METHOD OF PRODUCING ELECTRICALLY CONDUCTIVE FOAM RUBBER ROLLER, ELECTRICALLY CONDUCTIVE FOAM RUBBER ROLLER, AND IMAGE FORMING APPARATUS
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United States of America Patent
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N/A
Issued Date -
Feb 12, 2015
app pub date -
Jul 22, 2014
filing date -
Aug 7, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a production method for producing an electrically conductive foam rubber roller which has a tubular body free from internal abnormal foaming and hence free from internal cracking after the foaming. The production method includes the steps of: continuously extruding a rubber composition into a tubular body (7); and passing the extruded tubular body (7) through a microwave crosslinking device (8) and then through a hot air crosslinking device (9) in an elongated state without cutting the tubular body. The rubber composition is extruded, foamed and crosslinked so that the tubular body has a thickness unevenness of not greater than 1.3 immediately after being passed through the hot air crosslinking device (9), the thickness unevenness being defined as a ratio Tmax/Tmin between a maximum radial thickness Tmax and a minimum radial thickness Tmin of the tubular body which are each measured in a cross section of the tubular body.
First Claim
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Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | A | JP2015033767 | Aug 07, 2013 |
| CN | A | CN104339611 | Jul 25, 2014 |
International Classification(s)
- 2014 Application Filing Year
- B29C Class
- 4829 Applications Filed
- 3911 Patents Issued To-Date
- 80.99 % Issued To-Date
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- 0 Citation Count
- B29C Class
- 0 % this patent is cited more than
- 10 Age