US3792952A - Sheet forming device - Google Patents

Sheet forming device Download PDF

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Publication number
US3792952A
US3792952A US00251645A US3792952DA US3792952A US 3792952 A US3792952 A US 3792952A US 00251645 A US00251645 A US 00251645A US 3792952D A US3792952D A US 3792952DA US 3792952 A US3792952 A US 3792952A
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United States
Prior art keywords
die elements
elements
die
sheet material
drum
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Expired - Lifetime
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US00251645A
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English (en)
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M Hamon
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/22—Corrugating
    • B29C53/24—Corrugating of plates or sheets
    • B29C53/28—Corrugating of plates or sheets transverse to direction of feed
    • B29C53/285—Corrugating of plates or sheets transverse to direction of feed using rolls or endless bands

Definitions

  • references Cited ing is carried out by at least first and second cooperat- UNITED STATES PATENTS ing dies with means associated with one of the dies for driving the other in synchronous register.
  • the apparax g 2532 tus may also include a third die set which is likewise co 3,350,484 /1967 Magi11,-Jr.
  • the present invention relates to apparatus and installations embodying same for forming surface configurations on sheets or sheet material on rolls and in particular such forming of thermoplastic sheet materials.
  • sheet or sheets means extended surface sheet-like materials in the form of webs delivered from sheet manufacturing apparatus or in the form of rolls or stacks of cut material.
  • Apparatus for forming sheet material into regular or irregular corrugations is known in the art.
  • machines which include a pair of die elements, one comprising a fixed die and the other movable into and out of sheet forming position, thereby operating in the manner of a press between which the sheet to be formed or re-formed is positioned.
  • Such press-like forming apparatus permits accurate register of the opposed die elements; however, the operation of such apparatus is discontinuous in nature thereby reducing the efficiency and militating against high speed operation.
  • the apparatus may be defined as of the type including at least two forming implements or organs driven in synchronism between which passes a sheet to be formed and wherein the die carrying elements are locked with their counterpart die carrying elements over at least a portion of closed ways.
  • the apparatus also includes means which insure synchronous register in the sheel forming zone or area by driving only one of the forming organs or dies and interconnecting the other of the forming organs or dies for drive by the first thereof.
  • each die element is supported by a carrier tray secured to at least one endless chain 'driven in a closed path to present a top run and a bottom run wherein the trays are caused to be located in a contiguous manner with each other during their top run positions and discontiguous and unlocked from each other during their bottom run positions;
  • Apparatus including forming organs which cooperate with the tray carried die elements with the forming organs comprising a plurality of forming slats slidably mounted in the peripheral surface of a rotating drum,
  • each of the trays is provided with a rack which cooperates with a toothed wheel affixed to the drum and through which the drum is caused to rotate in synchronism with the movement of the tray carried rack;
  • the apparatus may also include further sheet forming dies supported by trays secured to endless chains adapted to travel in a closed path having upper and lower runs with the lower run being parallel to and positioned over a portion of the top run of the other tray carried first die elements; and
  • Apparatus including guide means adapted to bring the upper and lower tray carried die elements into op posed register and additional driving means carried by each of the trays to cause the trays to move in meshed synchronism.
  • the invention also relates to sheet forming installations for deforming particularly thermoplastic materials including a feeding stage, at least one heating stage and at least one forming stage wherein each of the at least one forming stages includes the novel apparatus generally defined hereinabove.
  • FIG. 1 is a partially diagramatic view of the overall apparatus comprising the present invention:
  • FIG. 2 is an enlarged fragmentary elevational view with parts broken away, of the pre'forming device
  • FIG. 3 is a still further enlarged detailed sectional view showing the specific operation of the preforming device
  • FIG. 4 is a detailed vertical sectional view taken along the line 44 of FIG. 2;
  • FIG. 5 is an enlarged partial schematic view, showing greater detail of the coordinated mechanisms employed in the forming stage
  • FIG. 6 is a still further enlarged elevational view of the coordinated components in various stages of operation as illustrated in FIG. 5;
  • FIG. 7 is a detailed vertical sectional view taken along the line 7-7 of FIG. 6;
  • FIG. 8 is a perspective view of a pair of die elements shown in FIGS. 1, 5, 6 and 7.
  • Forming apparatus is described as incorporated in a more complicated installation which is shown in FIG. 1 and includes a sheet feeding stage A, a sheet preheating stage B, a sheet preforming stage C, a sheet heating stage D and a final sheet forming stage E.
  • the feeding, preheating and heating stages are generally conventional and will not therefore be described in detail. It is, however, mentioned that the feeding stage includes a roll of thermoplastic material F to be formed and is provided with driving means having automatic unrolling speed regulating means for the roll of sheet material F so as to avoid any risk of accidental web or sheet breakage.
  • the preheating and heating stages B and D they are composed of heating soleplates, the temperature of which may be regulated as and when required.
  • the forming stage itself includes a frame I on which is mounted a first kinematic chain assembly 2.
  • the assembly is driven by motor-reducer or motor-regulator set 3 connected to at least one driving cog-wheel 5a for endless chain 4.
  • the chain 4 is trained about at least one idler wheel 5b.
  • two parallel chains 4 and consequently two pairs of cog-wheels are provided.
  • the pair of chains 4 mount trays 6 which are guided along roller-paths 7 integral with the frame as to be more fully described in reference to FIGS. 4, 7 and 8.
  • Each tray has a plane upper face on which is fixed a die element 8 which, in the illustrated case, has a corrugated form.
  • Each die element 8 may be fixed to its respective tray 6 for instance by screws so as to be easily interchangeable.
  • each tray From the plane upper face, two lateral wings 9 extend downwards and support front guide-rollers 10 and back guide-rollers 11, with the rollers 11 arranged in the back of the tray having a sensibly greater thickness than that of the front rollers 10, and this, for a purpose which will clearly appear hereinafter.
  • the tray driving chains 4 are secured to the trays at the level of the front guide-rollers l0 and about axes l2 coaxial to these rollers. Slightly behind the front rollers 10, each tray has secured thereto, at its upper part, two grooved rollers 13 of V section or type which are intended to cooperate with forks carried by the trays of the forming stage of the apparatus which will be described hereinafter.
  • Each tray is further provided, on either of its lateral faces, with a roller 14 arranged at its back part and projecting hook 15 at its front part. Further, each tray supports a rack 16 on its upper plane face, along a lateral side edge of the die element 8.
  • FIG. 2, 3 and 4 show the detailed preforming stage which comprises a rotating drum 20 having a series of regularly spaced radial slits 21 formed therein.
  • the drum is mounted for rotation by bearings 22 on a shaft 23 mounted between two side-plates 24 of the frame.
  • the drum 20 is integral with a cog-wheel 25'which meshes with the racks 16 carried by each of the trays at the moment when the latter reaches the preforming stage.
  • slats 26 In the radial slits of the drum are slidably mounted slats 26 having tapered outer edges or ends 26 which are pushed outwards by resilient elements 27 such as, for example, helical springs.
  • Each of the slats 26 carries two guide-rollers 28 resting against paired cams 29, FIG. 4, rigidly mounted with respect to the frame.
  • FIG. 2 shows the profile of one of these cams, which in its larger part 29 is circular and maintains the slat in the bottom of its housing contrary to
  • the cam 29 has, in the vicinity of its lower part, a depression 29, the depth of which corresponds to the distance at which each slat 26 must penetrate into the corrugations of the opposite die element.
  • the drum 20 also carries plugs 30 arranged in the spaces between the slats, which plugs apply pressure to the sheet material and maintain the sheet material on the upper edges of the die corrugations.
  • Ramps 31 and 32 are provided before and after the drum in order to ensure correct feeding and guiding of the sheet material on both sides of the preforming stage.
  • the forming stage E which is one of the important parts of the installation, will be described in reference to FIGS. 1, 5, 6, 7 and 8.
  • the lower trays 6 made contiguous and locked with each other by means of the hooks 15 of adjacent trays in mesh on the rollers 14.
  • This stage of the installation is completed by a second set of die elements 40, the form of which is complementary to that of the lower dies, with the die elements 40 being also carried by trays 41 which are themselves fixed on two endless chains 42.
  • the chains 42 mesh with pairs of idler cog-wheels 43, 44.
  • the die elements 40 are, as set forth above, fixed in a removable manner on their trays, which also support two sets of guide-rollers 45, 46, the front rollers 45 having a thickness about twice that of the back rollers 46 so as to effect independent guiding for both sets of rollers.
  • FIGS. 1 and 5 are represented by chain-dotted lines the respective layouts of the roller-paths of the sets of rollers 45 and 46 with the layout 47 corresponding to the front rollers 45 and the layout 48 corresponding to the back rollers 46.
  • Each tray also supports, on either of its lateral faces, a fork 49 which is intended to engage a roller 13 carried by a lower tray 6.
  • the endless chains 42 are fixed on each upper tray in the vicinity of the front rollers, around axes 50.
  • the sheet material after having been heated in the preheating stage B to an adequate temperature to permit it to be deformed (60 to C for instance), reaches the preforming stage C.
  • the lower trays 6 moving in the zone of the arrow F reach this stage after being fixed or coupled to each other by means of hooks 15 arranged at their upper part, these hooks coming in mesh on the rollers 14 arranged at the lower part of the preceding tray.
  • the trays thus form a rigid system along the top side of the endless chain run thereby providing perfect continuity of the profile.
  • the rack 16 of a given tray comes in mesh with the cog-wheel 25 integral with the drum 20, which rotates the latter in the di rection of the arrow F During this rotation, the slats 26 pushed by their springs 27 penetrate in the successive corrugations of the die elements 8. This action ensures the introduction of a sufficient quantity of sheet material into the trough of the corrugations of die elements 8. It has been found that the filling of the troughs occurs pracitcally without tensioning the sheet and consequently without risk of breakage of the sheet.
  • the plugs 30 tend to maintain the sheet material on the top surface of the die corrugations and make the operation easier.
  • the sheet material already pre-corrugated passes into the heating stage D where it is subjected to a temperature of about 100to C., for instance, so that it can easily be deformed when reaching the final forming stage.
  • the upper discs 40 which are in the central part of the bottom side of their closed way are in mesh with the lower die elements 8 and are respectively made contiguous and locked together by the engagement of the forks 49 on the rollers 13 of the lower trays. Consequently, the upper trays 41 are directly driven by the lower trays 6, which ensures perfect synchronization of the motion of the trays 6 and 41.
  • the length of the bottom side of the upper conveying element is so chosen that the plastic sheet material maintained closely pressed between the two sets of dies moves a sufficient time to enable it to cool within the dies and to stabilize in the deformed configuration.
  • the rollers 45 and 46 of the upper trays again contact their respective guiding surfaces so that the trays 41 move progressively away from the lower trays 6 while maintaining horizontal alignment, then when trays 41 are distant enough from trays 6, they incline to allow the disengagement of the forks as they rotate around the wheels 44.
  • the lower trays then turn about the driving wheels 5a which causes the disengagement of the hooks 15 from the rollers l4; thereafter, the lower roller-paths are shaped to guide only the wider back rollers 11 and release of the front rollers so that all along the bottom run the chains are tightened and the trays assume an inclination such as shown in FIGS. 1 and 5.
  • the sheet material so formed is then directed to a cutting and storing stage or it may be subjected to other suitable treatments.
  • the dies 8, 40 and the drum 20 are very simply changed which enables adaption of the machine to the fabrication of a large variety of profiles which may differ as regards their form and their pitch;
  • the provision of a preforming stage is realized to ensure that a sufficient quantity of sheet material is supplied in the corrugations of the dies 8 before the forming operation itself, avoiding sheet breakage or tearing;
  • Continuous sheet material forming apparatus comprising:
  • 0 means for moving the first die elements in an endless path
  • d means for connecting the complementary die elements for motion in an endless path at least a portion of which is parallel and opposed to the endless path of the first die elements
  • additional sheet material forming means cooperating with said first die elements comprising additional sheet material forming means cooperating with said first die elements, wherein said additional forming means comprise a drum mounted for rotation on an axis parallel to and transverse of the endless path, a plurality of slats slidably and radially mounted on said drum, resilient means urging the slats radially outwardly and means for rotating the drum in synchronism with the movement of the first die means.
  • each of the first die elements and each of the complementary die elements is supported by a tray.
  • the cooperating latching means comprises a hook mounted on one end of each tray and a hook receiver carried at the opposite end.
  • the means for rotating the drum in synchronism with the movement of the first die means includes a rack integral with each of the first die elements and a cogwheel secured to the drum and adapted to engage with the first die element carried racks.
  • Continuous sheet material forming apparatus comprising:
  • 0 means for moving the first die elements in an endless path
  • d means for connecting the complementary die elements for motion in an endless path at least a portion of which is parallel and opposed to the endless path of the first die elements
  • said additional forming means comprise a drum mounted for rotation on an axis parallel to and transverse of the endless path, a plurality of slats slidably and radially mounted on said drum, resilient means urging the slats radially outwardly and 12.
  • said continuous sheet material forming apparatus comprises the sheet forming stage of an installation including at least one sheet material feeding stage and at least one sheet material heating stage.
  • the invention defined in claim 12 wherein the installation also includes a preheating stage for the sheet material and a preforming stage preceding the heating stage and the forming stage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Advancing Webs (AREA)
US00251645A 1972-05-09 1972-05-09 Sheet forming device Expired - Lifetime US3792952A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25164572A 1972-05-09 1972-05-09

Publications (1)

Publication Number Publication Date
US3792952A true US3792952A (en) 1974-02-19

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Application Number Title Priority Date Filing Date
US00251645A Expired - Lifetime US3792952A (en) 1972-05-09 1972-05-09 Sheet forming device

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Country Link
US (1) US3792952A (fr)
JP (1) JPS5651091B2 (fr)
BE (1) BE797903A (fr)
DE (1) DE2322684A1 (fr)
ES (1) ES414451A1 (fr)
FR (1) FR2183705B1 (fr)
IT (1) IT987217B (fr)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876359A (en) * 1972-06-08 1975-04-08 Elda Ag Device for wet-forming cardboard sheets into corrugated cardboard plates
US3888618A (en) * 1974-04-18 1975-06-10 Boeing Co Apparatus for die forming strip material
US3971243A (en) * 1974-04-18 1976-07-27 The Boeing Company Method for die forming strip material
US3986808A (en) * 1974-05-10 1976-10-19 Ici Australia Limited Apparatus for deforming thermoplastic sheet
US4017247A (en) * 1974-06-28 1977-04-12 Tetra Pak Developpement Sa Device for the forming of a packing material web in a packaging machine
EP0067473A2 (fr) * 1981-06-15 1982-12-22 Wavin B.V. Appareil pour la fabrication d'un tube profilé en matière plastique
US4498944A (en) * 1982-01-18 1985-02-12 Kimberly-Clark Corporation Method and apparatus for producing an elasticized garment by tucking a portion of the diaper web during bonding of elastic to the untucked portions of the web
US4505774A (en) * 1982-06-04 1985-03-19 Honda Giken Kogyo Kabushiki Kaisha Instrument panel manufacturing system
US4533587A (en) * 1981-05-29 1985-08-06 General Electric Company Connection insulators
US4543054A (en) * 1984-05-25 1985-09-24 Hitek Limited Thermoforming machine
US4610837A (en) * 1984-01-03 1986-09-09 The Boeing Company Apparatus and method for forming a corrugated sheet from a flat thermoplastic sheet
US5064598A (en) * 1989-11-27 1991-11-12 Hanspeter Seiler Process and apparatus for manufacturing a pleated filter insert
US5792307A (en) * 1994-02-02 1998-08-11 Lin Pac, Inc. Apparatus for forming a corrugated substrate
US5792487A (en) * 1996-04-10 1998-08-11 Witt Plastics Of Florida Inc. Corrugated plastic wall panels
US5814390A (en) * 1995-06-30 1998-09-29 Kimberly-Clark Worldwide, Inc. Creased nonwoven web with stretch and recovery
US20040220004A1 (en) * 2001-06-26 2004-11-04 Bourc'his Joel Linear belt actuator
US20080020080A1 (en) * 2006-06-28 2008-01-24 Marschke Carl R Method and Apparatus for Manufacturing Open Core Elements from Web Material
US20100086631A1 (en) * 2008-10-02 2010-04-08 Robert Frank Schleelein System and method for producing composite materials with variable shapes
US20110177298A1 (en) * 2007-08-10 2011-07-21 Richard Gardiner Corrugator
US20150104614A1 (en) * 2013-10-15 2015-04-16 Velcro Industries B.V. Forming longitudinally pleated products
US20170066031A1 (en) * 2014-02-25 2017-03-09 Sns Unicorp Pty. Ltd. Method And Apparatus For Forming Profiled Articles
CN108698247A (zh) * 2016-02-29 2018-10-23 株式会社今井产业 波形板制造***和波形板制造方法
US11235270B2 (en) 2015-08-17 2022-02-01 Parker-Hannifin Corporation Filter media packs, methods of making and filter media presses
US11278833B2 (en) 2015-08-17 2022-03-22 Parker-Hamilton Corporation Filter media packs, methods of making, and ultrasonic cutting or welding

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2755639B1 (fr) * 1996-11-12 1999-01-29 Onduline Sa Machine pour reprofiler des materiaux ondules
FR2755640B1 (fr) * 1996-11-12 1999-01-29 Onduline Sa Machine ondulatrice
DE10138941B4 (de) * 2000-08-08 2012-03-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur Herstellung von strukturierten Breit-Flach-Erzeugnissen
JP6360212B1 (ja) 2017-01-31 2018-07-18 ファナック株式会社 ワイヤ放電加工機

Citations (10)

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Publication number Priority date Publication date Assignee Title
US1245450A (en) * 1916-05-08 1917-11-06 Silas M Ford Machine for making lath-board.
US1287275A (en) * 1918-04-13 1918-12-10 Silas M Ford Machine for making lath-boards.
US2513777A (en) * 1947-12-09 1950-07-04 Chrysler Corp Apparatus for sinuous contoured material
US2533335A (en) * 1946-09-21 1950-12-12 Archibald L Wallace Vulcanizing mold having interlocking segments
US2764193A (en) * 1954-01-11 1956-09-25 Coruply Corp Endless web corrugating machine
US3218219A (en) * 1961-12-01 1965-11-16 Koppers Co Inc Web preconditioner
US3238565A (en) * 1961-09-22 1966-03-08 Sun Chemical Corp Continuous hot forming apparatus
US3350484A (en) * 1965-03-01 1967-10-31 Riegel Paper Corp Method and apparatus for making battery separators and the like
US3387332A (en) * 1966-08-18 1968-06-11 American Excelsior Corp Molding apparatus
US3514364A (en) * 1967-12-20 1970-05-26 Nippon Denso Co Apparatus for forming filter elements

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Publication number Priority date Publication date Assignee Title
US3066351A (en) * 1959-11-06 1962-12-04 Eagle Picher Co Method and apparatus for molding
BE626594A (fr) * 1961-12-28
NL140077B (nl) * 1968-07-02 1973-10-15 High Voltage Engineering Corp Inrichting voor het bestralen van materiaal met een door een versneller opgewekte elektronenbundel.
BE756524A (fr) * 1969-09-23 1971-03-23 Bp Chem Int Ltd Machine a mouler

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1245450A (en) * 1916-05-08 1917-11-06 Silas M Ford Machine for making lath-board.
US1287275A (en) * 1918-04-13 1918-12-10 Silas M Ford Machine for making lath-boards.
US2533335A (en) * 1946-09-21 1950-12-12 Archibald L Wallace Vulcanizing mold having interlocking segments
US2513777A (en) * 1947-12-09 1950-07-04 Chrysler Corp Apparatus for sinuous contoured material
US2764193A (en) * 1954-01-11 1956-09-25 Coruply Corp Endless web corrugating machine
US3238565A (en) * 1961-09-22 1966-03-08 Sun Chemical Corp Continuous hot forming apparatus
US3218219A (en) * 1961-12-01 1965-11-16 Koppers Co Inc Web preconditioner
US3350484A (en) * 1965-03-01 1967-10-31 Riegel Paper Corp Method and apparatus for making battery separators and the like
US3387332A (en) * 1966-08-18 1968-06-11 American Excelsior Corp Molding apparatus
US3514364A (en) * 1967-12-20 1970-05-26 Nippon Denso Co Apparatus for forming filter elements

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876359A (en) * 1972-06-08 1975-04-08 Elda Ag Device for wet-forming cardboard sheets into corrugated cardboard plates
US3888618A (en) * 1974-04-18 1975-06-10 Boeing Co Apparatus for die forming strip material
US3971243A (en) * 1974-04-18 1976-07-27 The Boeing Company Method for die forming strip material
US3986808A (en) * 1974-05-10 1976-10-19 Ici Australia Limited Apparatus for deforming thermoplastic sheet
US4017247A (en) * 1974-06-28 1977-04-12 Tetra Pak Developpement Sa Device for the forming of a packing material web in a packaging machine
US4533587A (en) * 1981-05-29 1985-08-06 General Electric Company Connection insulators
US4449910A (en) * 1981-06-15 1984-05-22 Wavin B.V. Apparatus for making profiled plastic tube
EP0067473A2 (fr) * 1981-06-15 1982-12-22 Wavin B.V. Appareil pour la fabrication d'un tube profilé en matière plastique
EP0067473A3 (en) * 1981-06-15 1986-09-17 Wavin B.V. Apparatus for making profiled plastics tube
US4498944A (en) * 1982-01-18 1985-02-12 Kimberly-Clark Corporation Method and apparatus for producing an elasticized garment by tucking a portion of the diaper web during bonding of elastic to the untucked portions of the web
US4505774A (en) * 1982-06-04 1985-03-19 Honda Giken Kogyo Kabushiki Kaisha Instrument panel manufacturing system
US4610837A (en) * 1984-01-03 1986-09-09 The Boeing Company Apparatus and method for forming a corrugated sheet from a flat thermoplastic sheet
US4543054A (en) * 1984-05-25 1985-09-24 Hitek Limited Thermoforming machine
US5064598A (en) * 1989-11-27 1991-11-12 Hanspeter Seiler Process and apparatus for manufacturing a pleated filter insert
US5792307A (en) * 1994-02-02 1998-08-11 Lin Pac, Inc. Apparatus for forming a corrugated substrate
US5814390A (en) * 1995-06-30 1998-09-29 Kimberly-Clark Worldwide, Inc. Creased nonwoven web with stretch and recovery
US5792487A (en) * 1996-04-10 1998-08-11 Witt Plastics Of Florida Inc. Corrugated plastic wall panels
US20040220004A1 (en) * 2001-06-26 2004-11-04 Bourc'his Joel Linear belt actuator
US7270619B2 (en) * 2001-06-26 2007-09-18 Serapid France Linear belt actuator
US20080020080A1 (en) * 2006-06-28 2008-01-24 Marschke Carl R Method and Apparatus for Manufacturing Open Core Elements from Web Material
US20110177298A1 (en) * 2007-08-10 2011-07-21 Richard Gardiner Corrugator
US20100086631A1 (en) * 2008-10-02 2010-04-08 Robert Frank Schleelein System and method for producing composite materials with variable shapes
US8123515B2 (en) * 2008-10-02 2012-02-28 Robert Frank Schleelein System and method for producing composite materials with variable shapes
US20150104614A1 (en) * 2013-10-15 2015-04-16 Velcro Industries B.V. Forming longitudinally pleated products
US9649792B2 (en) * 2013-10-15 2017-05-16 Velcro BVBA Forming longitudinally pleated products
US10532535B2 (en) 2013-10-15 2020-01-14 Velcro BVBA Longitudinally pleated products
US20170066031A1 (en) * 2014-02-25 2017-03-09 Sns Unicorp Pty. Ltd. Method And Apparatus For Forming Profiled Articles
US11235270B2 (en) 2015-08-17 2022-02-01 Parker-Hannifin Corporation Filter media packs, methods of making and filter media presses
US11278833B2 (en) 2015-08-17 2022-03-22 Parker-Hamilton Corporation Filter media packs, methods of making, and ultrasonic cutting or welding
US11944927B2 (en) 2015-08-17 2024-04-02 Parker Intangibles Llc Filter media packs, methods of making and filter media presses
CN108698247A (zh) * 2016-02-29 2018-10-23 株式会社今井产业 波形板制造***和波形板制造方法

Also Published As

Publication number Publication date
JPS49132154A (fr) 1974-12-18
DE2322684A1 (de) 1973-11-22
IT987217B (it) 1975-02-20
BE797903A (fr) 1973-07-31
FR2183705B1 (fr) 1976-04-23
JPS5651091B2 (fr) 1981-12-03
FR2183705A1 (fr) 1973-12-21
ES414451A1 (es) 1976-02-01

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