The bed traveled on guide ways, and the tympan and frisket were hinged to fold back and lay in elevated position.
While this was being done, the other man was placing the sheet of paper on the "tympan."
These sheets are held in place by means of the iron clamps which slip over the ends of the tympan (see Fig. 160).
Nothing remained now but to adjust the guides which would hold the cards on the tympan.
In the cut at the head of this article, the pressman is represented as in the act of turning down the frisket upon the tympan.