Abstract: A disc transport member whose width for mounting of a disc is smaller than the diameter of the disc is inserted into and removed from a drive main body while being mounted with the disc. A disc protection member is provided, so as to face the disc, on an edge of the disc transport member or a region close thereto on a side where the disc that is mounted on the disc transport member projects.

Abstract: A disc transport member whose width for mounting of a disc is smaller than the diameter of the disc is inserted into and removed from a drive main body while being mounted with the disc. A disc protection member is provided, so as to face the disc, on an edge of the disc transport member or a region close thereto on a side where the disc that is mounted on the disc transport member projects.

Abstract: A disc transport member whose width for mounting of a disc is smaller than the diameter of the disc is inserted into and removed from a drive main body while being mounted with the disc. A disc protection member is provided, so as to face the disc, on an edge of the disc transport member or a region close thereto on a side where the disc that is mounted on the disc transport member projects.

Abstract: A device for cooling a frictional clutch for an automobile with respect to a clutch housing provided between a cylinder block and a transmission case is herein disclosed. The device comprises passages respectively formed in surfaces of the clutch housing contacting the end plate and the transmission case for introducing and discharging cooling air into and from the clutch housing. Each of the passages has an opening toward the interior of the clutch housing and another opening toward the exterior of the clutch housing. The openings are deviated from each other with respect to the circumferential direction of the clutch housing.

Abstract: A clutch release bearing assembly, having a rotatable outer race and a pair of shielding plates mounted on the outer race to seal the interior of the bearing assembly, which is provided with a plurality of exhaust passages radially extending from a space formed on the outside of at least one of the shielding plates to the exterior of the bearing assembly.

Abstract: A method for preventing the surface of a hydrogel of a water-soluble acrylamide-type polymer from being tacky, which comprises coating the surface of the hydrogel with at least one of a higher fatty acid or an alkali metal salt thereof.

Abstract: A method of reducing the adhesiveness of a water-soluble hydrogel-like polymer obtainable by aqueous solution polymerization of acrylamide or a monomeric mixture consisting mainly of acrylamide in a high monomer concentraton using polyethylene glycol. Where the hydrogel-like polymer has already been formed, the adhesiveness of the polymer can be reduced by merely applying polyethylene glycol to the surface of the polymer. Where it is desired to obtain a hydrogel-like polymer whose adhesiveness has been reduced, a very simple method of performing the polymerization in the presence of polyethylene glycol can be used to achieve the desired objective.