# US 2019/0168260 A1 · Sieve

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- Number: US 2019/0168260 A1
- Document ID: US20190168260A1
- Status: Published application
- Kind: A1
- Application number: 16/304,696
- Filed: 2018-02-20
- Published: 2019-06-06
- Earliest claimed: 2017-03-01
- Assignees: Optnics Precision Co., Ltd.
- Applicants: Optnics Precision Co., Ltd.
- Inventors: Seichin KINUTA
- Web page: https://patentgrep.com/patent/US20190168260A1

## CPC

- B07B 1/4609: {constructional details of screening surfaces or meshes}
- B07B 1/4645: {Screening surfaces built up of modular elements}
- B07B 1/46: Constructional details of screens in general; Cleaning or heating of screens
- B07B 1/469: {Perforated sheet-like material}
- B07B: SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL (wet separating processes, sorting by processes using fluent material in the same way as liquid B03; combinations of dry separating apparatus with wet separating apparatus B03B; using liquids B03B, B03D; sorting by magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high voltage electric fields B03C; centrifuges or vortex apparatus for carrying out physical processes B04; hand sorting, postal sorting, sorting by switching or other devices actuated in response to detection or measurement of some feature of articles or samples of material B07C)

## Abstract

In a sieve, unit blocks are arrayed along an up-down direction and a left-right direction. Each unit block includes elongated holes and short holes that are shorter than the elongated holes. In each of the unit blocks, the elongated holes include a first elongated hole extending along a first length direction and a second elongated hole extending along a second length direction intersecting an extension line running along the first length direction. Plural of the short holes are arranged in each of the unit blocks so as to be arranged between long edges of adjacent elongated holes of the elongated holes.

## Claims

### Claim 1

A sieve comprising:
unit blocks that are arrayed along an up-down direction and a left-right direction, each unit block including elongated holes and short holes that are shorter than the elongated holes, wherein:
in each of the unit blocks, the elongated holes include a first elongated hole extending along a first length direction and a second elongated hole extending along a second length direction intersecting an extension line running along the first length direction; and
a plurality of the short holes per row are arranged in each of the unit blocks so as to be arranged between long edges of adjacent elongated holes of the elongated holes.

### Claim 2 (depends on 1)

The sieve of claim 1, wherein:
the extension line running along the first length direction intersects a second length direction center point of the second elongated hole; and
an extension line running along the second length direction intersects a first length direction center point of the first elongated hole.

### Claim 3 (depends on 1)

The sieve of claim 1, wherein the short holes are arranged in one or more rows running parallel to the second length direction.

### Claim 4 (depends on 2)

The sieve of claim 2, wherein the short holes are arranged in one or more rows running parallel to the second length direction.

### Claim 5 (depends on 1)

The sieve of claim 1, wherein a plan view profile of the short holes is at least one of a circular shape, an elliptical shape, or a polygonal shape.

### Claim 6 (depends on 2)

The sieve of claim 2, wherein a plan view profile of the short holes is at least one of a circular shape, an elliptical shape, or a polygonal shape.

### Claim 7 (depends on 3)

The sieve of claim 3, wherein a plan view profile of the short holes is at least one of a circular shape, an elliptical shape, or a polygonal shape.

### Claim 8 (depends on 4)

The sieve of claim 4, wherein a plan view profile of the short holes is at least one of a circular shape, an elliptical shape, or a polygonal shape.