Abstract: Adhesive compositions that replace gaskets and liners in sealing applications for packages that are detachable with hand force are described. The adhesive compositions are particularly useful in preventing leaks and spillage during storage and transport of its packaged contents. Advantageously, the adhesive composition provides packages with (1) a removal torque of from about 4 to about 20 in-lb and (2) resealable torque on subsequent openings of from about 2 to about 15 in-lb, measured in accordance to ASTM D2063.

Abstract: A method and system for thermal forming an object. A mold is provided, a shape of which corresponds to a desired shape of the object. A material is inserted into a heating area, and the material is heated using a plurality of independently controllable heat sources that heat different areas of the material. The heated material is then disposed over or into at least a portion of the mold so as to deform the material. The deformed material may then be trimmed so as to form the object.

Abstract: The present disclosure relates to liners and methods of making liners. The liners may be suitable for use with tanks and other storage/containment vessels, such as process tanks, immersion tanks, indoor or outdoor containment pits, gravity feed conduits (e.g., concrete trench, canal, or drain, etc.) for transferring or conveying liquid, grain storage tanks or containers (e.g., dielectric or electrically non-conductive liners for grain storage, etc.), etc.

Abstract: Welding apparatus (10; 30) having a safety feature comprising: two electrodes (11, 12; 21, 22), whereof at least one of said two electrodes is movably arranged in relation to the other electrode. The electrodes are in non-contact with each other and define a gap (13) in which an object (14) provided with an electrically non-conductive surface to be sealed may be inserted. The welding apparatus comprises an actuator (15; 25) configured to move at least one electrode when activated to squeeze the object, a detector (16; 26) configured to determine a clamping force when the inserted object (14) is squeezed between the electrodes, a distance sensor (17; 23) configured to measure the distance between the electrodes. There is also a conductance sensor (24) configured to measure the conductivity of an object located between the electrodes (11, 12; 21,22) when the object (14) is squeezed, and optionally a position sensor (19b) configured to detect the position of the object (14) inserted between the electrodes.

Abstract: A method is described for opening a heat bonded sterile connection that includes a skin of material blocking flow between the connection site. The method includes applying external pressure to the connection site.

Abstract: Embodiments of a welding system including a controller adapted to implement a lockout mechanism are provided. The controller may be adapted to selectively activate a learn mode and a use mode of a component of the welding system. When the learn mode is activated, the controller receives an allowable data set and stores the allowable data set to memory. When the use mode is activated, the controller receives an operational data set, references the allowable data set to check if the operational data set is allowable, logs the operational data set and enables the component of the welding system to operate when the operational data set is allowable, and disables the component of the welding system when the operational data set is not allowable.

Abstract: An apparatus for forming a bag assembly includes opposing die members. Each opposing die member defines a single die and has a perimeter-welding portion for forming a perimeter-weld of the bag assembly and a tube-welding portion for forming a tube-weld of the bag assembly. During operation, the perimeter-welding and tube-welding portions weld the bag assembly simultaneously, then the perimeter-welding portion of one of the opposing die members is moved relative to the tube welding portion of the die member to increase the distance between the perimeter-welding portions of the opposing die members. When the perimeter-welding portions are moved apart, welding by the perimeter-welding portions is generally suspended while welding by the tube-welding portions may continue.

Abstract: A cooking appliance includes a housing forming a food handling compartment, a door positioned at the front of the housing that is configured to rotate about a vertical axis, and a hinge assembly secured to the door. The hinge assembly includes a hinge pin extending along the vertical axis and a double slider-crank mechanism that is coupled to the hinge pin. As the door rotates about the vertical axis, the hinge assembly moves the vertical axis along an elliptical path.

Abstract: An apparatus for forming a bag assembly includes opposing die members. Each die member has a perimeter-welding portion for forming a perimeter-weld of the bag assembly and a tube-welding portion for forming a tube-weld of the bag. During operation, first the perimeter-welding and tube-welding portions weld the bag assembly simultaneously, then the perimeter-welding portions are moved to increase the distance between them. When the perimeter-welding portions are moved apart, welding by the perimeter-welding portions is generally suspended while welding by the tube-welding portions may continue.

Abstract: A method is provided for securing a fluid meter to a fluid collection bag. The method includes the steps of providing a meter ha6 ving a housing defining a fluid receptacle and at least one drain opening, providing a collection bag defining a fluid reservoir and having at least one inlet opening and securing the meter to the bag using an RF welding device to allow fluid communication between the fluid receptacle and the fluid reservoir. In one embodiment, the housing includes a raised surface positioned about the at least one drain opening to which the collection bag is welded.

Abstract: A body of an automated hand held tubing sealer encloses an electric motor, a drive train responsive to the electric motor, a source of RF energy, a switch for initiating operation of the electric motor and limit switches for controlling operation of the source of RF energy as a function of the drive train and a programmable microprocessor for controlling and varying any of numerous parameters. A sealing head assembly is formed by a fixed jaw and a movable jaw to compress tubing placed therebetween in response to operation of the drive train and to melt the compressed tubing as a function of operation of the source of RF energy. A fitting permits selectively detachably attaching the sealing head assembly with the body at any of more than one angularly displaced positions.

Abstract: Tubing sealers, whether hand held or desk mounted, heat seal liquid filled plastic tubing on command to develop sealed liquid filled easily separable segments serially attached to one another. The sealer generates a source of RF energy to heat seal the plastic tubing on placement of the tubing between a fixed jaw and a tubing compressing moveable ground jaw. The moveable ground jaw serves as a heat sink to dissipate heat and prevents a heat buildup during rapid repetitive operation of the sealer. The configuration of the moveable ground jaw coming in contact with the tubing primarily, but in combination with the degree of compression of the tubing and the RF power applied, controls both the integrity of the seal and the ease with which the sealed segments of tubing can be separated from one another.

Abstract: A tube apparatus is provided to detect successful or failed tube operations. The tube apparatus includes jaws mounted for movement with respect to one another between (1) a first position spaced from one another and (2) a second position selected to perform a successful tube operation. A sensor is positioned to detect when the jaws have moved into the second position, and a timer is electrically coupled to the sensor for determining the time delay before the jaws have moved into the second position, wherein a time delay up to a predetermined time limit indicates a successful tube operation and a time delay exceeding the predetermined limit indicates a failed tube operation.

Abstract: FIG. 1 depicts a full view of the picnic table backrest. It shows the backrest, the bars that wrap around the bench to keep the back rest stable and the latch on the back of the rest that keeps the rest from slipping out. FIG. 2 shows a close up view of the latch on the rear of the backrest. The bar that holds the latch swivels upward to latch on to the top part of the backrest. This keeps the backrest from slipping out and also holds it in place so it doesn't shift while your sitting.

Abstract: A dielectric tube sealer is provided with first and second jaws oriented along a jaw axis and positioned to receive a tube portion in a space therebetween. The first jaw is fixed and is coupled to a radio frequency generator. The second jaw is movable with respect to the first jaw along the jaw and is coupled to ground potential. The second jaw is mounted on a single shaft. At least a portion of the shaft extends along a shaft axis that is substantially parallel to, but spaced from, the jaw axis.

Abstract: A desk top sealer includes three compartments for housing a solenoid assembly, a power supply and a circuit board, respectively. A source of air flow flows into an initial compartment and is channeled through apertures in brackets forming the two remaining compartments for cooling purposes and is exhausted from each compartment through a base. The circuit board, upon actuation, provides RF energy to a fixed ceramic/metal jaw to heat and weld plastic tubing clamped to the fixed jaw by a movable jaw at ground potential. The movable jaw is guided during translation by a pair of rods extending from a face plate, which rods also prevent rotation of the movable jaw about its axis of translation to maintain the movable jaw in alignment with the fixed jaw. The movable jaw is relatively massive to serve as a heat sink for the heat of the tubing being welded and includes a substantial surface area to dissipate to the ambient environment any heat buildup that may occur.

Abstract: A pair of plastic containers are compressed intermediate a pair of jaws and RF energy is applied as a function of the change in impedance of the melting plastic between the jaws to sterilize with heat the plastic intermediate the pair of jaws and to form a sterile rupturable membrane encircled by a seal to permit fluid communication on demand between the containers upon rupture of the membrane. The use of RF energy to heat bipolar plastic material (dielectric material) both sterilizes the plastic material and welds the plastic material at a proper temperature to form the rupturable membrane without the use of any instrumentation indicative of temperature or other control parameters.

Abstract: An apparatus for forming coiled tubular assemblies is provided. The apparatus includes a pair of dies formed from a radio frequency (RF) conducting material. The dies each have contoured leading surfaces with these surfaces having grooves with lands between adjacent grooves. The lands of the dies cooperate to form web forming chambers when the pair of dies are moved together in their operative position. In the operative position, the tubes are captured in the aligned grooves with portions of the tubes being squeezed or extruded into the web forming chamber. Application of RF energy to the dies causes the tube portions in the chambers to plasticize and form webs between the coils of the tubes with a predetermined configuration substantially the same as that of the web forming chambers. Both radially coiled and axially coiled tube assemblies are contemplated by the invention. In addition, an easy-to-separate or peel tubular assembly is formed with the above apparatus.

Abstract: A method of heating an adhesive including the steps of placing a dielectrically heatable adhesive between first and second members. A high frequency electric field is applied between the first and second members sufficient to dielectrically heat the adhesive. The surface temperature of the first member is measured in the vicinity near the adhesive. The electric field is removed after the measured temperature reaches a predefined amount. The invention anticipates measuring the infrared radiation emitted from the surface of the first member and is measured with an infrared detector. A controller receives the measured infrared radiation and compares it to stored values. After the measured temperature reaches a predefined value or values, the controller sends a signal to an RF generator to remove the electric fields.

Abstract: Radio frequency power for melting, sealing and welding plastic tubing compressed between a pair of manually or automatically actuated electrically conducting jaws of a hand held or fixed base tubing sealer is regulated by a pulse width modulator controlling the duty cycle of applied constant voltage pulses. A predetermined change of impedance of the tubing during compression and melting is detected to regulate the power applied and to ensure a weld of predetermined physical parameters. On completion of the weld, a first timer is reset and a further weld may be made. In the event of impedance mismatch, a second timer inhibits further application of power and resetting of the first timer. The use of the pulse width modulator enhances conservation of power and accommodates portability of the tubing sealer through use of rechargeable batteries as the power source.

Abstract: Method and apparatus employing radio frequency electric energy for heat sealing of laminated packaging materials, particularly aseptic packaging materials, that include facing contiguous layers of thermoplastic material, including first and second seal jaws having respective working surfaces. The working surface of the first seal jaw is defined by a plurality of working faces of alternating layers of electrically conductive and electrically nonconductive materials.

Abstract: A tubing set includes at least one fluid conveying tube. The fluid conveying tube has a predetermined outside diameter, and is formed of a material adapted to be dielectrically heated at a sealing location. The insulating sleeve has an inside dimension at least as large as the outside diameter of the fluid conveying tube. The tubular insulating sleeve is positioned in a substantially coaxial relationship with the fluid conveying tube at the sealing location, and has a wall with thickness which insulates the fluid conveying tube to permit sealing the fluid conveying tube, and forming a thin, easily tearable web, by the application of the radio frequency dielectric heating.

Abstract: An insulating sleeve retains heat in the plastic of a flexible plastic medical tube when the plastic of the medical tube is dielectrically heated by a radio frequency tubing sealer. The heat retained by the insulating sleeve permits additional melting of the plastic of the medical tube after a seal has been formed. The additional melting results in forming an easily tearable web between the segments of the medical tube in the same operation as the sealing operation. The medical tube is selectively sealed without forming the easily tearable web by using the radio frequency tubing sealer without the insulating sleeve.