Mitsubishi Jukogyo Kabushiki Kaisha

Mitsubishi Heavy Industries Limited

Hiroaki Ogasawara

Takafumi Shimada

Setsuo Omoto

Kazuto Kobayashi

Masaki Kawano

Tatsufumi Aoi

Mitsuo Kato

Shigenari Horie

Toshiro Kobayashi

Takayoshi Kawaoka

Yoshitaka Tsumoto

Takao Yamazaki

Hidetaro Mori

Kenichiro Nakamura

An object is providing an electrostatic attraction apparatus and an attracting/releasing method capable of reliably attracting and quickly releasing a glass substrate. An attraction force for attracting a glass substrate is obtained according to the physical properties of the glass substrate. In addition to obtaining an attraction voltage (V(t)) required for obtaining the attraction force, a holding voltage (V(t)) for holding an attraction state and a release voltage (V(t)) for releasing the glass substrate are also obtained (Sto S). Attraction time period (t) is actually measured and if this measured time is different from a preset attraction time (t), the holding voltage (V(t)) and the release voltage (V(t)) are recalculated according to the actually measured attraction time period (t) (Sto S).

Electrostatic attraction apparatus for glass substrate and method of attracting and releasing the same

A stirring apparatus includes a container with a rotary stirring shaft therein. On the opposite sides of the rotary stirring shaft are mounted an upper vertical flat blade and first inclined flat blades opposite to each other. A first vertical flat blade has a sweptback blade associated therewith, and is mounted to the stirring shaft at a position under the first inclined flat blades, and a second inclined flat blade or blades and a second vertical flat blade having an associated sweptback blade are mounted to the stirring shaft at a position under the upper vertical flat blade. When the stirring shaft rotates, ascending flows of liquid to be processed along the inner wall within a vessel are generated by the upper vertical flat blade and the first and second vertical flat blades that are each associated with a sweptback blade. Descending flows of the liquid to be processed are generated by the inclined flat blades, thereby enhancing the mixing performance.

Stirring apparatus having blades creating a circulating flow

In order to improve mixing efficiency of highly viscous fluid, while structural simplicity being maintained, two types of stirring impellers are employed in a single stirring apparatus. One of such stirring impellers is a large flat impeller and the other is a slanted or screw-shaped impeller to cause an up-and-down flow. This principle is further utilized in a stirring tower type polymerization reaction apparatus which has an array of mixing areas, each of which corresponds to the stirring apparatus above, and partitions between the mixing areas. The partitions are disposed so that the temperature of reaction can be controlled easily. Undesirable effects such as 'dead space', space in which flow is insufficient, and the attachment of gelled material to the rotational shaft can be avoided while rather obvious, but no less important, advantages of efficient and uniform mixing, etc., are secured.

Stirring apparatus and stirring tower type apparatus for polmerization

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Hiroshima, Japan

Hiroaki Ogasawara