摘要:
A continuous process of forming a sheet of thermoplastic material by sequentially pressing against one face of the hot sheet of material the cold tips of projections set in and extending normally from a first series of separately moveable combs and sequentially pressing against the second face of the material the cold tips of projections set in and extending normally from a second series of separately moveable combs so that the projections of the first series of combs interpenetrate with the projections of the second series of combs in such a manner that the projections of the first series are spaced from the projections of the second series by a distance greater than the thickness of the sheet; and the interpenetrated projections are substantially parallel during the act of interpenetration; and wherein the interpenetrated combs are moved along at the speed of the sheet until the sheet is set and the combs are then removed and recycled.
摘要:
A microwave wave generator device with oscillating virtual cathode, with axial geometry, includes at least one first reflector positioned in a cylindrical waveguide downstream of a thin anode, positioned at the entrance of the cylindrical waveguide, between a cathode and the cylindrical waveguide. The device further includes a tight magnetic ring of width (LM) along the longitudinal axis z, positioned externally around the cylindrical waveguide, between the thin anode and the first reflector.
摘要:
A laminate comprising a core consisting of a cuspated sheet consisting of a series of hollow projections projecting upwardly and downwardly from the median plane of said sheet and wherein the outer tips of the projections on the ends furthest from the median plane are closed and the ends of the projections in the median plane are open and wherein the projections form a series of pointed cusps said core laminated to a porous sheet wherein the points of the cusps on at least one face have been melted and at least partially allowed to impregnate the porous sheet.