Link 5 is connected by turning pair E to rocker arm 4 of four-bar linkage ABCD. Rocker arm 2, turning about fixed axis G, is connected by turning pair F to link 5 and carries punch member a. When crank 1 rotates, rocker arm 2 oscillates, performing a pressing action. In the end position in pressing, points A, B and C of links 1 and 3 and points F, E and D of links 5 and 4 lie on two parallel straight lines passing through points A and D. At this, the conditions: A͞B+B͞C=F͞E+E͞D and C͞D=A͞F are complied with, i.e. figure ACDF is a parallelogram linkage.
$877$LW,HP$