Kureha Kagaku Kogyo Kabushiki Kaisha

Kureha Chemical Industry Company, Limited

Tohbu Mx Limited

Masaaki Shimada

Hisatsugu Kaji

Shigeru Saitoh

Koji Saito

Yoshiaki Midorikawa

Takeshi Imura

Shuichi Sugawara

An abrasing apparatus including an annular barrel having an upper opening. The barrel is rotated around an exciting coil and is filled with magnetic abrasive powder which is arranged by magnetic flux generated by the exciting coil to form magnetic brush. A work is embedded into the magnetic brush. The work is rotated together with a spindle and the barrel is rotated so that the surface of the work is abrased by the magnetic brush. A bottom magnetic pole, a lateral magnetic pole and an upper magnetic pole are disposed in an inner periphery in the barrel in the proximity to the exciting coil and the strong magnetic brush is locally formed therein. The side portion of the work is located in the local magnetic brush, and the bottom, side and upper surfaces of the work are abrased like a mirror surface.

Abrasing apparatus using magnetic abrasive powder

A process and an apparatus for distributing short fibrous material onto a horizontally travelling sheet. A disintegrated short fibrous material is fed into a hopper comprising a substantially hollow casing disposed above the travelling sheet and having a fiber discharge port at a lower portion with of a side wall on the downstream side. A mesh having a width equal to or larger than that of the travelling sheet and having partitions provided thereabove for suppressing the transverse movement of the fiber is provided below the hopper and with a spacing above the travelling sheet. The mesh screen is horizontally and transversely vibrated to distribute the fiber therethrough onto the travelling sheet, whereby the fiber is uniformly distributed without causing pilling even if it is fed at a considerably small rate.

Process for continuously distributing fibrous material and apparatus

Crystals containing a molten liquid at the bottom of a purifying tower are cooled, so that three effects i.e., washing, sweating and recrystallization are improved while maintaining a heat balance within a tower to thereby obtain highly pure crystals. The apparatus according to this invention comprises a crystal purifying tower of a transversal cross sectional configuration in which two circles are partially joined to each other and in which a stirrer having blade members spirally attached around the surface of a rotational shaft is disposed at the center for each of the circles, the purifying tower having a starting material feed means about at the middle thereof, a heating means and a product take out port at the upper portion thereof, a cooled crystal feed means, a low purity crystal component take out means and a means for extracting a portion of the crystal component at low purity out of the system at the bottom thereof, wherein the crystal component at low purity taken out by the low purity crystal component take out means is crystallized and then cooled by a means disposed outside the purifying tower for crystallizing and then cooling the crystal component at low purity, and the crystals thus crystallized and then cooled are fed by means of the cooled crystal feed means to the purifying tower.

Apparatus for purifying crystals

Growing community of inventors

Iwaki, Japan

Masaaki Shimada