Patent Model of a Flatbed Cylinder Perfecting Press: Set-off Web

Description (Brief)
This patent model demonstrates an invention for a flatbed cylinder perfecting press which was granted patent number 175036. The patent dealt with perfecting presses in which the first side of a sheet was printed from type on a cylinder, and the second from a flat form. Normally slip sheets were used in such presses. This invention replaced the slip sheets with a length of tympan paper stretched between rollers, a new section being wound out for every impression. The invention was widely adopted.
Currently not on view
Object Name
patent model: press, flatbed cylinder printing
date made
ca 1876
patent date
Cottrell, Calvert B.
Physical Description
metal (overall material)
wood (overall material)
overall: 16.1 cm x 21 cm x 12.5 cm; 6 5/16 in x 8 1/4 in x 4 15/16 in
ID Number
accession number
patent number
catalog number
See more items in
Culture and the Arts: Graphic Arts
Industry & Manufacturing
Patent Models
Patent Models, Graphic Arts
Data Source
National Museum of American History, Kenneth E. Behring Center

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