Why a Staple’s Underside Can Look Lopsided
A staple starts as a small strip of wire shaped into a crown with two legs. When you press a stapler, a driver pushes those legs through the paper and into a metal plate called an anvil. Grooves in the anvil curl the tips back toward the paper, holding the sheets together.
That final bend is where unevenness often appears. Each tip has to meet its groove and fold as the staple is driven. If the staple sits slightly off-center, the paper stack resists one leg more than the other, or the parts have tiny differences in shape or alignment, the two tips may curl by different amounts or in different directions.
Small Differences Become Visible Bends
The stapler’s motion is quick, but the legs are thin wire, and the clinching action is a small, precise deformation. A slight mismatch can therefore leave one prong tucked neatly inward while the other sticks farther out—or make the two bends look nearly unrelated. The staple can still hold the pages; the uneven prongs are a sign of an imperfect clinch, not necessarily a failed fastening.
The underside reveals how the stapler joined the sheets: the neat crown on top hides two separate wire legs being forced around the anvil below. A tiny difference in that brief contact can remain visible every time you turn the document over.
