Quoin (printing) - Misplaced Pages

Top view of a Challenge Hi-Speed Quoin, model H M47, by The Challenge Mchry Co, Grand Haven, Michigan, U.S. The hole to the right of center is for a quoin key. The quoin is about 190 mm (7.5 in) long, and 18 mm (0.7 in) tall. The width expands by about 10 points, from 17 mm (0.68 in) to 21 mm (0.82 in) as the quoin key is turned clockwise.

View of the parts of a disassembled Challenge Hi-Speed Quoin. The five wedges on the part in the foreground remain fixed, while five corresponding wedges in the background part slide when a quoin key (not shown) is inserted and turned. As the corresponding wedges move against each other, the quoin expands.

A quoin is a device used to lock printing type in a chase in letterpress printing. Quoins are pairs of wedges, facing opposite directions. A wrench or quoin key forces them together.

References

Haynes, Roscoe E. (1922). American Printer and Lithographer. Moore Publishing Company. p. 143. Retrieved 18 June 2016. This brings the quoins at the top and right end of the chase and opposite the guides to which the sheets are fed.
"Letterpress Commons". Retrieved June 18, 2016.

Letterpress printing

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Movable type	Type casting Type metal Punchcutter Matrix Wood type
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Typesetting

Manual typesetting	Type case Composing stick Sort Slug Strut Reglet Furniture Leading Quoin Chase Forme Hellbox
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Printing press

Parts of a press	Platen Frisket Tympan Bed
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Related arts: Typography; Bookbinding; Printmaking; Papermaking

Typeface anatomy	Counter Diacritics Dingbat Glyph Ink trap Ligature Rotation Subscript and superscript Swash Text figures Tittle
Capitalization	All caps Camel case Initial Letter case Small caps Snake case Title case
Visual distinction	Blackboard bold Bold Color printing Italics Oblique Underline Whitespace
Horizontal aspects	Figure space Kerning Letter-spacing Pitch Sentence spacing Thin space Word spacing
Vertical aspects	Ascender Baseline Body height Cap height Descender Mean line Overshoot x-height

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classifications

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Blackletter type	Fraktur Rotunda Schwabacher
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Specialist	Record type Display typeface script fat face reverse-contrast

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