Rotary blade shredding apparatus with stationary bars in the form of a sinusoidal or broken line, acting as counterblade and grid

• US 20020050538A1
• Filed: 09/25/2001
• Published: 05/02/2002
• Est. Priority Date: 10/26/2000
• Status: Abandoned Application

• Current Assignee: Satrind S.R.L.
• Original Assignee: Satrind S.R.L.
• Inventors: Fabio, Rota
• Application Number:
  US09/964,183
• Publication Number:
  US 20020050538A1
• Time in Patent Office: Days
• US Class Current: 241/88.4
• CPC Class Codes: B02C 18/142 with two or more inter-engaging rotatable cutter assemblies
• CPC Class Codes: B02C 18/16 Details

Abstract

A rotary blade shredding apparatus comprising a plurality of shredder rollers (14, 15, 16) with parallel axes, each roller comprising a rotationally driven shaft and a plurality of rotating blades spaced axially therealong, and a cut-cooperating screening member (20), the blades of adjacent rollers being axially intercalated, characterized in that the cut-cooperating screening member comprises a plurality of bars (22) having a shape among the following: a broken line (22a), a wavy line (22b), so as to have bar portions protruding from one side and the other of a theoretical median line (m) of the bar.

Claims

1. A shredding apparatus with rotary blades, comprising a plurality of shredding rollers (14, 15, 16) with parallel axes, each roller comprising a rotationally driven shaft and a plurality of rotating blades spaced axially therealong, and a cut cooperating and screening member (20), the blades of adjacent rollers being intercalated axially, characterized in that the cut-cooperating and screening member comprises a plurality of bars (22) having a shape among the following:

a broken line (22a), a wavy line (22b), so as to have portions of bar protruding on one side and the other of a theoretical median line (m) of the bar.

2. An apparatus according to claim 1 characterized in that the bars are disposed with the respective median lines substantially parallel to the axis of the rollers and having a cutting edge (24, 25) in the part thereof facing toward the axis of the rollers.

3. An apparatus according to claim 1, characterized in that adjacent bars of the member (20a, 20d) are disposed with the respective protruding parts aligned in a direction at right angles to the extension of the bars.

4. An apparatus according to claim 1, characterized in that adjacent bars of the member (20b, 20e) are disposed with respective protruding parts offset from one another.

5. An apparatus according to claim 1, characterized in that adjacent bars of the member (20c, 20f) have opposing protruding parts.

6. An apparatus according to claim 1 wherein the bars are obtained by bending a steel bar in a mould and grinding the surface thereof intended to face toward the axis of the roller.

7. A cut-cooperating and screening member for a shredding apparatus with rotary blades characterized in that it comprises a plurality of bars (22) having a shape among the following:

a broken line, a curved or wavy line, so as to have portions of bar protruding on one side and the other of a theoretical median line (m) of the bar.