Abstract: A polyester film contains a polyester having an intrinsic viscosity (IV) in the range from 0.65 to 0.8 and an antioxidant. The polyester has an endothermic high temperature peak at a temperature of (A).degree.C. and an endothermic low temperature peak at a temperature of (B).degree.C., both peaks being measured by differential scanning calorimetry (DSC), and the value of (A-B) is in the range from 25.degree. C. to 50.degree. C. The polyester film is suitable for use an insulation film, exhibiting improved ageing properties.

Abstract: A portable airfreight container base panel or other load-bearing panel of hollow core reinforced construction comprising top and bottom sheets interconnected and maintained in parallel relationship by spaced parallel ribs, with the top sheet additionally supported by nonfastened intercostal tubular columns bridging between sheets and maintained in preselected design positions, suited to the specific load requirements of individual applications, by one or more styrofoam retainer sheets or equivalent means apertured to receive and hold the columns in position.

Abstract: This invention relates to apparatus for binding collated or sorted sheets. More particularly, this invention relates to such apparatus for simultaneously binding multiple sets of collated or sorted sheets that have been assembled in a multiple-compartment sheet receiver.

Abstract: This invention relates to apparatus for binding collated or sorted sheets. More particularly, this invention relates to such apparatus for simultaneously binding multiple sets of collated or sorted sheets that have been assembled in a multiple-compartment sheet receiver.

Abstract: The apparatus includes a reciprocative side edge jogger for aligning the side edges of multiple sheet stacks in a column through movement with respect to the sheet side edges along a rectilinear path perpendicular thereto. The apparatus additionally includes a movable end edge jogger. The sheets are aligned against side and end edge backstops, which respectively oppose the side and end edge joggers. In one preferred embodiment, the side and end edge joggers are driven by a single motor. In a second preferred embodiment, the side and end edge joggers are driven by separate motors.

Abstract: The sheet binding apparatus is comprised of a movable binder assembly including an endless belt and an elongated heat application platen underlying one belt run. The belt is coated with a hot-melt adhesive, which, when heated by the platen, is applied by the belt to the co-planar sheet edges of one or more stacks of sheets assembled within individual bins of a collator. A belt lifting assembly controls heat transfer between the platen and belt by appropriate positioning of the belt with respect to the platen. The binder assembly is movable reciprocatively toward a sheet contacting binding position along a path perpendicular to the coplanar sheet edges. That assembly is further movable reciprocatively toward one or more additional binding positions along a path parallel to the coplanar sheet edges. In a second preferred embodiment, the binder assembly is swung along the first path by lost motion hinges.