Abstract: A plurality of thermoplastic tubular segments having substantially equal lengths are arranged in horizontal side-by-side relationship with the respective ends of the tubular segments aligned in a generally common plane. Small portions of the respective ends of the tubes are cut by a thermal cutting device which simultaneously fuses the ends of the tubes to produce a consolidated unitary structure having a thickness defined by the distance between the fused ends of the tubular segments. The consolidated unitary structure is then rotated to a horizontal position, with the tubular segments vertically oriented, and cut along at least one horizontal plane to produce fused cores having a thickness defined by the vertical position of a horizontally disposed thermal cutting device.

Abstract: Core-type structures are formed by extruding elongated tubular members or sheets of a thermoplastic material that are subsequently cut into segments or plates having a defined length and then assembled into a bundle. The bundle is then simultaneously cut at a number of spaced-apart locations along the length of the bundled segments, or plates, whereby a plurality of separate core structures are simultaneously formed.

Abstract: Core-type structures are formed by extruding elongated tubular members or sheets of a thermoplastic material that are subsequently cut into segments or plates having a defined length and then assembled into a bundle. The bundle is then simultaneously cut at a number of spaced-apart locations along the length of the bundled segments, or plates, whereby a plurality of separate core structures are simultaneously formed.

Abstract: Core-type structures are formed in a continuous process by assembling cut tubes or sheets of a thermoplastic material that are aligned, cut into separate continuous structures which are then subsequently cut into separate structures suitable for use as a core member.

Abstract: Core-type structures are formed in a continuous process by assembling cut tubes or sheets of a thermoplastic material that are aligned, cut into separate continuous structures which are then subsequently cut into separate structures suitable for use as a core member.

Abstract: A door seal has a base portion comprising straight sections joined at their ends to form corner joints with another section, at least four first seal sections each of which are disposed at a respective one of the corner joints, and a plurality of second seal portions each having a length that extends between a spaced pair of the first seal sections. The first seal sections comprise a pair of spaced lip seals, whereas the second seal sections comprise a lip seal and a compression seal. The seal avoids the problem of undesirable compression seal distortion at the corners joints.

Abstract: The specification discloses a two-piece peripheral channel gasket for a door or panel to provide a seal between the door and another door or a supporting frame. In the preferred embodiment, the channel gasket comprises a rigid channel member to be sealed to the door edge and having two spaced grooves facing away from each other for receiving two spaced connecting legs extending from a base of a flexible sealing gasket. The connecting legs extend from the plane of the base of the gasket and then inward toward each other. Each connecting leg includes an enlarged head extending from a smaller neck and having surfaces which taper toward a smaller end. Each receiving groove of the channel member has a smaller entrance portion which decreases in size to an enlarged holding zone for receiving the enlarged head of a connecting leg of the gasket.