FLAT BELT

• US 20120165145A1
• Filed: 09/01/2009
• Published: 06/28/2012
• Est. Priority Date: 09/01/2009
• Status: Abandoned Application

• Current Assignee: Bando Chemical Industries Limited
• Original Assignee: Bando Chemical Industries Limited
• Inventors: Kitano, Yoshiyuki, Inukai, Masahiro, Takahashi, Mitsuhiko
• Application Number:
  US13/393,481
• Publication Number:
  US 20120165145A1
• Time in Patent Office: Days
• US Class Current: 474/264
• CPC Class Codes: B65G 15/32 made of rubber or plastics
• CPC Class Codes: B65G 15/36 the layers incorporating ropes, chains, or rolled steel sections
• CPC Class Codes: B65H 2220/09 indicating that several of an entity are present
• CPC Class Codes: B65H 2401/111 Elastomer
• CPC Class Codes: B65H 2401/23 Strength of materials, e.g. Young's modulus or tensile strength
• CPC Class Codes: B65H 2404/27 material used
• CPC Class Codes: B65H 2701/1912 Banknotes, bills and cheques or the like
• CPC Class Codes: B65H 5/021 by belts
• CPC Class Codes: F16G 1/08 with reinforcement bonded by the rubber

Abstract

A flat belt includes an adhesive rubber layer formed in an endless ring shape and having a tensile member embedded therein, a first rubber layer provided on a surface of the adhesive rubber layer, and a second rubber layer provided on the other surface of the adhesive rubber layer, in which an elastic modulus in a belt width direction of the adhesive rubber layer is higher than the elastic modulus in the belt width direction of each of the first rubber layer and the second rubber layer.

Claims

1. A flat belt, comprising:

an adhesive rubber layer formed in an endless ring shape and having a tensile member embedded therein;

a first rubber layer provided on a surface of the adhesive rubber layer; and

a second rubber layer provided on the other surface of the adhesive rubber layer;

wherein

an elastic modulus in a belt width direction of the adhesive rubber layer is higher than an elastic modulus in the belt width direction of each of the first rubber layer and the second rubber layer.

2. The flat belt of claim 1, wherein

the adhesive rubber layer includes a first adhesive rubber layer which is provided toward the first rubber layer relative to a center of the tensile member and a second adhesive rubber layer which is provided toward the second rubber layer relative to the center of the tensile member, and

one of the first adhesive rubber layer and the second adhesive rubber layer is 0.8 times to 1.25 times, both inclusive, as thick as the other.

3. The flat belt of claim 2, wherein

the first adhesive rubber layer and the second adhesive rubber layer have an identical thickness.

4. The flat belt of claim 1, wherein

the adhesive rubber layer includes the first adhesive rubber layer which is provided toward the first rubber layer relative to a center of the tensile member and the second adhesive rubber layer which is provided toward the second rubber layer relative to the center of the tensile member, and

an elastic modulus in the belt width direction of one of the first adhesive rubber layer and the second adhesive rubber layer is 0.8 times to 1.25 times, both inclusive, as high as that of the other.

5. The flat belt of claim 4, wherein

the first adhesive rubber layer and the second adhesive rubber layer have an identical elastic modulus in the belt width direction.

6. The flat belt of claim 1, wherein

the adhesive rubber layer contains short fibers oriented in the belt width direction.

7. The flat belt of claim 1, wherein

a difference in elastic modulus in the belt width direction between the adhesive rubber layer and the first rubber layer is equal to or greater than the elastic modulus in the belt width direction of the first rubber layer, and

a difference in elastic modulus in the belt width direction between the adhesive rubber layer and the second rubber layer is equal to or greater than the elastic modulus in the belt width direction of the second rubber layer.

8. The flat belt of claim 1, wherein

a thickness of the adhesive rubber layer constitutes 30% or more of a total thickness of the flat belt.

9. The flat belt of claim 1, wherein

the first rubber layer and the second rubber layer have an identical thickness, are made of an identical material and have an identical elastic modulus in the belt width direction.

10. The flat belt of claim 1, wherein

the tensile member is made of a tensile cord helically extending along a belt length in a manner such that helical turns of the tensile cord are arranged at predetermined intervals across the belt width.