How it works
This is the wooden hand press, a design that stayed much the same for more than three centuries after Gutenberg. It is drawn from the side with the carriage run out, then from the front.
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Pulling one sheet
The printer inks the forme with the ink balls, lays a sheet on the tympan and folds the frisket over it. Both fold down onto the type. Turning the rounce runs the coffin in under the platen, and pulling the bar turns the screw, which presses the platen down. The rounce then runs the coffin out again.
The frame takes the strain
The screw turns in a nut in the head, so the head is pushed up while the winter under the carriage is pushed down. The two cheeks hold them together, and the cap keeps the cheeks apart.
- The old books spell platen as platten or plattin, and forme as form.
- A modern offset press is a different machine and is not drawn here.
Questions and answers
What are the parts of a printing press?
A frame of two cheeks with a cap, head, till and winter; a spindle with a screw, a bar, a hose and a platen; and a carriage with ribs, a coffin, a stone, the forme, a tympan, a frisket and a rounce.
What are the tympan and frisket?
Two hinged frames at the outer end of the coffin. The sheet of paper is laid on the tympan. The frisket, cut out where the type prints, folds over the sheet and keeps its margins clean. Then both fold down onto the type.
What is the platen on a printing press?
The flat block that does the pressing. It hangs under the screw, and when the printer pulls the bar the screw forces it down, pressing the paper against the inked type.
Who invented the printing press?
Johannes Gutenberg, a German goldsmith, around 1440. He brought together the screw press and movable type. The wooden hand press stayed much the same until iron presses arrived about 1800.