Abstract: A method of manufacturing an abrasive member, in particular having the general shape of a disc such as a cutting or grinding disc, comprises arranging a reinforcing insert or reinforcing member into a mold between a layer of curable abrasive resin compound, in particular a layer of curable abrasive granulate, a backing member such that at least a section of the reinforcing insert or reinforcing member is in direct physical contact with the curable abrasive resin compound, the reinforcing insert or reinforcing member is at least partially covered by the backing member and at least a section of the backing member is in direct physical contact with the curable abrasive resin compound; bonding the reinforcing insert or reinforcing member and the backing member by curing the curable abrasive resin compound, wherein the cured abrasive resin compound forms an abrasive layer of the abrasive member.

Abstract: A method of manufacturing an abrasive member, in particular having the general shape of a disc such as a cutting or grinding disc, comprises arranging a reinforcing insert or reinforcing member into a mold between a layer of curable abrasive resin compound, in particular a layer of curable abrasive granulate, a backing member such that at least a section of the reinforcing insert or reinforcing member is in direct physical contact with the curable abrasive resin compound, the reinforcing insert or reinforcing member is at least partially covered by the backing member and at least a section of the backing member is in direct physical contact with the curable abrasive resin compound; bonding the reinforcing insert or reinforcing member and the backing member by curing the curable abrasive resin compound, wherein the cured abrasive resin compound forms an abrasive layer of the abrasive member.

Abstract: A method of manufacturing an abrasive member, in particular having the general shape of a disc such as a cutting or grinding disc, comprises arranging a reinforcing insert or reinforcing member into a mold between a layer of curable abrasive resin compound, in particular a layer of curable abrasive granulate, a backing member such that at least a section of the reinforcing insert or reinforcing member is in direct physical contact with the curable abrasive resin compound, the reinforcing insert or reinforcing member is at least partially covered by the backing member and at least a section of the backing member is in direct physical contact with the curable abrasive resin compound; bonding the reinforcing insert or reinforcing member and the backing member by curing the curable abrasive resin compound, wherein the cured abrasive resin compound forms an abrasive layer of the abrasive member.

Abstract: The invention relates to a matrix device (1) for tooth treatments comprising a matrix (2) and at least one wedge (3), wherein said matrix (2) is made of a flexible material and is or can be connectable to said solid and reversibly deformable wedge (3) in such a way that they are embodied in the form of one single component.

Abstract: A cylinder head of an internal-combustion engine, operating with the four-strike Otto cycle, has a pair of diametrically opposite outlet ports and a pair of diametrically opposite inlet ports offset by 90.degree. from each other. Two coaxial annular shutters in the cylinder head, corotating with a speed ratio of 2:1, have each two mutually opposite solid quadrants and two intervening quadrants with valve apertures registering with the outlet ports and then with the inlet ports in two angular positions of the slower-rotating shutter spaced 45.degree. apart, both pairs of ports being blocked during the next quarter-turn of this shutter. A flow divider in the cylinder head directs richer components of an aspirated fuel/air mixture toward a spark plug while leaner components are diverted toward an associated piston head.