineering and safety review.
Production evidence
A dry empty sample can prove that a label head dispenses, but it does not prove the complete production process if the real bottle arrives filled, capped, warm or recently rinsed. The trial brief should reproduce the variables that can change handling and adhesion.
Line controls
| Upstream release | Define how packs are spaced and what happens when the labeller stops or cannot accept another product. |
|---|---|
| Conveyor transfer | Check height, direction, dead plates, side guides and the distance available for the pack to settle before both label heads. |
| Coder trigger | Confirm whether variable print is added to the label web or to the finished pack and how the correct job is selected. |
| Inspection and reject | Define the defect, inspection point, pack tracking, reject method and reject confirmation. |
| Downstream contact | Allow enough time and controlled handling so newly applied labels are not scuffed, lifted or displaced before packing. |
Buyer questions
No. Added weight can improve stability, but a filled bottle can also flex, bulge, arrive wet or carry product residue. Accuracy depends on the complete pack, product-control method and surface condition at the application point.
It can only be confirmed after checking splash, condensation, temperature, bottle settling and conveyor transfer. If the usable panel is not clean and stable, extra dwell, wiping, drying or a different sequence may be required.
Yes. A cap, pump or trigger can change the centre of gravity, container height and the space available for top hold-down or guides. Trials should use the fitted production closure where it is present at the labeller.
Use the condition that represents production, plus any credible worst-case format. Where safe sample product is not available, agree a representative fill weight and explain what the substitute does and does not prove.
The cause and amount of moisture should be controlled before acceptance. A bottle may need extra drain time, drying or a different label point. Label material and adhesive suitability should also be confirmed with the label supplier.
Possibly, but moving the labeller changes conveyors, controls, access, pack condition and inspection timing. Future options should be considered in the original layout rather than assuming the machine can be relocated without requalification.
Tell Lancing whether the bottle reaches the labeller empty or filled, capped or uncapped, dry or recently rinsed, and how it connects to the surrounding equipment. That information makes the machine and trial recommendation more reliable.