US2954036A - Cellulosic sheet and filter, and process therefor - Google Patents

Cellulosic sheet and filter, and process therefor Download PDF

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Publication number
US2954036A
US2954036A US739513A US73951358A US2954036A US 2954036 A US2954036 A US 2954036A US 739513 A US739513 A US 739513A US 73951358 A US73951358 A US 73951358A US 2954036 A US2954036 A US 2954036A
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United States
Prior art keywords
filter
strip
paper
grooved
flattened
Prior art date
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Expired - Lifetime
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US739513A
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English (en)
Inventor
Milton O Schur
James C Rickards
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olin Corp
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Olin Corp
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24972641&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US2954036(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Olin Corp filed Critical Olin Corp
Priority to US739513A priority Critical patent/US2954036A/en
Priority to GB17766/59A priority patent/GB869846A/en
Priority to DEO6797A priority patent/DE1198264B/de
Priority to CH7392159A priority patent/CH376829A/de
Priority to FR796504A priority patent/FR1226268A/fr
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Publication of US2954036A publication Critical patent/US2954036A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1008—Longitudinal bending
    • Y10T156/101—Prior to or during assembly with additional lamina
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1025—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact

Definitions

  • the main object of this invention has been to provide novel products, and processes therefor, adapted for the consistent production on a large scale of excellent filters for tobacco smoke characterized by high efficiency of removal of particulate matter without high resistance to gas flow.
  • Another object has been the provision of an elongated cellulosic strip which is readily adapted for conversion to improved filter rods and tips. Further objects have included the provision of novel processes as well as additional features which will be apparent from the following description.
  • a preferred embodiment of suitable apparatus is represented diagrammatically in Fig. 1.
  • Starting cellulosic strip 1 is fed from supply reel 2, and after being moistened, if necessary, by means of water spray 3, the strip passes through grooving or fiuting'rolls 4 and 5.
  • rolls 4 and 5 are mating rolls of steel or other suitable metal and are provided with a plurality of parallel circumferential grooves.
  • Fig. 2 which is an enlarged fragmentary sectional view along plane 22 of Fig. l
  • the circumferential grooves 6 of roll 4 mate with the intervening annular projections 7 of roll 5, while the raised rings 7 of roll 4 penetrate the grooves 6 of roll 5.
  • the spacing between the rolls is maintained to produce the desired quality of sheet product, in any convenient manner, for example by connited States Patent 0 Patented Sept. 27, 1960 trolling the relative positions of the roll shaft bearings.
  • the sheet 1 is held between the complementary grooves ing of the fibers and ruptures of the sheet occur mainly at the paper surface areas contacting the grooves 6.
  • Such areas of the grooved paper referred to hereinafter as outer ridge surfaces, are fuzzy, being provided with large numbers of projecting fiber ends.
  • the grooved paper strip is then passed through a dryer 8, where any excess moisture is removed from the sheet by circulating heated gas or by other suitable means as by infra-red lamps.
  • the grooved and dried strip, containing the desired amount of moisture, is then compressed by passage through the nip of smooth-surfaced pinch rolls 9, made of steel or other metal.
  • the compressed grooved strip 10 may then be wound to form bobbins 11 by means of conventional spooling equipment.
  • the conversion of strip 10 to filter rod may conveniently be effected by means of the apparatus shown diagrammatically in Fig. 3.
  • Strip 10 from bobbin 11 is fed together with conventional cigarette wrapper paper 12, taken from bobbin 13, on theendless belt 14, passing over rolls 15, through the forming cone 16, as conventionally used in the assembly of cigarette rods.
  • the strip 10 is laterally gathered and formed under radial compression into a substantially cylindrical consolidated filter rod and is encircled by wrapper paper 12.
  • Paste is applied to the upstanding edge 17 of wrapper 12 by applicator 18, the pasted edge 17 then being pressed into firm contact with the portion of the wrapper which it overlaps by means ofcylindrical member 19. Wrapped filter rod 20 emerges and may be cut into convenient lengths.
  • the grooved and flattened strip may be consolidated to wrapped filter rod as above described by feeding the. strip into the rod-forming mechanism directly without intermediate spooling.
  • material which is preferred consists of paper made from highly bleached'coniferous kraft wood pulp containing atileast about alpha cellulose, which had been very the paper is much less uniform in formation and strength properties than paper made from well-beaten pulp. When such paper, made from lightly beaten pulp, is stretched, the clotted or clumped fibers tend to pull apart to produce fuzzy or fibrous surfaces.
  • the starting paper web 1 should desirably contain about 10 to 55% by weight of moisture, preferably about 25%, at the grooving step, as deep grooves can then be formed without excessive tearing or shredding of the sheet.
  • paper web I After passing through rolls 4 and 5, the spacing of which is controlled to produce the desired depth of groove, paper web I has a grooved or corrugated strue ture as shown in the enlarged fragmentary sectional view of Fig. 4.
  • the structure may be described as a series of connected ridges, the adjacent ones being faced in opposite directions.
  • the outer surfaces 21 of the ridges are substantially covered by a fuzzy layer of projecting fibers and fiber ends, as contrasted with the inner surfaces 22 of the ridgeswhich have a smooth pressed appearance.
  • the fibrous surface probably results from the stretching and rubbing action on web 1 which is most highly concentrated at the areas of contact between grooves 6 and the paper web.
  • Projecting fibers in the ridge outer surfaces 21 are also in part due to separation of fibers and longitudinal rents which occur most frequently in this portion of the web.
  • the grooved web is passed through pinch rolls 9, which are spaced apart at the proper gap to accomplish the desired compression of the grooved strip. Compression by rolls 9 modify the sheet structure to that shown in the enlarged fragmentary sectional view of Fig. 5.
  • the ridges have been flattened so as to effect a significant increase in the apparent density and, at the same time, to spread the fibrous surfaces 21 laterally, so as to increase substantially the proportion of exposed sheet surface covered by projecting fibers and fiber ends.
  • the fiattening pressure accomplishes a further separation of fibers which was initiated during the groov-- ing operation.
  • the resulting sheet is characterized as having a desirably apparent density, and one whose surface is covered by a multitude of projecting fibers or fiber ends which extend into or across each groove in a haphazard manner, loosely pervading the entire groove.
  • Filters for tobacco smoke prepared from the grooved and flattened web display a combination of desirable properties not heretofore attained with cellulosic filters.
  • Such filters display high efficiency in the reduction of particulate content in tobacco smoke, readily accomplishing the removal by a short length of filter tip of over 50% and up to about 60% of the particulate content in the smoke while retaining high permeability to the longitudinal passage of gas.
  • the filter rods in accordance with this invention likewise display a desirable degree of firmness permitting ease of cutting and handling by high speed automatic machinery, which is essential in the manufacture of cigarettes by modern mass production techniques.
  • the high filtering efiiciency at desirable ranges of resistance to gas flow are attained by the filter tips of this invention without requiring the use of excessive amounts of filtering material.
  • the ends of the filter tips of this invention have an excellent appearance, characterized particularly by uniformity and by the substantial absence of macroscopic pores, reference being had to the substantial absence of pores which are visible to the normal human eye at the usual reading distance of 10 to 15 inches. Generally, substantially no pores of appreciable size are visible even when an end or transverse section is magnified ten times. The uniform structure is also demonstrated by the even staining of the filter tip after a cigarette has been smoked.
  • the advantages of filters made from grooved end flattened paper strip in accordance with this invention are illustrated in the following test data obtained using filter rods 102 mm. long and 8 mm. in diameter.
  • the starting paper in each case consisted of sheets 0.07 mm. thick, made from slightly beaten pulp as above described, paper A containing 1% by weight of melamine-formaldehyde wet strength resin, paper B containing 2% by weight of the above resin, and paper C being free of wet-strength resin.
  • PAPER A INITIAL W'IDTH, 0 INCHES. GROOVED ⁇ VIDTH, 7% INCHES Thickness Filter Column Properties No. Grooved Resist- Filtration Grooved, and Fiat- Density once to softness, Efficimilhtened, (g./ce.) gas flow, millicncy, meter milliinches meter percent meter
  • PAPER B INITIAL WIDTH 9 INCHES. GROOVED WIDTH,
  • PAPER 0 INITIAL WIDTH, 8% INCHES. GROOVED WIDTH, 7 INCHES.
  • the paper thickness was measured to the nearest hundredth of a millimeter as the maximum distance between the two surfaces of the sample when subjected to the full pressure, 7 to 9 pounds per square inch, of an E. J. Cady paper caliper measuring instrument.
  • the rod density values were obtained from measurements of volume and weight of wrapped rod, the weight of wrapper 12 being deducted.
  • Resistance to gas flow measurements represent the pressure drop in inches of water observed in a filter rod 102 mm. long and 8 mm. in diameter at an air flow rate through the rod of 17.5 cubic centimeters per second.
  • the softness values were measured by contacting a horizontally disposed filter rod at the seam of the wrapper with the flat end of a vertical cylindrical bar, one-half inch in diameter and supporting a weight of 347.5 grams, and determining to the nearest hundredth of a millimeter the distance of downward movement of the bar in a period of ten seconds.
  • the softer the filter rod the more resistant to deformation or compression, the higher the measured value of bar travel.
  • Filtration efficiency values represent the percentage decrease in the amount of solids recovered from smoke collected from filter-tip cigarettes as compared with the amount collected from the smoking of an identical column of tobacco not provided with a filter.
  • the cigarettes for test selected to have closely agreeing weights, were 85 mm. long including, in the case of the filter-tip samples, a filter-tip 17 mm. long at one end.
  • the cigarettes were smoked in suitable test apparatus at the rate of one 35 cc. puff of two seconds duration per minute until a 62 mm. column of tobacco had been consumed.
  • the smoke from each cigarette was collected in a glass vessel at room temperature and the solids were allowed to settle.
  • the solids were then transferred by use of a solvent to a tared dish and weighed after evaporation of the solvent, drying in an oven at 95 C. for 16 hours, and cooling in a desiccator.
  • Resistance to gas flow 4 to inches of water, and not over 12 inches.
  • Softness 0.25 to 0.75 mm., and not over 1.0 mm.
  • Filtration efficiency Over 40%, preferably over 50%.
  • filter rods characterized by such low resistance to deformation that the measured values of softness exceed about 1.0 mm., are not well adapted to subdivision and satisfactory handling by automatic machinery operating at the desired high production rates.
  • the preferred treatment of the starting paper web consists in grooving the web to a suitable depth, generally such that the sheet thickness is increased about four to eight times the original thickness andthen flattening to 6 a thickness amounting to about 30% to 65% of the grooved thickness.
  • the grooved and flattened web then has a structure as shown in Fig. 5 wherein longitudinal ridges 21 consist of flattened loops, the adjacent folds having in transverse section an appearance resembling an hour-glass open at one end.
  • the outer ridge surfaces 21 are substantially covered by fiber ends loosened from the starting paper structure by the successive steps of grooving and then flattening.
  • the flattening step also spreads the fiber ends laterally to fill the openings of the flattened loops.
  • the fiber ends forming the fuzzy covering over the outer ridges surfaces 21 have been observed to project an average of about 0.25 mm. from the sheet surface where the fibers remain bonded to each other- .As the average fiber length is the preferred starting paper averages close to 1.25 mm.
  • the projecting fiber ends are held in place by bonds with surrounding fibers for, on the average, about of the length of the entire fiber.
  • the resulting grooved and flattened sheet is characterized by longitudinal folds connected to one another and consisting of flattened loops, the adjacent ones facing in opposite directions and overlapping each other, each loop having an outer ridge surface which is fuzzy with projecting fiber ends.
  • the resulting strip is further characterized by capability of being spooled to form a compact roll having an apparent density of 0.2 to about 0.5 grams per cubic centimeter.
  • Grooved and flattened strip as above described is readily formed, as by means of apparatus such as that shown in Fig. 3, into filter rod of highly desirable properties and of excellent end appearance when out into filter rods and tips.
  • the structure is such as to facilitate the consolidation of the strip by means of forming cone 16 into rod of uniform formation and apparent density throughout and displaying end sections of snow-like appearance and substantially free of macroscopic pores.
  • Desirable softness values of the above rod within the above-stated limits of 0.25 to 0.75, result particularly because of the retention of the parallel portions of the web connecting the adjacent ridges 21 which contribute.
  • the grooved and flattened paper strip of this invention is prepared from paper, as described above, containing about 1% of melamine formaldehyde or other wet-strength resin.
  • Such paper is readily handled, with a minimum of ditliculties, throughout the operations of grooving, drying, flattening and spooling under tension as well as in the steps of consolidating to rod form and further handling thereof.
  • the filter rod and filter tips thus produced are characterized by uniformly excellent appearance and performance.
  • Such desired results are enabled by the novel grooved and flattened strip, in accordance with this invention, characterized by projecting fiber ends substantially uniformly distributed over both surfaces of the strip and anchored thereto.
  • the described filter may include other ingredients such as activated carbon or other adsorbents for smoke constituents, or agents for modifying tobacco smoke constituents, without departing from the spirit and scope of the invention, as defined in the accompanying claims.
  • a filter for tobacco smoke comprising a wrapper and a filling therein, said filling consisting essentially of contacting layers of paper strip material having longitudinally extending connected flattened loops including ridge portions, the adjacent ridges being faced in opposite directions and having a multitude of projecting fiber ends on the outer surface thereof, the adjacent loops partly overlapping each other, and said strip being consolidated to substantially cylindrical form to have an apparent density of about 0.16 to 0.20 gram per cubic centimeter, being readily permeable longitudinally to gases and characterized by end sections substantially free of macroscopic pores.
  • Elongated strip of fibrous cellulosic material particularly adapted for the formation of filters for tobacco smoke, consisting essentially of paper strip having connected ridges extending longitudinally thereof, the adjacent ridges being faced in opposite directions and having a multitude of projecting fiber ends on the outer surface thereof, said strip having been compressed to have an apparent density of about 0.20 to 0.50 gram per cubic centimeter, and-being characterized by the fact that the said adjacent ridges partly overlap each other with each ridge forming part of a flattened loop.
  • Strip in accordance with claim 4 having a thickness prior to compression of about 0.30 to 0.50 mm. and a final thickness of about 20% to 80% of that prior to compression.
  • a grooved and flattened paper sheet provided with substantially parallel grooves including ridge portions, said ridge portions being flattened and having a multitude of fiber ends projecting from the surfaces thereof in haphazard manner, said grooves being about 0.1 to 0.4 mm. in depth and being loosely pervaded by said fiber ends.
  • Process of manufacturing an elongated strip of cellulosic material particularly adapted for the formation of filters for tobacco smoke comprising the steps of grooving paper strip longitudinally while preventing any substantial transverse shrinkage thereof to provide strip having a thickness of about 0.30 to 0.50 mm. and characterized by a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions, and flattening the grooved strip to a thickness of about 20% to of the grooved thickness.
  • Process of manufacturing an elongated rod of cellulosic material adapted for the efficient filtration of tobacco smoke comprising the steps of grooving paper strip longitudinally while preventing any substantial transverse shrinkage thereof to provide a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions and having a multitude of projecting fiber ends on the outer surface thereof, compressing the grooved strip to flatten the said loops so that the adjacent fibrous surfaces partly overlap each other, and consolidating said strip to form a substantially cylindrical rod having an apparent density of about 0.16 to 0.20 gram per cubic centimeter and longitudinally permeable to gases.
  • Process of manufacturing an elongated strip of cellulosic material, particularly adapted for the formation of filters for tobacco smoke comprising the steps of grooving said strip longitudinally while preventing any substantial transverse shrinkage thereof to provide a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions and having a multitude of projecting fibers on the outer surface thereof, and compressing the grooved strip to flatten the said loops so that the adjacent fibrous surfaces partly overlap.
  • a filter for tobacco smoke comprising a wrapper and a filling therein, said filling consisting essentially of contacting layers of paper strip material having generally longitudinally extending connected flattened loops including ridge portions, the adjacent ridges facing in opposite directions and having a multitude of projecting fiber ends on the outer surface thereof, the adjacent loops partly overlapping each other, and said strip being consolidated to red form characterized by an apparent density of about 0.16 to 0.20 gram per cubic centimeter, and by generally longitudinal passageways in said loops and between said layers, most of said passageways being 0.25 to 0.60 millimeter in width and being substantially filled with pro jecting fiber ends.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Paper (AREA)
US739513A 1958-06-03 1958-06-03 Cellulosic sheet and filter, and process therefor Expired - Lifetime US2954036A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US739513A US2954036A (en) 1958-06-03 1958-06-03 Cellulosic sheet and filter, and process therefor
GB17766/59A GB869846A (en) 1958-06-03 1959-05-25 Fibrous cellulosic sheet and filter and process therefor
DEO6797A DE1198264B (de) 1958-06-03 1959-06-02 Streifen zum Herstellen von Filtern fuer Zigaretten od. dgl.
CH7392159A CH376829A (de) 1958-06-03 1959-06-03 Verfahren zur Verarbeitung eines Streifens aus Zellulosematerial zu Filtern, insbesondere für Tabakrauch, und nach diesem Verfahren hergestelltes Filter
FR796504A FR1226268A (fr) 1958-06-03 1959-06-03 Bouts de filtre pour cigarettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US739513A US2954036A (en) 1958-06-03 1958-06-03 Cellulosic sheet and filter, and process therefor

Publications (1)

Publication Number Publication Date
US2954036A true US2954036A (en) 1960-09-27

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US739513A Expired - Lifetime US2954036A (en) 1958-06-03 1958-06-03 Cellulosic sheet and filter, and process therefor

Country Status (5)

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US (1) US2954036A (de)
CH (1) CH376829A (de)
DE (1) DE1198264B (de)
FR (1) FR1226268A (de)
GB (1) GB869846A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383449A (en) * 1964-10-01 1968-05-14 Muller Paul Adolf Method for producing an endless filter string
US3396061A (en) * 1964-06-01 1968-08-06 Celanese Corp Smoke filters
USRE28487E (en) * 1953-08-04 1975-07-22 Crimped flat material for filter plugs
WO1985003454A1 (en) * 1984-02-13 1985-08-15 American Filtrona Corporation Pleated filter and method and apparatus for fabricating same
US5053066A (en) * 1990-05-04 1991-10-01 Hassenboehler Charles B Nonwoven filter and method of manufacture
US5732718A (en) * 1994-08-23 1998-03-31 Schweitzer-Mauduit International, Inc. Selective filtration device
US5814390A (en) * 1995-06-30 1998-09-29 Kimberly-Clark Worldwide, Inc. Creased nonwoven web with stretch and recovery
EP1902634A3 (de) * 2006-09-20 2009-12-23 G.D.S.p.A. Gerät zur Herstellung von Zigarettenfiltern
US10905155B2 (en) 2013-09-02 2021-02-02 Philip Morris Products S.A. Method and apparatus for manufacturing variable crimped web material

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1208535A (en) * 1915-11-12 1916-12-12 Silas M Ford Method of making lath-board.
US2164702A (en) * 1936-02-29 1939-07-04 Davidson Glenn Method and apparatus for making cigarette mouthpieces
US2167170A (en) * 1937-07-01 1939-07-25 Int Cigar Mach Co Tipped cigar and method of forming the same
US2425207A (en) * 1940-02-19 1947-08-05 Cincinnati Ind Inc Creping corrugated papers
US2679887A (en) * 1949-07-22 1954-06-01 Arkell Safety Bag Co Method of making crinkled laminated material
US2849932A (en) * 1955-01-31 1958-09-02 Peter J Schweitzer Inc Method and apparatus for making filter rods

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE615923C (de) * 1934-07-07 1935-07-16 Muller J C & Co Zu einem Mundstueckeinsatz zusammenrollbarer Streifen aus Papier o. dgl. und Vorrichtung zu seiner Herstellung
DE1023386B (de) 1953-04-22 1958-01-23 Papierfabrik Fleischer G M B H Von einem Strang abgeschnittenes Zigarettenrauchfilter aus Kreppapier und Verfahren zu seiner Herstellung
BE530256A (de) * 1953-07-10
BE536367A (de) * 1954-03-16
CH323601A (de) * 1954-09-29 1957-08-15 Zeder Anton Filter, insbesondere für Zigaretten
GB795534A (en) * 1954-10-05 1958-05-28 Olin Mathieson Improvements in or relating to a method and apparatus for making a filter for tobacco smoke
FR1146796A (fr) * 1955-02-15 1957-11-14 Procédé et dispositif pour la fabrication de matière plate crêpée

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1208535A (en) * 1915-11-12 1916-12-12 Silas M Ford Method of making lath-board.
US2164702A (en) * 1936-02-29 1939-07-04 Davidson Glenn Method and apparatus for making cigarette mouthpieces
US2167170A (en) * 1937-07-01 1939-07-25 Int Cigar Mach Co Tipped cigar and method of forming the same
US2425207A (en) * 1940-02-19 1947-08-05 Cincinnati Ind Inc Creping corrugated papers
US2679887A (en) * 1949-07-22 1954-06-01 Arkell Safety Bag Co Method of making crinkled laminated material
US2849932A (en) * 1955-01-31 1958-09-02 Peter J Schweitzer Inc Method and apparatus for making filter rods

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28487E (en) * 1953-08-04 1975-07-22 Crimped flat material for filter plugs
US3396061A (en) * 1964-06-01 1968-08-06 Celanese Corp Smoke filters
US3383449A (en) * 1964-10-01 1968-05-14 Muller Paul Adolf Method for producing an endless filter string
WO1985003454A1 (en) * 1984-02-13 1985-08-15 American Filtrona Corporation Pleated filter and method and apparatus for fabricating same
US4594162A (en) * 1984-02-13 1986-06-10 American Filtrona Corporation Pleated filter and method and apparatus for fabricating same
US5053066A (en) * 1990-05-04 1991-10-01 Hassenboehler Charles B Nonwoven filter and method of manufacture
US5732718A (en) * 1994-08-23 1998-03-31 Schweitzer-Mauduit International, Inc. Selective filtration device
US5814390A (en) * 1995-06-30 1998-09-29 Kimberly-Clark Worldwide, Inc. Creased nonwoven web with stretch and recovery
EP1902634A3 (de) * 2006-09-20 2009-12-23 G.D.S.p.A. Gerät zur Herstellung von Zigarettenfiltern
US10905155B2 (en) 2013-09-02 2021-02-02 Philip Morris Products S.A. Method and apparatus for manufacturing variable crimped web material

Also Published As

Publication number Publication date
FR1226268A (fr) 1960-07-11
DE1198264B (de) 1965-08-05
GB869846A (en) 1961-06-07
CH376829A (de) 1964-04-15

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