Abstract: Plastic containers are described herein that are injection molded with an high density polyethylene (HDPE) blow molding grade resin having a density of about 0.960 to about 0.965 g/cc and a melt index of about 0.7 to about 1.0 g/10 min. at injection temperatures of about 570° F. to about 670° F. and mold cavity pressures of about 20,000 psig to about 27,000 psig. Relatively thin walled, rigid, containers, such as livestock feed containers, may be manufactured as described using about 20% to 50% less material while retaining strength and durability comparable to containers molded of HDPE injection molding grade resins.

Abstract: An anodic bonding apparatus includes a first electrode and a second electrode. The first electrode has a first surface, and the second electrode has a second surface facing the first surface. The first surface includes a first central area; a first substrate placing area for placing a laminated substrate; and a first peripheral area surrounding the first substrate placing area. The second surface includes a second central area corresponding to the first central area; a second substrate placing area surrounding the second central area; and a second peripheral area corresponding to the first peripheral area and surrounding the second substrate placing area. Further, the second electrode includes a curved portion curved toward the first electrode, so that a distance between the first central area and the second central area becomes smaller than a distance between the first peripheral area and the second peripheral area.

Abstract: Providing a method for manufacturing a package capable of suppressing occurrence of a discharge phenomenon during the anodic bonding and achieving stable anodic bonding of the base board and the bonding film. Providing a method for manufacturing a package including: an alignment step where an inner surface of the lid board 50 is superimposed onto an inner surface of the base board 40, and an outer surface of the base board 40 is disposed on an electrode base portion 70 for anodic bonding; and an anodic bonding step where a bonding voltage is applied between the bonding film 35 and the electrode base portion 70 while heating them to a bonding temperature, whereby the bonding film 35 and the base board 40 are anodically bonded, wherein the anodic bonding step involves applying the bonding voltage in a state where the penetration electrodes 32, 33 are exposed to a void portion 73 formed in the electrode base portion 70.

Abstract: An induction heating inductor and perforated susceptor are formed as an integral unit to provide a low cost, physically stable, efficient, and easily cleaned unit.

Abstract: A method of forming a bag assembly by RF welding includes generating from a single source of RF energy a high frequency electric field having a first strength between tube-welding electrodes of opposing die members and a second strength less than said first strength between perimeter-welding electrodes of the opposing die members. Subjecting a tube assembly and corresponding portions of sheets surrounding the tube assembly to the high frequency electric field of said first strength for a predetermined amount of time to weld the sheets to a tube along a tube-weld. Corresponding portions of the sheets between the perimeter-welding electrodes are subjected to the high frequency electric field of said second strength for said predetermined amount of time to weld the sheets together along a bladder perimeter-weld. The subjecting steps are performed simultaneously so that the bag assembly is formed in one welding operation.

Abstract: A welding apparatus includes first and second die members opposing one another. The first and second die members include opposing respective first and second perimeter-welding electrodes and opposing respective first and second tube-welding electrodes. The first perimeter-welding electrode and first tube-welding electrode define a first welding surface. The second perimeter-welding electrode and second tube-welding electrode define a second welding surface. A single source of high frequency energy is electrically connected to the perimeter-welding electrodes and to the tube-welding electrodes. Dielectric material is selectively disposed on the first welding surface such that the material is disposed on some but not all the first welding surface for reducing a strength of a high frequency electric field between the first and second perimeter-welding electrodes as compared to a strength of the high frequency electric field between at least a portion of the first and second tube-welding electrodes.

Abstract: A method and a device (1) for bonding a metal fairing (6) to protect a leading edge of an aircraft airfoil (7), the metal fairing (6) is designed to be bonded against the airfoil (7) with the help of an adhesive (9). The bonding device (1) is remarkable in that it includes a rigid yoke (2) having inserted therein induction heater elements (30) for heating the metal fairing (6).

Abstract: A sealing device for inductive sealing of containers is provided. The sealing device includes at least one induction coil made from an at least partially flexible conductor. The induction coil has two coil halves arranged at a distance (d) apart between which the containers can be moved, in which the conductor in each case extends essentially parallel to a direction of motion (B) of the containers. The coil halves are connected to the induction coil via at least one flexible conductor loop, which extends perpendicular to the direction of motion (B) of the containers.

Abstract: A method of and apparatus for forming a bag assembly by RF welding. A single source of RF energy is used to generate a high frequency electric field having a first strength between tube-welding electrodes of opposing die members and a second strength less than the first strength between perimeter-welding electrodes of the opposing die members. Respective portions of the bag assembly are subjected to this variable-strength field simultaneously so that the bag assembly is formed in one welding operation. Stand-offs are used in some embodiments to limit penetration of the electrodes into the weld areas.

Abstract: An apparatus for welding a first plastic sheet to a second plastic sheet is provided. The apparatus includes an elongate die including a channel extending longitudinally along the die's welding face. In combination with a plate and a high frequency alternating current generator, the die and the plate are operable to compress the first and second plastic sheets in an overlapping arrangement and generate a high frequency alternating electromagnetic field between the die and the plate and weld the first and second plastic sheets to one another. The depth of the die channel prevents the formation of an electromagnetic field that is strong enough to weld the first and second plastic sheets in an area between the die channel and the plate. A die for use in such an apparatus and a method of use thereof are further provided.

Abstract: Asphalt cylinders or thermoplastic polymer modified asphalt cylinders or particulate forms are induction melted by magnetic field susceptor for a controlled distribution with felt paper to accomplish the construction of an industry standard BUR roofing system. These forms are similarly melted for highway crack sealing in an additional embodiment of the invention.

Abstract: A fuel tank made of a plastic material and fitted with at least one fuel accessory attached to an inside surface of a wall thereof, wherein the fuel accessory is attached to a predetermined site at the inside surface by fusion welding. Further there is disclosed a fuel accessory for attaching to a site at an inside wall portion of a plastic material fuel tank, comprising a housing formed with an engaging surface attachable to the site. The engaging surface is fitted with a fusion melting element for fusion welding the fuel accessory to the fuel tank.

Abstract: A portable induction tool is provided for soldering or brazing sections of metal pipe together. A work coil head (with induction coil) is U-shaped, allowing placement of the head around lengths of pipe, heating a susceptor (e.g., the pipe) to form a joint, and then to be withdrawn after the pipe joint is made. In one form, the tool uses heat pipes to remove thermal energy from the head, and also a heat exchanger for higher-powered units. Power capacitors are generally included with the induction (work) coil to create a tank circuit of a resonant frequency. The induction coil uses Litz wire, copper tubing, or heat pipes with a conductive outer skin to carry the high-current being delivered to the induction coil. The induction coil has a general racetrack configuration, which is typically wound in a U-shape (or as a semicircle) as a single winding, with multiple turns.

Abstract: The object of the present invention is to significantly inhibit the formation of voids between substrates bonded together when a liquid adhesive is supplied onto an optical disc substrate or when the optical disc substrate is bonded to another optical disc substrate. Accordingly, the present invention discloses a method for bonding two optical disc substrates together which comprises the steps of joining the optical disc substrates together with an adhesive and curing the adhesive, wherein the adhesive is supplied onto the optical disc substrate by an electric field formed between the adhesive-supplying nozzle, for supplying the adhesive onto the optical disc substrate, and the optical disc substrate, and the two optical disc substrates are then joined together and subjected to spun by a spinning process.

Abstract: A sealing device for inductive sealing of containers is provided. The sealing device includes at least one induction coil made from an at least partially flexible conductor. The induction coil has two coil halves arranged at a distance (d) apart between which the containers can be moved, in which the conductor in each case extends essentially parallel to a direction of motion (B) of the containers. The coil halves are connected to the induction coil via at least one flexible conductor loop, which extends perpendicular to the direction of motion (B) of the containers.

Abstract: Continuous installation (10) for the production of plastic laminates including multi-layer laminates (110, 120, 130), comprising a cold press (11) having a lower fixed plate (12) on which is laid a band of aluminium for carrying and drawing inside the press strips of copper (50, 90) and bands of pre-preg (70, 71, 80, 81) partially sliding on the surface of a structure (60) upstream of the press, to allow multi-layer laminates (130) to be placed on said bands (70, 71), said aluminium band (20) remaining in continuous contact with a pair of electrodes (30, 31), placed respectively at the entry to and at the exit from the press, and connected to the electric circuit of a generator (40) of electric current so that, on closure of the press and of said electric circuit, the fraction of metal band (20) comprised between the two electrodes (30, 31) functions as an electric resistance generating the heat needed for pressing.

Abstract: The invention is a rotatable cylindrical roll for heat sealing heat sealable materials that includes a heating zone for sealing the material and a cooling zone for supporting the newly formed seal. The device comprises a conductive zone and a resistive zone that are in electrical communication. The resistive zone comprises a cylindrical member having a circumferential band of resistive material disposed on its surface. The conductive zone comprises a cylindrical member having a plurality of conductive strips extending laterally across its surface that are in electrical communication with the resistive band. Current is applied via a brush to the conductive strips. Current flows from the conductive strips into the resistive band and exits through a conductive strip that is in contact with a ground. Current path through the resistive band defines the heating zone, and the cooling zone is defined by area of the resistant band outside the heating zone.

Abstract: An apparatus and process are provided for bonding of materials by induction heating of an electrically conductive material upon which a second material is bonded. The electrically conductive material is induction heated between a first induction heating plate, and the combination of a frame and a second induction heating plate that is disposed within the frame. The second induction heating plate is removed from the surface of the electrically conductive sheet, while the frame continues to hold the electrically conductive sheet flat, and the second material, in liquid form, is poured into the interior opening of the frame in which the second induction heating plate was originally placed. The liquid material solidifies and bonds to the electrically conductive sheet to produce a bonded product.

Abstract: A device for connecting components (1, 2, 3) made of fusible plastic, especially pipes (12, 60) of a fuel pipeline or a fuel line to a fuel tank (8) of a vehicle. The device includes a heating element (4) having ends (44, 46) which are used to supply electrical energy. The device is easy to use, simple to mount, and produces a functionally reliable welded joint between the components (1, 2, 3). To achieve this, one component (3) includes a retaining body (16) for a retaining tool (50), and the two ends (44, 46) of the heating element (4) extend onto the retaining body (16) where they can engage contact elements (56, 57) on the retaining tool (50).

Abstract: A portable induction tool is provided for soldering or brazing sections of metal pipe together. A work coil head (with induction coil) is U-shaped, allowing placement of the head around lengths of pipe, heating a susceptor (e.g., the pipe) to form a joint, and then to be withdrawn after the pipe joint is made. In one form, the tool uses heat pipes to remove thermal energy from the head, and also a heat exchanger for higher-powered units. Power capacitors are generally included with the induction (work) coil to create a tank circuit of a resonant frequency. The induction coil uses Litz wire, copper tubing, or heat pipes with a conductive outer skin to carry the high-current being delivered to the induction coil. The induction coil has a general racetrack configuration, which is typically wound in a U-shape (or as a semicircle) as a single winding, with multiple turns.

Abstract: A method and a device for manufacturing packages are provided. The method comprises providing a tubular first package part of a sheet of thermoplastic coated packaging material including at least one layer of an induction heatable material. The first package part has a sealed first joint between two mutually opposing edge sections of the sheet. The method further comprises joining together the first package part and a second package part by a second joint, the first and the second joint intersecting each other. The method further comprises arranging induction heating means including at least two conductors extending along each other, so that the conductors extend along the second joint and sealing the second joint by feeding an inducing current through the induction heating means. The inducing current is conducted by the conductors along the second joint in opposite directions in said at least two conductors.

Abstract: This invention relates to a method for preparing nonwoven fabrics having an improved balance of properties in the machine and cross-directions. More specifically, the invention utilizes nonwoven webs that include relatively low levels of multiple-component fibers having latent three-dimensional spiral crimp combined with fibers that do not develop spiral crimp. The latent spiral crimp of the multiple-component fibers is activated, such as by heating, under free shrinkage conditions, after formation of the nonwoven web to achieve re-orientation of the non-spirally-crimpable fibers and an improved balance of properties such as tensile strength and modulus.

Abstract: A method for fabricating devices in a pre-assembled state comprising forming plural laminae, registering the laminae, and bonding the laminae one to another is described. The plural laminae contain the substructures and structures of the device. The substructures are coupled to structures and other substructures by fixture bridges in the pre-assembled state. The substructures of the device are dissociated by eliminating the fixture bridges. The plural laminae are registered and bonded to form the device either before or after the fixture bridges are eliminated. The fixture bridges can be eliminated in a variety of ways, including vaporization by electrical current, chemical dissolution, or thermochemical dissociation. One method to selectively bond the laminae together is by microprojection welding. Microprojection welding comprises forming laminae with projections that extend from at least one planar surface of the lamina.

Abstract: A method for sealing a surface (13) of a body (11), wherein a thin material (21) is applied to the surface (13), and the material is connected to the surface by melting due to mechanical stimulation.

Abstract: The object of the present invention is to significantly inhibit the formation of voids between substrates bonded together when a liquid adhesive is supplied onto an optical disc substrate or when the optical disc substrate is bonded to another optical disc substrate. Accordingly, the present invention discloses a method for bonding two optical disc substrates together which comprises the steps of joining the optical disc substrates together with an adhesive and curing the adhesive, wherein the adhesive is supplied onto the optical disc substrate by an electric field formed between the adhesive-supplying nozzle, for supplying the adhesive onto the optical disc substrate, and the optical disc substrate, and the two optical disc substrates are then joined together and subjected to spun by a spinning process.

Abstract: Disclosed is an applicator for bonding a coating portion of a film to a substrate, the film including one or more heat activated layers, the applicator comprising a pair of opposing rollers configured to form a nip region therebetween for engaging the film and the substrate, and a source of extended radio frequency electromagnetic radiation directed at the film in a vicinity of the nip region of the pair of rollers engaging the firm and configured to heat the one or ore heat activated layers thereat to a predetermined temperature.

Abstract: An induction foil cap sealer includes a sealing head module and power supply module that can be separately mounted and replaced. Both modules are convection air-cooled without a requirement for forced air-cooling or water cooling.

Abstract: An inductive cap sealer for sealing an inner seal over an opening in a container includes a vented sealing head. The sealing head contains an induction coil for producing an electromagnetic field when energized by a power supply. Field focusing elements contain the coil and direct the electromagnetic field to a sealing region beneath the sealing head. The housing has openings and the field focusing elements are spaced to allow cooling air to flow around the field focusing elements and past the coil.

Abstract: An adhesive attachment assembly is provided for mounting an attachment member such as a threaded stud or the like onto a substrate, wherein the attachment assembly includes a heat source for rapidly curing a selected adhesive bonding agent. The adhesive attachment assembly includes a first attachment component defining a base surface for receiving the curable bonding agent thereon, and a second attachment component adapted for temporary connection to the substrate. Upon pressed mounting of the first attachment component with bonding agent thereon onto the substrate, the second attachment component is movable into temporary engagement with the substrate, and a spring member reacts between the first and second attachment components to apply a positive force urging the first attachment component toward the substrate for the duration of the bonding agent cure time. A heat source is carried by the first attachment component for activating and/or rapidly curing the bonding agent.

Abstract: A fixture for use with a radio-frequency welding press includes an independent electrode that is not attached to a platen of the press and which is used to register directly on flexible material workpieces to locate and hold workpieces during a welding operation. The invention also includes shuttles that slidably move welding fixtures to respective positions beneath and laterally away from press platens so that welding and workpiece removal and loading operations can be performed simultaneously on fixtures mounted to respective shuttles. Methods and alternate embodiments are disclosed.

Abstract: A method and apparatus for forming laminate composite structures. At least two laminae, each containing electrically conductive reinforcing fibers, are placed upon each other in contacting relationship to form a generally layered structure. The layered structure may be subjected to heat to conductively transfer heat through the layered structure and thereby improve the surface contact between the two laminae. The layered structure is volumetrically heated by inductively transferring energy to the electrically conductive reinforcing fibers. The heated, layered structure is consolidated, such as by applying pressure and reducing the temperature of the layered structure. The consolidated structure is then quenched by rapidly cooling the consolidated structure in a directionally controlled manner about a midplane thereof.

Abstract: In a method of producing a fuel tank from plastic, a heating element is located between two shell parts to be welded to one another. When the shell parts are pressed together, the heating element melts into the plastic and produces a weld that provides a fuel-resistant seal. The fuel tank subsequently has a particularly exact shape.

Abstract: A method of preheating a polymer plate by dielectric heating by applying a radio frequency voltage to a laminate in the direction of its lamination through electrodes; a method of producing a laminate, comprising dielectric heating a polymer plate by applying a radio frequency voltage to a laminate in the direction of its lamination through electrodes in a state where the laminate is housed in an annular container encompassing the surfaces of the laminates, and pressing the laminate in the direction of its lamination at least after completion of the application of the radio frequency voltage; and an apparatus for producing the laminate.

Abstract: An induction heating apparatus and method for heating a substantially continuous first bondline defined by a length of thermally responsive bonding material positioned between a first member and a second member. The first member or second member is made of an electrically conductive material or positioned adjacent an electrically conductive material. The inductive heating apparatus includes a flexible, reshapeable cable assembly operably positionable adjacent the first member along the first bondline. The flexible, reshapeable cable assembly is capable of being manually shaped to a first shape of the first bondline, and is capable of being manually re-shaped to a second shape of a second bondline different than the first shape of the first bondline. An alternating current power supply is electrically coupled to the flexible, reshapeable cable assembly.

Abstract: A wiring method is provided, in which a wire conductor is stuck on a surface of a substrate by causing a three-dimensional relative movement between a wiring head (2) for guiding the wire conductor (5) and the substrate (11) such that the wiring head relatively moves along an adhesive layer (12) on the surface of the substrate and the wiring head and the adhesive layer intermittently come close to each other for point contact. A wiring apparatus for carrying out the wiring method includes a table (1) for supporting the substrate, a wiring head arranged for reciprocating motion between a close position in which the wiring head can be in point contact with the adhesive layer and a distant position in which the wiring head is most distant from the adhesive layer, and a moving mechanism (3) for causing a translational motion of the wiring head along the surface of the substrate under the control of a control section (4).