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Class 156/244.21 - Differential fluid pressure used


Subclass of Class 156 - Adhesive bonding and miscellaneous chemical manufacture
Definition: Processes including the application of positive or negative
No. of patents: 46
Last issue date: 05/13/2003


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NumberTitleIssue Date
6562170Method of producing film having a cloth-like look and feel
A method for producing a film with attached fibrils having a cloth-like look and feel. A flocking or metering device is provided for dispensing a layer of the fibrils. The fibrils are next delivered onto a moving vacuum belt, which has a porous surface fo...
05/13/2003
6537404Continuous manufacturing method and manufacturing apparatus of thermoplastic polyester resin foam
A thermoplastic polyester resin is fed into a twin extruder, wherein a resin is heated for melting, thereby removing moisture in the resin by evacuating and sucking from a vent port thereof, injecting a foaming agent into the resin to which is pushed out ...
03/25/2003
6318435Machine for the manufacture of a non-slip fabric
The invention relates to a machine for the manufacture of a non-slip fabric, comprising: a drum made to rotate around its own axis with a number of cup-shaped seatings on its surface, which seatings communicate with the inside of the drum, the inside of t...
11/20/2001
6277231Method for producing a honeycomb core in thermofusible material, and device for implementing same
This process consists: in continuously extruding, with the aid of a multislot die, parallel sheets (31) of thermally fusible material inside a cooling chamber (4), with the creation of a seal between the longitudinal edges of the sheets and the walls of t...
08/21/2001
6245183Process for manufacturing tubing having a metal layer with an external surface overlaying by multiple plastic layers bonded thereto
A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum ...
06/12/2001
6194049Polymeric waterproofing membrane
A polymeric waterproofing membrane is provided which has an improved biaxial elongation compared with conventional polymeric waterproofing membranes. The membrane is a composite of an upper layer and a lower layer as well as an in between situated barrier...
02/27/2001
5976298Method of producing multilayer thermoplastic pipe
For the production of a multilayer pipe of thermoplastic material, in particular polyolefine, an extrusion equipment is provided, extruding at least one tube in a direction of production. A calibrating arrangement for forming a pipe of externally profiled...
11/02/1999
5764521Method and apparatus for solid prototyping
An improved extrusion-based manufacturing system includes one or more extruders, with each extruder containing at least two stages of increasing pressurization. In a preferred embodiment, a first stage of pressurization is created by the motion of a solid...
06/09/1998
5698054Method and apparatus for the lamination of apertured or non-apertured three-dimensional films to apertured or non-apertured three-dimensional and/or flat films
The present invention provides an improved method for laminating a first three-dimensional apertured or non-apertured film material to a second flat or three-dimensional apertured or non-apertured film material utilizing the heat generated by the extrusio...
12/16/1997
5658406Methods of making telecommunications cable
Method of making a twisted conductor wire unit in which each wire of the pair is individually insulated. The twisted pair is provided with an outer extruded polymeric layer while a vacuum is applied to the pair at the extrusion position. The vacuum draws ...
08/19/1997
5595623Method for making a barrier film with improved extensibility for cheese packaging
A method for making a film which is useful in the packaging of newly formed blocks of cheese and demonstrates flexibility, extensibility, and improved sealing strength comprises extruding an ethylene vinyl acetate/very low density polyethylene sealing lay...
01/21/1997
5421921Segmented slot die for air spray of fibers
A slot die for producing a fibrous web of adhesive material includes a segmented shim having a plurality of fingers in said slat dividing adhesive material into a plurality of adhesive streams. The fingers have tapered ends which are flush with or extend ...
06/06/1995
5358782Coextruded multi-layered, electrically conductive polyimide film
An electrically conductive polyimide film having good physical properties and uniform electrical conductivity, prepared by coextruding at least two aromatic polyamic acid solutions, one of which contains a conductive carbon filler, to form a conductive mu...
10/25/1994
5358580Process for manufacturing hose having reinforcement incorporated therein and apparatus therefor
A hose manufacturing process and a method therefor capable of leading to an increase in production efficiency and productivity and improving configurational and dimensional stability of the hose. A die is provided for co-extruding a flexible synthetic res...
10/25/1994
5296061Process for producing a tubular nonwoven fabric and tubular nonwoven fabric produced by the same
Disclosed are a process for producing a tubular nonwoven fabric and tubular nonwoven fabrics produced by the same. In the process, a web is formed on a first rotating cylinder by catching fibers carried to the surface of the first rotating cylinder by a f...
03/22/1994
5225140Method and apparatus for manufacturing a fiber reinforced thermoplastic sheet-shaped molding by using suction to partially impregnate a fiber web
An apparatus for and a method of manufacturing a fiber reinforced thermoplastic sheet-shaped molding including a pre-impregnating process and a final impregnating process. A sheet of thermoplastic resin and a web of reinforcement fibers are supplied throu...
07/06/1993
5077449Electrical cable with corrugated metal shield
An electrical cable having a jacket surrounding a metal shield which, in turn, surrounds the cable core. The jacket comprises a polyolefin with a modifier provided by a carboxylic acid or anhydride thereof with the jacket lying in intimate overall contact...
12/31/1991
5026450Method of applying adhesive to the waist elastic material of disposable garments
A method of applying adhesive to the heat shrinkable, waist elastic member of a disposable garment, and for attaching the elastic member to the backing sheet of the gartment, comprises extruding an adhesive bead from an adhesive dispenser and impacting th...
06/25/1991
4995930Process for the production of a film combination
A process for the production of a film combination consisting of a perforated plastic film and a fibrous material, which are laminated together by means of the pneumatic vacuum used to perforate the film when it is in a thermoplastic condition....
02/26/1991
4980001Applying jacket material to corrugated metal shields of telecommunications cable
In a method of applying a jacket to a metal shield of a cable, the jacket comprises a polyolefin having a modifier provided by a carboxylic acid or its anhydride. As the jacket extrudate passes onto the shield, air pressure is lowered at the surface of th...
12/25/1990
4968370Replication of information carriers
A process for producing an information carrier containing recorded audio and/or video information wherein a web of a thermoplastic material is extruded onto the patterned surface of a metal master and pressure is applied to force said thermoplastic materi...
11/06/1990
4943463Large dimensional thermoplastic articles
Thermoplastic articles such as fenders, of large cross-sectional dimensions, may be made by extrusion without shrinkage voids by extruding a first stream of theremoplastic as a hollow profile, and extruding a second stream of molten thermoplastic by a sec...
07/24/1990
4892603Irradiated multilayer film for primal meat packaging
A heat-shrinkable, multilayer film suitable for use in fabricating bags for packaging primal and sub-primal meat cuts and processed meats. The multilayer film has a first outer layer of an ethylene-vinyl acetate copolymer, a core layer of a barrier film c...
01/09/1990
4871413Apparatus for manufacturing tubular lining material
A tubular lining material and a method and apparatus for manufacturing same, the tubular lining material being suitable for reinforcing pipe lines and comprising a tubular textile jacket having on the external surface thereof a coating of plural synthetic...
10/03/1989
4790893Replication of information carriers
A process for producing an information carrier containing recorded audio and/or video information wherein a web of a thermoplastic material is extruded onto the patterned surface of a metal master and pressure is applied to force said thermoplastic materi...
12/13/1988
4770731Method of making a patch for a shrinkable bag
Disclosed is a protective patch for biaxially a heat shrinkable, thermoplastic vacuum bag for protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags. The patch is made from multi-layer ...
09/13/1988
4765857Protective patch for shrinkable bag
Disclosed is a protective patch for biaxially a heat shrinkable, thermoplastic vacuum bag for protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags. The patch is made from multi-layer ...
08/23/1988
4749430Method of making an encapsulated assemblage
An encapsulated assemblage and a process for making comprising: (a) silanizing a substrate; (b) coating the silanized substrate with at least one thin extruded coherent film consisting essentially of: (1) about 75-90 parts by weight of: (a) about 65 to about 75 par...
06/07/1988
4704244Method for extrusion production of large dimensional thermoplastic articles
Thermoplastic articles such as fenders, of large cross-sectional dimensions, may be made by extrusion without shrinkage voids by extruding a first stream of thermoplastic as a hollow profile, and extruding a second stream of molten thermoplastic by a seco...
11/03/1987
4675208Coating method and apparatus
A coating method wherein a part of coating liquid supplied from a liquid supplying device is circulated through a closed passage running somewhere between the liquid supply device and a liquid delivery nozzle of a liquid applying section from the liquid a...
06/23/1987
4657625Apparatus for producing sheet having many hollow bodies from thermoplastic material
An apparatus for producing a sheet having many hollow bodies from thermoplastic material such as polyethylene, used for cushioning and insulation, is disclosed. Film extruded from a T die, after being cooled, is heated by an induction heating roller with ...
04/14/1987
4623504Method and apparatus for making post-tensioning tendons for concrete
A method of making a tendon suitable for use in the post-tensioning of concrete as well as for other applications is disclosed. The method comprises the steps of coating a wire or a multiple-wire strand with a thin coat of a corrosion inhibitor. In the pr...
11/18/1986
4552709Process for high-speed production of webs of debossed and perforated thermoplastic film
The present invention provides a process for debossing and perforating a substantially continuous web of substantially planar thermoplastic film, using a forming structure having a patterned forming surface with holes and an opposed surface. The forming s...
11/12/1985
4473525Method of making fluid distribution devices particularly useful for drip irrigation
A fluid distribution device particularly useful as a drip irrigation emitter, comprises: a continuous plastic tube for conveying the fluid therethrough; and a plurality of individual plastic sleeves enclosing and fixed to the tube at longitudinally-spaced...
09/25/1984
4405399Method and apparatus for manufacturing dentifrice containing dispersed speckles
A method for manufacturing a dentifrice containing dispersed speckles or bits therein includes converting a gel or paste dental composition into flowing stream or ribbon form, directing a stream or curtain of speckle or bit particles onto the ribbon of de...
09/20/1983
4385954Method for applying binding agents to fibrous webs
A method and system for applying a foamed binding agent to a fibrous web is disclosed. The invention is characterized by the use of an extruder having an upper lip extending 1/16 to 1/4 inch beyond the lower lip, and by the drawing of a vacuum beneath the...
05/31/1983
4376670Method for coating paper with a plastic pattern
A method and apparatus for applying to a surface of a continuous travelling web of paper a regular mesh-like pattern of thermoplastic stripes or strands. The plastic stripes or strands are extruded from nozzles supported a short distance above the travell...
03/15/1983
4358332Apparatus for coating paper with a plastic pattern
A method and apparatus for applying to a surface of a continuous travelling web of paper a regular mesh-like pattern of thermoplastic stripes or strands. The plastic stripes or strands are extruded from nozzles supported a short distance above the travell...
11/09/1982
4348251System for applying binding agents to fibrous webs
A method and system for applying a foamed binding agent to a fibrous web is disclosed. The invention is characterized by the use of an extruder having an upper lip extending 1/16 to 1/4 inch beyond the lower lip, and by the drawing of a vacuum beneath the...
09/07/1982
4306924Method and apparatus for producing a plastic container having a reclosable fastener
An apparatus for producing a plastic container having occludable closure strips comprises a source for the closure strips, a rotatable casting cylinder having a pair of spaced apart circumferential grooves defined therein, a mechanism for advancing the cl...
12/22/1981
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