Sieve bed for a sifting machine

A support frame for a sieve bed comprising:

• a plurality of elongate ribs each having a thickness substantially smaller than its height, the ribs being arranged side-by-side upon a sub-frame such that the upper edges of the ribs are substantially co-planar;
• and,
• each rib being further provided with a plurality of substantially rigid mounting pins secured to the upper edge of each rib so as to secure to the support frame an array of sieve elements arranged in abutting juxtaposition and wherein the mounting pins further comprise a mushroom shaped head having a frustoconical upper surface and a substantially flat under surface and a stem extending away from the under surface of the head in substantial perpendicular relationship to the undersurface of the head, the stem having a slot formed therein that extends from a distal end of the stem toward the head, the slot being constructed and arranged such that the upper edge of a rib may be received therein for purposes of locating the mounting pin on the rib.

A support frame for a sieve bed comprising:

• a plurality of elongate ribs each having a thickness substantially smaller than its height, the ribs being arranged side-by-side upon a sub-frame such that the upper edges of the ribs are substantially co-planar;
• and, each rib being further provided with a plurality of substantially rigid mounting pins secured to the upper edge of each rib so as to secure to the support frame an array of sieve elements arranged in abutting juxtaposition and wherein the mounting pin is stamped from a metal plate and comprises a hollow cylindrical body having an upper end and a lower end, the lower end of the body having an aperture formed there through and the upper end of the body having depending downwardly therefrom a substantial frustoconical surface.

A mounting pin for securing a sieve element to a support frame comprising:

• a mushroom shaped head having a frustoconical upper surface and a substantially flat under surface;
• and,
• a stem extending away from the under surface of the head in substantially perpendicular relationship to the undersurface of the head, the stem having a slot formed therein that extends from a distal end of the stem toward the head, the slot being constructed and arranged such that the upper edge of a rib may be received therein for purposes of locating the mounting pin on the rib.

A support frame for a sieve bed comprising:

• a plurality of elongate ribs arranged side-by-side upon a sub-frame such that the upper edges of the ribs are substantially co-planar;
• and,
• each rib being further provided with a plurality of substantially rigid mounting pins secured to the upper edge of each rib so as to secure to the support frame an array of sieve elements arranged in abutting juxtaposition and wherein the mounting pins further comprise a frustoconical upper surface arranged and constructed to be substantially received within a receptacle formed by a pair of cooperative apertures formed in adjacent edges of substantially abutting sieve elements.