125 results about "Pitch length" patented technology

A new machine control method and system for registering pro-produced webs into a converting line producing disposable absorbent articles such as diapers, pants, feminine hygiene articles or a component thereof. The pre-produced web can include a multiplicity of pre-produced objects spaced on the web at a pitch interval in the web direction. The pre-produced web being manipulated in order for the pre-produced object of the web to be registered in relation to a target position constant. The present invention includes three embodiments, where the first embodiment is expressed as a generic claim. The first embodiment includes a closed-loop feedback registration system; the second and third embodiments, in addition, include an open-loop feedforward phasing system. In addition, the third embodiment uses a machine vision system to recognize any element of a complex pre-produced object (e.g., colorful graphics).

An improved extruder (10) is provided which permits successful introduction of very high quantities of injected steam into material being processed, on the order of 6-8% or more by weight steam. The extruder (10) includes an elongated extruder barrel (12) having at least one elongated, axially rotatable, helically flighted extrusion screw (16,18) therein. The barrel (12) is equipped with obliquely oriented steam injection ports (44, 46) along the length thereof, housing steam injectors (48, 50). The barrel (12) includes relatively high free volume steam injection heads (32 and 38, 40) having therein screw sections (78, 82) of relatively long pitch length, together with steam restriction heads (30, 34, and 42) on opposite sides of the injection heads (32, and 38, 40) having therein relatively short pitch length screw sections (76, 80, 84).

A method of forming a low AC loss, fully transposed cabled superconductor from multiple superconducting subconductors cut in a serpentine form from a wider superconducting tape is disclosed. By assembling pre-cut subconductor tapes a cable with a short transposition pitch length can be formed without excessive in-plane or out-of-plane deformation of the tape which could otherwise cause degradation of its superconducting performance. The transposition may be in either Roebel bar or Rutherford cable geometry.

This invention relates generally to tires having treads that have a configuration and/or properties for providing suitable snow and dry traction, and, more specifically, to a tire that has a tread that has a maximum value for sipe density in the contact patch, a minimum value for lateral groove density in the contact patch, and a minimum value for the longitudinal contact surface ratio. In certain embodiments, the pitch length of pitches or repeating units of tread geometry along the circumferential direction of the tire is within a certain range and the tread depth is below a specified value. Tires with treads having a configuration that falls within these design parameters exhibit a desirably good level of snow and dry traction.

Tire treads having one or more repeating pitches, each repeating pitch comprising individual pitches having tread blocks with sipes formed therein and each pitch having a pitch length of between 15 mm and 35 mm. Such treads may also have a weighted average sipe density D_w of between 10 mm⁻¹ and 37 mm⁻¹, which is determined through the disclosed Eq. 2 below. The tread blocks are also formed from a rubber composition based upon a diene elastomer, a plasticizing system and a cross-linking system, wherein the rubber composition has a glass transition temperature of between −40° C. and −15° C. and a shear modulus G* measured at 60° C. of between 0.5 MPa and 1.1 MPa.

A mode filter for eliminating the propagation of higher-order modes along a section of optical multimode fiber comprises a graded index (GRIN) lens, preferably of a quarter-pitch length, and a pinhole element in the form of a small core fiber. This configuration creates a Fourier spatial filter assembly that removes higher order modes propagating along an optical fiber while capturing the fundamental mode of the optical signal. A section of GRIN fiber is preferably used as the lens, with the small core fiber disposed at the output of the GRIN fiber lens to collect substantially only the on-axis fundamental mode of the optical signal. Since the higher order modes are shifted away from the origin by the GRIN fiber lens, only the fundamental mode signal is captured by the small core fiber.

A fluid conduit is provided for use in a hydraulic actuating system for controlling an instrumentality disposed on a rotating portion of a machine. The fluid conduit transports pressurized fluid between a fluid source disposed on a non-rotating portion of the machine and the instrumentality and comprises a rigid tubular member formed in the shape of a helix having at least about 2 revolutions and a non-constant pitch length. The ends of the tube are adapted to be sealingly connected between the fluid source and the instrumentality. The fluid conduit is used, for example, in an apparatus and system for controlling a hydraulic actuator mounted on a rotating blade.

A drill bit comprising a body including at least four flutes being formed on and extending along a longitudinal axis of the body and a web portion disposed between the at least four flutes. The flutes define a pitch length that is substantially the same as one another and the web portion has at least one web thickness. The ratio of the web thickness to the pitch length is within a range of about 14 to 25 percent.

The purpose of the present invention is to provide a pneumatic tire that exhibits excellent operating stability whether the road surface is a dry road surface, a snow covered road surface or a wet road surface. A block pitch length (Po) of an outside block column (22) is greater than a block pitch length (Pi) of an inside block column (24). The tire width direction size in a region sandwiched between two circumferential grooves becomes smaller in the order of ribs (20), the outside block column (22), and the inside block column (24). Inclined grooves (16a) partitioning and forming the ribs (20) are opened only on a circumferential groove (12b) on a vehicle mount inside region partitioning and forming the ribs (20).

A pneumatic tire is configured such that: paired first main grooves extending in a tire circumferential direction are provided on the two sides of a tire equator line in a tread portion, respectively; a distance between a center position of each first main groove and the tire equator line is set at 8% to 20% of a ground contact width W; a first land portion is defined between these first main grooves; multiple sub-grooves each having a curved shape are formed in each of both edge portions of the first land portion at intervals in the tire circumferential direction; one end of each sub-groove is opened to the corresponding first main groove, and the other end of the sub-groove is terminated inside the first land portion; a rib portion continuously extending in the tire circumferential direction is formed in an area of the first land portion on the tire equator line; and a relation between a length (L) of a center line of each sub-groove and a pitch length (P) of the sub-grooves in the tire circumferential direction satisfies 1.1×P≰L≰2.0×P.

A multi-ribbed power transmission belt has transverse grooves in the compression section which are oriented at angles other than perpendicular. The combination of longitudinal grooves and transverse grooves form a plurality of cogs on the belt surface, with a row of cogs being defined between adjacent transverse grooves. Each cog has a pitch length P extending from a location on the cog to the identical location on the longitudinally adjacent cog. The pitch lengths of the rows of cogs are randomized over the entire length of the belt to reduce the noise of the belt as it travels about its associated pulleys.

Provided is a pneumatic tire which employs pitch variation for suppressing pattern noise and has uniformity further improved. Pitches 3a, 3b and 3c with different pitch lengths are formed so that a pitch with a larger pitch length is set to have a smaller groove area ratio, and to have a larger groove wall angle α on the obtuse angle side that is formed by a groove wall of a lateral groove 2 and the direction tangential to the thread surface.

A method of pitching a tread for a tire to achieve a satisfactory noise power spectrum has the steps of: selecting an upper (u) and a lower (l) extreme of pitch ratios; permitting continuous variables of pitch ratios to exist between the upper (u) and lower (l) extreme of pitch ratios; and conducting an optimization of continuous variables between and including the two selected extremes of pitch ratios; wherein the pitch lengths of each tread element can be different in length to control noise and uniformity harmonics. The method may include other optimization steps in a combinatorial fashion such as using an integer programming formulation that determines discrete values of pitch ratios to get a pitch sequence, using genetic algorithm (GA) programming; or any other combinatorial optimization technique.

The heat exchanger (1) comprises: two header pipes (2),(3) arranged in parallel with an interval therebetween; a plurality of flat tubes (4) which are arranged between the header pipes and which place coolant paths (5) provided therein in communication with the interior of the header pipes; a plurality of fins (6) attached to the flat surface of each flat tube; and side sheets (10U), (10D) attached to an outside of the fins (6aU), (6aD), which are positioned farthest outward among the plurality of fins. The side sheet (10D) positioned in the bottom part of the heat exchanger (1) has a plurality of notches (11) formed at intervals from each other on the edge of the side where condensed water collects in the heat exchanger (1). The notches are each provided with a width sufficient for covering the interval pitch (P) of the fin by several pitch lengths.

The invention provides a method for processing a high-performance polyethylene braided wire for a fishing gear or a culture cage, relates to processing of a fishing screen wire, and provides the method for processing the polyethylene braided wire. The method uses a fishing self-reinforcing polyethylene monofilament, and fills a core in the center of the braided wire. The method is characterized in that the core diameter equals to (a wire diameter-2*a yarn diameter) * an empirical factor of a mandrel, and the empirical factor of the mandrel is between 0.980 and 0.990; the number of yarns for the mandrel equals to (the core diameter/the yarn diameter) <2>*an empirical factor of the yarns for the mandrel, and the empirical factor of the yarns for the mandrel is between 0.176 and 0.185; the pitch length is determined by the wire diameter multiplied by the empirical factor of the pitch length, and the empirical factor of the pitch length is between 1.240 and 1.950; the number of strands is 16; the number of the yarns for the strands equals to (pi*the wire diameter* the empirical factor of the number of the yarns for strands)/(16*the yarn diameter); and the empirical factor of the number of the yarns for the strands is between 1.360 and 1.520. The method can be used for processing the high-performance polyethylene braided wire for the fishing gear or the culture cage.

This invention relates generally to tires having treads that have a configuration and/or properties for providing suitable snow and dry traction, and, more specifically, to a tire that has a tread that has a maximum value for sipe density in the contact patch, a minimum value for lateral groove density in the contact patch, and a minimum value for the longitudinal contact surface ratio. In certain embodiments, the pitch length of pitches or repeating units of tread geometry along the circumferential direction of the tire is within a certain range and the tread depth is below a specified value. Tires with treads having a configuration that falls within these design parameters exhibit a desirably good level of snow and dry traction.

A semiconductor laser, such as a vertical cavity, surface emitting laser (VCSEL) is coupled to an optical fiber. The other end of the optical fiber has a reflector, so as to provide a fiber-extended cavity for the VCSEL. Such a construction is useful for providing modal stability to the VCSEL or for forming a mode-locked VCSEL. The optical fiber may be a graded index fiber. In such a case, the fiber length may be selected to have an integral number of quarter pitch lengths. The fiber may be doped with an excitable species and lies within a fiber laser cavity. A semiconductor laser may pump the fiber laser, yielding an emission wavelength beyond the scope of the conventional semiconductor laser.

A superconductive electrical cable is provided, which comprises a conductor consisting of superconductive wires. The conductor (L) is designed as a stranded conductor in which the wires (1) are stranded together with a predetermined pitch length (S) lying between about 5×D and about 20×D, where D is the diameter of the stranded conductor.