A novel ledge forming system used to attach a polymer retention hub to a thin wall nozzle core to provide an efficient way to produce a conjunct nozzle. The inventive apparatus provides a means for assembly of components by a method involving use of a press with a heating element to elevate temperature of a thermoplastic polymer to permit formation of a ledge that overhangs the flange of a nozzle core, mechanically locking components together. Execution of the process is rapid, low cost and eliminates damage to the thin wall of the core that would occur if the polymer retention hub were molded around the nozzle core.

An impeller of a centrifugal fan includes multiple blades arranged annularly around a rotational axis, a main plate, a shroud, main plate-side welded portions between main plate-side blade axial ends of the blades and the main plate, and shroud-side welded portions between shroud-side blade axial ends of the blades and the shroud. The main plate is arranged opposite to main plate-side blade axial ends. The shroud is arranged opposite to shroud-side blade axial ends. The main plate-side welded portions have main plate-side welding holes that are recesses extending through the main plate to portions of the main plate-side blade axial ends. The shroud-side welded portions have shroud-side welding holes that are recesses extending through the shroud to portions of the shroud-side blade axial ends.

A pocketed spring assembly comprises a plurality of parallel strings of individually pocketed springs. Each string is joined to at least one adjacent string. Each string has first and second opposed plies of fabric and a plurality of pockets formed along a length of the string by transverse segmented seams joining the plies. Gaps between the segments of the seams allow air to pass into and out of the pockets despite the fabric being impermeable to airflow through the fabric. The fabric has at least four layers. The size of the gaps determines the firmness or feel of the pocketed spring assembly or portion thereof.

A distal end portion on a side of an object to be joined of a resonator for joining is so configured that a plurality of protrusions each having an outer face not including an angular shape edge are stacked in two or more steps in a direction in which the resonator for joining and a reception jig for joining oppose to each other and that a shape of a protrusion on the side of the object to be joined is made smaller than a shape of a protrusion on a side of the resonator for joining. With this configuration, it is possible in the process of joining the object to be joined to first concentrate energy of acoustic vibration or ultrasonic vibration on a protrusion having a smaller shape serving as a first step protrusion to trigger to start displacement, then smoothly join, by a protrusion having a larger shape serving as a second step protrusion, a part of the object to be joined existing around the protrusion having the smaller shape, whereby metal foils can be joined without using a protection member for protection of the metal foils. A distal end portion having a plurality of protrusions stacked in two or more steps may be provided in the reception jig.

The present disclosure relates to methods and apparatuses for mechanically bonding substrates together. The apparatuses may include a pattern roll having three or more pattern elements protruding radially outward, wherein each pattern element includes a pattern surface. The pattern surfaces are also separated from each other by gaps having minimum widths. The pattern roll may be adjacent an anvil roll to define a nip between the pattern surfaces and the anvil roll, wherein the pattern roll is biased toward the anvil roll to define a nip pressure between pattern surfaces and the anvil roll. As substrates advance between the pattern roll and anvil roll, the substrates are compressed between the anvil roll and the pattern surfaces to form a discrete bond region between the substrates. During the bonding process, some of yielded substrate material also flows from under the pattern surfaces and into the gaps to form gap grommet regions.

A pocketed spring assembly comprises a plurality of parallel strings of individually pocketed springs. Each string is joined to at least one adjacent string. Each string has first and second opposed plies of fabric and a plurality of pockets formed along a length of the string by transverse segmented seams joining the plies. Gaps between the segments of the seams allow air to pass into and out of the pockets despite the fabric being impermeable to airflow through the fabric. The fabric has at least four layers. The size of the gaps determines the firmness or feel of the pocketed spring assembly or portion thereof.

A sealing device generally includes a rotatable support cylinder having an outer, circumferential surface and a heating element disposed about such surface and secured thereto such that the heating element rotates therewith. The heating element is coiled about the outer surface of the cylinder in the form of an overlapping helical pattern. Juxtaposed film plies may be sealed together by bringing the sealing device into rotational contact with the juxtaposed film plies and heating the heating element to a temperature sufficient to cause the film plies to seal together.

A process for producing a flexible container is provided. The process includes: A. providing a rear panel web, a front panel web, a first folded gusset panel web, and a second folded gusset panel web, each panel web having peripheral edges and a bottom face, each bottom face having two opposing tapered edges meeting at a bottom end; B. placing the folded gusset panel webs between the rear panel web and the front panel web, the gusset panel webs opposing each other, the panel webs configured to form a common periphery and the bottom seal area including the bottom end of each panel; C. first sealing the peripheral edges, the tapered edges, and the bottom seal area under a set of heat seal conditions; D. second sealing a portion of the bottom seal area under a second heat seal condition; and E. forming a flexible container.

A method (400) for assessing quality of a transversal sealing (102) of a paperboard-based food package (100), wherein the food package (100) comprises a longitudinal scaling (104), and is provided with an reference imprint (106) in connection to the transversal sealing (102) is provided. The method (400) comprising, capturing (S402), by a camera (202), image data of the transversal scaling (102), determining (S404), in the image data, a position of the reference imprint (106), determining (S406), in the image data, a position of a reference line (104), determining (S408) quality measurement data of the transversal sealing (102) based on the position of the reference imprint (106) relative to the position of the reference line (104).

A pocketed spring assembly comprises a plurality of parallel strings of individually pocketed springs. Each string is joined to at least one adjacent string. Each string has first and second opposed plies of fabric and a plurality of pockets formed along a length of the string by transverse segmented seams joining the plies. Gaps between the segments of the seams allow air to pass into and out of the pockets despite the fabric being impermeable to airflow through the fabric. The size of the gaps determines the firmness or feel of the pocketed spring assembly or portion thereof.