Abstract: It is an object of the present invention to provide a retainer cone that, by internally inserting the retainer cone into the central portion at the upper end portion of the retainer main body, which is an area, where negative pressure is generated, in the vicinity of the attaching portion of a prior art venturi tube, is capable of dispersing a part of the compressed air jetted from a nozzle at the upper part of the retainer main body, when carrying out reverse air filtration of a filtration fabric, in the radius direction of the retainer main body, preventing negative pressure from being generated at the upper end side of the retainer main body, outwardly inflating the entire filtration fabric including the upper end side of the retainer main body, securely shaking off powder dust adhered to the filtration fabric, and simultaneously enlarging the sectional area of a flow path at the upper end portion of the retainer main body in comparison with a prior art venturi type, and significantly reducing the load of

Abstract: The objective of the present invention is to provide a titanium alloy vacuum container and vacuum parts that can easily achieve an ultra-high vacuum in a short time through vacuum evacuation. The titanium alloy of the titanium alloy vacuum container and vacuum parts has a compact structure composed of fine grains, each having a size of approximately not more than 10 ?m, with a surface that is exposed to at least vacuum being set to have a surface roughness of not more than 50 nm; and in this structure, preferably, the surface roughness thereof may be set to not more than 10 nm, the titanium alloy may have a hardness in a range of not less than 230 Hv to not more than 310 Hv, and the titanium alloy may have a passivity surface film made by a thin titanium oxide layer or nitride layer that is formed on the surface thereof. The titanium alloy, which is desirably used in such titanium alloy vacuum container and vacuum parts, contains 0.3 wt. % to 0.5 wt. % of iron and 0.3 wt. % to 0.5 wt.

Abstract: Apparatus for providing adhesive strips having a predetermined length includes a rotatable reel for support of a roll of adhesive tape. A conveyor, which may be a rotatable turn table, is provided for supporting thereon a plurality of adhesive strips which have been cut to a predetermined length from the roll of adhesive tape. A feed member is pivotably supported adjacent one end thereof for movement between a first position adjacent the reel and a second position adjacent the conveyor. The feed member carries a stationary cutter plate and a cutter bar which is reciprocable therealong and is cooperable with the cutter plate to cut adhesive tape withdrawn from the reel into strips of the predetermined length. The feed member carries at its outer end a latch plate for selectively grasping and retaining the free end of adhesive tape withdrawn from the reel. A lever rod is carried by the feed member and is movable longitudinally thereof and is operably connected to the latch plate.