Method for manufacturing endless belt and endless belt

Patent metadata

Field	Value
Publication number	US-9944032-B2
Application number	US-201314646967-A
Country	US
Kind code	B2
Filing date	Nov 12, 2013
Priority date	Nov 26, 2012
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A method for manufacturing an endless belt includes: coating a depression that is formed between both belt longitudinal ends of surface rubber of a belt and to which an adhesion processing material is attached, with at least one layer of unvulcanized rubber sheet; and vulcanizing the unvulcanized rubber sheet to bond the unvulcanized rubber sheet to the surface rubber, in which A is less than B, where A is a belt longitudinal distance between a belt longitudinal edge of an interface of the unvulcanized rubber sheet and the adhesion processing material and a belt longitudinal edge of the depression, and B is a belt longitudinal distance between a belt longitudinal edge of an area to which the adhesion processing material is attached and the belt longitudinal edge of the depression.

First claim

The invention claimed is:

1. A method for manufacturing an endless belt comprising:
providing a belt, the belt comprising rubber surfaces and two longitudinal ends;
placing the longitudinal ends adjacent one another such that a depression is formed at a surface of the belt where the longitudinal ends meet;
applying adhesion processing material to portions of the longitudinal ends including areas which define the depression;
attaching an unvulcanized rubber sheet to portions of the longitudinal ends including the areas which define the depression, wherein a longitudinal length of the unvulcanized rubber sheet is reduced in a direction away from the rubber surface;
vulcanizing the unvulcanized rubber sheet to bond the unvulcanized rubber sheet to the surface rubber,
wherein A is less than B, where A is the distance from a longitudinal end of the unvulcanized rubber sheet to a longitudinal edge of the depression, and B is the distance from a longitudinal edge of the applied adhesion processing material to the longitudinal edge of the depression.

2. The method for manufacturing the endless belt according to claim 1 , comprising performing adhesion improvement processing on the longitudinal ends of the belt before the unvulcanized rubber sheet is attached,
wherein A is less than B, and B is less than C, where C is a belt longitudinal distance between a belt longitudinal edge of an area subjected to the adhesion improvement processing and the belt longitudinal edge of the depression.

3. The method for manufacturing the endless belt according to claim 2 ,
wherein A is greater than or equal to 10 millimeters and A is less than or equal to 20 millimeters, B is greater than 20 millimeters and B is less than or equal to 40 millimeters, and C is greater than 50 millimeters and C is less than or equal to 70 millimeters.

4. The method for manufacturing an endless belt according to claim 1 ,
wherein the adhesion processing material is selected from the group consisting of rubber cement, unvulcanized adhesive rubber and unvulcanized pressure sensitive adhesive rubber.

5. The method of manufacturing an endless belt according to claim 1 ,
wherein the rubber sheet is diagonally cut at opposite longitudinal ends before the vulcanization step.

Assignees

• Bridgestone Corp

Inventors

• Matsudaira Nobuhide

Classifications

• B29C66/73756

  the to-be-joined areas of both parts to be joined being fully cured · CPC title

• B29C66/71

  characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125) · CPC title

• B29C66/861

  Hand-held tools · CPC title

• B29C66/8362

  Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined · CPC title

• B29C66/723

  being multi-layered (B29C66/7292, B29C66/72941 take precedence) · CPC title