Fig. 3160.
Pressure bar p has at its lower end a steel spring j, [Fig. 3159], and is supported at each end by circular links y, projecting into grooves provided in the main frame of the machine, as shown in [Figs. 3160] and [3161], in which c is the cutter spindle, y the circular link at the end of pressure bar p, and y the circular link at the end of pressure bar b, the two fitting into the one stepped groove.
Fig. 3161.
This groove is concentric with the cutter spindle c, so that the pressure bars keep at a positive or equal distance from the edges of the cutter, no matter what the thickness of the work or the depth of the cut may be.
Fig. 3162.