Abstract: A nonaqueous secondary battery comprising a positive electrode and a negative electrode both containing a material capable of reversibly intercalating and deintercalating lithium, a nonaqueous electrolyte containing a lithium salt, and a separator, which has a least one protective layer on the negative electrode and/or the positive electrode. The battery has a high discharge potential, satisfactory charge and discharge cycle characteristics, and high safety.

Abstract: A nonaqueous secondary battery comprising a positive electrode and a negative electrode both containing a material capable of reversibly intercalating and deintercalating lithium, a nonaqueous electrolyte containing a lithium salt, and a separator, which has a least one protective layer on the negative electrode and/or the positive electrode. The battery has a high discharge potential, satisfactory charge and discharge cycle characteristics, and high safety.

Abstract: A nonaqueous secondary battery comprising a positive electrode and a negative electrode both containing a material capable of reversibly intercalating and deintercalating lithium, a nonaqueous electrolyte containing a lithium salt, and a separator, which has at least one protective layer on the negative electrode and/or the positive electrode. The battery has a high discharge potential, satisfactory charge and discharge cycle characteristics, and high safety.

Abstract: A nonaqueous secondary battery is disclosed, comprising a positive electrode sheet having on a current collector an electrode material mixture layer containing a lithium-containing transition metal oxide as a positive electrode active material, a negative electrode sheet having on a current collector an electrode material mixture layer containing a negative electrode material capable of intercalating and deintercalating lithium, and a nonaqueous electrolyte containing a lithium salt, wherein in at least one of said positive electrode sheet and said negative electrode sheet, in the case of the positive sheet, a layer containing no positive electrode active material is provided between plural electrode material mixture layers containing the positve electrode active material or between the electrode material mixture layer and the current collector; and in the case of the negative electrode sheet, a layer containing no negative electrode material capable of intercalating and deintercalating lithium is provided be

Abstract: A plurality of embossing rollers different in circumferential arrangement pitch of uneven portions formed thereon for embossing are provided, and the embossing rollers are urged against an outer circumferential surface of a plastic web so that a plurality of stripes of embossed surface portions are formed on each of the opposite side edges of the plastic web, the embossed surface portions being different from each other in the arrangement pitch of uneven portions.

Abstract: A method for detection of the edge and/or shape of transparent films, wherein the incident rays from a light source enter a polarizer to yield the linearly polarized light for irradiation to a transparent film with a property of rotatory polarization, and the rotatorily polarized light therefrom is transmitted through an analyzer with a polarization axis orthogonal to that of the polarizer, allowing the transmitted light to indicate the edge position and/or shape of the transparent film. An apparatus for detection of the edge and/or shape of transparent films, which is furnished with a polarizer, analyzer and detector to utilize the property of rotatory polarization of a transparent film placed between the polarizer and the analyzer, wherein the polarizer linearly polarizes the incident rays from a light source, emitting the light to be fed to the analyzer, a polarization axis of which is orthogonal to that of the polarizer, and the detector recognizes the output of the analyzer.

Abstract: A process for consecutively coating both sides of a continuously travelling web, which comprises coating a first coating solution onto a first side of a continuously travelling web to form a coated layer thereon, supplying a second coating solution while the coated layer on the first side of the travelling web is still in a non-dry state, using a bar which is supported by a supporting member and which rotates in contact with the web in the same direction as the travelling direction of the web in such a manner that a liquid pool of the second coating solution is formed immediately before the position where the bar comes into contact with the web while supporting the first coated side of the web with a pressurized gas, and applying the second coating solution to the second side of the web opposite to the first coated side using the bar.