For the control and documentation of a faultlessly performed sealing process and the correct
condition of the closed packages there is the possibility of various visual and measurement
checks.
06-3.1 CLOSURE LUG SEAT
Visual check, measurement - assessment, whether the lugs are positioned under the
thread and not deformed or the closure lug was adequately tightened on the thread (see also
Fig 06-1 / Correct cap seat).
− In the case of FLAT type finishes, for a correct cap seat it has to be assessed whether
the closure lug is positioned under the horizontal part of the thread of the glass container
finish. If the closure lug is not under the horizontal part of the thread (e.g. a closure
hanging at the start of the thread), the closure seat is not in accordance with the requirements.
− In the case of HELIX type finishes (TO53 - TO110) the position of the lugs is determined
by the distance between the parting line on the finish and the start of the closure lug
(parting line - lug distance). On every finish there are two visible vertical lines (parting
line = form seam). If the closure lug is to the left of the parting line, a stripped closure with
excessively extended closure lug is possible. The package is then not securely closed. A
proper closure seat is reached, if the closure lugs are to the right of the parting line
and the directives for the security values referred to in chapter 06-3.3 Security Measurement
are followed.
For the control and documentation of a faultlessly performed sealing process and the correct
condition of the closed packages there is the possibility of various visual and measurement
checks.
06-3.1 CLOSURE LUG SEAT
Visual check, measurement - assessment, whether the lugs are positioned under the
thread and not deformed or the closure lug was adequately tightened on the thread (see also
Fig 06-1 / Correct cap seat).
− In the case of FLAT type finishes, for a correct cap seat it has to be assessed whether
the closure lug is positioned under the horizontal part of the thread of the glass container
finish. If the closure lug is not under the horizontal part of the thread (e.g. a closure
hanging at the start of the thread), the closure seat is not in accordance with the requirements.
− In the case of HELIX type finishes (TO53 - TO110) the position of the lugs is determined
by the distance between the parting line on the finish and the start of the closure lug
(parting line - lug distance). On every finish there are two visible vertical lines (parting
line = form seam). If the closure lug is to the left of the parting line, a stripped closure with
excessively extended closure lug is possible. The package is then not securely closed. A
proper closure seat is reached, if the closure lugs are to the right of the parting line
and the directives for the security values referred to in chapter 06-3.3 Security Measurement
are followed.
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