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7238317 |
Method of continuously producing a twin-wall pipe with a ventilation zone between a socket and an adjacent elevation
A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a...
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6759001 |
Method for producing embossed poly(vinyl alcohol) film
A method for producing an embossed PVA film, which includes embossing the film such that the crystallinity index of the emboss top is 0.50-0.90. The invention provides an embossed PVA film superior...
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6630094 |
Flexible plastic hinge having tear resistance
A tear-resistant flexible hinge structure is placed between a pair of substantially rigid panels so as to permit the panels to be hinged one with respect to the other, where the flexible hinge is...
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5656357 |
Molded corrugated cardboard and method for producing same
Corrugated cardboard is molded into a desired shape for use in interior trim, such as for use in lining the ceiling of an automobile. The molded corrugated cardboard is obtained by applying a...
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5543204 |
Bi-directionally corrugated sandwich construction
A bi-directionally corrugated sandwich construction for use in applications equiring high-strength, light-weight components is disclosed. The sandwich construction comprises first and second face...
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5508083 |
Machine direction fluted combined corrugated containerboard
Provided is an improved corrugated containerboard that includes a corrugated medium sandwiched between and secured to a top liner and a bottom liner. The corrugated medium, top liner, and bottom...
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5484640 |
Honeycomb structure having stiffening ribs and method and apparatus for making same
An improvement in a corrugated strip having major flat sections which extend between longitudinal edges of the strip and which are joined along lateral edges by intermediate sections extending...
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5443891 |
Low amplitude wave-board
A low amplitude wave-board panel having improved bending strength and bending stiffness properties is provided. More specifically, the amplitude of the waves is substantially equal to, or less than...
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5443779 |
Method of production of reinforced composite corrugated body and method of formation of corrugating rollers for use therein
The strength and workability of a reinforced composite corrugated body are improved. A corrugated body is produced such that corrugate lines provided with vertically spaced ridges and grooves...
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5340301 |
Corrugated substructure forming tool
A process and apparatus for rapidly and accurately forming corrugated substructures of complex shapes utilizing composite material A plurality of movable elongated ribs are positioned on a base...
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5340638 |
Bulk material for packaging, packaging unit using same, process and apparatus for producing them
Chips of cardboard, in particular of packing cardboard, which are formed by cutting flat, preferably used packing cardboard lengthwise and crosswise, and the bulk volume of which is increased by...
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5339520 |
Braided high-temperature packing
A high temperature, high pressure resistant packing (e.g., for the packing gland of a valve stem) has a core of density 1.3-1.6 gm/cc that includes a plurality of strands, each strand including a...
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5338404 |
Method of forming a lignin reinforced cellulosic product
Preformed cellulosic linerboard as utilized in the manufacture of corrugated products is provided with enhanced crush strength by a combined lignin-coating and calendering treatment. The linerboard...
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5223326 |
Corrugated metal-clad sandwich panel with a wafer composite core
A corrugated metal-clad sandwich panel with a wafer composite core is provided. The single stage process for the panel manufacture involves utilizing a press platen system which is mechanically...
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5100607 |
Blow-molding methods to form containers having upper and lower sections of different thicknesses
A plastic container having base and sidewall portions is provided with corrugations as a unitary part of the sidewall portion. The sidewall portion is of a thickness that would not be capable of...
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5068075 |
Method of blow molding aseptic bottles
A parison is blow molded to form a sealed aseptic bottle for subsequent opening and filling. The pressure of the gas in the interior of the bottle when sealed is sub-atmospheric to prevent...
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4721593 |
Process for molding and curing a composite skin-stiffeners assembly
A process using molds for curing a composite skin-stiffeners assembly from fiber material impregnated with a resin. This process allows molding and co-curing of single-skin type panels with...
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4575400 |
Apparatus for manufacturing corrugated tubes
A method and apparatus for forming a corrugated tube having a smooth inner wall surface and a corrugated outer wall are provided. A first strip of resin material is wrapped around first portions of...
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4504537 |
Rug underlay comprising open lattice with partially fused needle punched fiber layers
A rug underlay comprising a central open lattice of stiffening material, and intermediate layer of fiber batting on each side of the lattice needle punched through the lattice, an upper outer...
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4504538 |
Rug underlay of fibers needled into mesh
A rug underlay comprising a central open lattice of stiffening material, and intermediate layer of fiber batting on each side of the lattice needle punched through the lattice, an upper outer...
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4474717 |
Method of making a twin-wall internally corrugated plastic structural part with a smooth non-cellular skin
A method and apparatus for making a twin-wall internally corrugated plastic structural part provided with a smooth, dense, solid, thin walled, non-cellular skin comprising injecting a thermoplastic...
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4255380 |
Method and apparatus for manufacturing signs or the like carrying information which is different for different viewing angles
A sign is fabricated which presents different messages depending on the angle of view. The fabricated sign has walls, different sides having parts of different messages. The method of fabrication...
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4228123 |
Method of making biaxially oriented nonwoven fabrics
A nonwoven fabric having alternating stripes of high fiber density and low fiber density is made in such a manner that the high fiber density stripes run across the fabric and maximize the cross...
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4157604 |
Method of high speed yarn texturing
Multifilament thermoplastic synthetic yarn is textured by an improved process involving propelling the yarn through an energy tube by superheated steam to strike, at an oblique angle, an unyielding...
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4145199 |
Method and apparatus for forming kinky fibers from heat-softenable material
The disclosure embraces a method of and apparatus for processing heat-softenable materials, such as glass, to form fibers or filaments from streams of the material and particularly a method of and...
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4115611 |
Selectively bonded composite tape
A partially compacted fiber-reinforced metallic tape has a layer of collimated fibers between two layers of metal foil, the foil being partially compacted around the fibers, somewhat deforming the...
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4104430 |
Vacuum formable materials
The preparation of a laminate which can be shaped by vacuum forming is described. The laminate is of a stretchable fabric, a plasticized vinyl chloride polymer layer and sandwiched between them a...
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3969473 |
Method of corrugating a web of thin thermoplastic material in a continuous production
Method for continuously forming a corrugated web of thermoplastic material in which the corrugations extend diagonally across the web. The web is first softened by heat and then passed to a molding...
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3953566 |
Process for producing porous products
This invention provides a tetrafluoroethylene polymer in a porous form which has an amorphous content exceeding about 5% and which has a micro-structure characterized by nodes interconnected by...
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3932248 |
Method and apparatus for making laminated board with a pocketed core
Method and apparatus are disclosed for making a laminated board of thermoplastic resin. The laminated board is formed of a pocketed core sheet having inverted and non-inverted pockets disposed...
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3931383 |
Method for continuously forming plastic sheet with vacuum pressure
A method for forming an extruded plastic sheet with vacuum pressure and without mating dies. The plastic sheet is extruded onto a heated portion of a supporting bed which maintains the sheet in a...
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3655454 |
PROCESS FOR PRODUCING A HOLLOW BODY OF NONDEVELOPABLE FORM FROM A STARTING MATERIAL OF A DEVELOPABLE FORM
A process for manufacturing a hollow body having a nondevelopable form from a single piece of starting material which is flexible and which is either flat or in a developable form. The process...
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3540079 |
APPARATUS FOR CORRUGATING SHEET MATERIAL
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3477894 |
APPARATUS FOR PRODUCING MOLDED PLASTIC GOODS
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3471600 |
METHOD FOR CONTINUOUSLY FORMING CORRUGATED SHEETS
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3470280 |
METHOD FOR THE PRODUCTION OF DIAGONALLY PLEATED PAPER MATERIAL
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3444284 |
UNIFORM COOLING OF BLOW MOLDED ARTICLES
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3397261 |
Process and devices for chevroning pliable sheet material
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3379805 |
Method of making corrugated hose
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3350484 |
Method and apparatus for making battery separators and the like
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3330708 |
Floor coverings
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3231647 |
Method of and apparatus for corrugating sheets of fibrous cement
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3226458 |
Method and apparatus for continuously producing molded articles and sectional sheets of plastics
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3179726 |
Vacuum corrugator
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3178494 |
Method and apparatus for forming longitudinal corrugations in sheet material
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3077000 |
Method and apparatus for manufacture of transverse contoured reinforced plastic sheet material
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3682747 |
Title is not available
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3704189 |
Title is not available
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3584092 |
Title is not available
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3676263 |
Title is not available
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