FS03.00
Revision I
Published on: 29/11/2017
Glass manufacturing controls for vacuum lug and press-on finishes
Scope of application
This fact sheet gives requirements and controls to be observed during glass manufacture to help ensure the optimum performance of containers with Vacuum Lug and Press-on closure systems. These are in addition to the dimensional and other requirements within existing national and international standards. These are essential for proper and effective sealing of containers with vacuum lug and press-on finishes.
Table of contents
1. Scope
2. Finish diameters
2.1. ‘E’ Diameter - Root diameter of a finish
2.2. ’T’ Diameter - Outer thread diameter of a finish
2.3. ‘B’ Diameter - Bead diameter of press-type finishes
2.4. General for Flat, Helix and Press type finishes
3. Finish threads
3.1. ‘K’ dimension
3.2. ‘L’ dimension
3.3. Cam-off point ‘X’
2. Finish diameters
2.1. ‘E’ Diameter - Root diameter of a finish
2.2. ’T’ Diameter - Outer thread diameter of a finish
2.3. ‘B’ Diameter - Bead diameter of press-type finishes
2.4. General for Flat, Helix and Press type finishes
3. Finish threads
3.1. ‘K’ dimension
3.2. ‘L’ dimension
3.3. Cam-off point ‘X’
3.4. Pick-up distance
3.5. Stops - Stop faces / Flat finishes
3.6. Thread profile
3.7. Thread pitch - Helix finishes
4. Sealing surface
4.1. Width of sealing surface (including transition radii)
4.2. Irregularities of sealing surface
4.3. Deviation from the flatness of the sealing surface
4.3.1. Definition
4.3.2. Measuring operation
4.3.3. Tolerances
5. Glass container measurements
5.1. Non-parallelism of top of finish
5.1.1. Definition
5.1.2. Measuring operation
5.1.3. Tolerance - parallelism (Tp)
5.2. Height variation between containers
5.2.1. Definition
5.2.2. Measuring operation
5.2.3. Tolerance - Height (Th)
5.3. Lean and eccentricity
5.3.1. Definition
5.3.2. Measuring operation
5.3.3. Tolerance
6. Glass surface coating
6.1. Hot-end coating
6.1.1. Definition
6.1.2. Measuring operation
6.2. Cold-end coating
6.3. Specifications and recommendations
7. Annex A
8. Documents in reference
8.1. Cetie
?9. Data sheet history
3.5. Stops - Stop faces / Flat finishes
3.6. Thread profile
3.7. Thread pitch - Helix finishes
4. Sealing surface
4.1. Width of sealing surface (including transition radii)
4.2. Irregularities of sealing surface
4.3. Deviation from the flatness of the sealing surface
4.3.1. Definition
4.3.2. Measuring operation
4.3.3. Tolerances
5. Glass container measurements
5.1. Non-parallelism of top of finish
5.1.1. Definition
5.1.2. Measuring operation
5.1.3. Tolerance - parallelism (Tp)
5.2. Height variation between containers
5.2.1. Definition
5.2.2. Measuring operation
5.2.3. Tolerance - Height (Th)
5.3. Lean and eccentricity
5.3.1. Definition
5.3.2. Measuring operation
5.3.3. Tolerance
6. Glass surface coating
6.1. Hot-end coating
6.1.1. Definition
6.1.2. Measuring operation
6.2. Cold-end coating
6.3. Specifications and recommendations
7. Annex A
8. Documents in reference
8.1. Cetie
?9. Data sheet history
History
First edition: 01/1996
Revision I 11/2017
First edition: 01/1996
Revision I 11/2017
Contributors
AH CONSULT, ARDAGH, BA GLASS, BRITISH GLASS, ENCIRC GLASS, KD CONSULT, O-I MANUFACTURING, SAVERGLASS, VERALLIA, VETROPACK, VIDRALA, WIEGAND-GLAS.
Document under responsibility of working group:
Glass wg1+4
WG chair: Arnaud JANIN - VERALLIA FRANCE
This permanent group is dedicated to a wide range of topics downstream of the production of glass bottles and jars dedicated to the food and beverage industries:
- Surface treatments, marking, labelling;
- Testing methods (impact, headspace, internal pressure, etc.);
- Nomenclatures (of finishes, jars, bottles, and visual defects, etc.);
- Quality management (food and beverage safety, best practices, regulations).
