Konica Corporation

Kao Corporation

Yuko Takahashi

Naohiro Ono

Hiroshi Kobayashi

Masao Itoh

Hiroshi Miyakoshi

Toyotsugu Itoh

Susumu Matsui

Naoji Kamimura

Yoshio Iwamura

Katsuji Sasaki

The present invention relates to an oral composition having excellent stability and persistence of moderate foaming while sufficiently dispersing biofilm firmly adhered to a tooth surface and showing a good bactericidal effect. That is, the present invention provides an oral composition comprising the following ingredients (A), (B), (C), and (D): (A) 0.001 mass % or more and 0.3 mass % or less of myristoyl glutamic acid or a salt thereof; (B) 0.001 mass % or more and 0.3 mass % or less of lauroyl glutamic acid or a salt thereof; (C) an alkylsulfate; and (D) water, wherein a mass ratio of the content of ingredient (A) to the content of ingredient (B), ((A)/(B)), is 0.25 or more and 4 or less; and the content of a polyphosphoric acid or a salt thereof is 0.01 mass % or less.

Oral composition

A light-beam deflecting apparatus is provided in which a polygon mirror is pushed against a flange to hold it stationary. The light-beam deflecting apparatus includes a base member; a polygon mirror rotatable with respect to the base member; a flange contacting the polygon mirror to hold the polygon mirror; and a pushing member to push the polygon mirror against the flange. One or both of contacting surfaces of the polygon mirror and the flange is/are finished to a surface roughness of Ry, which fulfills a first formula of Ry>3 &mgr;m or a second formula of 3 &mgr;m&lE;Ry&lE;20 &mgr;m.

Light-beam deflecting apparatus, manufacturing method of light-beam deflecting apparatus and image-forming apparatus

A rotary apparatus includes: a radial fixed member; a rotary unit rotatably supported on the radial fixed member; a radial dynamic pressure bearing portion at which the radial fixed member faces the rotary unit; and dynamic pressure generating grooves formed on the radial dynamic pressure bearing portion. The dynamic pressure generating grooves are asymmetrically formed with respect to a rotary axis of the rotary unit.

Rotary apparatus with asymmetrically formed dynamic pressure generating grooves

A dynamic pressure generating bearing includes a rotational body, a radial bearing provided adjacent to a center of the rotational body to rotatably support the rotational body around the radial bearing and at least one thrust bearing provided on one end of the radial bearing. When the rotational body is stably rotated, a minimum clearance generated between the rotational body and the thrust bearing is always greater than a minimum clearance generated between the rotational body and the radial bearing.

Dynamic pressure bearing

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Tokyo, Japan

Yuko Takahashi