# US 10,551,767 B2 · Manufacturing method for developer container, developer container, developing apparatus, and process cartridge

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- Number: US 10,551,767 B2
- Document ID: US10551767B2
- Status: Granted
- Kind: B2
- Application number: 15/815,421
- Filed: 2017-11-16
- Published: 2018-05-24
- Granted: 2020-02-04
- Earliest claimed: 2016-11-22
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Naoya Asanuma; Tetsuya Numata; Takatoshi Hamada
- Web page: https://patentgrep.com/patent/US10551767B2

## CPC

- G03G 15/0856: {Detection or control means for the developer level}
- G03G 15/086: {the level being measured by electro-magnetic means}
- G03G 21/181: {Manufacturing or assembling, recycling, reuse, transportation, packaging or storage}
- G03G 15/0865: {Arrangements for supplying new developer}
- G03G 15/752: {with renewable photoconductive layer}
- G03G 2221/1876: for production purposes, e.g. manufacture or mass production
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A developer container is manufactured in which, in molding, a recess is disposed in an area in which a confluence in which first resin poured from a first inlet and second resin poured from a second inlet merge is formed.

## Claims

### Claim 1

A manufacturing method for a developer container capable of detecting a developer amount using a change in electrostatic capacitance between a first electrode and a second electrode, comprising:
holding a first resin sheet, which will become the first electrode, to a first area of a mold and a second resin sheet, which will become the second electrode, to a second area of the mold, the second resin sheet including a recess in such that the recess is located at a position that faces a longitudinal end portion of the first resin sheet; and
molding the developer container which includes the first resin sheet and the second resin sheet by pouring resin in from a first inlet of the mold and a second inlet of the mold,
wherein the recess is disposed in an area in which a confluence is formed by the merging of the resin poured from the first inlet and the resin poured from the second inlet.

### Claim 2 (depends on 1)

The manufacturing method for the developer container according to claim 1, wherein a distance from the longitudinal end portion of the first resin sheet to a longitudinal end portion of the second resin sheet is shorter than a distance from a bottom portion of the recess of the second resin sheet to the first resin sheet.

### Claim 3 (depends on 1)

The manufacturing method for the developer container according to claim 1, wherein the forming includes pouring resin in from the first inlet and the second inlet, forming a first frame including the first resin sheet and the second resin sheet, and welding the first frame and a second frame which is different from the first frame to form the developer container.

### Claim 4 (depends on 1)

The manufacturing method for the developer container according to claim 1, wherein a glass transition temperature of resin which constitutes the first resin sheet is lower than a glass transition temperature of the resin poured into the first and second inlets.

### Claim 5 (depends on 1)

The manufacturing method for the developer container according to claim 1, wherein the shape of the recess is any one of triangular, quadrangular, trapezoidal, rectangular, and semicircular shapes.

### Claim 6 (depends on 1)

The manufacturing method for the developer container according to claim 1,
wherein the developer container includes a conveyance member which has a sheet-shaped conveyance unit for conveying the developer and,
wherein in a rotational direction of the conveyance member, the second resin sheet is located on the upstream side of the first inlet and the second inlet, and is located on the downstream side of the first resin sheet.