530results about How to "Stretch smoothly" patented technology

There is provided a porous membrane of vinylidene fluoride resin which has pores of appropriate size and distribution and also excellent mechanical strength represented by tensile strength and elongation at break and is useful as a microfiltration membrane or a separator for batteries. The porous membrane of vinylidene fluoride resin is characterized by the presence in mixture of a crystalline oriented portion and a crystalline non-oriented portion as confirmed by X-ray diffraction, and is produced by subjecting a melt-extruded composition obtained by mixing a vinylidene fluoride resin having a molecular weight distribution which is appropriately broad and high as a whole with a plasticizer and a good solvent for vinylidene fluoride resin, to cooling for solidification from one surface, extraction of the plasticizer and stretching.

The invention relates to a novel preparation technology of polyoxymethylene fiber, in particular to the novel preparation technology of the polyoxymethylene fiber via multi-stage slow cooling and three-stage drawing with different media, which comprises the following steps: vacuum-drying polyoxymethylene granular materials, heating and melting via a screw extruder, melting and extruding by a spinneret, leading small melt flow to pass through the multi-stage slow cooling, carrying out high-speed traction, passing through a moistening and oiling cluster, winding, then obtaining as-spun fiber, carrying out hot air drawing and two times of drawing with different types of solvent, then carrying out hot molding and finally preparing the polyoxymethylene fiber. The novel prepration technology can solve the problems of matching between the multiple sections of atmosphere and temperature and the spinning process control and the control of the drawing with multiple media and make up for the deficiencies that the single atmosphere and temperature and the single medium drawing of the prior art lead the structure to be difficult to stable and uniform.

The invention relates to a manufacturing method for superlow shrinkage type PET industrial yarn, which is characterized in that the superlow shrinkage type PET industrial yarn is manufactured through selecting and controlling cooling conditions, and the technological process is as follows: hyperviscous melting to polyester raw materials, metering, spanning, cooling, oil supplying, stretching, hot shaping, and reeled forming. For lowing the irregularity and shrinkage percentage of fiber, a slow cooling device is arranged in the production of industrial yarn, a precooling device adopted is a hollow stepped ring-shaped belt comprising an upper part and a lower part, through holes with the diameters of 5 to 7 mm are uniformly distributed in the upper part of the ring-shaped belt, through holes with the diameters of 3 to 4 mm are uniformly distributed in the lower part, and the hole arrangement densities are the same. The natural target of the PET industrial yarn is as follows: the fracture strength is equal or greater than 7.0 cN/dtex, the breaking elongation is 20.0 plus or minus 1.5 percent, and the dry heat shrinkage percentage under the test conditions of 170 DEGC, 0.05cN/dtex reaches 1.9 plus or minus 0.25 percent.

A securement device for an intravenous, winged needle set, which comprises: an inverted U-shaped, self-supporting strap, the strap having vertical legs attached to a central portion of a base. The base has a bottom to rest on the skin of the patient. A portion of the base forward of the strap has an upper surface that slopes downwardly to a forward end at an angle to the skin and the bottom of the base. Improved retention and ease of application is provided with such a device.

An umbrella structure includes a cover, a shaft, a notch, a runner, main ribs and stretchers. The notch is extended downward to form a fixing portion. The fixing portion has one end disposed with a protruding loop section, and an appropriate position disposed with a fastening orifice for corresponding with the protruding button. The runner is accommodated at the fixing portion, and is capable of up-and-down sliding movements at the fixing portion. When stretching the umbrella, the protruding button at the fastening device is steadily locked at the fastening orifice at the fixing portion to smoothly stretch the umbrella. When collapsing the umbrella, the shaft is stored in the fixing portion to prevent the shaft from damages and deformations by offering the shaft with appropriate protection. Using the aforesaid structure, a drawback as being incapable of securely stretching the umbrella due to a reduced volume of the umbrella is solved.

The invention provides a sliding york which can process stretching movement swimmingly and reduce cost even if a carry object has heavy weight or stretching stroke. The sliding york apparatus (1) includes a fixing york (11), a middle york (21) supported to slide along length direction relative to the fixing york (11), and a front york (31) supported to slide along length direction relative to the middle york (21). A drive pinion driven by a rotary drive device (2) mounted on the fixing york (11) engages with a rack (22) mounted on the middle york (21) in the sliding york apparatus (1). All movable yorks (the middle york (21) and the front york (31)) are driven directly by the rotary drive device (2).

A preform for manufacturing plastics material bottles or wide-necked vessels is described, having a rigid, substantially elongate, frustoconical body portion that is closed at one of its longitudinal ends by a dome-shaped end portion and at its opposite longitudinal end adjoins via a preform collar a neck portion provided with a pouring opening. The preform possesses in the body portion an external diameter that is reduced from the preform collar to the end portion. The body portion has a wall thickness which changes over its longitudinal extension substantially constantly by up to +2 mm. For this purpose, it possesses an internal diameter which decreases substantially constantly from a transition to the preform collar up to a transition to the dome-shaped end portion.

A preform for manufacturing plastics material bottles or wide-necked vessels is described, having a rigid, substantially elongate, frustoconical body portion that is closed at one of its longitudinal ends by a dome-shaped end portion and at its opposite longitudinal end adjoins via a preform collar a neck portion provided with a pouring opening. The preform possesses in the body portion an external diameter that is reduced from the preform collar to the end portion. The body portion has a wall thickness which changes over its longitudinal extension substantially constantly by up to +2 mm. For this purpose, it possesses an internal diameter which decreases substantially constantly from a transition to the preform collar up to a transition to the dome-shaped end portion.

A method of encoding a video signal of a 2D image with conversion data to assign in the conversion of said video signal to left and right eye images for stereoscopic display, including adding conversion data to a video signal of the 2D image to provide an encoded signal, the conversion data defining displacement of respective selected points of the 2D image for converting the 2D image to a format suitable for stereoscopic display, wherein the conversion data enables the creation of the left and right eye images.

The invention relates to a polyfluortetraethylene nanofibre membrane and a preparation method thereof. The aperture distribution of the polyfluortetraethylene nanofibre membrane is concentrated within a range of +/-100 nanometers and occupies more than 90 percent of the total volume of each level aperture; the stretching process of the preparation method adopts low-temperature segmenting stretching, thus the stretching temperature is stable, the polyfluortetraethylene nanofibre membrane is uniformly heated, and giant molecule segmers are equally unfolded; the produced polyfluortetraethylene nanofibre membrane has concentrated aperture distribution and high uniformity so as to generate high water pressure resistance, long water resistant time and high membrane fibering degree, and the obstructing efficiency of bacteria reaches more than 99.99 percent, thereby the polyfluortetraethylene nanofibre membrane can meet the requirement of oil-water separation and high-end gas filtration of an operation isolation mattress with high-pressure steam filtration and high water pressure resistance and can be used in fields of superclean room entering air filtration, and the like, such as medical treatment and health protection, health matter cultivation, semiconductor devices, integrated circuit, medicine, and the like.

A hand-held measuring device including a case and flexible steel spring-biased measuring tape wound about an annular reel fitted within a circular housing within the case, a single battery-powered motor having an output shaft, a driving wheel fixedly mounted on the output shaft of the motor for directly engaging the surface of the tape and thereby pushing the tape out of the case, a first switch mounted on the case for controlling the motor, a pull rod connected to the drive wheel, and a second switch mounted on the case and connected to the pull rod for disengaging the driving wheel from the tape surface.

The invention discloses a manufacturing method for high-modulus low-shrinkage PET industrial yarn, and the technological process of the method is as follows: hyperviscous melting to polyester fiber raw materials, metering, spinning, cooling, oil applying, stretching, hot shaping and reeled forming, wherein the cooling process sequentially comprises four parts including slow-cooling, pre-cooling, calm zone cooling and blow cooling, and the pre-cooling part adopts a passive hollow ring-shaped belt device. Through the introduction of the pre-cooling device, the irregularity caused by tows quivering produced under the down moving of a solidification point of fiber can be reduced, the deviation ratio of linear density can be controlled within a lower range, the purpose of reducing orientation and crystallization of embryo fiber is achieved, finally high-modulus low-shrinkage PET industrial yarn can be obtained, the high-modulus low-shrinkage PET industrial yarn has the advantages of high modulus, low dry heat shrinkage percentage, low breaking elongation and low linear density deviation ratio, and practical application can be well met.

A seat structure includes a seat plate, a backrest plate adjustable in inclination angle, and a bridging member covering up a flexion portion between the seat plate and the backrest plate for bridging the seat plate and the backrest plate smoothly. The bridging member is a member shaped like a thin flat plate having a flexural elasticity and stably supports a baby's buttocks while dispersing a body pressure with its entire surface. This structure can provide such a seat structure that can prevent local loads from acting on the buttocks both in the form of a bed and in the form of a chair.

In a circuit board, when lands provided on a rear surface of a substrate are each separated into a mainland and a sub-land, warping or other defects of the substrate can be ignored when soldering, and the substrate can be mounted with a high bonding strength. On the rear surface of a module substrate, partitions are each provided to separate a metal film into the mainland and the sub-land. Accordingly, when the substrate is mounted on a motherboard, solder applied beforehand from each end-surface electrode to the mainland can be largely protruded downward from the mainland, and warping or other defects of the substrate can be ignored by this protruding portion of the solder. In addition, in the state in which the substrate is mounted, since the solder is pushed out from between the mainland and the motherboard and overflows the partition, both the mainland and the sub-land can be soldered to the motherboard side, and hence stable bonding can be obtained at a large bonding area.

The invention discloses a construction method of bridge seamless type expansion joint. The construction method of the bridge seamless type expansion joint includes the steps of embedding a sealing strip in the seam portion of the expansion joint, pouring melted 502 elastic-plastic bodies, placing a cross-seam aluminum sheet well, paving various high molecular polymers which fit in with the American society for testing material (ASTM) standard layer by layer, wherein the various high molecular polymers are mixed materials of the 502 elastic-plastic bodies and granite of a corresponding grade, finally using granitic plaster as a surface wearing layer, and the bridge seamless type expansion joint is achieved. The construction method of the bridge seamless type expansion joint has the advantages of satisfying stretch and displacement of an upper portion structure of the bridge, guaranteeing that cars run stably, improving riding comfort, and being strong in elastic restoring force, capable of resisting the high and low temperature, good in plasticity, extensibility, durability, waterproof performance and adhesion performance, long in service life, convenient to install, flexible in installation, rapid in traffic openness and the like. In addition, the construction method of the bridge seamless type expansion joint further has the advantage that the extensible displacement is from 20mm to 50 mm.

To provide a hydraulic driving device configured to smoothly extend a hydraulic cylinder. The present invention includes the open circuit E, the closed circuit A, a control device 57, and a control lever 56a. The open circuit E is provided with a flow passage 202 for connecting an outlet port of the open circuit pump 13 and a head chamber 1a of the boom cylinder 1, a selector valve 44a provided in the flow passage 202, a discharge flow passage 404 for connecting a hydraulic fluid tank 25 and a flow passage 200, and a bleed-off valve 64 provided in the discharge flow passage 404. The control device 57 is configured in such a manner that when a manipulate signal for extending the boom cylinder 1 is input from the control lever 56a, the bleed-off valve 64 is closed, the selector valve 44a is subsequently opened, and the open circuit pump 13 is controlled.