Abstract:
A spray tip comprises a tip body, a tip piece, and a pre-orifice piece. The tip body has a fluid channel along a channel axis (AC). The tip piece is disposed within the fluid channel, and has a stepped, narrowing passage that terminates in an outlet orifice. The pre-orifice piece has an inlet passage, and is disposed within the fluid channel, abutting and immediately upstream of the tip piece. The pre-orifice piece and the tip piece together define a turbulating chamber therebetween.
Abstract:
Method of manufacturing track membranes by penetration of working substances into and through the membrane matrix of polymer material is disclosed. The matrix is placed into holder that is inserted into one end of a tubular shell, the other end of which contains a cartridge with an explosive material and a working substance in the form of a supersaturated solution of a water-soluble salt. When the explosive material is detonated, the particles of the water-soluble salt interact with the matrix in the form of a high-speed jet with the velocity of particles in the range of 3800 to 4200 m/sec. As a result of penetrating of the particles into and through the material of the matrix, a plurality of holes is formed in the matrix. The track membranes are produced by slicing the membrane matrix after removal of the residue of the particles by washing the pierced membrane with water.
Abstract:
A molding unit for producing an opening device, wherein a web having plural holes is fed to the unit, and the opening device has a spout closed by a membrane, a neck portion projecting from the spout, and a pull ring extending from the membrane inside the neck portion. The unit includes first and second mold devices cooperating with the web to define a closed cavity, and movable to be detached from the web. The unit also has a first and a second matrix which can be set to a configuration in which they are located inside the cavity to define a first and second volume. The matrices are movable relative to the web to disengage the opening device from the volumes and permit removal of the opening device by feeding forward the web. A single actuator moves one of the mold device and the matrices to/from the web.
Abstract:
A method for making apertures in a precursor web using a forming apparatus is provided where the web comprises a film having molecular orientation and the forming apparatus comprises an arrangement of teeth. The orientation of the arrangement of teeth and the molecular orientation of the film are predetermined and modified to provide a relative angle between the orientation of the teeth and the molecular orientation of the film. Apertures formed in the precursor web material have a length and width exhibiting a minimal aspect ratio.
Abstract:
To produce a molded part with a through-hole, a rod-shaped blank is pushed through a guide into a cavity and fixed in place. The end region of the blank is compressed and reshaped into a disk. A disk core having the same cross-sectional shape as the blank is ejected out of the disk using a punch and pushed into the guide and moved back together with the unshaped part of the blank. The disk is severed from the disk core and the molded part is removed from the cavity. During the penetration step, the disk present in the cavity is subjected to an axial pressure in the disk core ejection direction and the blank is subjected to an axial counter-force opposite to the disk core ejection direction.
Abstract:
A plastic closure includes a shell having a base wall with a skirt for securement to a container finish and a lip that extends radially inwardly from the skirt at a position adjacent to and spaced from the base wall. A liner is compression molded in situ against the base wall, and between the base wall and the lip. The lip has a plurality of circumferentially spaced passages that extend through the lip for venting air during compression molding of the liner.
Abstract:
A process for the production of a container of thermoplastic material by extrusion blow molding is provided, in which during shaping of the container within a multi-part tool, the container is provided with at least one connection element (3) which passes through the wall of the container. The connection element (3) according to the invention, is of a two-part structure, wherein a part is in the form of a removal cutting element (11). The cutting element (11) serves as a penetration tip for piercing the wall of the container while still in the plastic condition.
Abstract:
A polymeric web exhibiting a soft and silky tactile impression on at least one side thereof is disclosed. The silky feeling side of the web exhibits a pattern of discrete hair-like fibrils, each of the hair-like fibrils being a protruded extension of the web surface and having a side wall defining an open proximal portion and a closed distal portion. The hair-like fibrils exhibit a maximum lateral cross-sectional diameter of between 2 and 5 mils, and an aspect ratio from 1 to 3. Methods and apparatus for making the polymeric web utilize a three-dimensional forming structure having a plurality of protrusions being generally columnar forms having an average aspect ratio of at least about 1.
Abstract:
A method of fabricating an elastomeric structure, comprising: forming a first elastomeric layer on top of a first micromachined mold, the first micromachined mold having a first raised protrusion which forms a first recess extending along a bottom surface of the first elastomeric layer; forming a second elastomeric layer on top of a second micromachined mold, the second micromachined mold having a second raised protrusion which forms a second recess extending along a bottom surface of the second elastomeric layer; bonding the bottom surface of the second elastomeric layer onto a top surface of the first elastomeric layer such that a control channel forms in the second recess between the first and second elastomeric layers; and positioning the first elastomeric layer on top of a planar substrate such that a flow channel forms in the first recess between the first elastomeric layer and the planar substrate.