# Can you double seam inspection?

## Can you double seam inspection?

Visually inspecting the external double seam is a valuable tool in maintaining double seam quality. In food canning processes, visual inspection of each container is performed from each seaming station at least every 30 minutes. In practice, visual inspections identify 80% to 90% of seam quality problems.

## How do you calculate double seam overlap?

Calculated Overlap = Body hook + end hook + end plate thickness – seam length. To determine the theoretical overlap, an adjustment factor is added to the calculated overlap.

What is the important inspection of can double seaming?

INSPECTION OF THE DOUBLE SEAM Normally three points around the can are notched and checked. A visual inspection can reveal many flaws in the seam including overlap, the body and cover hook lengths, and the verification of proper mating of the parts.

### Can double seam defects?

DESCRIPTION: A portion of the body flange which is torn or cut with part of the flange turned back against the can body, without being engaged with the end hook, and may protrude below the bottom of the normal seam. Severe forms of this defect result in a hole in the can body just below the double seam.

### What is purpose of determining the tightness rating of the double seam?

Tightness is is what is evaluated during Wrinkle rating. It is a measure of how tightly the seam has been compressed by the 2nd operation roll. It is recommended to evaluate the entire cover hook of the seam intact but in most cases, the rating is done after on a stripped cover hook after it has been cut at least once.

What is the purpose of determining the tightness rating of the double seam?

#### Can seaming defects?

A visual seam defect is a type of defect which you can see outside of a can’s seam. Visual seam defects include cut seam, droop, false seam, incomplete seam, cut-over, sharp seam, and vee. A packager should inspect visual seam defects on a can before starting the packaging process.

#### How is seam thickness measured?

How to measure Seam Thickness?

1. Seam micrometer – a seam micrometer is not a very accurate tool, it is highly recommended not to use this type of tool these days.
2. A fixed angle Seam Thickness Gauge – this type of gauge is essentially a micrometer (digital or analog) that is set at a particular angle.

Can a seam be inspected?

In food canning processes, visual inspection of each container is performed from each seaming station at least every 30 minutes. The inspector is looking for deviations in the double seam as she traverses around the seam. In practice, visual inspections identify 80% to 90% of seam quality problems.

## How many interlocking thicknesses of metal make up a double seam?

The double seam (Fig. 1) consists of 5 thicknesses of plate (7 thicknesses at the juncture of end and side seam for 3-piece soldered cans, and 6.3-6.4 thicknesses at the juncture for welded cans) interlocked or folded and pressed firmly together, plus a thin layer of sealing compound.

## How does the double seam inspection tool work?

This tool accurately and efficiently cuts the Double Seam and then separates the Cover Hook from the Body Hook in one fast, safe, teardown operation that does not damage or distort the Cover Hook. The Automatic Seam Stripper dramatically reduces teardown tome so more frequent inspections can be performed with teardown inspection systems.

How often are double seams measured by seammate?

Internal dimensions of double seams for each seamer head are measured and recorded at least every 4 hours. SeamMate walks the operator through the specified double seam measurements: Seam Thickness, Countersink, precision video measurements of Seam Height, Body hook, Cover hook and Overlap.

### What kind of material is used for double seams?

Materials used today range from paper to plastics to aluminum and of course steel. The combination of materials used today to form a can with a cover, is endless. Therefore, we intend to provide basic knowledge and skills to recognize a safe, secure and properly formed double seam on a can regardless of the materials used.

### How are seam inspections used in the workplace?

In practice, visual inspections identify 80% to 90% of seam quality problems. The SeamMate® System records and tracks precision internal double seam measurements, helping the quality assurance and maintenance staff maintain, predict and ensure double seam quality.