A system includes a dip tube, a feed line, and a check valve. The dip tube is inserted through an opening in a source of chemical precursor and into the chemical precursor in the source. A portion of the feed line is located in the dip tube. The feed line passes out of the dip tube. The chemical precursor is capable of flowing out of the source through the feed line in a downstream direction. The check valve is located in the portion of the feed line in the dip tube. The check valve permits the chemical precursor to pass substantially only in the downstream direction. The feed line is coupled to a transfer pump that draws the chemical precursor out of the source through the portion of the feed line in the dip tube.

A longitudinal sealer includes a housing, an arm, and a heating element. The housing is configured to be installed in a foam-in-bag system. The arm is movably coupled to the housing. The heating element has a leading edge exposed through an exterior surface of the arm. A position of the arm with respect to the housing is controllable so that the arm is movable between a first location where the leading edge of the heating element is not in contact with a film in a film path of the foam-in-bag system and a second location where the leading edge of the heating element is in contact with the film in the film path of the foam-in-bag system.

A joining tool (7), a joining device (2) equipped therewith and a joining method for joining stringers (9) to flexible workpieces (8) are provided. A plurality of industrial robots (3 to 6) are equipped with the joining tools (7) and handle and join the stringer (9) jointly. The joining tools (7) are heated and grip the stringer (9) via a gripper tool (25) on the upper face (30) of the structural unit, using a controlled suction gripper (26), a heated counter-holder (29), which is arranged next to the gripper tool, likewise acting upon the upper face (30) of the structural unit.

A system holds a roll of film that includes a core and film wound around the core. The system includes a rod having an outer diameter that is smaller than an inner diameter of the core, a proximal wing located on the rod and configured to rotate about the rod, and a distal wing located on the rod and configured to rotate about the rod. Each of the proximal and distal wings includes contact surfaces configured to contact diametrically-opposed locations on a side of an inner surface of the core and non-contact surfaces that span between the contact surfaces of the wing. The non-contact surfaces of the wings do not contact the core if the core has a cylindrical shape. The distal wing is capable of rotating around the rod independently of the proximal wing.

A system for opening and closing a mixing manifold includes a drive motor, a cam plate, and a valving rod connector. The drive motor imparts movement in first and second directions. Movement imparted in the first direction causes the cam plate to move linearly in a third direction and movement imparted in the second direction causes the cam plate to move linearly in a fourth direction. Movement of the cam plate in the third direction causes the valving rod connector to move linearly in a fifth direction and movement of the cam plate in the fourth direction causes the valving rod connector to move linearly in a sixth direction. Movement of the valving rod connector in the fifth direction causes retraction of a valving rod of the mixing manifold and movement of the valving rod connector in the sixth direction causes extension of the valving rod.

Methods for assembling rotor blades are provided. A method includes receiving a first portion of a rotor blade at an erection site. The method further includes receiving a second portion of the rotor blade at the erection site. The method further includes aligning the first portion and the second portion at the erection site, the first portion and the second portion supported on a fixture system when aligned. The method further includes connecting a blade component of the first portion and a blade component of the second portion together at the erection site.

A device for welding plastic materials includes a handheld, wand-type applicator that dispenses a focused stream of oxygen-free air for optimum fusion. The applicator comprises a heating coil that warms the dispensed air to a sufficient temperature to sufficiently meld the plastic materials. A weld air delivery system delivers the supply of oxygen-free air to the weld applicator. A separate coolant air delivery system includes a tank that collects a reserve supply of ambient air that is used to cool the heating coil when applicator is not actively welding plastic materials. The inclusion of separate delivery systems ensures that ambient air is used to cool applicator, whereas oxygen-free air is preserved for use in welding applications. For safety purposes, a switch deactivates the heating coil when the pressure of the reserve air in the tank falls beneath a predefined threshold that is considered necessary to adequately cool the applicator.

Methods for assembling rotor blades are provided. A method includes receiving a first portion of a rotor blade at an erection site. The method further includes receiving a second portion of the rotor blade at the erection site. The method further includes aligning the first portion and the second portion at the erection site, the first portion and the second portion supported on a fixture system when aligned. The method further includes connecting a blade component of the first portion and a blade component of the second portion together at the erection site.

A joining tool (7), a joining device (2) equipped therewith and a joining method for joining stringers (9) to flexible workpieces (8) are provided. A plurality of industrial robots (3 to 6) are equipped with the joining tools (7) and handle and join the stringer (9) jointly. The joining tools (7) are heated and grip the stringer (9) via a gripper tool (25) on the upper face (30) of the structural unit, using a controlled suction gripper (26), a heated counter-holder (29), which is arranged next to the gripper tool, likewise acting upon the upper face (30) of the structural unit.

Disclosed are a device and a method for bonding an auxiliary secondary barrier for an LNG storage tank. The device for bonding an auxiliary secondary barrier includes: a frame; a driving unit, a portion of which is arranged in the frame, and which enables the frame to move on an upper heat insulation board corresponding to an exposed portion of a main secondary barrier; an adhesive applying unit arranged in the frame to apply an adhesive on the exposed portion; an auxiliary secondary barrier supply unit arranged in the frame to supply an auxiliary secondary barrier on the adhesive applied on the exposed portion; and one or more heating unit arranged in the frame to heat at least one of the exposed portion to which the adhesive contained in the adhesive applying unit is to be applied and the auxiliary secondary barrier to be supplied on the applied adhesive.