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US 4,840,491 AGranted
Rubber kneading method
AssigneeBridgestone Corporation
InventorsYoshiaki Hagiwara, Hiromi Ishida, Takeyoshi Takahashi
Life of this patent
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Abstract
In a method of kneading rubber, rubber is kneaded with a kneading mixer, and the rubber thus kneaded is caused to pass through roll means to form a rubber sheet whose thickness is not more than 3 mm, whereby the rubber having a desired degree of plasticity can be obtained by using the kneading mixer only once.
Claims7
A method of kneading rubber comprising the steps of:
- kneading rubber with a kneading mixer;
- discharging said rubber thus kneaded from said kneading mixer;
- passing said rubber thus discharged through first roll means to form a first rubber sheet having a predetermined thickness;
- passing rubber of said first rubber sheet through second roll means to form a second rubber sheet whose thickness is 2 mm or less;
- and
- passing rubber of said second rubber sheet through third roll means to form a third rubber sheet having a desired final thickness;
- wherein said predetermined thickness is thicker than 3 mm.
4 more elements
Dependencies are inferred from the claim text.