Other

Kazuaki Sakai

Yasunori Nanri

Keigo Watanabe

Tatsuya Andoh

Makoto Nakao

Kazushi Yanagimoto

Takehiro Otsubo

Katsuyuki Nakayama

An object of the present invention is to provide a practical gear and gear train which can be used in an actual gear drive system. Another object of the present invention is to provide a non-circular and asymmetrical gear which is practically used in view of durability, a gear train using that gear, and a barrel finishing machine using that gear. Non-circular and asymmetrical gearhas a plurality of tooth profiles, each of which comprises a substantially semicircular top curve lineand a substantially semicircular bottom curved line. A center pointof the top curved lineis on a pitch line, and a center pointof the bottom curved linelies inside the pitch line

Method of manufacturing asymmetric gear, asymmetric gear, non-circular and asymmetric gear, gear mechanism, and barrel finishing machine

In a process for producing kraft pulp, the process is made closed, the yield of pulp is improved and environmental problems are minimized. An alkaline solution containing Na S which flows in a process of producing kraft pulp, is electrolyzed by an electrolytic oxidation method; a liquid which is formed at an anode side and contains a polysulfide type sulfur in an amount of 6 g/l or more, is added, as it is or after being causticized, to the process before a chip has the maximum temperature, and a NaOH solution formed at a cathode side, is added to at least one step of the process after the chip has the maximum temperature till a final bleaching stage; and at least chemicals in the step wherein NaOH is added, among chemicals discharged in all steps from a cooking step till the final bleaching stage, are recovered and reused.

Method for recovering chemicals in a process of producing pulp by kraft process

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Shiga, Japan

Kazuaki Sakai