Packaging Crash Course - O.Berk
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Plastic Bottles and Glass Bottles Neck Finish Dimensions

Plastic Bottles and Glass Bottles Neck Finish Dimensions

Neck Dimensions

H......Dimension: The height of the neck finish. Measured from the top of the neck to the point where the diameter "T" extended down, intersects the shoulder.

S......Dimension: Measured from the top of the finish to the top edge of the first thread. The "S" dimension is the key factor which determines the orientation of the closure to the bottle and the amount of thread engagement between the bottle and cap.

S1......Dimension: Measured from top of finish to the bottom of the thread at the start of full thread profile.

I......Dimension: The inner diameter of the bottle neck. Specifications require a minimum "I" to allow sufficient clearance for filling tubes. Linerless closure, with a plug or land seal, and dispensing plugs and fitments require a controlled "I" dimension for a proper fit.

C......Dimension: The opening control diameter at the top of the finish.

T......Dimension: The outside diameter of the thread. The tolerance range of the "T" dimension will determine the mate between bottle and closure.

E......Dimension: The outside diameter of the neck. The difference between the "E" and "T" dimensions divided by two determines the thread depth.

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Posted by Jonathan
on 01/01/2009
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