US3389733A - Flexible container of plastic material - Google Patents

Flexible container of plastic material Download PDF

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Publication number
US3389733A
US3389733A US555378A US55537866A US3389733A US 3389733 A US3389733 A US 3389733A US 555378 A US555378 A US 555378A US 55537866 A US55537866 A US 55537866A US 3389733 A US3389733 A US 3389733A
Authority
US
United States
Prior art keywords
wrapper
hook
tubing
fastener
profiled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US555378A
Other languages
English (en)
Inventor
Siegel Karl-Heinz
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.)
Minigrip Inc
Original Assignee
ASF GLEITVERSCHULSS GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ASF GLEITVERSCHULSS GmbH filed Critical ASF GLEITVERSCHULSS GmbH
Application granted granted Critical
Publication of US3389733A publication Critical patent/US3389733A/en
Assigned to MINIGRIP, INC., A CORP OF NY reassignment MINIGRIP, INC., A CORP OF NY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ASF GLEIRERSCHULSS G.M.G.H., KARL-HEINZ SIEGEL
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
    • A44B19/16—Interlocking member having uniform section throughout the length of the stringer
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S24/00—Buckles, buttons, clasps
    • Y10S24/30—Separable-fastener or required component thereof
    • Y10S24/50—Separable-fastener or required component thereof including member having elongated, resilient, interlocking face with identical, parallel cross-sections throughout its length

Definitions

  • a closure for a bag of plastic material of the type comprising complementary profiled strips longitudinally provided within the bag opening and which can be closed with one another by pressure and which can be opened at the opening of the bag by pulling apart the walls thereof.
  • the improved closure comprises one strip having a cross section including only one book facing the interior of the bag.
  • the complementary strip is secured to the other wall of the bag and includes a double strip comprising a first strip portion having a flat surface resting against the back of the hook when the strips are closed together and a second strip portion provided with a hook profile which is complementary to and engages when closed the hook of the first-mentioned strip.
  • This invention relates to a flexible wrapper of plastics material, which consists preferably of a tube section which has been obtained by forming transverse heat-sealed seams in a tubing of thermoplastic material, which tubing has on the inside two longitudinally extending, profiled strips, which can be hooked into each other under pressure.
  • Such wrappers of plastics material should be capable of being opened when required and to be closed in a simple manner when the contents or part thereof has been removed.
  • a known bag has walls consisting of plastics material sheeting and is provided near its edge between the mutually opposite inside surfaces of its walls with fastener elements, which can be caused to interengage and embrace each other.
  • the dimensions and/or shapes of said elements are selected so that the resistance to their separation by an internal pressure of the bag is a multiple of the force which is required for their interengagcment or for their separation by an action which is exerted from the outside on the edge-s of the walls.
  • the head of a rib constitutes an unsymmetrical, enlarged portion, which on both sides of the root forms surfaces for a hooklike engagement with the associated edges of a groove, and that one of these surfaces, which is on the inside of the rib, has a higher inclination relative to the wall of the bag than the surface on the outside of the rib.
  • the present invention is based on the experience, which 3,389,733 Patented June 25, 1968 has been obtained in practice and by tests, that the known hooking elements of the flexible wrapper of plastics material described initially hereinbefore are suflicient to afford the desired resistance to a force which is produced by an internal pressure.
  • one profiled strip consists of a unilateral hook, which is directed towards the inner part of the bag
  • the other profiled strip comprises two flanges, which extend at right angles from the inside surface of the wrapper and are disposed on opposite sides of the hook of the opposite profiled strip, that flange which is disposed on the outside of the fastener being arranged to engage the back of the "hook, and that flange which is disposed on the inside of the fastener comprising a unilateral hook tip, which has a concave or re-entrant inside surface.
  • the partial object of the invention to provide a wrapper which consists of plastics material and has hooking elements having enlarged interengaging surfaces is accomplished in that that flange of the one profiled strip which is disposed on the inside of the fastener consists of a unilateral tip having a concave inside surface hook. This results in a larger space between the two flanges which are to be interengaged. For this reason, the tips of the hooks may have a length which is sufficient to ensure a reliable closure.
  • the further partial object of the invention to enable an opening of the wrapper without need for overcoming a resistance which is generated because two flexible hooking elements must be disengaged by bending, when they rub on each other, is accomplished in that the flange disposed on the outside of the fastener does not form a hook and the intermediate flange disposed on the opposite inside surface of the wrapper has no hook tip on the outside of the fastener.
  • This profiled configuration takes account of the fact that any user of a wrapper of flexible plastics material in opening the same unconsciously performs with its hands a rotational movement about the longitudinal axes of the two profiled strips which have been hooked together so that the two unilateral hook elements are disengaged without need for a continually repeated expansion of the female part.
  • each of the interengaging surfaces of the two hooklike flanges includes an acute angle with the associated inside surface of the wrapper. This will ensure a particularly good closure in spite of the action of forces which might arise in the interior of the wrapper and tend to open the fastener. In view of the design of the profiled strips according to the invention, the fastener elements will not unduly resist an opening of the fastener from the outside.
  • the female profiled strip has a smooth back. This affords the advantage that the two profiled strips can be more easily interengaged than in known wrappers where the female profiled strip is tiltable relative to the inside wall of the wrapper.
  • FIG. 1 is a sectional view showing a cut-off portion of a wrapper according to the invention with the two profiled strips interengaged.
  • FIG. 2 is a diagrammatic view showing the die which is employed in the manufacture of the wrapper according to the invention.
  • FIG. 3 is a diagrammatic showing of the unconscious rotational movement which is performed by the hands about the longitudinal axes of the profiled strips when the wrapper is being opened from the outside.
  • FIG. 4 is a perspective view showing a broken-off portion of a seamless tubing, which has two profiled strips and is used in the manufacture of a wrapper according to the invention.
  • FIG. 5 shows a finished wrapper, which has been obtained by a fusion cutting and sealing operation from a tubing as shown in FIG. 4.
  • the wrapper is usually made from a seamless tubing 2 of plastics material.
  • This tubing is provided with the profiled strips 3, 4 while it is being extruded and/or blown.
  • plastics material sheeting may be used as a starting material.
  • the profiled strips 3, 4 are provided on the inside surface 5 of the tubing 2 and extend longitudinally and can be hooked together by an application of pressure, as is apparent from FIG. 5.
  • One profiled strip 3 consists of a unilateral hook '7, which is directed towards the interior 6 of the bag.
  • the other profiled strip 4 comprises two flanges 8, 9, which extend at right angles from the inside surface 5 of the wrapper 1 and are disposed on opposite sides of the hook 7 of the opposite profiled strip 3.
  • the flange 8 disposed on the outside of the fastener in the outer part of the wrapper engages the back 26 of the hook 7.
  • the flange 9 which is disposed on the inside of the fastener in the inner part 6 of the wrapper 1 comprises a unilateral hook tip 11 having a concave or re-entrant inside surface.
  • the female profiled strip 4 has a smooth back 12.
  • the interengaging surfaces 13, 14 of the two hook-shaped flanges 8, 7 include an acute angle on or [3, respectively, with the associated inside sur faces of the wrapper 1.
  • the die 15 may be designed as shown in FIG. 2.
  • An extrusion slot 18, from which the tubing 2 emerges, is defined between the die bushing 16 and the die insert 17.
  • the slot 19 for the flange 8 and the slot 20 for the unilateral hook tip 11 having a concave or re-entrant inside surface include an acuate angle
  • the action of the air stream which prevents a collapsing of the tubing 2 emerging from the extrusion slot 18 holds the flanges 8 and 9 spaced apart by a distance which corresponds to the width of the smooth back 12.
  • the wrapper according to the invention is not made from a flat sheeting but from an endless tubing 2, which has been integrally formed with the profiled strips in one operation, the tubing must be severed along line 21 in FIG. 5 so that two extensions 22, 23 are formed on the outside of the fastener.
  • the user instinctively grips the extensions 22, 23 so that the first two joints of each of its two forefingers are parallel to the two profiled strips 3, 4, as is apparent from FIG. 3, and the two thumbs have entered the gap which has been formed by slitting the tubing.
  • each of the extensions 22 and 23 is held between a thumb and forefinger of one hand.
  • the two extensions 22, 23 are moved apart. In this operation, the two hands instinctively perform a rotation about the longitudinal axes of the fastener strips 3, 4.
  • the wrapper is closed in the manner which is conventional with pressure fasteners.
  • the side edges of the individual wrapper shown in FIG. 5 are constituted by transverse heat-sealed seams 24, 25 formed in a tubing 2 as shown in FIG. 4 on an automatic bag-making machine.
  • a reclosable flexible container comprising, a bag body having flexible walls formed of a plastic film with an upwardly facing opening, releasably interlocking rib and groove elements integrally part of the walls on facing inner surfaces thereof formed of a resilient material and separable by applying a force directly to the walls drawing the elements apart and interlockable by pressing the elements together, and external flange means on the upper exposed edges of said walls which may be gripped and drawn apart to separate said elements, said rib element being L-shaped in cross section and defining a first downwardly depending unilateral hook projecting at right angles from the interior of the wall with which it is integrally formed toward the opposite wall of the bag body terminating in a flat face which seats against a portion of the opposite interior wall surface, said groove element comprised of two flanges projecting at right angles from the interior of the wall with which they are integrally formed, said flanges being spaced apart a distance corresponding with said portion of the opposite interior wall surface, one flange being in the form of a fiat bar and seating against the

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Packages (AREA)
  • Making Paper Articles (AREA)
  • Package Frames And Binding Bands (AREA)
US555378A 1965-07-07 1966-06-06 Flexible container of plastic material Expired - Lifetime US3389733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0098059 1965-07-07

Publications (1)

Publication Number Publication Date
US3389733A true US3389733A (en) 1968-06-25

Family

ID=7521189

Family Applications (1)

Application Number Title Priority Date Filing Date
US555378A Expired - Lifetime US3389733A (en) 1965-07-07 1966-06-06 Flexible container of plastic material

Country Status (10)

Country Link
US (1) US3389733A (xx)
AT (1) AT291095B (xx)
BE (1) BE682794A (xx)
CH (1) CH442131A (xx)
DE (1) DE1486627C3 (xx)
DK (1) DK110245C (xx)
ES (1) ES327763A1 (xx)
GB (1) GB1150632A (xx)
NL (2) NL6609039A (xx)
SE (2) SE312760B (xx)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020884A (en) * 1974-12-06 1977-05-03 Pierre Gaston Benoit Jadot Plastic bags
US4191230A (en) * 1978-02-16 1980-03-04 Minigrip, Inc. Integral extruded construction for bags
US4204526A (en) * 1978-08-31 1980-05-27 Samuels Peter B Arterial graft and package
US4561108A (en) * 1983-12-30 1985-12-24 Union Carbide Corporation Interlocking closure bag for use in high temperature environment
US4578813A (en) * 1984-06-11 1986-03-25 Minigrip Incorporated Bag and reclosable separable fastener assembly providing both closing alignment facility and differential separation resistance
US4736451A (en) * 1986-12-22 1988-04-05 Minigrip, Inc. Extruded zipper having combination stabilizing and differential opening means
US4767220A (en) * 1983-12-30 1988-08-30 First Brands Corporation Interlocking closure bar for use in high temperature environment
US4922588A (en) * 1983-12-30 1990-05-08 First Brands Corporation Single hinge interlocking closure profile configuration
US5248201A (en) * 1992-02-24 1993-09-28 Reynolds Consumer Products Inc. Interlocking closure for plastic storage bags with confirming color strips
US5356222A (en) * 1992-02-24 1994-10-18 Reynolds Consumer Products Inc. Interlocking closure for plastic storage bags with confirming color stripes
US5638586A (en) * 1996-05-13 1997-06-17 Illinois Tool Works, Inc. Transverse zipper system
US6007246A (en) * 1998-09-29 1999-12-28 Kraft Foods Inc. Reclosable container arrangement
US7784160B2 (en) 2007-03-16 2010-08-31 S.C. Johnson & Son, Inc. Pouch and airtight resealable closure mechanism therefor
US7857515B2 (en) 2007-06-15 2010-12-28 S.C. Johnson Home Storage, Inc. Airtight closure mechanism for a reclosable pouch
US7874731B2 (en) 2007-06-15 2011-01-25 S.C. Johnson Home Storage, Inc. Valve for a recloseable container
US7886412B2 (en) 2007-03-16 2011-02-15 S.C. Johnson Home Storage, Inc. Pouch and airtight resealable closure mechanism therefor
US7887238B2 (en) 2007-06-15 2011-02-15 S.C. Johnson Home Storage, Inc. Flow channels for a pouch
US7946766B2 (en) 2007-06-15 2011-05-24 S.C. Johnson & Son, Inc. Offset closure mechanism for a reclosable pouch
US7967509B2 (en) 2007-06-15 2011-06-28 S.C. Johnson & Son, Inc. Pouch with a valve

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE567093A (xx) *
US2144755A (en) * 1937-01-11 1939-01-24 Eugene L Alexander Closure device
US2780261A (en) * 1954-10-26 1957-02-05 Flexigrip Inc Sliderless fastener closure
FR1132628A (fr) * 1955-08-18 1957-03-13 Produits Ind Nouveaux Soc D Perfectionnements apportés aux bandes souples, notamment pour fermetures sans curseur, s'accrochant par des parties profilées qui se recouvrent mutuellement
US2823721A (en) * 1954-10-26 1958-02-18 Flexigrip Inc Sliderless fastener closure
GB965258A (en) * 1960-06-06 1964-07-29 Ausnit Edgar Michael Improvements in or relating to separable closures
US3172443A (en) * 1962-02-19 1965-03-09 Ausnit Steven Plastic fastener
US3198228A (en) * 1961-11-27 1965-08-03 Seisan Nipponsha Kk Integral reclosable bag
US3226787A (en) * 1962-05-17 1966-01-04 Ausnit Steven Double extruded fastener strips

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE567093A (xx) *
US2144755A (en) * 1937-01-11 1939-01-24 Eugene L Alexander Closure device
US2780261A (en) * 1954-10-26 1957-02-05 Flexigrip Inc Sliderless fastener closure
US2823721A (en) * 1954-10-26 1958-02-18 Flexigrip Inc Sliderless fastener closure
FR1132628A (fr) * 1955-08-18 1957-03-13 Produits Ind Nouveaux Soc D Perfectionnements apportés aux bandes souples, notamment pour fermetures sans curseur, s'accrochant par des parties profilées qui se recouvrent mutuellement
GB965258A (en) * 1960-06-06 1964-07-29 Ausnit Edgar Michael Improvements in or relating to separable closures
US3198228A (en) * 1961-11-27 1965-08-03 Seisan Nipponsha Kk Integral reclosable bag
US3172443A (en) * 1962-02-19 1965-03-09 Ausnit Steven Plastic fastener
US3226787A (en) * 1962-05-17 1966-01-04 Ausnit Steven Double extruded fastener strips

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020884A (en) * 1974-12-06 1977-05-03 Pierre Gaston Benoit Jadot Plastic bags
US4191230A (en) * 1978-02-16 1980-03-04 Minigrip, Inc. Integral extruded construction for bags
US4204526A (en) * 1978-08-31 1980-05-27 Samuels Peter B Arterial graft and package
US4561108A (en) * 1983-12-30 1985-12-24 Union Carbide Corporation Interlocking closure bag for use in high temperature environment
US4767220A (en) * 1983-12-30 1988-08-30 First Brands Corporation Interlocking closure bar for use in high temperature environment
US4922588A (en) * 1983-12-30 1990-05-08 First Brands Corporation Single hinge interlocking closure profile configuration
US4578813A (en) * 1984-06-11 1986-03-25 Minigrip Incorporated Bag and reclosable separable fastener assembly providing both closing alignment facility and differential separation resistance
US4736451A (en) * 1986-12-22 1988-04-05 Minigrip, Inc. Extruded zipper having combination stabilizing and differential opening means
US5248201A (en) * 1992-02-24 1993-09-28 Reynolds Consumer Products Inc. Interlocking closure for plastic storage bags with confirming color strips
US5356222A (en) * 1992-02-24 1994-10-18 Reynolds Consumer Products Inc. Interlocking closure for plastic storage bags with confirming color stripes
US5638586A (en) * 1996-05-13 1997-06-17 Illinois Tool Works, Inc. Transverse zipper system
US6007246A (en) * 1998-09-29 1999-12-28 Kraft Foods Inc. Reclosable container arrangement
US7784160B2 (en) 2007-03-16 2010-08-31 S.C. Johnson & Son, Inc. Pouch and airtight resealable closure mechanism therefor
US7886412B2 (en) 2007-03-16 2011-02-15 S.C. Johnson Home Storage, Inc. Pouch and airtight resealable closure mechanism therefor
US8176604B2 (en) 2007-03-16 2012-05-15 S.C. Johnson & Son, Inc. Pouch and airtight resealable closure mechanism therefor
US8827556B2 (en) 2007-03-16 2014-09-09 S.C. Johnson & Son, Inc. Pouch and airtight resealable closure mechanism therefor
US7857515B2 (en) 2007-06-15 2010-12-28 S.C. Johnson Home Storage, Inc. Airtight closure mechanism for a reclosable pouch
US7874731B2 (en) 2007-06-15 2011-01-25 S.C. Johnson Home Storage, Inc. Valve for a recloseable container
US7887238B2 (en) 2007-06-15 2011-02-15 S.C. Johnson Home Storage, Inc. Flow channels for a pouch
US7946766B2 (en) 2007-06-15 2011-05-24 S.C. Johnson & Son, Inc. Offset closure mechanism for a reclosable pouch
US7967509B2 (en) 2007-06-15 2011-06-28 S.C. Johnson & Son, Inc. Pouch with a valve
US8231273B2 (en) 2007-06-15 2012-07-31 S.C. Johnson & Son, Inc. Flow channel profile and a complementary groove for a pouch

Also Published As

Publication number Publication date
CH442131A (de) 1967-08-15
GB1150632A (en) 1969-04-30
SE7412074L (xx) 1974-09-25
BE682794A (xx) 1966-12-01
NL7611072A (en) 1977-01-31
DK110245C (da) 1974-06-24
NL6609039A (xx) 1967-01-09
DE1486627A1 (de) 1969-07-10
DE1486627C3 (de) 1974-11-28
NL169282C (nl) 1982-07-01
NL169282B (nl) 1982-02-01
SE312760B (xx) 1969-07-21
AT291095B (de) 1971-06-25
ES327763A1 (es) 1967-04-01
DE1486627B2 (de) 1974-05-02

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MINIGRIP, INC., ROUTE 303, ORANGEBURG, NY A CORP O

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:KARL-HEINZ SIEGEL;ASF GLEIRERSCHULSS G.M.G.H.;REEL/FRAME:004231/0196

Effective date: 19840302