Can & Jar Closure Inspection for Food Manufacturers
Closure and seal integrity address a different question than foreign material inspection. X-ray is designed to find what’s inside the container, while closure inspection is designed to evaluate the container itself — whether vacuum seals are intact, closures are functioning, and internal pressure is within expected range.
When product is already packaged and needs reinspection, in-line dud detection equipment isn’t always a practical option. FlexXray provides third-party closure inspection for product that has moved past the production line.
What Closure Inspection Identifies
FlexXray can help identify seal and enclosure failures that aren’t visible to the naked eye, including:
- improper vacuum seals
- failed pop tops and other closure types
- swells
- packaging validation issues
Contaminant: Glass
Contaminant: Gasket
Contaminant: Stone
How the Process Works at FlexXray
When product arrives at a FlexXray facility, it moves through inspection in bulk without being reopened and individually handled. Multi-head units inspect multiple containers simultaneously, often in their original trays, which preserves packaging integrity and significantly reduces the time and labor involved in reinspection. Whether the concern is internal pressure, seal integrity, or enclosure performance, the process is designed to move product efficiently and return it ready for distribution.
PRODUCT ARRIVES
BULK HANDLING
MULTI-HEAD INSPECTION
DOCUMENTATION / RELEASE
When Third-Party Closure Inspection Makes Sense
Food and beverage manufacturers most commonly send us product for this type of inspection in one of the following scenarios.
Production Anomalies
A suspected sealing issue, an equipment irregularity, or an out-of-spec run where the scope of the problem isn’t clear. When internal reinspection capacity is limited or the volume exceeds what your product line can absorb without disrupting normal operations, third-party inspection is a practical alternative.
Pre-Packaged and Stored Product
Non-perishable canned and jarred product sometimes sits in controlled holding for an extended period while a disposition decision is worked through. Third-party closure inspection provides an independent verification layer to support that decision with documented results.
High-Volume Recall or Hold
If a production run is flagged late or a hold has grown as investigation continues, the throughput available at a third-party facility like FlexXray’s can outpace what a manufacturer’s line can realistically handle.
Related Inspection Services
Closure inspection and X-ray inspection are often run together when a hold involves questions about both the container and its contents. A production issue that raises seal integrity concerns may warrant foreign material inspection as well, and running both at the same facility reduces handling, transit time, and the coordination overhead of working with multiple vendors. If product needs to be repackaged after inspection, FlexXray’s repacking and rebundling services are available.
FAQs
Closure inspection evaluates the integrity of a container’s seal and enclosure rather than its contents. It identifies failure modes like improper vacuum seals, failed pop tops, swells, and other packaging issues that indicate a container hasn’t closed or pressurized correctly.
X-ray inspection is designed to detect foreign material inside a product. Closure inspection evaluates the container itself: whether seals are intact, closures are functioning, and internal pressure is within expected range. The two services address different QA questions and are often used together when a hold involves both concerns.
Dud detection is the industry term for the process of identifying containers with seal or closure failures — cans or jars that didn’t close, seal, or pressurize correctly during production.
Yes. FlexXray’s multi-head units are designed for bulk inspection and can process product in original packaging trays in most cases.
