Crushing apparatus

Patent metadata

Field	Value
Publication number	US-11173495-B2
Application number	US-202016748838-A
Country	US
Kind code	B2
Filing date	Jan 22, 2020
Priority date	Jan 24, 2019
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

A crushing apparatus includes a first rotary shaft member, a second rotary shaft member, a plurality of first rotary cutters, a plurality of second rotary cutters, a plurality of first spacers, and a plurality of second spacers, the first rotary cutters and the first spacers being alternately disposed in a first axis direction, the second rotary cutters and the second spacers being alternately disposed in the first axis direction, the first rotary cutters and the second rotary cutters each forming a tearing blade that protrudes in a direction perpendicular to the first axis direction, a portion of each of the first rotary cutters and a portion of each of the second rotary cutters overlapping when viewed from the first axis direction, and a gap being provided between the first rotary cutter and the second rotary cutter in the first axis direction.

First claim

What is claimed is:

1. A crushing apparatus comprising:
a first rotary shaft member that rotates about a first axis; a second rotary shaft member that rotates about a second axis parallel to the first axis in an opposite direction to a direction in which the first rotary shaft member rotates;
a plurality of first rotary cutters provided on the first rotary shaft member and rotating together with the first rotary shaft member;
a plurality of second rotary cutters provided on the second rotary shaft member and rotating together with the second rotary shaft member;
a plurality of first spacers provided on the first rotary shaft member; and
a plurality of second spacers provided on the second rotary shaft member,
wherein the first rotary cutters and the first spacers are alternately disposed in a first axis direction,
the second rotary cutters and the second spacers are alternately disposed in the first axis direction,
the first rotary cutters and the second rotary cutters each form a tearing blade that protrudes in a direction perpendicular to the first axis direction,
a portion of each of the first rotary cutters and a portion of each of the second rotary cutters overlap when viewed from the first axis direction, and
a gap is provided between the first rotary cutter and the second rotary cutter in the first axis direction; and
wherein the first rotary cutter and the second rotary cutter each include:
a first surface and a second surface that are perpendicular to the first axis direction,
a third surface formed in a thickness direction of the first rotary cutter and the second rotary cutter, the tearing blade being provided on the third surface, and
a ripping blade protruding in a direction intersecting the second surface between the second surface and the third surface, and a size of the gap is larger than a size of the ripping blade in the first axis direction.

2. The crushing apparatus according to claim 1 ,
wherein the third surface includes a protruding portion protruding in the direction perpendicular to the first axis direction, and
a corner portion of the protruding portion provided on the third surface has an obtuse angle of 90° or more, or the corner portion is chamfered.

3. The crushing apparatus according to claim 1 , further comprising:
a first gap-forming member provided on the first rotary shaft member and forming the gap; and
a second gap-forming member provided on the second rotary shaft member and forming the gap.

Assignees

• Seiko Epson Corp

Inventors

• Kurata Hiroki
• Miyasaka Yoichi

Classifications

• B02C18/18

  Knives; Mountings thereof · CPC title

• B02C18/142

  with two or more inter-engaging rotatable cutter assemblies · CPC title

• B02C18/0007 Primary

  specially adapted for disintegrating documents · CPC title

• B02C18/10 Primary

  with drive arranged above container {(B02C18/083 takes precedence)} · CPC title

• D21B1/10 Primary

  by cutting actions · CPC title