Abstract: A pest repellent is disclosed having long lasting and high repelling efficacy against sanitary insects such as mosquitoes and which is highly harmless to humans. In at lease one embodiment, the pest repellent contains copaiba oil and/or an extract thereof as well as DEET and/or bisabolol.

Abstract: A spacer between adjacent balls of, for example, a ball screw device or a linear motion device has an outer periphery that is concave such that the spacer is elastically deformed to be in substantially circular line contact with the adjacent balls and that a distance therebetween is variable.

Abstract: When packaging a roll product in which a belt-shaped sensitized material has been wound around a core with a light shielding sheet, the packaging apparatus is capable of forming an angle pleated portion of a gather-folded portion which covers a roll end surface with stability, and the package of roll product is capable of retaining the light shielding property and the moisture resistance while making the area of the sheet as small as possible. The gather-folding apparatus forms angle pleated portions on end surface wrapping material by means of both plate-shaped folding members which come into plane contact from outside of the end surface wrapping material and inter support arms which come into line-contact with the inner peripheral surface of the end surface wrapping material. This gather-folding apparatus forms, by means of both the surfaces of the plate-shaped folding members and the line of the inter support arm, two planes of folded planes sandwiching the line concerned.

Abstract: A spacer between adjacent balls of, for example, a ball screw device or a linear motion device has an outer periphery that is concave such that the spacer is elastically deformed to be in substantially circular line contact with the adjacent balls and that a distance therebetween is variable.

Abstract: When packaging a roll product in which a belt-shaped sensitized material has been wound around a core with a light shielding sheet, the packaging apparatus is capable of forming an angle pleated portion of a gather-folded portion which covers a roll end surface with stability, and the package of roll product is capable of retaining the light shielding property and the moisture resistance while making the area of the sheet as small as possible. The gather-folding apparatus forms angle pleated portions on end surface wrapping material by means of both plate-shaped folding members which come into plane contact from outside of the end surface wrapping material and inter support arms which come into line-contact with the inner peripheral surface of the end surface wrapping material. This gather-folding apparatus forms, by means of both the surfaces of the plate-shaped folding members and the line of the inter support arm, two planes of folded planes sandwiching the line concerned.

Abstract: In a ball screw device comprising a screw shaft and a nut which make relative movement to each other through a multiplicity of balls, as well as in a linear motion device comprising an outer member and an inner member which make the relative movements to each other through the multiplicity of balls, a spacer having two concave surfaces facing respectively to balls, is disposed between the balls adjacent to each other. A section of each of the concave surfaces of the spacer is formed of two circular arcs of which central positions deviate from each other to form a Gothic arch. The spacer has such a configuration that the balls adjacent to each other come into contact with outer edges thereof or portions vicinal to the outer edges. The spacer also has such a configuration that the balls adjacent to each other come into contact with at least three or more outer edge portions thereof or portions vicinal to the outer edges. The spacer may have a through-hole formed in a thinnest portion thereof.

Abstract: When packaging a roll product in which a belt-shaped sensitized material has been wound around a core with a light shielding sheet, the packaging apparatus is capable of forming an angle pleated portion of a gather-folded portion which covers a roll end surface with stability, and the package of roll product is capable of retaining the light shielding property and the moisture resistance while making the area of the sheet as small as possible. The gather-folding apparatus forms angle pleated portions on end surface wrapping material by means of both plate-shaped folding members which come into plane contact from outside of the end surface wrapping material and inter support arms which come into line-contact with the inner peripheral surface of the end surface wrapping material. This gather-folding apparatus forms, by means of both the surfaces of the plate-shaped folding members and the line of the inter support arm, two planes of folded planes sandwiching the line concerned.

Abstract: A linear guide device includes: a plurality of rolling elements; a guide rail extending in an axial direction thereof and including a plurality of rolling element rolling grooves in two side portions thereof, said rolling groove extending in an axial direction of the guide rail; a slider including a plurality of rolling element rolling grooves respectively opposed to said rolling element rolling grooves of said guide rail, said slider being supported on said guide rail in such a manner that said slider is movable along the axial direction of said guide rail through the rolling movements of said rolling elements respectively inserted between said rolling element rolling grooves of said guide rail and said rolling element rolling grooves of said slider, said slider including a rolling element endless circulation track along which said rolling elements are allowed to circulate endlessly; and a plurality of separators, each interposed between said adjoining rolling elements in the circulation direction of said ro

Abstract: In a ball screw device comprising a screw shaft and a nut which make relative movement to each other through a multiplicity of balls, as well as in a linear motion device comprising an outer member and an inner member which make the relative movements to each other through the multiplicity of balls, a spacer having two concave surfaces facing respectively to balls, is disposed between the balls adjacent to each other. A section of each of the concave surfaces of the spacer is formed of two circular arcs of which central positions deviate from each other to form a Gothic arch. The spacer has such a configuration that the balls adjacent to each other come into contact with outer edges thereof or portions vicinal to the outer edges. The spacer also has such a configuration that the balls adjacent to each other come into contact with at least three or more outer edge portions thereof or portions vicinal to the outer edges. The spacer may have a through-hole formed in a thinnest portion thereof.

Abstract: When packaging a roll product in which a belt-shaped sensitized material has been wound around a core with a light shielding sheet, the packaging apparatus is capable of forming an angle pleated portion of a gather-folded portion which covers a roll end surface with stability, and the package of roll product is capable of retaining the light shielding property and the moisture resistance while making the area of the sheet as small as possible. The gather-folding apparatus forms angle pleated portions on end surface wrapping material by means of both plate-shaped folding members which come into plane contact from outside of the end surface wrapping material and inter support arms which come into line-contact with the inner peripheral surface of the end surface wrapping material. This gather-folding apparatus forms, by means of both the surfaces of the plate-shaped folding members and the line of the inter support arm, two planes of folded planes sandwiching the line concerned.

Abstract: A wide-width photographic film is adjusted to have a predetermined supply speed V1 by a sheet feed roller operated by a motor, and it is supplied between upper blades and lower blades. The wide-width photographic film is pressed by an upper blade-pressing mechanism, and it is cut between the upper blades operated by an AC servo motor and rotated at a predetermined circumferential speed V2, and the lower blades operated by the motor and rotated at a predetermined circumferential speed V3. In this process, V1 ×0.1<V2<V1×0.5 is satisfied.

Abstract: A linear guide device is provided with a plurality of rolling elements. A guide rail extending in an axial direction thereof and including a plurality of rolling element rolling grooves in two side portions thereof is provided in the device, wherein the rolling grooves extend in an axial direction of the guide rail. A slider includes a plurality of rolling element rolling grooves respectively opposed to the rolling element rolling grooves of the guide rail, wherein the slider is supported on the guide rail in such a manner that the slider is movable along the axial direction of the guide rail through the rolling movements of the rolling elements respectively inserted between the rolling element rolling grooves of the slider. The slider includes a rolling element endless circulation track along which the rolling elements are allowed to circulate endlessly; and a plurality of separators, each interposed between the adjoining rolling elements in the circulation direction of the rolling elements.

Abstract: In order to reduce the amount of play of balls in a circulation path in a linear guide device to thereby reduce the noise during the running of the linear guide device and improve the quality and productivity of the device, the communicating portion of the straight portion of a ball circulation path in a slider body and the curved portions of ball circulation paths in end caps is constituted by faucet-fitting comprising a cylindrical convex portion provided so as to extend the curved portions relative to the communicating portion and a cylinder concave portion corresponding to the cylindrical convex portion provided in the straight portion.

Abstract: In a ball screw device comprising a screw shaft and a nut which make relative movement to each other through a multiplicity of balls, as well as in a linear motion device comprising an outer member and an inner member which make the relative movements to each other through the multiplicity of balls, a spacer having two concave surfaces facing respectively to balls, is disposed between the balls adjacent to each other. A section of each of the concave surfaces of the spacer is formed of two circular arcs of which central positions deviate from each other to from a Gothic. The spacer has such a configuration that the balls adjacent to each other come into contact with outer edges thereof or portions vicinal to the outer edges. The spacer also has such a configuration that the balls adjacent to each other come into contact with at least three or more outer portions thereof or portions vicinal to the outer edges. The spacer may have a through-hole formed in a thinnest portion thereof.

Abstract: When balls 3 are discharged from a nut 102 in accordance with relative axial movement of the nut 102 and a screw shaft 1, in order to prevent the balls 3 from contacting with thread grooves 102a and 1a of the nut 102 and the screw shaft 1 at three points, a counterbore 102c is formed around the thread groove 102a of the nut 102 in the vicinity of a discharge port for the balls 3 in the nut 102. When the balls 3 are contacted with the thread grooves 102a and 1a, therefore, a four-point contact is always maintained. Consequently, reaction forces which are applied from the thread grooves 102a and 1a to the balls 3 balance with each other, whereby stable holding of the balls 3 is ensured.

Abstract: In order to prevent balls 3 from, when the balls 3 are discharged from a nut 102 in accordance with relative axial movement of the nut 102 and a screw shaft 1, contacting with thread grooves 102a and 1a of the nut 102 and the screw shaft 1 at three points, a counterbore 102c is formed around the thread groove 102a of the nut 102 in the vicinity of a discharge port for the balls 3 in the nut 102. When the balls 3 are contacted with the thread grooves 102a and 1a, therefore, a four-point contact is always maintained. Consequently, reaction forces which are applied from the thread grooves 102a and 1a to the balls 3 balance with each other, whereby stable holding of the balls 3 is ensured.

Abstract: This invention relates to a culture medium used to efficiently propagate and acclimatize tissue cultured plantlets and thereafter obtain mature plantlets, a method to produce said medium, and a tissue culture method using said medium. The plant tissue culture medium is a novel plant tissue culture medium comprised in the main of vermiculite with an average particle diameter between 0.1-10 mm and cellulose fibers of an average fiber length between 0.01-5 mm. The culture method uses said culture medium in a light-transmissible container equipped at least in part with a porous gas permeable film, preferably having an air permeability between 1-50 sec/100 ml as measured in accordance with JIS standard P8117. The solid culture medium formed from a specific type of vermiculite and cellulose fibers enables the culturing process as a whole to be performed easily and efficiently.

Abstract: End caps are respectively joined to opposite ends of a slider main body of a linear guide apparatus. Each end cap has curved passage for bringing the load rolling-element rolling groove of the slider main body into communication with the rolling-element return passage to thereby construct a rolling-element circulating passage for circulating a plurality of rolling elements. At least a portion of the end caps in contact with at least one of the rolling elements and guide rail is made of an oil containing material.

Abstract: A feeding apparatus provides a base; a movable body elongated in a longitudinal direction orthogonal to a moving direction of the movable body on the base; a pair of linear guide devices arranged on the base in parallel with each other, for guiding the movable body in the moving direction; a linear drive device mounted on the base for moving the movable body along the linear guide device; and an attitude stabilizing device mounted on the base for restraining a yawing motion of the movable body, the attitude stabilizing device including at least one transmission member, first and second fastening points formed in the movable body for fixing the transmission member, the first and second fastening points being separated from each other in the longitudinal direction, and first and second direction-changing devices mounted on the base and separated from each other in the moving direction.

Abstract: A feeding apparatus provides a base; a movable body elongated in a longitudinal direction orthogonal to a moving direction of the movable body on the base; a pair of linear guide devices arranged on the base in parallel with each other, for guiding the movable body in the moving direction; a linear drive device mounted on the base for moving the movable body along the linear guide device; and an attitude stabilizing device mounted on the base for restraining a yawing motion of the movable body, the attitude stabilizing device including at least one rope member, first and second fastening points formed in the movable body for fixing the rope member, the first and second fastening points being separated from each other in the longitudinal direction, and first and second direction-changing devices mounted on the base and separated from each other in the moving direction.