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US 4,228,209 AGranted
Wire reinforced corrugated board and method and apparatus for making same
OwnerMarc A. Chavannesinventor
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OwnerMarc A. Chavannesinventor
Estimating the term…
A reinforced laminate and the method and apparatus for the manufacture thereof which includes the embedding of reinforcing wire elements in plastic layers and plastic laminates to provide reinforced structures, producing a reinforced corrugated laminate including a corrugated layer with plastic layers applied to one or both sides thereof, producing a wire grid, corrugating the grid and applying overlying plastic layers and combining the planar and corrugated structures with cushioning and resilient foam materials.
A wire reinforced plastic structure comprising a wire reinforced corrugated plastic layer with said corrugations corrugating both said plastic layer and said wires and extending transversely of said wires, and at least one sheet of plastic bonded to the crest portions on one side of said corrugated layer.
The method of manufacturing reinforced corrugated plastic board comprising the steps of adhering a plurality of spaced parallel wires to a plastic web, corrugating said web transversely of said wires, and then adhering a second plastic web to the crest portions of at least one side of said corrugated web.
The method of forming a wire reinforced laminate comprising the steps of feeding a web about a first drum, feeding a second web about a second drum in close proximity to the first said drum, feeding a plurality of spaced wires between said webs as they pass between said drums, adhering said webs firmly one to the other with the wires disposed therebetween to complete the laminate, transversely corrugating the completed laminate, and adhering an overlying web to the crest portions of at least one side of said corrugated laminate.
The method of forming a reinforced plastic laminate comprising the steps of feeding a layer of plastic having a thermoplastic stage onto a drum feeding a plurality of spaced parallel reinforcing wire elements into overlying relationship with said plastic layer, feeding a second layer of plastic into overlying relationship with said wires, then with layers at a sealing temperature applying pressure to said heated layers to seal them one to the other, corrugating said resultant laminate transversely of said wires and then sealing an overlying plastic layer to the crest portions on at least one side of said corrugated laminate.
Apparatus for manufacturing reinforced corrugated plastic board comprising a heated drum, means for feeding a plastic web about said drum, means for adhering a plurality of wires in spaced parallel relationship to and lengthwise of said web while on said drum, a pair of cooperating corrugating rollers, means for feeding said plastic and wire structure through said corrugating rollers and means for adhering a second of plastic web to the crest portions on a least one side of said corrugated plastic and wire structure.
Apparatus for manufacturing a reinforced plastic material comprising a drum, means for feeding a first layer of plastic onto said drum, means for feeding a plurality of reinforcing wires into overlying relationship with said first layer, means for feeding a second layer of plastic into overlying relationship with said wires, pressure applying means subjecting said layers, while at a sealing temperature, to a pressure to embed the wires in said layers and seal the layers one to the other to form a resultant laminate, means for corrugating said resultant laminated structure transversely of said wires, means for reheating said structure and means for sealing at least one overlying layer to the crest portions of said corrugated structure.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Producing articles with hollow walls: formed with structures, e.g. cores placed between two plates or sheets, e.g. partially filled
Having movable moulds or mould parts: rotatable about an axis
Transverse to direction of feed: using rolls or endless bands
Oriented in a single direction, e.g. roofing or other parallel fibres: arranged in parallel planes or structures of fibres crossing at substantial…
Term ended 14 Oct 1997 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates to reinforced plastic sheet material in both substantially planar and corrugated form and to novel and improved methods and apparatus for manufacturing such materials. The invention further relates to the lamination of the aforesaid reinforced plastic sheets with other resilient and cushioning materials which are particularly suited among other applications for packaging articles for shipment.
This invention has as one of its objects the provision of a novel and improved corrugated material formed of plastic sheets and relatively stiff wire reinforcing elements which is not only moistureproof but also may be made impervious to gases and which will neither deteriorate nor weaken even when constantly subjected to moisture. Depending upon the application, the reinforcing elements may either be coated with a plastic or uncoated and are preferably in the form of longitudinal and transverse elements secured in spaced relationship to form a structure affording substantial strength in the finished material. Moreover, reinforcing elements of a variety of diameters and plastic layers of various thicknesses may also be utilized depending upon the strength and stiffness desired.
Another aspect of the invention involves an improved plastic sheet material having longitudinal and transverse wires embedded therein to provide materially added strength and at the same time protect the wires from corrosion or deterioration from water and gases. The sheet material may be either a single layer or laminate or be in the form of a corrugated structure with plastic layers on one or both sides thereof.
The above and other objects of the invention will become more apparent from the following description and accompanying drawings forming part of this application.
In the drawings:
FIG. 1 is a diagrammatic view of the apparatus for forming a plastic laminate having longitudinal wires disposed therein;
As pointed out above, the improved product comprises a plastic sheet or laminate having reinforcing wires disposed therein or in the alternative may comprise a coated or uncoated corrugated wire grid having layers of plastic on one or both sides thereof. One method and apparatus for forming reinforced plastic sheet material in accordance with the invention is shown in FIGS. 1 and 1A through C. While the resultant product produced by the apparatus of FIG. 1 as well as the products produced by the apparatus shown in FIGS. 2, 4, 5 and 6 are useful for many purposes, it will be shown that such products are also useful in the formation of other types of reinforced products in accordance with the invention for structural, packaging and other similar applications.
Reference is now made to FIG. 1 which illustrates one embodiment of the invention for fabricating a plastic laminate having longitudinal reinforcing wires embedded therein. More specifically the apparatus includes a relatively large heated drum 10 onto which the first film 11 which may be precoated with a heat sensitive adhesive, is fed from the roll 12 and about roller 13. If desired, the roller 13 may also be heated in order to increase the temperature of the film 11 just prior to its engagement with the drum 10. Immediately following the application of the film 11 to the drum 10, a plurality of wires 14 are fed from a plurality of spools 15' about rollers 15 and 16 and onto the drum 10 and in overlying relationship with film 11. The roller 16 is preferably provided with a plurality of spaced, annular, wire receiving grooves to maintain the desired wire spacing. The roller 15 which initially spaces the wires will be described in detail in connection with FIG. 3.
A second film 17, which may be pre-coated with a heat sensitive adhesive is fed from a roll 18 and about the roller 19 in overlying relationship with the wires 14. The laminate then proceeds about the drum 10 and sufficient heat is applied to the laminate so that the two films can be sealed one to the other with the wires therebetween. The temperature of the drum 10 is, of course, related to the speed so that adequate heat is transferred to the plastic films. For instance, if the drum 10 is rotating at a relatively high speed the temperature of the drum can be at or even above the melting point of the plastic film 11. On the other hand, should the drum be operated at a low speed it would be necessary to maintain the temperature of the drum slightly below the melting point of the film 11.