Double end - Metal can defects

Double end - Metal can defects - Coating defects

Figure 1: Double end.

Defect name: Double end
Record No.: 1494
Type of defect (Internal/Surface): Surface
Defect classification: Coating defects, metal can defects
Steel name: Steel
Steel composition in weight %: No data.
Note:
Classification: A double end is considered a serious container defect.
Description: Two ends are seamed onto one end of a can body. The double seam has the appearance of additional thickness and length, and may have numerous droops or vees along the double seam.
Common sources: 1. Two strips of end plate are stuck together as they enter the end press. The resulting ends have two thicknesses of plate that are curled together and only the inner end is compound lined. 2. Two independently formed ends are stuck together and double seamed onto a body.
Reference: Not shown in this demonstration version.