Defects – Page 3 – Seam School – Craft Seaming

Cover Hook Curl

A curl in the cover hook seen during routine seam inspection is an indication of a problem. In many cases this could

More information about Cover hook. * The Coverhook is formed in the first seaming operation. The deeper the 1st operation

More information about cover hook. Possible causes for Long Cover Hook: Tight 1st operation roll Short Body Hook Countersink is too shallow (not deep

More information about Body Hook itself. Possible causes for Long Body Hook: High Base Load Low Pin Height (seamer setup)

More information about Body Hook itself. Possible causes for Short Body Hook: Low Base Load / Lifter Pressure – If the

A Sharp Seam is a typical defect when the edge of the seam appears sharp. Beyond potential harm to the

A Tight 1st Operation Roll is when the roll is set too tight (too close to the chuck). This can cause damage

When the first operation roll is too loose the first operation roll will be too open, which can ultimately lead

The tooling in the seamer needs to turn properly and smoothly. Ceramic bearings are quite strong and resilient, but can be

Damaged seaming rolls are very common and in many cases, overlooked and missed by operators since the issues (particularly in