Direct answer
T‑corking terminology should describe the actual bottle, closure, machine function and acceptance result. Terms such as shank diameter, insertion depth, finished height, bottle-neck bore, escapement and chuck have practical consequences for tooling, sample trials and sustained output.
Closure and bottle terms
| Term | Meaning in a T‑cork project |
|---|---|
| T‑cork or bar-top closure | A closure with a visible top and a shank that enters the bottle neck. Buyers may use the terms T‑cork, T‑top, bar-top or stopper differently, so samples matter. |
| Shank diameter | The diameter of the closure portion that enters the bottle neck. It must be assessed against the internal bottle-neck profile, not just the nominal bottle size. |
| Bottle-neck bore | The internal opening and profile of the bottle neck. Variation through depth and between supplier batches can affect insertion and retention. |
| Finished height | The accepted visual height of the closure after insertion, normally assessed at the top or seating position defined by the pack standard. |
| Insertion depth | The amount the closure shank is pressed into the neck. It should be measured consistently and linked to the accepted finished appearance. |
Machine and feeding terms
| Term | Meaning in the machine specification |
|---|---|
| Feeder | The system that presents closures to the machine. It may be manual, magazine-based, rail-fed, bowl-fed or configured around the closure geometry. |
| Bowl sorter | A feeder that uses controlled vibration and tooling to orient closures before transfer. Suitability depends on closure shape, weight and finish. |
| Escapement | The mechanism that releases one closure at the correct point in the cycle. Poor escapement control can create double-feed, no-feed or tilted insertion faults. |
| Chuck or press tool | The tooling that contacts the closure during insertion. It must support the closure without damaging decorative tops or allowing the shank to enter at an angle. |
| Bottle support | The base, side, neck or format support that holds the bottle in position under the press head. |
| Accepted good output | The number of bottles that pass the agreed finished-height, appearance, retention and handling checks, not merely the machine’s isolated cycle count. |
Common terminology questions
Is a T‑cork the same as a bar-top closure?
The terms are often used for similar decorative closures with a top and a shank, but suppliers and buyers may not use them identically. For machinery specification, the actual samples, dimensions, material and required finished appearance are more important than the name used in the enquiry.
Is finished height the same as insertion depth?
Finished height and insertion depth are related but not identical. Finished height is the visible accepted result after pressing; insertion depth describes how far the closure is driven into the bottle neck. A project should define how both are measured and when they are inspected.
What is an escapement on a T‑corker?
An escapement controls the release of individual closures from the feeder or rail into the press sequence. It helps prevent double feeding, missing closures and poorly timed presentation. The escapement must match the closure geometry and the line’s stop-start behaviour.
Use the glossary with the practical guides
After defining terms, check the measurement guide, the finished-height guide and the feeder jam-prevention guide.