A quoin is a device used to lock printing type in a

chase Chase or CHASE may refer to: Businesses * Chase Bank, a national American financial institution * Chase UK, a British retail bank * Chase Aircraft (1943–1954), a defunct American aircraft manufacturer * Chase Coaches, a defunct bus operator in ...

letterpress Letterpress printing is a technique of relief printing for producing many copies by repeated direct impression of an inked, raised surface against individual sheets of paper or a continuous roll of paper. A worker composes and locks movable t ...

printing. Quoins are pairs of

wedges A wedge is a triangular shaped tool, a portable inclined plane, and one of the six simple machines. It can be used to separate two objects or portions of an object, lift up an object, or hold an object in place. It functions by converting a for ...

, facing opposite directions. A wrench or quoin key forces them together.

References

Letterpress printing Relief printing {{Typ-stub