Abstract: A sealing device for sealing at least two facing surfaces of two adjacent machine elements includes an inflatable sealing tube arranged in a groove in a first surface of a first machine element. The sealing tube can be filled with a medium to which pressure can be applied, and can be inflated by the medium as well as made to rest against a second surface of a second machine element, forming a seal. The ends of the sealing tube are each arranged in an insert piece. The insert pieces are each structured as a sleeve and surround the ends of the sealing tube under elastic pre-stress, forming a seal. The sleeves are each arranged in a recess of the first machine element that extends essentially crosswise to the lengthwise direction of the groove. In the non-pressurized state, the sealing tube and the face of the sleeves that faces the second surface of the second machine element are essentially flush with the first surface of the first machine element.

Abstract: The present invention is directed to a device for manufacturing foam cushions with coverings. The device broadly includes:(i) a mold having an upper half and a lower half and having a mix head associated therewith, wherein at least one half of said mold consists of a cavity and a surrounding stretching rim, the inner walls of said cavity having suction channels therein, said suction channels being connected to a vacuum source such that when a vacuum is applied, a covering is sucked into said cavity and against said inner walls, and(ii) a tenter adapted to be placed over said rim, said tenter having(1) an elastic, flexible roller element rotatably mounted in a groove in said tenter, said roller element being further characterized as(a) being capable of twisting around its axis,(b) being located in the region of the tenter which comes into contact with said rim, and(c) allowing said covering to slide when said covering is being sucked into said cavity.

Abstract: The present invention relates to an apparatus for the production of back-foamed products. The apparatus broadly consists of two mold halves, a stretching frame attached to one of the mold halves, and a pulsator device for applying pulsations to the edge region of the mold cavity.

Abstract: The invention relates to a vacuum mold for manufacturing cushions with back-foamed covers, wherein a section of cover material is stretched across a mold cavity, held down at the rim of the cavity, but allowed to slide into the mold cavity under the influence of a vacuum. The cover is also placed against and fitted to contourings (ridges and/or grooves) of the mold cavity, and subsequently back-foamed. The resulting flexible foam core is allowed to harden and the finished cushion is removed from the form.

Abstract: The present invention is directed to an apparatus for the production of back-foamed cushions from cover materials and foam comprising:(i) a mold comprising an upper mold half and a lower mold half, said lower mold half defining a cavity, the inside surface of which is capable of being covered by said cover material,(ii) a mix head associated with said mold, said mix head capable of introducing foam materials and/or reactants into said mold cavity, and(iii) at least one pressing element for pressing said cover material into said mold cavity, said pressing element having a pressing edge which consists of at least one balanced spring.

Abstract: The present invention is directed to an apparatus for the production of back-foamed covers from cover materials and foam comprising(i) a mold comprising an upper mold half and a lower mold half, the lower mold half having a cavity therein, the inside surface of which is capable of being covered by the cover material,(ii) a mixhead associated with the mold, the mixhead capable of introducing foam materials and/or reactants into the mold cavity,(iii) a pusher bar arranged on a mount for pushing the cover material into the mold cavity and being arranged above the lower mold half, the pusher bar being constructed such that when the bar is pushing the cover material into the mold cavity, a gap is formed between the edge of the mold cavity and the edge of the pusher bar, the gap being less than the thickness of the cover material,(iv) the lower mold half being movable towards and/or away from the pusher bar, and(v) the surface of the pusher bar facing the mold cavity edge being a frictional surface.

Abstract: The present invention is directed to an apparatus for the production of back-foamed cushions from cover materials and foam, comprising:(i) a mold comprising an upper mold half and a lower mold half, said lower mold half defining a cavity, the inside surface of which is capable of being covered by said cover material,(ii) a mix head associated with said mold, said mix head capable of introducing foam materials and/or reactants into said mold cavity,(iii) an upper ram provided above the lower mold half, and comprising several segments with contact pressure surfaces, which segments are mounted to be displaceable in guide bores of a supporting frame and wherein springs are associated with said segments, said springs acting on said segments in the direction of said mold cavity, and wherein when said upper ram is in the position of rest, the various contact pressure surfaces are located at different distances from the bottom of said mold cavity, and(iv) wherein said lower mold half is movable towards and away from