US3781150A - Apparatus for producing multilayer fibrous structures - Google Patents

Apparatus for producing multilayer fibrous structures Download PDF

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Publication number
US3781150A
US3781150A US00262185A US3781150DA US3781150A US 3781150 A US3781150 A US 3781150A US 00262185 A US00262185 A US 00262185A US 3781150D A US3781150D A US 3781150DA US 3781150 A US3781150 A US 3781150A
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United States
Prior art keywords
fibers
casing
short
wall
fiber
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US00262185A
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English (en)
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H Matsumura
T Samejima
H Orito
H Ochiari
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Honshu Paper Co Ltd
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Honshu Paper Co Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D21H15/06—Long fibres, i.e. fibres exceeding the upper length limit of conventional paper-making fibres; Filaments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/26—Special paper or cardboard manufactured by dry method; Apparatus or processes for forming webs by dry method from mainly short-fibre or particle material, e.g. paper pulp
    • D21H5/2607—Pretreatment and individualisation of the fibres, formation of the mixture fibres-gas and laying the fibres on a forming surface
    • D21H5/2628—Formation of a product from several constituents, e.g. blends of various types of fibres, fillers and/or binders or formation from various sources and/or streams or fibres
    • D21H5/2642—Formation of a product from several constituents, e.g. blends of various types of fibres, fillers and/or binders or formation from various sources and/or streams or fibres forming a final non-homogeneous product

Definitions

  • ABSTRACT Apparatus for producing multilayer fibrous mats which can mix and form alternate short and long fiber layers continuously in a single stage of process, both layers being held together by interfiber bonds at their interfaces under the influence of suction air.
  • the apparatus is comprised of a disintegrator unit producing a short fiber layer and a defibrator unit operatively associated therewith for producing a long fiber layer, both units designed to deposit the respective fibers on a conveyor moving above suction boxes.
  • This invention relates to apparatus for producing fibrous structures, more particularly to an improved apparatus for producing a multilayer mat or felt from combination short and long length fiber materials for use as sanitary products such as diapers, nursing pads and the like.
  • short-length fibers as used herein includes typically woodpulp fibers having an average fiber length of 2-5 mm, while the term long-length fibers designates chemical or synthetic fibers of an average length of about 20-50 mm such as rayon, vinylon, nylon, polyester, polypropylene and acrylic fibers, and also indluding cotton.
  • woodpulp fibers have been found to be an advantageous material for most sanitary products from the points of view of their relatively low price, their adequate moisture absorptivity and their bulkiness.
  • woodpulp fibers are burdened by lack of strength due to their short fiber-length and their weakness is pronounced when they become wet in use. Therefore, sanitary products such as diapers and nursing pads made of woodpulp fibers are usually reinforced by suitable long fiber layers.
  • woodpulp fibers short' in fiber-length tend to give rough, uncomfortable feel to the skin of the wearer.
  • a more specific object of the invention is to provide an apparatus for forming a short fiber layer and a long fiber layer or layers simultaneously in a single stage of process both layers being held together by interfiber bonds at their interfaces, and thus producing a multilayer mat product with a maximum of yield and high economy.
  • a relatively thin multilayer mat is made available by holding the long fiber layer to a weight of less than grams per square meter.
  • FIG. 1 is a schematic illustration of the genera] arrangement of a mat forming apparatus embodying the present invention
  • FIG. 2 is an enlarged cross-sectional view of the important operating parts of the apparatus of the invention
  • FIG. 3 is an enlarged plan view of a disintegrator elementor blade runner employed in accordance with the invention and shown as operatively associated with a separating wall;
  • FIG. 4 is an enlarged fragmentary plan view of a separating wall employed in accordance with the invention.
  • FIG. 5 is a partly longitudinally sectional view of FIG. 2.
  • FIGS. 1 and 2 Designated at the reference numeral 10 in FIGS. 1 and 2 is a duct for delivering undispersed pulp fibers from a shredding unit (not shown) to a disintegrator unit generally designated at 100.
  • the duct 10 flares widthwise in the vicinity of an inlet 11 substantially to full width of a perforated separating wall later described, and is connected to this wall as shown in FIG. 2.
  • the disintegrator unit 100 is designed to produce finely separated short-length fibers f of wood pulp and is essentially comprised of a plurality of disintegrating elements or blade runners 101 operatively associated with an elongate cylindrical separating wall 102 hereinafter described.
  • a preferred form of blade runner 101 as better shown in FIG. 3 has an annular core portion 103 defining a circular hole 104 for insertion through a horizontally mounted rotary shaft 1 l0 and two triang ular blade portions 105 extending symmetrically on opposite sides of the core 103.
  • Each blade runner 101 should be relatively thin, or about 1 5 millimeters thick, preferably 3 millimeters thick.
  • the triangular portion 105 in particular should be as light in weight and tapered off as sharply as strengthwise tolerable with a view to maintaining a high critical number of revolutions for a relatively long shaft or rotor on which the blade runners are mounted.
  • a light metal such as aluminum may be advantageously used for these blade runners 101.
  • punched-out holes 140 To further reduce the weight of the blade runner, there are provided therein punched-out holes 140.
  • the blade runner 101 should be flat and rectilinear in its entire plane so as to minimize the resistance to air during its rotation within a dispersing chamber 114. Blade runners with curved or otherwise distorted plane are prone to produce a fan action in the air stream which would lead to the formation of undesirable fiber clots or nodules as experienced with the conventional paddle or brush type disintegrators and consequently to imperfections in a finished mat.
  • blade runners 101 are superimposed one upon another axially at random angles substantially to full length of the separating wall 102 and are thus fixedly mounted on the rotary shaft or rotor 110.
  • the blade runners 101 should be stacked one upon another with their triangular portions 105 oriented in random directions, not in such alter nately uniform angular relation as will form a spiral arrangement or a screwthread contour which would tend to align the air stream in an axial direction and swerve the fibers towards an end of the wall 102.
  • the rotor l 10 is driven by a motor (not shown) at a high speed commensurate for example with a yield of 40 grams per square meter of fibrous mat deposited on a 2,600 millimeters wide depositing wire conveyor, later described, travelling at 300 meters per minute.
  • the speed of the rotor 110, hence of blade runners 101, may be further regulated so as to obtain yields in the range of from 20 to 200 grams per square meter at a travel speed of lOO 300 meters per minute of the depositing conveyor.
  • the elongated cylindrical separating wall 102 is preferably 1.5 3 millimeters thick and is provided with foramens or openings 112 uniformly distributed substantially over its entire circumferential areas except an inlet portion through which untreated fibers are fed.
  • the separating wall being thus provided with a maximum of operating areas will advantageously permit of a rate of fiber sepsration and distribution far greater than ever achieved by any prior-art devices.
  • the openings 112 are preferably 3 5 millimeters in diameter, most preferably 4.5 millimeters in diameter and spaced by a distance S of preferably 4.5 7 millimeters, most preferably 6.5 millimeters.
  • the total area of openings 1 12 or their occupancy in the separating wall 102 is preferably in the range of 30 50 percent. Greater foraminous area would fail to sift separated fibers through the wall and would allow undispersed fiber flocks to escape therethrough. Conversely, smaller foraminous area would prevent separated fibers from passing through the wall.
  • the sifting operation of the wall 102 is related to the peripheral speed of the blade runners 101 and to the diameter of the openings 112. For the above-specified diameters of openings 112, the peripheral speed of the blade runners 101 should be preferably 60 80 meters per second. Lower peripheral speeds would give very little sifting action and allow fiber flocks to slip out through the openings 112. Conversely, higher peripheral speeds would invite increased fan action.
  • the separating wall 102 is elongated to be about 2,000 millimeters long according to one illustrated embodiment of the invention and should importantly be devoid of any interposed ribs or supports because these supports tend to disturb the fiber-carrying air stream and cause flock formation.
  • the blade runners 101 have their tips disposed in close proximity to the inner face of the separating wall 102, and the manner in which they cooperate with this separating wall is illustrated in FIG. 3, from which it will be understood that a breathing action takes place in the air current moving circumferentially closely along the inner face of the separating wall as each blade runner rotates in close approach to the wall.
  • a circumferential movement of each blade runner in a counterclockwise direction develops a positive pressure at the region (a) forward of the runner and a negative pressure at the region (1;) rearward of the runner, with the results that the openings 112 at the region (a) exhale the air which entrains dispersed fibers immediately upon separation and moves them out through the openings of the wall, while the air current at the region (b) is inhaled and directed inwardly towards the blade runners.
  • This breathing action of the openings 112 serves to eliminate the tendency of fibers being entrapped and plugging up the openings.
  • Designated at 113 is an outer casing surrounding the separating wall 102 and defining therewith an annular dispersing chamber 114 in which separated fibers are dispersed in controlled volumes of air.
  • the casing 113 is provided with an elongate slit or aperture 115 communicating with the atmosphere and extending axially on opposite sides thereof. This aperture is provided for maintaining a constant supply of atmospheric air with which to militate against the tendency of dispersed fibers being collected and flocked at the lower portions of the inner wall of the casing 113.
  • air intakes 1 16 and dampers 117, 117 associated therewith for introducing such volumes of air as are required to maintain a desired volumetric ratio of air to fibers and at the same time providing an air current to sweep the fibers ofi" the upper portions of the inner wall of the casing 113.
  • the dispersed fibers screened through the separating wall 102 are thus prevented from flocking together in the dispersing chamber 114 by these sweeping air layers established along the inner wall of the casing 113.
  • the diameter of this casing is greater progressively towards a fibers outlet 118 so as to maintain a constant velocity of air throughout all regions of the chamber 114.
  • the dampers 117' on the side of the casing where the air flows in a direction reverse to the rotation of the blade runners 101 should be held open wider than those dampers 1 17 positioned where the air flows in a direction forward to the rotation of the blade runners.
  • the casing 113 including both ends thereof is advantageously made of a transparent or translucent synthetic resin such as for example vinyl chloride and acrylic resins.
  • the casing being transparent can be utilized to advantage for inspecting the conditions of fiber-entraining air currents within the dispersing chamber 114 so as to readily adjust the dampers 117, 117' as desired.
  • Another important advantage of the casing being made of the above exemplified plastic materials is that it has a mirror-like smooth contact surface which does not reach the dew point as easily as does any metal and can be charged equipotentially with separated fibers sifted from the wall 102 so that the fibers are prevented from being statically collected at the inner wall of the casing 113.
  • the casing 113 is provided with a downwardly directed outlet or deposit opening 118 elongated substantially to full length of the casing for depositing dispersed, separated fibers therethrough onto a moving endless wire conveyor 119.
  • a defibrator unit for producing long fibers f which unit is operatively associated with and extending to substantially full operating length of the disintegrator unit 100.
  • the defibrator unit 150 is comprised of a funnel 151 constituted by an inner wall 152 and an outer wall 153 and communicating with the fibers outlet 118 for disintegrated short fibers f,
  • the inner wall 152 of the funnel 151 is joined with the lower section of the casing 113 and has its upper edge disposed in close approach to a defibrator roll 154 having wound thereon a saw-toothed metallic wire 155.
  • a plate member commonly known as a dish plate 156 having one edge disposed in coacting relation to the toothed wire 155 for defibrating a longfiber forming lap 157 which is advanced by a feed roller 158.
  • the lap 157 is fed against and caught between the wire 155 and plate 156 and combed by the wire 155 into finely separated individual fibers f of long length in contrast to short fibers f, produced by the disintegrator unit 100.
  • the thus separated long fibers f flow downwardly through the funnel 151 and deposit themselves on the moving conveyor 119 to form a first outer layer thereon.
  • the conveyor 119 further advances in the direction of the arrow past an outlet 118 of long fibers f it receives disintegrated short fibers f deposited as a second or center layer on the previously formed first long fiber layer.
  • suction produced by a suction box 120 the disintegrated short fibers f tend to grip and form an interfiber bond with the long fibers f thereby eliminating the necessity of applying any adhesives.
  • an additional defibrator unit in a symmetrical position for forming a third long fiber layer over the second or center shortvfiber layer.
  • the center layer may be sandwiched between the first and third layers, if desired.
  • Designated at 120 is a main suction box opening to full dimension of the outlet 118 and situated a predetermined distance apart from the bottom of the separating wall 102.
  • the distance (h) between the lowermost end of the separating wall 102 and the depositing surface of the wire conveyor 119 on the suction plane of the main suction box 120 should be in the range of from 150 to 300 millimeters. Smaller distance will communicate the wind produced by rotating blade runners 101 to a mat forming plane of the wire conveyor and mar the mat formation. Conversely, greater distance will cause large eddy currents tending to deteriorate the surface finish of the resulting mat.
  • auxiliary suction box 124 Annexed with the main suction box 120 at a position upstream of the run of the wire conveyor is an auxiliary suction box 124 which is adapted to maintain a suction air current thereat to eliminate the tendency of the formed mat being disturbed by a draught of air occurring immediately upon departure of the wire conveyor from the system.
  • the fibrous mat or felt deposited in a multilayer form on the wire conveyor 119 is transferred as by a suction pickup roll onto a further processing stage where the mat is finished in the known manner.
  • FIG. 2 illustrates a preferred form of such finishing stage wherein the multilayer or composite short and long fiber layer mat is transported on an endless conveyor 131 and introduced into a first adhesive applying unit 132 for receiving atomized adhesive on one surface of the mat.
  • the mat is then passed through a first drying section 133 to dry and set the adhesive, and thereafter, the direction of travel of the mat is oriented as by a suction roller 134 so that the other or uncoated surface of the mat is exposed for receiving atomized adhesive at the second adhesive applying unit 135.
  • the mat is thus processed similarly through the second drying section 136, and then is finally taken up on a mat roll 137.
  • Apparatus for producing multilayer fibrous mats which comprises an elongate cylindrical separating wall having sifting openings uniformly distributed substantially over its entire circumferential areas, a rotary shaft joumalled in said wall, a disintegrating means rotatably mounted on said shaft and operatively associated with said separating wall for disintegrating undispersed short-length fiber flocks of woodpulp fibers into finely dispersed elementary fibers, a casing disposed in surrounding relation to said separating wall and defining therewith an annular dispersing chamber having a downwardly directed fiber outlet for dispersed fibers, said casing flaring progressively towards said fiber outlet and being provided in opposite sides thereof with an elongate aperture communicating with the atmosphere for introducing a controlled volume of air into said chamber, a damper provided at the upper end of said dispersing chamber for regulating the volumetric ratio of air to fibers within said chamber, a moving endless wire conveyor underlying said fiber outlet 'for the deposition thereon of dispersed fibers, and defibration means

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US00262185A 1971-12-29 1972-06-13 Apparatus for producing multilayer fibrous structures Expired - Lifetime US3781150A (en)

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JP47001229A JPS5030752B2 (enrdf_load_stackoverflow) 1971-12-29 1971-12-29

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US00262185A Expired - Lifetime US3781150A (en) 1971-12-29 1972-06-13 Apparatus for producing multilayer fibrous structures
US05/427,145 Expired - Lifetime US3984898A (en) 1971-12-29 1973-12-21 Multilayer fibrous structures

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US (2) US3781150A (enrdf_load_stackoverflow)
JP (1) JPS5030752B2 (enrdf_load_stackoverflow)
CA (1) CA946573A (enrdf_load_stackoverflow)
DE (1) DE2248354C3 (enrdf_load_stackoverflow)
FR (1) FR2165843B1 (enrdf_load_stackoverflow)
GB (1) GB1395924A (enrdf_load_stackoverflow)
IT (1) IT975024B (enrdf_load_stackoverflow)
SE (1) SE387376B (enrdf_load_stackoverflow)

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US3943605A (en) * 1974-05-16 1976-03-16 Paper Converting Machine Company Fluff article and method and apparatus for forming same
US3966858A (en) * 1974-01-25 1976-06-29 Union Carbide Corporation Linear apparatus and method for high speed production of air-laid non-woven webs
US3984898A (en) * 1971-12-29 1976-10-12 Honshu Paper Company, Ltd. Multilayer fibrous structures
US4268340A (en) * 1973-08-05 1981-05-19 Colgate-Palmolive Company Method of forming an absorbent article
WO1981002031A1 (en) * 1980-01-18 1981-07-23 Scan Web Is A system for dry forming of paper or other sheet material of particles or fibres
US4767586A (en) * 1986-01-13 1988-08-30 Kimberly-Clark Corporation Apparatus and method for forming a multicomponent integral laid fibrous web with discrete homogeneous compositional zones, and fibrous web produced thereby
US4839943A (en) * 1986-12-24 1989-06-20 Trutzschler Gmbh & Co. Kg Apparatus for detecting foreign bodies in a fiber tuft mass
US4971742A (en) * 1989-05-12 1990-11-20 General Motors Corporation Method and apparatus for forming a highly isotropic web structure
US5281207A (en) * 1991-02-26 1994-01-25 Paragon Trade Brands, Inc. Absorbent product
US20040091401A1 (en) * 2000-04-03 2004-05-13 Golabek Robert S. Self-aligning blood collection tube with encoded information
CN108468244A (zh) * 2018-06-11 2018-08-31 玖龙纸业（太仓）有限公司 一种提高面层纸浆洁净度的净化系统及其净化方法
US20220056642A1 (en) * 2020-08-20 2022-02-24 Seiko Epson Corporation Fibrous body manufacturing method and fibrous body manufacturing apparatus

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US4389175A (en) * 1981-05-15 1983-06-21 James River-Dixie/Northern, Inc. Apparatus for distributing dry fibers onto a forming wire
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US4908175A (en) * 1986-05-28 1990-03-13 The Procter & Gamble Company Apparatus for and methods of forming airlaid fibrous webs having a multiplicity of components
US5097574A (en) * 1990-04-25 1992-03-24 Paper Coverting Machine Company Method and apparatus for forming fluff pads for diapers and the like
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US20040157524A1 (en) * 2003-02-06 2004-08-12 The Procter & Gamble Company Fibrous structure comprising cellulosic and synthetic fibers
JP4901433B2 (ja) * 2006-03-23 2012-03-21 花王株式会社 吸収体及びその製造方法
US7886411B2 (en) * 2007-07-06 2011-02-15 Jezzi Arrigo D Apparatus for the uniform distribution of fibers in an air stream
US8122570B2 (en) * 2007-07-06 2012-02-28 Jezzi Arrigo D Apparatus and method for dry forming a uniform non-woven fibrous web
DE102013210934A1 (de) * 2013-06-12 2014-12-18 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Herstellen eines Faserverbundbauteils sowie Faserverbundbauteil
US9051693B1 (en) * 2014-01-30 2015-06-09 The Procter & Gamble Company Process for manufacturing absorbent sanitary paper products
EP3348691B1 (en) * 2015-09-11 2020-05-20 Seiko Epson Corporation Sheet production device and sheet production method
JP7167671B2 (ja) 2018-11-30 2022-11-09 セイコーエプソン株式会社 繊維材料堆積装置およびシート製造装置
JP7172518B2 (ja) 2018-11-30 2022-11-16 セイコーエプソン株式会社 繊維体堆積装置およびシート製造装置

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JPS5030752B2 (enrdf_load_stackoverflow) * 1971-12-29 1975-10-03

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984898A (en) * 1971-12-29 1976-10-12 Honshu Paper Company, Ltd. Multilayer fibrous structures
US4268340A (en) * 1973-08-05 1981-05-19 Colgate-Palmolive Company Method of forming an absorbent article
US3966858A (en) * 1974-01-25 1976-06-29 Union Carbide Corporation Linear apparatus and method for high speed production of air-laid non-woven webs
US3943605A (en) * 1974-05-16 1976-03-16 Paper Converting Machine Company Fluff article and method and apparatus for forming same
WO1981002031A1 (en) * 1980-01-18 1981-07-23 Scan Web Is A system for dry forming of paper or other sheet material of particles or fibres
US4767586A (en) * 1986-01-13 1988-08-30 Kimberly-Clark Corporation Apparatus and method for forming a multicomponent integral laid fibrous web with discrete homogeneous compositional zones, and fibrous web produced thereby
US4839943A (en) * 1986-12-24 1989-06-20 Trutzschler Gmbh & Co. Kg Apparatus for detecting foreign bodies in a fiber tuft mass
US4971742A (en) * 1989-05-12 1990-11-20 General Motors Corporation Method and apparatus for forming a highly isotropic web structure
US5281207A (en) * 1991-02-26 1994-01-25 Paragon Trade Brands, Inc. Absorbent product
US20040091401A1 (en) * 2000-04-03 2004-05-13 Golabek Robert S. Self-aligning blood collection tube with encoded information
CN108468244A (zh) * 2018-06-11 2018-08-31 玖龙纸业（太仓）有限公司 一种提高面层纸浆洁净度的净化系统及其净化方法
US20220056642A1 (en) * 2020-08-20 2022-02-24 Seiko Epson Corporation Fibrous body manufacturing method and fibrous body manufacturing apparatus
US11802377B2 (en) * 2020-08-20 2023-10-31 Seiko Epson Corporation Fibrous body manufacturing method and fibrous body manufacturing apparatus

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DE2248354C3 (de) 1979-09-27
SE7207708L (enrdf_load_stackoverflow) 1973-07-02
FR2165843B1 (enrdf_load_stackoverflow) 1974-12-27
FR2165843A1 (enrdf_load_stackoverflow) 1973-08-10
DE2248354A1 (de) 1973-08-02
JPS4872474A (enrdf_load_stackoverflow) 1973-09-29
GB1395924A (en) 1975-05-29
JPS5030752B2 (enrdf_load_stackoverflow) 1975-10-03
SE387376B (sv) 1976-09-06
DE2248354B2 (enrdf_load_stackoverflow) 1979-02-08
CA946573A (en) 1974-05-07
IT975024B (it) 1974-07-20
US3984898A (en) 1976-10-12

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