Abstract: A driving tool is provided with a contact arm 11 which can be moved in a vertical direction along an eject path 6 of a nose part 4 disposed in a lower portion of a tool body 2. When driving a nail, the contact arm 11 is moved upward with respect to the nose part 4 to thereby activate an operation of a trigger 10 which is used to operate a starting trigger valve 12. The contact arm 11 is held between two upper and lower springs 20 and 21 which are respectively disposed in a vicinity of the nose part 4. The contact arm 11 is urged by the upper spring 23 so that a lower end of the contact arm projects downwardly beyond a lower end of the nose part 4.

Abstract: A driving tool is provided with a magazine 5, a striking mechanism for driving out a fastener, a contact mechanism for activating the operation of a trigger. A first idle driving preventive lever 17 is rotatable in a horizontal direction and capable of entering into and exiting form a fastener supply path 12 of a magazine. The contact mechanism includes a lower arm 21 which can be projected beyond a leading end of a nose part, an intermediate member 22 interlocking with the lower arm 21 and interlocking with the first idle driving preventive lever 17, and an upper arm 23 interlocking with a trigger. The intermediate member 22 includes a second idle driving preventive lever 32 which can engage with and disengage from the upper arm 23. The intermediate member 22 and lower arm 21 are urged downward. When the first idle driving preventive lever 17 enters into the magazine to rotate and the intermediate member 22 rotates, an engagement between a second idle driving preventive lever 32 and upper arm 23 is canceled.

Abstract: A contact top 8 is arranged at a lower end of a wear plate 6 provided on a lower side of a tool main body 1. The contact top 8 is attached to and detached from a front end of a contact arm 12 provided at a vicinity of an injection port. An engaging groove 26 is formed at a side portion of the contact top 8. The contact top 8 is made to be movable such that the engaging groove 26 comes out from and goes into a lower end of a side portion of a driver guide 5. A front end portion 17 of the contact arm 12 is made to be able to be brought into contact with and separate from the contact top 8. In a state of maximally moving the front end portion 17 to the lower side, the contact arm 12 is capable of being attached to and detached from the engaging groove 26 of the contact top 8 exposed from a lower end between a wear plate 6 and the driver guide 5.

Abstract: A nailing machine is provided with a nailing machine body 1 in which a contact arm 16 is arranged so as to slide along a nose portion 10, and a plurality of contact noses 2 (3) having different inside diameters. The contact noses 2(3) can be mounted to and dismounted from a lower end of the contact arm 16, and nails having different diameters can be used by exchanging the contact noses 2 (3). The inside diameter of the nose portion 10 is so formed as to fit to a large nail 21 having the largest head diameter among the nails to be used. A diameter of a driver 5 is so formed as to fit to the contact nose 2 (3) for a small nail 22 having the smallest head diameter. A conical pipe portion 25 which is upwardly enlarged in diameter for guiding a nail tip is formed in an upper part of the contact nose 2(3). An upper end of this conical pipe portion 25 is so formed as to have a larger diameter than that of the nose portion 10.

Abstract: A contact nose 15, in which an ejection opening 24 is formed coaxially with an ejection opening 18 of a nose portion 13 that guides a driver slidably, is slidably provided at an end part of the nose portion 13 to be urged in a direction of an end portion of the ejection opening 18. A guide slope 28 adapted to guide a tip end of a nail, which is hammered out tiltingly from the ejection opening 18 of the nose portion 13, into the ejection opening 24 is formed on an upper rear side of the ejection opening 24 of the contact nose 15.

Abstract: A contact nose 15, in which an ejection opening 24 is formed coaxially with an ejection opening 18 of a nose portion 13 that guides a driver slidably, is slidably provided at an end part of the nose portion 13 to be urged in a direction of an end portion of the ejection opening 18. A guide slope 28 adapted to guide a tip end of a nail, which is hammered out tiltingly from the ejection opening 18 of the nose portion 13, into the ejection opening 24 is formed on an upper rear side of the ejection opening 24 of the contact nose 15.

Abstract: A ratchet member 23, which is provide with a slope 24 for guiding a tip end of a nail inclined to a rear side of an ejection opening 7 into the ejection openings 7 and 16, and a guide surface 25 for guiding the tip end of a nail to the center of each of the ejection openings 7 and 16, is provided on a rear side of ejection openings 7 and 16 and urged so that a guide surface 25 of the ratchet member 23 enters the ejection openings 7 and 16.

Abstract: There is provided a laminated film for optical use comprising a polyester film which has a lubricity layer containing globular particles in at least one side thereof, wherein the laminated film has a thickness irregularity of 0.5 to 7.0%, and wherein the polyester film contains inert particles derived from catalysts and the amount of the inert particles determined by a dark-field microscopy satisfies the following conditions: the number of inert particles having a particle size of from 1 to 10 ?m is 200 to 20,000/mm2; and the number of inert particles having a particle size of greater than 10 ?m is 10/mm2 or less. The laminated film for optical use which is improved in uniformity, transparency, lubricity, color tone and scratch resistance, which deposits only a reduced amount of low molecular materials, and which is excellent in the adhesion to a layer adopted for various optical purposes.

Abstract: There is provided a laminated film for optical use comprising a polyester film which has a lubricity layer containing globular particles in at least one side thereof, wherein the laminated film has a thickness irregularity of 0.5 to 7.0%, and wherein the polyester film contains inert particles derived from catalysts and the amount of the inert particles determined by a dark-field microscopy satisfies the following conditions: the number of inert particles having a particle size of from 1 to 10 ?m is 200 to 20,000/mm2; and the number of inert particles having a particle size of greater than 10 ?m is 10/mm2. The laminated film for optical use which is improved in uniformity, transparency, lubricity, color tone and scratch resistance, which deposits only a reduced amount of low molecular materials, and which is excellent in the adhesion to a layer adopted for various optical purposes.

Abstract: A forced oscillatory flow type heat pipe of which a ratio (motion coefficient) of the heat transport capacity to the oscillating energy is maintained within an appropriate range is provided. A heat pipe body (1) has a closed loop flow path (2). Operation of the vibrator (3), which is provided at a connecting portion (2a) between the ends of the flow path (2), causes an oscillatory flow of the charged liquid sealed in the flow path (2). The phases of the oscillatory flows of the charged liquid in the adjacent tube portions of the flow path are inverted. From a viewpoint that the dimensionless effective thermal diffusivity kef* of the COSMOS type heat pipe has a larger range in the modified Womersley number &agr; than that of the dream type heat pipe, the modified Womersley number &agr; is 0.4 to 7.

Abstract: An approach prevention wall for preventing a head portion of a lead nail from unnecessarily approaching is protruded on a front inner wall of the nose section of the nailing machine. The nose section accommodates the lead nail of connected nails, and the connected nails are connected with a connecting member. A lower end face of the approach prevention wall is inclined, and the inclined face of the lower end face of the approach prevention wall is formed at a position where the height of the inclined face is substantially the same as that of a position where the connecting member to connect the lead nail with the next nail is cut off at the time of driving the lead nail. Otherwise, the inclined face of the lower end face of the approach prevention wall is formed at a position where its height is higher than that.

Abstract: A contact mechanism includes a contact top disposed on an outer peripheral portion of a leading end portion of a nose in such a manner that it is slidable along an axial direction of the nose, and a hollow nose top held by the contact top and including an ejection opening formed in front of an ejection opening formed in the nose in such a manner that the ejection opening of the nose top is connected continuously with the ejection opening of the nose. The contact top is connected to an adjuster mechanism through a contact arm and, at the same time, the contact top can be guided by the outer peripheral surface of the leading end portion of the nose.

Abstract: A forced oscillatory flow type heat pipe of which a ratio (motion coefficient) of the heat transport capacity to the oscillating energy is maintained within an appropriate range is provided. A heat pipe body (1) has a closed loop flow path (2). Operation of the vibrator (3) , which is provided at a connecting portion (2a) between the ends of the flow path (2), causes an oscillatory flow of the charged liquid sealed in the flow path (2). The phases of the oscillatory flows of the charged liquid in the adjacent tube portions of the flow path are inverted. From a viewpoint that the dimensionless effective thermal diffusivity kef* of the COSMOS type heat pipe has a larger range in the modified Womersley number &agr; than that of the dream type heat pipe, the modified Womersley number &agr; is 0.4 to 7.

Abstract: A contact mechanism includes a contact top disposed on an outer peripheral portion of a leading end portion of a nose in such a manner that it is slidable along an axial direction of the nose, and a hollow nose top held by the contact top and including an ejection opening formed in front of an ejection opening formed in the nose in such a manner that the ejection opening of the nose top is connected continuously with the ejection opening of the nose. The contact top is connected to an adjuster mechanism through a contact arm and, at the same time, the contact top can be guided by the outer peripheral surface of the leading end portion of the nose.

Abstract: An approach prevention wall for preventing a head portion of a lead nail from unnecessarily approaching is protruded on a front inner wall of the nose section of the nailing machine. The nose section accommodates the lead nail of connected nails, and the connected nails are connected with a connecting member. A lower end face of the approach prevention wall is inclined, and the inclined face of the lower end face of the approach prevention wall is formed at a position where the height of the inclined face is substantially the same as that of a position where the connecting member to connect the lead nail with the next nail is cut off at the time of driving the lead nail. Otherwise, the inclined face of the lower end face of the approach prevention wall is formed at a position where its height is higher than that.

Abstract: Wallpaper comprising flame retardant paper having laminated thereon an expanded sheet is disclosed, in which the expanded sheet is obtained by expanding at an expansion ratio of 1.5 or more a resin composition containing (A) 100 parts by weight of an ethylene-.alpha.-olefin copolymer having a melt flow rate of from 0.2 to 50 g/10 min, a density of not more than 0.91 g/cm.sup.3, and a maximum melting peak temperature of 100.degree. C. or higher and a heat of fusion at 100.degree. C. or higher of 10 J/g or more as measured with a differential scanning calorimeter and (B) 60 parts by weight or more of magnesium hydroxide or a mixture of magnesium hydroxide and aluminum hydroxide at a weight ratio of from 100/0 to 20/80. The wallpaper has high safety, is free from bleeding of a plasticizer, gives off no offensive odor, and satisfies the requirements of 2nd class (semi-noncombustible) of fireproof wall coverings.

Abstract: A silk-like polyethylene plastic film is disclosed, comprising an extrusion molded film of a mixture of (A) an ethylene/methacrylate copolymer having a methacrylate content of from 10 to 40 weight % and an MFR of from 0.5 to 40 g/10 min. with (B) polyethylene having an MFR of from 0.02 to 5.0 g/10 min., said mixture having amethacrylate content of from 7 to 25 weight % and an MFR ratio of the component (A) to the component (B) of from 0.05 to 120.This silk-like film has no reflective gloss, opacity, soft and smooth touch, and which sounds low when it is crumpled. Thus it is preferably used as throwaway rainwears, medical sheets, etc.