Boston crucible press
The Boston press is a hand, foot, or motorized platen printing press for book printing . In the Boston crucible, a pressure crucible (T) swings around a shaft and at the pressure point it folds against a fixed, vertical foundation (F) that carries the printing form . Therefore, in contrast to the compulsorily parallel aligned gally crucible , the printer must ensure uniform printing over the entire form by means of precise alignment of the elevator and exact pressure setting . The principle of the crucible with a fixed vertical foundation was developed in Boston by J. Golding around 1850. Previously, in Boston as well, Isaac Adams had invented a press with a freely oscillating crucible that worked against a horizontal foundation in 1830 . He patented this machine on March 2, 1836 with a transmission drive for steam power.
The Boston platen has become the most successful platen printing machine. The market leader in this segment alone, Heidelberger Druckmaschinen, states in 2000 that around 400,000 of its pans are still running worldwide, although production ended in 1985.
The most important representatives of this construction principle are
- the original Heidelberg crucible (OHT)
- Platen printing press Diamant from Hogenforst, Leipzig
- "Tip-Top" from the Johne factory, Bautzen
Other crucible presses
swell
- ↑ Heidelberger Druckmaschinen AG (accessed on August 1, 2007)
Web links
Mimicry of a hand-operated Boston jar - scheme and film
literature
- Jakob Bass (ed.): The book printer. Handbook for printers and allied trades. Plesken, Stuttgart 1930.
- Friedrich Bauer: Handbook for book printers . Klimsch & Co , Frankfurt am Main 1942.
- Maxentius Niel: Drucktechnisches Taschenlexikon . Steyrermühl, Vienna / Kälker & Hesse, Leipzig 1929.
- Georges Zürcher: General professional knowledge for book printers . Technical and textbook for book printers, 8th edition, VGF - Verlag Graphische Fachbücher, Bern 1967 (first edition: 1939 self-published ).