(1) In this photo I am folding an edge of the tympan paper over to place over the bottom platen.(2) One last point, however: when the card is removed the original image on the tympan sheet will be exposed.(3) Please use the chase dimension only when ordering tympan for your ‘platen’ press.(4) Jacques Derrida, in the preface to Margins of Philosophy, identifies the printing press-specifically, the ‘ tympan ’ as the agent of division.(5) The pressman pulled on the bar, causing the platen to press the tympan on the inked type and taking the impression.(6) Of interest is the western portal of the vestry with twisted columns and tympans , arranged in a ledge.