Abstract: A cylindrical secondary battery includes a bottomed cylindrical battery case having an opening, an electrode group, an electrolyte solution, and a sealing member blocking the opening of the battery case. The electrode group includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a negative electrode current collector and a negative electrode mix layer placed on at least one principal surface of the negative electrode current collector. The negative electrode mix layer includes a non-facing region not facing the positive electrode mix layer. The density of the negative electrode mix layer is 1.25 g/cm3 to 1.43 g/cm3, the ratio of the entire length of the non-facing region to the entire length of the negative electrode mix layer is 0.09 or more, and the inside diameter of a hollow section of the electrode group is 2.0 mm or less.

Abstract: A cylindrical secondary battery includes a bottomed cylindrical battery case having an opening, an electrode group, an electrolyte solution, and a sealing member blocking the opening of the battery case. The electrode group includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a negative electrode current collector and a negative electrode mix layer placed on at least one principal surface of the negative electrode current collector. The negative electrode mix layer includes a non-facing region not facing the positive electrode mix layer. The density of the negative electrode mix layer is 1.25 g/cm3 to 1.43 g/cm3, the ratio of the entire length of the non-facing region to the entire length of the negative electrode mix layer is 0.09 or more, and the inside diameter of a hollow section of the electrode group is 2.0 mm or less.

Abstract: An aspect of the present invention relates to a cylindrical secondary battery including a bottomed cylindrical battery case having an opening, an electrode group, an electrolyte solution, the electrode group and the electrolyte solution being housed in the battery case, and a sealing member blocking the opening of the battery case. The electrode group includes a positive electrode, a negative electrode, and a separator placed between the positive electrode and the negative electrode and is formed by winding the positive electrode and the negative electrode with the separator therebetween. The negative electrode includes a negative electrode current collector and a negative electrode mix layer formed on at least one principal surface of the negative electrode current collector. The positive electrode includes a positive electrode current collector and a positive electrode mix layer formed on at least one principal surface of the positive electrode current collector.

Abstract: In a winding-type battery, the first electrode and the second electrode are wound via the separator to form an electrode group having first and second end surfaces. The first electrode includes a first current collector sheet, and a first active material layer formed on a surface of the first current collector sheet. A first current collecting lead is connected to the first electrode. The second electrode includes a second current collector sheet, and a second active material layer formed on a surface of the second current collector sheet. A second current collecting lead is connected to the second electrode. At an end of the first electrode that is disposed on the first end surface and/or an end of the first electrode that is disposed on the second end surface, at least a winding termination portion located on the outermost periphery of the electrode group has a notch.

Abstract: In a winding-type battery, the first electrode and the second electrode are wound via the separator to form an electrode group having first and second end surfaces. The first electrode includes a first current collector sheet, and a first active material layer formed on a surface of the first current collector sheet. A first current collecting lead is connected to the first electrode. The second electrode includes a second current collector sheet, and a second active material layer formed on a surface of the second current collector sheet. A second current collecting lead is connected to the second electrode. At an end of the first electrode that is disposed on the first end surface and/or an end of the first electrode that is disposed on the second end surface, at least a winding termination portion located on the outermost periphery of the electrode group has a notch.

Abstract: A sealing body for cylindrical batteries includes a clad material that has a first surface and a second surface opposite to the first surface. The clad material includes a first metal layer made of a first metal on the first surface side, and a second metal layer made of a second metal on the second surface side. The clad material is formed so as to include a central portion having a projecting terminal portion, and a collar portion disposed on a rim of the central portion integrally with the central portion. The clad material includes the terminal portion on the first surface side, and a lead welding surface on the second surface side. The first metal has a rigidity higher than that of the second metal.

Abstract: In a winding-type battery, the first electrode and the second electrode are wound via the separator to form an electrode group having first and second end surfaces. The first electrode includes a first current collector sheet, and a first active material layer formed on a surface of the first current collector sheet. A first current collecting lead is connected to the first electrode. The second electrode includes a second current collector sheet, and a second active material layer formed on a surface of the second current collector sheet. A second current collecting lead is connected to the second electrode. At an end of the first electrode that is disposed on the first end surface and/or an end of the first electrode that is disposed on the second end surface, at least a winding termination portion located on the outermost periphery of the electrode group has a notch.

Abstract: A switch for use with an electric power tool equipped with a trigger switch. The trigger switch has first contacts for turning on and off a motor, second contacts for turning on and off a speed controller, and a trigger lever. The first contacts are formed by a first fixed contact formed on a second conductive plate and a first movable contact formed on a swingable movable contact plate located opposite to the first fixed contact. The second contacts are formed by a second fixed contact and a second movable contact mounted opposite to the second fixed contact formed on a first conductive plate. The second movable contact is located around the front end of a slide plate slidably supported on the trigger lever. The second fixed contact and sliding plate portion are arranged parallel to the first fixed contact and the support member.

Abstract: A switch for use with an electric power tool equipped with a trigger switch. The trigger switch has first contacts for turning on and off a motor, second contacts for turning on and off a speed controller, and a trigger lever. The first contacts are formed by a first fixed contact formed on a second conductive plate and a first movable contact formed on a swingable movable contact plate located opposite to the first fixed contact The second contacts are formed by a second fixed contact and a second movable contact mounted opposite to the second fixed contact formed on a first conductive plate. The second movable contact is located around the front end of a slide plate slidably supported on the trigger lever. The second fixed contact and sliding plate portion are arranged parallel to the first fixed contact and the support member.

Abstract: A recording instrument comprises a recording device for recording with an ink, an ink storage container and an ink supplying system for supplying ink from the ink storage container to the recording device characterized in that the ink supplying system has a liquid contacting surface comprising at least one of the components in a dye or at least one compound having at least one hydrophilic group, adsorbed on or penetrated into the surface.

Abstract: A method for manufacturing a switch includes the steps of forming integrally a clip for clamping a movable contact out of a flat terminal member configured in hoop material by bending uprightly a projected portion of the terminal member, and then insert-molding the thus bent terminal member at the bottom of a box body made of insulating material to hold the integrally formed clip inside the box body.

Abstract: A liquid injection recording apparatus having an orifice for discharging liquid and forming flying drops of liquid, a liquid flow path communicating with the orifice, and flying liquid drop forming means for forming flying drops of liquid from the orifice is provided with a discharge energy adjusting portion having a bubble generating portion communicating with the liquid flow path and means for causing bubbles to be generated in the bubble generating portion.

Abstract: A liquid jet recording method using a recording head provided with a liquid jet part comprising an orifice through which the liquid is jetted to form a flying liquid droplet and a heat action section in communication with said orifice in which section the thermal energy for jetting the liquid acts on said liquid, and an electro-thermal transducer serving as means for generating the thermal energy, said method characterized in that said thermal energy is made to act on the liquid filling said heat action section so as to jet from said orifice such amount of liquid sufficient enough to include unnecessary bubbles generated in said liquid jet part and a liquid droplet is formed by said jetted liquid whereby said unnecessary bubbles are eliminated from said liquid jet part while repeating said liquid droplet formation to perform recording with said droplets. Further, said method is characterized by applying to said electro-thermal transducer a driving signal having a voltage value in the range of 1.02 to 1.

Abstract: In a liquid injection recording apparatus having discharge ports for discharging liquid and forming flying droplets, liquid flow paths communicating with the discharge ports, and energy generating means generating energy for causing the liquid to be discharged from the discharge ports, when the shortest length from the center line of the discharge ports to the central position of the energy acting surface of the energy generating means is a and the length from the center line of the discharge ports to the bottom surface of the liquid flow paths just beneath the center of the discharge ports is b, the value of a/b is 50 or less.

Abstract: A liquid injection recording apparatus has liquid flow paths communicating with an inflow path for supplying liquid and with an outflow path for discharging the liquid and having in the intermediate portions thereof discharge ports for discharging the liquid and forming flying drops of liquid, and a liquid projection energy generating member for forming the drops of liquid. The liquid is forcibly discharged from the outflow path.

Abstract: A recording liquid comprising an aqueous liquid composition containing a water-soluble dye as recording agent is characterized in that the content of m-phenylenediamine in said composition is 1000 ppm or less.