Abstract: An adhesive tape includes a foam base and an adhesive layer disposed on at least one surface of the foam base, in which the foam base has a thickness of 120 ?m or less, a 25% compressive strength of 160 MPa or more, and a density of 0.4 g/cm3 or more, and an average bubble diameter in a vertical direction of the foam base is 23 to 50 ?m. Even though the adhesive tape has a small thickness, with this adhesive tape, it is possible to realize excellent waterproofness due to good conformability to an adherend, such drop impact resistance that detachment of the adhesive tape and cracking of the foam base at the time of dropping do not easily occur, and such excellent reworkability that a component can be efficiently separated even in the case where a problem occurs.

Abstract: An adhesive tape including a particular foam base is provided. An average bubble diameter in a machine direction (MD) and an average bubble diameter in a cross-machine direction (CD) of the foam base are each 150 ?m or less, the ratio of the average bubble diameter in the machine direction/an average bubble diameter in a vertical direction (VD) and the ratio of the average bubble diameter in the cross-machine direction/the average bubble diameter in the vertical direction are each 6 or less, and the foam base has an interlaminar strength of 20 N/cm or more. With this adhesive tape, good followability to an adherend and excellent impact resistance can be realized. The adhesive tape of the present invention can be suitably used in portable electronic devices, such as smartphones, tablets, notebooks, and game machines, whose screen size has been increasing and for which a requirement for flexible design is high.

Abstract: A magnetic particle type electromagnetic clutch has two clutch discs so disposed that the two discs can be electromagnetically connected together and disconnected. In a space between the two discs are charged magnetic particles. When an excitation current is run through the excitation coil disposed near the two discs to produce a magnetic flux, the two discs and magnetic particles are magnetized to be connected in unison, thereby transmitting a torque from the drive shaft to the driven shaft. The two discs are each secured to the tip end of the shafts. The shaft has two groups of magnetic layers which are rigidly affixed to the shaft and axially spaced. Each of the groups of magnetic layers is directed + 45 degrees or - 45 degrees with respect to the axis of the shaft. When the shafts start to rotate, magnetostriction is developed in the respective magnetic layers resulting in a change in permeability.

Abstract: A magnetic particle-type electromagnetic coupling apparatus is cooled by a plurality of heat pipes which are partially embedded in the outer periphery of a rotating coupling member near the portion of the coupling member which is in contact with magnetic particles during operation. Heat is removed from the coupling member by a working fluid which is sealed within the heat pipes and is dissipated to the atmosphere through cooling fins attached to the heat pipes.

Abstract: A compact optical scanning system is provided to scan the information content of a document and generate electrical signals representative of the information content thereof. A light emitting linear array is used as an illumination source and a linear imaging device is positioned so as to focus the emitted light as a scanning line onto the document. In one embodiment, the document is moved through a scanning zone and light reflected from scanned lines is collected and converted into electrical signals which can be used to control a remote recorder device.