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4486365 |
Process and apparatus for the preparation of electret filaments, textile fibers and similar articles
A method for the production of electret filaments or fibers from high molecular weight substances is described which consists of melting the substances and extruding them through die orifices,...
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4427609 |
Process for producing piezoelectric polymer films
The invention relates to piezoelectric polymer films. The invention relates to a production process consisting of stretching a polymer material blank by rolling under an electrical field between...
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RE31285 |
Method for manufacturing a filter of electrically charged electret fiber material and electret filters obtained according to said method
A method for forming a filter of electrically charged electret fiber material, consisting of a high molecular weight, nonpolar polymeric substance, comprising drawing, charging, and fibrillating a...
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4358416 |
Apparatus and process for cooling and solidifying molten material being electromagnetically cast
An apparatus and process is provided for electromagnetically casting molten material into a desired shape. A containment zone is established. The containment zone has a first section for...
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4344901 |
Method of making tool handle
An elongated tool handle has a solid wood shaft member and a molded, tool holding section molded directly to the wood at the tool end portion of the shaft member. The tool holding section is...
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4323525 |
Electrostatic spinning of tubular products
A process for electrostatically spinning fiber forming material. The spun fiber is collected on a removable sheath on a rotating mandrel. The sheath is electroconductive. The tubular spun fiber...
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4309368 |
Electrostatic pinning of extruded thermoplastic film
Apparatus and process for the extrusion and quenching of thermoplastics films wherein the film is electrostatically pinned to a cooled quenching surface by means of a blade electrode having a...
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4308223 |
Method for producing electret fibers for enhancement of submicron aerosol filtration
A method is provided for imparting a permanent electrostatic charge to polymeric fibers. Ions are implanted into the fibers in the presence of a strong electric field while the temperature is...
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4255365 |
Pneumatic gauge adjustment of edge-pinned cast web
A process for promoting uniform thickness in cast webs of thermoplastic material comprising use of variable air forces selectively directed toward a cast web with pinned edges along the line of...
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4244894 |
Process and apparatus for the manufacture of films by electrostatic application
Process and apparatus for electrostatically pinning a dielectric film to a moving surface which is electrically conducting and connected to a grounded fixed potential comprising a corona wire fed...
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4236954 |
Label applicator
A label applicator for an injection moulding machine which includes a suction head for picking up a label, an electrostatic charging device to electrostatically charge the label and means to...
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4230650 |
Process for the manufacture of a plurality of filaments
A method and apparatus for making filaments and a fibrous product of randomly overlying filaments in a mat configuration bonded to each other at areas of intersection. The filaments are formed by...
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4208366 |
Process for preparing a nonwoven web
A process and apparatus for forming a non-woven web in which a bundle of untwisted filaments are charged upstream of a pair of elastomer-covered counter rotating squeeze rolls and propelled through...
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4166089 |
Corona free pinning of extruded polymer film
The adhesion or pinning of an extruded film forming polymer to a moving quenching member is improved, in the absence of corona discharge, by maintaining the quenching member at an electrical...
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4157236 |
Electrostatic dry former
A method and apparatus for dry forming a paper, or other nonwoven web, from fibers or fiber flocs. The flocs or bundles are exposed to an oscillating electrostatic field, the resultant mechanical...
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4148851 |
Process for producing thermoplastic polymer sheets
A process for producing a thermoplastic polymer sheet, especially that of polyethylene terephthalate, which comprises extruding a molten thermoplastic polymer through an extrusion die in the form...
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4127706 |
Porous fluoropolymeric fibrous sheet and method of manufacture
A method of preparing a porous sheet product which comprises the step of introducing a spinning liquid comprising an organic fibre forming polymeric material into an electric field whereby fibres...
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4102954 |
Casting of PPS film
Films of poly(arylene sulfide) polymers are produced by applying a layer of an arylene sulfide polymer resin on a metal substrate, with a metal oxide release agent interposed between the substrate...
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4071589 |
Quenching of polymeric film
In the electrostatic pinning of molten polymeric film, especially polyethylene terephthalate film, to a quenching drum, the insulators for those parts of the pinning electrode positioned outside...
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4061702 |
Method of making a plastic container
The method of coating a form such as a core or mold to make a thin walled thermoplastic container shell wherein excess plastic is provided in the wall of the shell where required in a predetermined...
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RE29370 |
Thermoplastic film production
In a process for extruding thermoplastic film means are provided for maintaining substantially free from deposit a wire electrode which is used to deposit an electrostatic charge on to the upper...
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3943212 |
Method for sinter molding plastic articles
Molding is performed by directing streams of comminuted plastic material against surfaces of a heated form or mold, while repeatedly sweeping the form or mold across the streams, progressively...
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3931376 |
Method for rolling out a bar-shaped pre-molding of ceramic material to form a plate
A rolling apparatus for ceramic material comprises a smooth upper roll and rough lower roll for rolling a bar-shaped premolding out into a plate. The premolding is arranged to become attached to...
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3904725 |
Quenching molten thermoplastic film
In the casting of molten thermoplastic film onto a moving quenching surface and pinning the edges of the film to the quenching surface an improvement is realized by applying additional pinning...
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3898026 |
Apparatus for randomizing thicker and thinner areas in the production of film webs
This invention relates to an apparatus for the production of a web of film material, wherein as the molten film material leaves the die it is given an electrostatic charge, the electrostatic charge...
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3691264 |
PROCESS FOR PRODUCING STABLE ELECTRET CONSISTING OF A CRYSTALLINE HIGH MOLECULAR WEIGHT MATERIAL
A process for producing a crystalline high molecular weight material electret which comprises melting and molding a crystalline high molecular weight material, quenching said high molecular weight...
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3686374 |
GAS ASSISTED ELECTROSTATIC PINNING
In the electrostatic pinning of dielectric film onto a moving surface, the improvement comprising surrounding the electrostatic source with a gas in which a specific minimum current can be generated.
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3655307 |
ELECTROSTATIC PINNING OF DIELECTRIC FILM
Apparatus for electrostatically pinning a moving dielectric web to a roll which comprises a first electrode and a second, insulated electrode independent of the roll, and means for establishing a...
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3626041 |
APPARATUS AND PROCESS FOR MAKING CONTINUOUS FILAMENT
A process for making a continuous filament from discrete particulate matter including particles and fibers and mixtures thereof which may be initially packed and oriented in any random fashion. The...
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3607998 |
METHOD FOR PRODUCING HOLLOW ARTICLES
A generally hollow article is produced by coating a flexible bladder with material, integrating the material into a unitary structure, and thereafter removing the bladder therefrom. The apparatus...
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3556514 |
METHOD AND APPARATUS FOR MANIPULATING LABELS OR THE LIKE
Printed labels which are to be introduced into the cavity of a mold for synthetic plastic material are applied to the peripheral surface of a hollow cylindrical transfer member in response to...
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3520959 |
PROCESS FOR ELECTROSTATICALLY PINNING EXTRUDED THERMOPLASTIC FILM
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3507938 |
METHOD FOR PRODUCING SHAPED ARTICLES OF HARDENED SYNTHETIC RESIN HAVING A PIGMENT PATTERN INCORPORATED THEREIN
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3498865 |
METHOD OF COATING PAPER
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3475198 |
METHOD AND APPARATUS FOR APPLYING A BINDER MATERIAL TO A PREARRANGED WEB OF UNBOUND,NON-WOVEN FIBERS BY ELECTROSTATIC ATTRACTION
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3456156 |
APPARATUS FOR APPLYING AN ELECTROSTATIC CHARGE TO FIBROUS MATERIAL
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3436442 |
PROCESS AND APPARATUS FOR MANUFACTURING FLOCKED FABRIC
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3427686 |
METHOD AND APPARATUS FOR QUENCHING POLYMERIC FILMS
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3414444 |
Method of making a parallel fiberweb
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3409537 |
Apparatus for treating polymeric film in an electrostatic field having an adjustable electrode
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3402227 |
Process for preparation of nonwoven webs
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3402239 |
Process for latex dipping
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3399252 |
Method and apparatus for manufacture of high strength and high modulus carbon filaments
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3387326 |
Apparatus for charging and spreading a web
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3374500 |
Apparatus for making thin wall foamed polymeric articles
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3341394 |
Sheets of randomly distributed continuous filaments
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3341637 |
Supporting of electric cables whilst travelling in the direction of their length
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3338992 |
Process for forming non-woven filamentary structures from fiber-forming synthetic organic polymers
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3334161 |
Filament forwarding jet device
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3324508 |
Apparatus for positioning a label in a mold
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