Abstract: An array of panels foldably connected such that the array may be collapsed into a single stack of panels, and a method of manufacturing such an array. The array has at least three rows of panels, where the first and second rows have at least two panels and the third row has at least one panel. The panels in each row are foldably connected so that each row of panels may be collapsed into a single stack of panels. Each row of panels is connected to the row of panels below it so that the individual stacked rows may be further collapsed onto each other to form a single stack of panels. With this folding scheme, the array may have more than two panels in each row and may have more than three rows of panels. The panels define connecting pin channels that, when the panels are unfolded, are co-axially aligned with connecting pin channels of adjacent panels. Connecting pins are inserted into the co-axially aligned connecting pin channels to hold panels in a specific orientation with respect to each other.

Abstract: A system for fusion bonding several attachments to a relatively large and bulky thermoplastic article employs means for fixedly securing the article, and a movable fixture selectively positionable relative to the thermoplastic article. The fixture includes a base plate held stationary during bonding operations, a gripping device supporting the thermoplastic article and longitudinally reciprocable relative to the base plate, and a pair of arms supporting a platen or other heating tool, also longitudinally reciprocable relative to the base plate. The tool supporting arms further can be pivoted to move the heating tool between an aligned position between the thermoplastic attachment and fixed thermoplastic article, and a remote, withdrawn position, to allow longitudinal movement of the attachment into engagement with the thermoplastic article, following use of the heating tool to simultaneously fuse selected surface portions of the thermoplastic article and attachment.

Abstract: A contact heating platen assembly includes an upright central standard, a plurality of inclined linking members pivotally mounted to the standard, and to a pair of opposed platen carriers on opposite sides of the standard, each traversing an arcuate path relative to the standard. Each of the carriers supports a heating platen and an electrical heating element for heating the platen. The carriers are spring biased into a collapsed position against the standard, but movable to an extended position relatively remote from the standard. To complete a fusion bond, a pair of workpieces are positioned on opposite sides of the platen assembly, each with a fusible surface portion positioned to be engaged by one of the platens when the assembly is extended. The assembly is extended whereby the heated platens engage the fusible surface portions. The platens are maintained against the surface portions until they are fused, then allowed to retract or collapse under the spring force.