Difference between revisions of "Spirit duplicator"
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== Description == | == Description == | ||
| − | A low-volume duplicating machine invented in 1923 by Wilhelm Ritzerfeld. Spirit duplicators, more commonly known as ditto machines, use a two-ply master copy. The master was typed or written on, then the waxed surface of the second sheet was placed on a drum. The drum was alternately rolled through an ink bed then a blank printing page. Most ditto machines were replaced by [ | + | A low-volume duplicating machine invented in 1923 by Wilhelm Ritzerfeld. Spirit duplicators, more commonly known as ditto machines, use a two-ply master copy. The master was typed or written on, then the waxed surface of the second sheet was placed on a drum. The drum was alternately rolled through an ink bed then a blank printing page. Most ditto machines were replaced by [[xerography|xerographic]] copiers by the early 1980s. See also [[mimeograph%20paper|mimeograph]]. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 12:30, 10 May 2016
Description
A low-volume duplicating machine invented in 1923 by Wilhelm Ritzerfeld. Spirit duplicators, more commonly known as ditto machines, use a two-ply master copy. The master was typed or written on, then the waxed surface of the second sheet was placed on a drum. The drum was alternately rolled through an ink bed then a blank printing page. Most ditto machines were replaced by xerographic copiers by the early 1980s. See also mimeograph.
Synonyms and Related Terms
ditto machine
Sources Checked for Data in Record
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Spirit_duplicator (accessed Nov. 30, 2004)