Class 493/50 - Filter of fibrous material

Subclass of Class 493 - Manufacturing container or tube from paper; or other manufacturing from a sheet or web
Definition: Method or apparatus comprising forming a filter from material
No. of patents: 35
Last issue date: 01/15/2008

Number	Title	Issue Date
7318797	Continuous rod machine arrangement for producing nonwoven filters The invention relates to a method for producing a nonwoven fiber composite for the manufacture of filters in the tobacco industry, wherein the method feeds separated fiber materials to a fluidized bed and the separated filter material inside the fluidized bed are tr...	01/15/2008
7226404	Cigarette filter assembly machine A cigarette filter assembly machine wherein a rolling unit is defined by a rolling drum and a guide drum coaxial with each other and connected to each other in angularly-fixed, axially-sliding manner; and wherein the rolling drum has a number of suction rollers (...	06/05/2007
7074170	Method and apparatus for making cigarette filters with a centrally located flavored element A filter making apparatus includes a positioning device having a passageway therethrough, with the passageway guiding a continuous flavor element such as a continuous strand of textile material from an inlet of the passageway to an outlet of the passageway. A liquid...	07/11/2006
7004896	Method and arrangement for producing compound filters A method and arrangement are provided for producing compound filters for products in the tobacco-processing industry. A filter tube, having a filter element in a central region of the filter tube, is supplied to a predetermined position. Predetermined portions of fi...	02/28/2006
6783617	Method of densifying streams of filter material for tobacco smoke A filter rod making machine wherein successive increments of a stream constituting a converted tow of filamentary filter material for tobacco smoke are contacted by a compressing tool which is vibrated at a frequency and/or amplitude sufficient to prevent over-heati...	08/31/2004
6537186	Process and apparatus for high-speed filling of composite cigarette filters A process of manufacturing composite filter stock is provided that includes several steps. In a first step, a paper carrier strip feeds along a conveyor. Along one edge of the carrier strip, the paper is folded back against itself. Fibrous filter segments...	03/25/2003
6062228	Biodegradable filter material and method for its manufacture There is provided a biodegradable filter tow or filter material from renewable raw materials for the use as a tobacco smoke filter element of cigarettes, cigars or pipes as well as a method for preparing it, wherein fibers, films or foams prepared in an e...	05/16/2000
6059706	Method of and apparatus for treating a filter tow A tow of fibrous filter material for tobacco smoke is transported lengthwise through a so-called finger which is an elongated channel wherein the cross-sectional area of the tow is gradually reduced to that of the rod-like filler in the wrapper of a filte...	05/09/2000
5725467	Method of and apparatus for making a tow of filter material for tobacco smoke The treatment of a tow of filamentary filter material for tobacco smoke prior to draping of the resulting filler into a web of wrapping material is followed by advancement of the filler in a plane and single or multiple deflection of successive increments...	03/10/1998
5460590	Method and apparatus for producing fiber skeins A method for producing at least one fiber skein for the production of filters for cigarettes and for other smokable rod-shaped articles, comprises the steps of drawing from a supply at least one filter tow strip, supplying the drawn fiber strip to a subse...	10/24/1995
5282779	Air jet for producing filter plug for cigarette An air jet for producing a filter plug for cigarette comprising an imparting portion for propelling force to a tow-like fiber bundle and a beak portion, wherein said imparting portion is constructed by a trumpet (21) having a converged tip end region, a t...	02/01/1994
5063945	Tobacco filter stock A tobacco filter stock capable of being molded into a filter only be entanglement of filaments with one another without any adhesion means, whereby the resulting filter has a suitable hardness and a superior whiteness. A tobacco filter and a production pr...	11/12/1991
4798570	Process for preparing filter rods An improved process for preparing fiber rods useful as cigarette filter tips comprises feeding a synthetic fiber tow through an air jet bulker directly into the garniture of a conventional cigarette filter making apparatus. The process allows production o...	01/17/1989
4697602	Motor driven bulk material roll and wrapping machine A machine for rolling bulk material, such as fiber filters and tobacco, and wrapping a sheet member around the bulk material has a flexible apron connected to a roller bar which is rotated with an electric motor. The apron is located over a convex support...	10/06/1987
4593706	Producing filler material, particularly for cigarette filters Filler material, particularly for cigarette filters, is produced by feeding a stream of substantially continuous fibres of filter material onto a pin roller having a surface carrying sharp projections in the form of pins and the pin roller is driven at a ...	06/10/1986
4583560	Tobacco smoke filter A tobacco smoke filter includes a corrugated tape-like wrapping which, together with an outer perforated or otherwise air-permeable paper, defines a set of longitudinal grooves. Each of the grooves includes a blocking member, so as to inhibit direct smoke...	04/22/1986
4525161	Method for producing tobacco smoke filters A method is disclosed for producing tobacco smoke filters wherein a continuous tube of smoke filtration material is ensheathed in a smoke-pervious layer of fibrous material. The ensheathed tube is cut into discrete lengths and in each of the lengths a cro...	06/25/1985
4522616	Method and apparatus for forming cigarette filter rods The present invention relates to high speed processes and apparatus for the manufacture of cigarette filter rods. In accordance with this invention it has been discovered that in a process of manufacturing filter elements from opened and deregistered crim...	06/11/1985
4514180	Method of making filter for a cigarette product A filter for a cigarette product has a cylindrical filter plug or element surrounded by a filter wrapping material. The overlapping edges of the filter wrap are secured together by a line of adhesive along and between the overlapping edges. The filter wra...	04/30/1985
4508525	Method and apparatus for producing tobacco smoke filter having improved tar/carbon monoxide ratio A method and apparatus for producing tobacco smoke filter having an improved tar/carbon monoxide ratio is disclosed. The filter is obtained by sealing off the center portion of the filter with an inner member which is impermeable to the passage of smoke, ...	04/02/1985
4507107	Filter manufacturing technique Method and apparatus for producing axially elongated, self-sustaining, dimensionally stable smoke rods or the like from filamentary tow by feeding the tow into a confined zone having a non-porous section and a porous section, simultaneously feeding gas un...	03/26/1985
4411641	Method for producing a tobacco smoke filter plug A method and apparatus for producing a tobacco smoke filter having a double structure composed of one inner core phase in a special fibrous arrangement and an outer skin layer in a different fibrous arrangement surrounding the core phase. The tobacco smok...	10/25/1983
4283186	Method of forming cigarette filter material A non-woven cellulose ester fibrous filter sheet material comprising cellulose ester staple fibers and cellulose ester fibrets which exhibits improved filtration properties and the method of its preparation....	08/11/1981
4273600	Bonding fibrillated polypropylene smoke filter with ethylene-vinylacetate emulsion The invention relates to the treatment of fibre, particularly for making rods of bonded, fibrillated polyolefin fibre which can be used for example as or in tobacco smoke filters. The fibres may be crimped or straight and are bonded with a polymeric or co...	06/16/1981
4259130	Production of rod-shape elements A continuous strand consisting of loose filamentary and/or fibrous material is brought into engagement with a conveying and forming belt in at least approximately tension-free condition by means of at least one continuously moving conveying element which ...	03/31/1981
4189511	Filter Improved tobacco smoke filters, particularly cigarette filters, are prepared from a web of synthetic polymeric fibers having applied to at least one surface thereof a film-forming derivative of cellulose. Continuous processes and apparatus for the product...	02/19/1980
4125061	Method for the production of filter structure for cigarette filters The present invention relates to a method for assembling a highly efficient cigarette filter by making a new type of filter structure starting with a sheet of fiber material, this sheet being shaped as a cylindrical casing according to known geometric sha...	11/14/1978
4100845	Method and machine for producing filter elements for tobacco smoke A filter element for use as a mouthpiece for filter cigarettes, cigarillos or cigars has an inner tubular wall with lugs which are bent inwardly from the material of the inner wall, and an outer tubular wall which seals the outer ends of openings which de...	07/18/1978
4085663	Crimper assembly An improved crimper assembly for use in making crimped filter materials is disclosed. The improved features of the assembly include an insulated central heater block which incorporates a steam entrance housing. Also provided are side plate bearing blocks ...	04/25/1978
4075936	Method and apparatus for making tobacco smoke filter Tobacco smoke filters and methods and means for making same wherein the products have both internal and external cavities, with the external cavities being of a limited nature so as to provide a substantially smooth outer surface for attaching conventiona...	02/28/1978
4059043	Method and apparatus for making tobacco smoke filters Tobacco smoke filters and methods and means for making same wherein the products have a composite substantially cylindrical inner member formed from two semi-cylindrical inner elements and overwrapped with a common plug wrap. The composite inner member ha...	11/22/1977
4036119	Method and machine for the production of composite filter mouthpieces Filter mouthpieces with one or more thin filter disks consisting of a first filter material and one or more filter plugs consisting of a second filter material are produced by inserting filter disks between spaced-apart filter plugs which form a single fi...	07/19/1977
4015514	Apparatus for making cigarette filters Apparatus for feeding low density particulate material into spaces between filter plugs secured spacedly to filter wrap provides for fluidizing the material and transferring the fluidized material by suction into such spaces. The filter plugs and wrap are...	04/05/1977
3954051	Apparatus for clipping wrapped rod-like fillers of fibrous material Apparatus for separating the leader of a filter rod or cigarette rod intermediate the wrapping mechanism and the cutoff of a filter rod or cigarette rod making machine has a clipper which is pivotable by a fluid-operated or electric motor so that its blad...	05/04/1976
3943832	Method and apparatus for the handling of tow in the manufacture of tobacco smoke filters containing particulate material A method and apparatus for the handling of tow in the manufacture of filter rods containing particulate material. The process is characterized by feeding a continuous web of filter material, folding the edges of the web beneath the center portion of the w...	03/16/1976

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Class 493/50 - Filter of fibrous material