SOP — Seamer Rolls Setup & Seam Check¶
FUERST WIACEK Version 1.0 | Packaging — canning line | Frequency: when adjusting seamer rolls; per packaging run seam check
Purpose¶
Correct seamer roll settings are critical for a consistent, hermetic double seam. This SOP covers seamer roll setup and the seam measurement procedure used to verify roll settings and monitor seam quality during packaging.
Reference Spreadsheet¶
All measurements, calculations, and setup parameters are managed in the Seamer Rolls Spreadsheet.
The spreadsheet has four tabs:
| Tab | Purpose |
|---|---|
| Measurements | Raw measured values from seam teardowns |
| Calc Seam Thickness | Calculated seam thickness from raw measurement data |
| Seamer Setup | Roll gap settings and setup parameters |
| Reading | Reference guide — how to read and interpret measurements |
Seam Parameters¶
The following parameters are measured during a seam teardown:
| Parameter |
|---|
| Countersink Depth |
| Seam Thickness |
| Seam Length |
| Body Hook |
| Cover Hook |
| Overlap |
| Body Hook Butting % |
| Seam Gap |
| Free Space |
| Finished Can Height |
| Thickness % |
Statistical analysis is calculated automatically: n, xq (mean), min, max, range, sigma, Cp, CpK, OG/UG limits.
Seam Check Procedure¶
Refer to the Reading tab in the spreadsheet for a full guide on interpreting each parameter and its acceptable range.
- Pull a can from the line during stable production.
- Perform a seam teardown — separate the seam and measure each parameter.
- Enter raw values into the Measurements tab.
- Review calculated values in the Calc Seam Thickness tab.
- Check Cp and CpK against the OG/UG limits. Values outside limits require roll adjustment.
- If adjustment is made, pull another can and repeat the check.
Checklist¶
- [ ] Can pulled at stable production
- [ ] Seam teardown performed
- [ ] All parameters measured and entered into Measurements tab
- [ ] Calc Seam Thickness tab reviewed
- [ ] Cp / CpK within OG/UG limits
- [ ] If out of spec: rolls adjusted, seam re-checked