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Belt Marks

This example lists the nonconformance name, its location, classification, definition and a photo or drawing. The photos or drawings are shown for illustration purposes only and do not represent limits for acceptance or rejection.

Content and text according PDA Glass Task Force - 2007.

Visual nonconformance

  • Name: Belt Marks
  • Location: General
  • Class: Minor

Minor classification of nonconformance: Nonconformities that do not result in or impact product quality or process capability.

Example:

Example of Belt Marks defects

Description

Impressions left on side or bottom of container from the lehr belt due to exessive heat during annealing.

Points to Consider

  • The Term “None-Allowed” should be attributed to those nonconformities that may arise out of a glassmanufacturer’s process or a non-process related error that is not sampled or estimated statistically and therefore should not be assigned an AQL.
  • Nonconformities should be reviewed and classified (with rationale) using a quality risk management approach.
  • Verification of nonconformity classifications may warrant additional testing to establish the irrationale.
  • A Limit Sample is a single container example that represents the maximum degree of acceptability of a nonconformance.

Acknowledgements

The photos or drawings are shown for illustration purposes only and do not represent limits for acceptance or rejection. Please take notice of the Acknowledgements