Patents by Inventor Heinz Vetter
Heinz Vetter has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4859392Abstract: A smooth film web is used as a smoothing surface in the nip between a cooling roll and a pressure roll. The pressure roll need not be coolable, and it preferably has an elastic surface layer. Since the elastic surface layer does not come into immediate contact with the extruded web, it need not be highly polished. Consequently, a high running time is achieved.Type: GrantFiled: May 24, 1988Date of Patent: August 22, 1989Assignee: Rohm GmbH Chemische FabrikInventor: Heinz Vetter
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Patent number: 4733718Abstract: Heat exchanger or heat accumulator bodies which are simple to produce. The bodies consist of a stack of extruded hollow chamber panels with plane smooth outer walls and webs that join the outer walls in a single piece. The hollow chamber panels are joined to one another in the stack on the front side by locking connections. The locking connections can be produced with an inserted electrical band heater, by glue seams, or by undercut interlockings. The hollow chamber panels are not joined to one another in the in-between areas or are not everywhere joined in the in-between areas.Type: GrantFiled: July 3, 1985Date of Patent: March 29, 1988Assignee: Roehm GmbH Chemische FabrikInventors: Hartmut Schikowsky, Heinz Gross, Herbert Helm, Klaus E. Poehlmann, Karl-Heinrich Schanz, Heinz Vetter
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Patent number: 4707393Abstract: A plastic multilayer multiple-wall panel, manufactured by the coextrusion of a plurality of adhesively bonded layers of thermoplastically extrudable synthetic resins by means of a multicomponent extrusion die, and comprising a supporting core layer of polycarbonate resin with a plurality of continuous hollow chambers, a UV absorption layer, boned on one or both sides of said core layer and made of a synthetic resin containing at least 2 weight percent of a UV absorber that is volatile at elevated temperatures, and a cover layer, on that side of the UV absorption layer which faces away from the core layer, of a synthetic resin which contains less than 2 weight percent of volatile UV absorber.Type: GrantFiled: November 18, 1983Date of Patent: November 17, 1987Assignee: Rohm GmbHInventor: Heinz Vetter
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Patent number: 4707643Abstract: In the drive for a textile working machine, for the synchronized yet independently operable drive of at least two shafts, brake-clutch units associated with each shaft are provided, which are driven by a common electric motor. To achieve a regulation and control having good dynamic properties and fast response, provision is made for the brake-clutch units to be controlled such that the rotatory speed of the driven shaft of the first brake-clutch unit is given as a required value, and the rotatory speed of the second brake-clutch unit is synchronized through the rotatory speed of the driven shaft of the first brake-clutch unit, systems being provided for establishing the rotatory speed ratio.Type: GrantFiled: May 12, 1986Date of Patent: November 17, 1987Assignee: Frankl & Kirchner GmbHInventors: Gustav Rohr, Karl-Heinz Vetter
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Patent number: 4647489Abstract: The novel multilayer web plate comprises two generally planar outer walls and webs joining said walls to form a unit construction. According to the invention, the outer walls each comprise a combination of a core layer representing more than half the thickness of the outer wall and comprised of an extrudable, stiff plastic material with optical index of refraction n.gtoreq.1.48, and inner and outer surface layers adhesively bonded to both faces of the core layer and comprised of a hard plastic material with an optical index of refraction n.ltoreq.1.46. With this configuration, reflection losses of the transmitted light are avoided, and the light-permeability is substantially improved.Type: GrantFiled: May 8, 1986Date of Patent: March 3, 1987Assignee: Rohm GmbH Chemische FabrikInventors: Werner Siol, Wolfgang Arnold, Heinz Vetter
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Patent number: 4569875Abstract: A multilayer web panel with improved impact resistance having two substantially flat exterior walls and webs connecting the walls as one piece. At least one exterior wall has at least two adhesively bonded layers of one or more plastics, wherein the bearing layer of the exterior wall consists of an acrylic glass layer which is about 50% or more of the total thickness of the exterior wall, and the inner side of the acrylic glass layer has a thinner inner layer which is adhesively bonded thereto and is made of a plastic with a higher elongation at rupture than that of the acrylic glass.Type: GrantFiled: January 13, 1984Date of Patent: February 11, 1986Assignee: Rohm GmbH Chemische FabrikInventors: Klaus E. Pohlmann, Heinz Vetter, Ernst Friederich
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Patent number: 4515648Abstract: What is disclosed is a method for making a gastight multiple-walled panel of extruded resin from an integrally extruded hollow panel comprising two parallel, plane outer walls having supporting partitions disposed between them and defining long hollow cells with open end faces, which method comprises heating the hollow panel at least in the area of the open end faces of said hollow cells until the resin is in the thermoplastic state, and then heat sealing the two outer walls in the thermoplastic area thereof in a gastight manner either to each other or to a tape of a further thermoplastic material covering the end faces, the seal so produced being held for at least 1 minute at a temperature ranging from 10.degree. C. beneath the Vicat softening point to 20.degree. C. above the Vicat softening point of the resin.Type: GrantFiled: December 15, 1982Date of Patent: May 7, 1985Assignee: Rohm GmbHInventors: Klaus Kolbe, Walter Hellmann, Otmar Krajec, Hartmut Schikowsky, Heinz Vetter
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Patent number: 4513048Abstract: Webbed multiple sheets comprising two substantially parallel, substantially plane polymethylmethacrylate outer layers and at least one center layer between said outer layers, wherein said outer layers and said center layer are bonded together into one piece by webs and wherein said center layer or layers comprise a thermoplastic material having increased tenacity, increased zero viscosity or a combination thereof in molten condition as compared with the material of said outer layers, thereby reducing sagging of said center layer or layers during extrusion.Type: GrantFiled: August 31, 1983Date of Patent: April 23, 1985Assignee: Rohm GmbH Chemische FabrikInventors: Peter Kaube, Karl-Heinz Schanz, Heinz Vetter, Jens Muller
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Patent number: 4477521Abstract: What is disclosed is a light-transparent body comprising a first coextruded layer of a first extrudable light-transparent synthetic resin and a second coextruded layer of a second extrudable light-transparent synthetic resin different from said first resin, wherein said first and second coextruded layers are adjacent and wherein at least said first layer contains a dyestuff capable of fluorescing in the visible region and said second, adjacent, layer is free of the dyestuff present in said first layer.Type: GrantFiled: April 12, 1982Date of Patent: October 16, 1984Assignee: Rohm GmbHInventors: Jurgen Lehmann, Heinz Vetter, Wolfgang Arnold
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Patent number: 4372739Abstract: What is disclosed is an adjustable wide-slit extrusion nozzle containing a distributor channel having a straight exit edge and a cross-section taken from the supply port for the nozzle to one end thereof which corresponds to the equation:R.sub.i =R.sub.o (b/B).sup.1/3,wherein:B is the width of the distributor channel from the supply port to one end of the channel;b is a width coordinate measured from one end of the distributor channel;R.sub.o is the hydraulic radius of the distributor channel at the supply port; andR.sub.i is the hydraulic radius of the distributor channel at the distance b from the channel end.At least one choker bar insert is placed between the distributor channel and the nozzle mouth; the choker bar has a damming area surface whose length dimensions L.sub.i in the direction of flow at distances b from the channel end correspond to the equationL.sub.i =L.sub.o (b/B ).sup.2/3,whereinL.sub.o is the length of the damming strip at the supply port;L.sub.Type: GrantFiled: May 13, 1981Date of Patent: February 8, 1983Assignee: RoGmbHInventors: Heinz Vetter, Ernst Friederich
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Patent number: 4308354Abstract: What is disclosed are a method for making a transparent impact-resistant polymer comprising a rubbery phase of grafted polybutadiene and a hard copolymer phase, which polymer is adaptable to use as a molding material, which method comprises:(1) in a first polymerization stage, dissolving a solid polybutadiene rubber in a monomer mixture comprising (a) methyl methacrylate, (b) styrene, and (c) at least one of methyl acrylate or ethyl acrylate to give a solution containing from 3 to 10 percent by weight of said rubber, and then polymerizing the solution using an initiator promoting graft copolymerization and in the presence ab initio of a chain transfer agent until an amount of said monomer mixture which is one to two times the weight of said polybutadiene rubber introduced is converted, said monomers (a), (b), and (c) being present in said monomer mixture in a ratio by weight of (73.+-.5): (22.+-.2); (5.+-.Type: GrantFiled: January 19, 1981Date of Patent: December 29, 1981Assignee: Rohm GmbHInventors: Karl A. Jung, Manfred Munzer, Heinz Vetter, Winfried Wunderlich
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Patent number: 4261777Abstract: What is disclosed are methods and apparatus for coating a hollow synthetic resin tube with a pre-formed film coating by applying the film coating to an exterior surface of such a tube directly after extrusion, while the resin thereof is thermoplastic, and then passing them through a shaping channel while maintaining a modest pressure differential between the interior and exterior of the tube, whereby the film coating and tube are adhered by the compression thereof against the walls of the shaping channel.Type: GrantFiled: November 24, 1978Date of Patent: April 14, 1981Assignee: Rohm GmbHInventors: Heinz Vetter, Franz Wenzel
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Patent number: 4235834Abstract: A method is disclosed for biaxially stretching a band of thermoplastic resin which comprises attenuating a band of unstretched resin, in a forming zone while the resin is in the thermoelastic condition, by passing the band between two surfaces spaced at a distance less than the thickness of said band of unstretched resin while permitting said band to expand in width, and then cooling said band to a temperature below the softening point of the resin while maintaining the dimensions of the attenuated and expanded band; apparatus for performing such a method is also disclosed.Type: GrantFiled: February 13, 1978Date of Patent: November 25, 1980Assignee: Rohm GmbHInventors: Heinz Vetter, Ernst Friederich, Karl-Heinz Schanz, Hartmut Schikowsky
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Patent number: 4211525Abstract: What is disclosed is a method and apparatus for forming a radially expanded and stretched tube of synthetic resin having a plurality of longitudinal-support members, corrugated in the longitudinal tube direction, joined to and extending between two opposing tube walls, by extruding the tube such that that areas of the opposing walls extending between two adjacent support members comprise alternating thick and thin wall portions in the longitudinal direction and every thin portion has a laterally-adjacent thick wall portion, whereby on subsequent stretching and expansion, the thick and thin wall portions stretch disproportionately and deform the support members attached thereto unequally to effect their corrugation in the longitudinal direction.Type: GrantFiled: December 5, 1978Date of Patent: July 8, 1980Assignee: Rohm GmbHInventor: Heinz Vetter
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Patent number: 4179529Abstract: A method is disclosed for lubricating surfaces which are in temporary frictional contact which comprises introducing between said surfaces a lubricating liquid which can be solidified by heat or radiation and, after said temporary contact is broken, then solidifying said liquid by heating said surfaces or exposing said surfaces to radiation.Type: GrantFiled: March 13, 1978Date of Patent: December 18, 1979Assignee: Rohm GmbHInventor: Heinz Vetter
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Patent number: 4153663Abstract: Methods and apparatus are disclosed for bending mono-axially or bi-axially stretched sheets of a thermoplastically deformable synthetic resin by heating one side of the sheet above the softening temperature of the resin while the temperature on the other side is beneath the softening temperature, whereupon the resin sheet bends by itself or can be bent with forming tools.Type: GrantFiled: July 27, 1976Date of Patent: May 8, 1979Assignee: Rohm GmbHInventors: Heinz Vetter, Ernst Friedrich