The invention pertains generally to an improved fluid dispensing device, particularly a dispensing device which employs at least one hemispherical domed cannister source of reactants and which uses a color-changing dispensing plastic tip to inform the end-user if the reactants are at a proper use temperature.

A method of continuously manufacturing a cured membrane includes continuously compounding and mixing a vulcanizable rubber composition in a mixing extruder while continuously removing gasses from the vulcanizable rubber composition during mixing with a vacuum. The vulcanizable rubber composition may be continuously extruded to form an extrudate, which may be continuously calendered to form a green membrane. The green membrane may be continuously cured, such as by a hot air conveyor curing system, to form a cured membrane.

The invention relates to a method for producing a polycondensate melt from a primary material and a secondary material from materials of substantially the same type. A first partial melt stream (I) of the primary material and a second partial melt stream (II) of the secondary material are provided, and a measured value of the intrinsic viscosity of both partial melt streams (I, II) is determined, and a difference value is calculated from said measured values. Based on said difference value, the intrinsic viscosity of the second partial melt stream (II) is increased, reduced or maintained unchangedly by means of a first melt treatment device (8). Subsequently, the two partial melt streams (I, II) are combined into a common melt stream.

In the field of mixing rubber mixtures, the invention is directed to a rotor (100) for use in an internal mixer having a mixing vessel in which the rotor rotates, the rotor having one or more blades (104), each blade having a tip (104a) with a profile having a predefined curvature; and an anti-wear device detachably fixed to the tip (104a) of at least one blade, the anti-wear device including a plate (110) with a profile defined by a lower surface (112) with a curvature complementary to that of the tip 104a and an upper surface (114) with a curvature complementary to that of a wall of the vessel to define, between them, a zone of minimum distance that allows passage of the mixture between the plate (110) and the wall of the vessel. The invention is also directed to an internal mixer having at least one mixing vessel in which the disclosed rotor (100) rotates.

Dispensing system for dispensing a mixture of a first component and a second component, the dispensing system comprising: (i) a dispensing gun comprising an inlet body with a first passage for feeding in the first component under pressure and a second passage for feeding in the second component under pressure, the first and second passages respectively comprising a closable first outlet and a closable second outlet, which may be operable by means of a handle or trigger of the dispensing gun; (ii) a static mixing nozzle, detachably connectable to the outlets of the body and provided for mixing and dispensing the components, the static mixing nozzle comprising a first section containing a first chamber and a second chamber for conducting the first and second component respectively and a second section, subsequent to the first section (in forwards flow direction), containing a mixing chamber with static mixing elements which promote mixing the first and second components and conducting the mixture to a nozzle tip serving as an outlet for the mixture. According to the invention, at least one of the first and second chambers of the static mixing nozzle contains a series of static backflow prevention elements, arranged for hindering backflow of the respective component within the respective chamber.

The invention is a cartridge (1, 100) for stereolithography machines (200), which comprises a supporting structure (3) provided with connection means (10) suited to removably connect it to the stereolithography machine (200), a first reservoir (5) suited to contain a material (M1, M2) and provided with a first duct (8) and with a delivery mouth (81) which are suited to place it in communication with a container (4), a feeding unit (7) suited to feed the material (M1, M2) from the first reservoir (5) to the container (4), shutter means (9) suited to close the delivery mouth (81) of the first duct (8), and a second reservoir (12) suited to contain the material (M1, M2). The cartridge (1, 100) furthermore comprises a second duct (13) interposed between the first reservoir (5) and the second reservoir (12) in such a way as to place them in communication with each other. The feeding unit (7) is configured so that it conveys the material (M1, M2) from the first reservoir (5) to the second reservoir (12) and vice versa through the second duct (13) when the shutter means (9) are in the position in which they close the delivery mouth (81).

This application is directed to polymer blends of polyethylene naphthalate, polytrimethylene terephthalate, and polyethylene naphthalate, for use in fibers, such as carpet fibers, and other applications. This application is also directed to methods of producing such polymer blends and fibers.

The invention relates to a sulfur-crosslinkable rubber mixture, to a vulcanizate thereof and to a vehicle tire. The sulfur-crosslinkable rubber mixture contains at least the following constituents: at least one diene rubber; and 10 to 300 phr of at least one silica; and 1 to 22 phf of at least one silane A having general empirical formula A-I)
(R.sup.1).sub.oSiR.sup.2(SR.sup.3).sub.qS.sub.x(R.sup.3S).sub.qR.sup.2Si(R.sup.1).sub.o; andA-I) 0.5 to 30 phf of at least one silane B having general empirical formula B-I)
(R.sup.1).sub.oSiR.sup.2(SR.sup.3).sub.uSR.sup.2Si(R.sup.1).sub.oB-I) wherein x is an integer from 2 to 10, q is 0, 1, 2 or 3 and u is 1, 2 or 3.

A system (1) for distributing resin (3), the system (1) including at least one supply of resin (3a,3b), at least one conduit (5a,5b) operatively connectable to a corresponding supply of resin (3a,3b), and at least one pump (7a,7b) operatively connectable to each conduit (5a,5b) for pumping resin (3) from the corresponding supply of resin (3a,3b). The system (1) also includes a driving assembly (9) operatively connectable to each pump (7a,7b) for driving the same, the driving assembly (9) including a transmission assembly (11) being configured specifically depending on the nature of resin (3) to be pumped through each conduit (5a,5b). The system (1) also includes a discharging assembly (13) operatively connectable to each conduit (5a,5b) for discharging resin (3) out from the discharging assembly (13), the discharging assembly (13) being also operatively connectable to the driving assembly (9) for selectively and adjustably controlling operating parameters of each pump (7a,7b). Also described is a resin reservoir bag to be used for with the resin distributing system (1).

Multi-component fluid mixing devices and methods of manufacturing and using such multi-component fluid mixing devices are provided. The multi-component fluid mixing devices include one or both of a serpentine flow path and an attachment point decoupled from an inlet of the multi-component fluid mixing devices. The method of use includes switching between multi-component fluid mixing devices with different length flow paths, while retaining a constant position of the outlet of the multi-component fluid mixing devices. A manufacturing method includes fusing two halves of a multi-component fluid mixing device together with mixing elements in a serpentine flow path captured in a mixer wall formed between the two halves of the multi-component fluid mixing device.