One of the primary reasons for the hole in pen caps is safety. Small objects like pen caps can pose a choking hazard, especially for children. The hole in the cap allows air to pass through, reducing the risk of suffocation if the cap is accidentally swallowed. This safety feature has become a standard in pen design, following guidelines set by safety organizations to prevent choking incidents.
Reason 2: Pressure Equalization and Ink Flow
Another important reason for the hole in pen caps is pressure equalization. When a pen is capped, changes in temperature or altitude can cause pressure to build up inside the pen. The hole allows air to flow in and out, preventing pressure build-up that could cause ink to leak or flow inconsistently. This ensures a smooth writing experience and helps maintain the pen’s performance over time.
Reason 3: Manufacturing and Cost Efficiency
From a manufacturing perspective, adding a hole to the pen cap can also be a cost-effective measure. The hole reduces the amount of plastic needed to produce each cap, which can lead to savings in material costs. Additionally, the hole can simplify the molding process, making it easier and faster to produce pen caps in large quantities.
