Section 63.—PRESSING.

The ordinary Screw press and Hydraulic press are well-known machines.

[1180]. Rack and screw press.

[1181]. Power press or stamp, with double crank movement worked from below.

[1182]. Dick’s anti-friction press, with rolling contacts throughout.

[1183]. Hydraulic press, with dies for lead pipe making; a similar press is used for making earthenware drain and flue pipes, the material being forced out of an annular orifice.

[1184]. Wedge press.

[1185]. Ster-hydraulic press; a strand or rope is wound upon a barrel inside the cylinder, thus displacing the water and raising the ram.

[1186]. Screw fly press.

[1187]. Combined screw and hydraulic press. The screw is worked down by hand until the pressure becomes too great for hand power, when the pressing is finished by the hydraulic ram.

[1188]. Revolving dies.

[1189]. The “Boomer” double-screw toggle press, with increasing pressure as the press follower descends.

[1190]. Revolving toggle press, with similar capabilities but more restricted movement.

[1191]. Sector and link press for increasing pressure.

[Larger plate.]

[1192]. Press dies, with sliding plate for discharging.

[1193]. Screw and toggle press; a modification of [No. 1189].

[1194]. Double ram hydraulic press for two pressures; the small ram is employed to give the first pressure, the large ram then finishes the pressing.