CA2433470C - Apparatus for forming a guide rib on a section of plastic film - Google Patents

Apparatus for forming a guide rib on a section of plastic film Download PDF

Info

Publication number
CA2433470C
CA2433470C CA002433470A CA2433470A CA2433470C CA 2433470 C CA2433470 C CA 2433470C CA 002433470 A CA002433470 A CA 002433470A CA 2433470 A CA2433470 A CA 2433470A CA 2433470 C CA2433470 C CA 2433470C
Authority
CA
Canada
Prior art keywords
groove
roll
plastic film
section
rib
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
CA002433470A
Other languages
French (fr)
Other versions
CA2433470A1 (en
Inventor
James C. Pawloski
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.)
SC Johnson Home Storage Inc
Original Assignee
SC Johnson Home Storage Inc
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 SC Johnson Home Storage Inc filed Critical SC Johnson Home Storage Inc
Publication of CA2433470A1 publication Critical patent/CA2433470A1/en
Application granted granted Critical
Publication of CA2433470C publication Critical patent/CA2433470C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07Flat, e.g. panels
    • B29C48/08Flat, e.g. panels flexible, e.g. films
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/30Extrusion nozzles or dies
    • B29C48/35Extrusion nozzles or dies with rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/88Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911Cooling
    • B29C48/9135Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/88Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911Cooling
    • B29C48/9135Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/9155Pressure rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/88Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911Cooling
    • B29C48/9135Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/9175Cooling of flat articles, e.g. using specially adapted supporting means by interposing a fluid layer between the supporting means and the flat article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/022Particular heating or welding methods not otherwise provided for
    • B29C65/028Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824Actuating mechanisms
    • B29C66/8242Pneumatic or hydraulic drives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411Roller, cylinder or drum types
    • B29C66/83413Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411Roller, cylinder or drum types
    • B29C66/83415Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057Moulding single grooves or ribs, e.g. tear lines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2005/00Elements of slide fasteners
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/727Fastening elements
    • B29L2031/7282Snap fasteners, clips, press-buttons
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702For plural parts or plural areas of single part
    • Y10T156/1712Indefinite or running length work
    • Y10T156/1741Progressive continuous bonding press [e.g., roll couples]

Abstract

A method and apparatus for forming a rib on a section of plastic film utilizes a roll having a groove, extrudes molten polymer into the groove, and places the section of plastic film in contact with the molten polymer in the groove. The molten polymer in the groove is allowed to cool below the melting point thereof while the section of plastic film is in contact with the polymer to cause bonding therebetween and thereby form the rib.

Description

PATENT APPIdCATION
Docket IVo_ J-3403 _1_ APPARATUS FOR FORMING A GUIDE
RIB ON A SECTION OF PLASTIC FILM
~eehnical Field The present invention relates to thermoplastic storage bags, and more particularly an apparatus for producing guide ribs for reclosable thermoplastic storage bags.
Backgaround Art Thermoplastic storage bags having reclosable fasteners have been in wide use to store various items. One type ofbag includes interengagabie male and female closure elements or profiles that may be closed by pinching the elements together at one end thereof between a user's fxriger and thumb and sliding the user's opposed 1'rngex anal thumb along the elements toward another end of the bag. One difficulty faced by a user of such a x 5 bag results firom misalignment of the male anci female closure elements of the ba$ as the user is attempting to seal the bag. Often, such misalignment prevents full closure of the bag and typically results in wasted effort and fiustr~tion by the useer.
Attempts have been made over the yeayrs to provide a stricture that facilitates closing of a bag by a user. An example of such a stxucriue comprises a guide r~ disposed on each side of the closure elements and extending parallel thereto_ The guide ribs) guide the user's fiager and thumb as the user is attempting to close the bag so that the incideaee of closure clement misalignmexxt is minimized.
l~axr~,p U_S. Patent No. 4,30b,924 discloses an apparatus for producing a plastic container having occludable closure strips. The closure strips are supplied from a supply source and fed to a control roll, wherein the control roll in turn feeds the closure strips to an optional heating means that preheats a base portion of the closure strips.
The closure strips are then transferred to a rotating casting eylir~der having a pair of spaced apart circumferential grooves. The closure profiles are disposed in the grooves of the casting cylinder as the casting cylinder rotates and plastic fxlxn is extruded onto the casting cyiiz~dex to produce a plastic film wittlW rtegral closure profiles.
-2-Zieke et al. U.S. Patent No. 4,741,789 discloses a method and apparatus for applying a profile and adjacent ribs to a traveling film web. The method comprises the steps of drawing a web of bag film over idler rolls into a forming and joining station. The forming and joining station includes a hopper for receiving plastic material, a body with heating means for heating and melting the plastic material and a screw auger for advancing the molten plastic material to a die block. The method further comprises the steps of applying a base member to the film by means of a polytetrafluorethylene-coated lay-on roller and extruding a male profile member, a first rib member and a second rib member as separate extrudates on a bag film web.
Geiger et al. U.S. Patent No. 4,755,248 discloses a method and apparatus for producing a reclosable bag film. The method comprises the steps of drawing a film web from a die block around a driven rotatable casting roll and passing the film web over idler rolls to a closure member extrusion and joining station. A female profile is extruded from a first extruder and a male profile is extruded from a second extruder onto the film web as the film web passes around an idler_roll at the station. The method further comprises the step of passing the film web and profiles around a chilled casting roll to cool the film web and profile.
Summary of the Invention In one aspect of the invention there is provided an apparatus for forming a rib on a section of plastic film, the apparatus including a roll having a groove, an extrusion die for extruding molten polymer into the groove and a positioning system that places a section of plastic film in contact with the molten polymer in the groove such that the molten polymer in the groove is allowed to cool below the melting point thereof while the section of plastic film is in contact with the polymer to cause bonding there between and thereby forming a rib.
The section of plastic film may carry a closure element, in which case the roll includes a groove that receives the closure element when the section of plastic film is in contact with the polymer.
-3-The positioning system may include a second roll made of a deformable material, which directs the plastic film towards the first roll.
Other aspects and advantages of the present invention will become apparent upon consideration of the following detailed description.
Brief Description of the Drawings FIG. 1 is an elevational view of a reclosable thermoplastic storage bag according to the present invention;
FIG. 2 is an enlarged, fragmentary, sectional view taken generally along the lines 2-2 of FIG. 1;
FIGS. 3-8 are sectional views similar to FIG. 2 illustrating alternative bags produced in accordance with the present invention;
FIG. 9 is an isometric view of a bag according to the present invention having intennittent ribs;
FIG. 10 is a fragmentary and enlarged elevational view of a portion of zipper tape according to the present invention;
FIG. 11 is an isometric view of an apparatus for producing bags according to the present invention;
FIG. 12 is a bottom elevational view of an extrusion die profile plate used in the apparatus of FIG. 11;
FIG. 13 is a cross-sectional view taken generally along the lines 13-13 of FIG. 11;
-4-FIGS. 14-16 are isometric views similar to FIG. 11 of an alternate apparatus for producing bags according to the present invention;
FIG. 17 is a cross sectional view taken generally along the lines 17-17 of FIG. 16;
FIG. 18 is an isometric view similar to FIGS. 11 and 14-16 of an alternate apparatus for producing bags; and FIG. 19 is an isometric view similar to FIGS. 11 and 14-16 of a still further alternate apparatus for producing bags.
Description of the Preferred Embodiments Referring to FIG. 1, a reclosable pouch in the form of a thermoplastic storage bag comprises first and second body portions 22, 24 joined to one another to form first and second bag walls 26, 28. The first and second bag walls 26, 28 are joined at first and second side portions 30, 32, respectively, and at a bottom portion 34. An opening 35 is disposed at a top portion 36 of the bag 20. A closure mechanism 38 and two lips 40 are 15 also disposed at the top portion 36 of the bag 20.
Refen-ing to FIG. 2, female and male closure elements 44a, 44b of the closure mechanism 38 are disposed on opposing inside surfaces 46, 48 of the first and second body portions 22, 24, respectively. According to a first embodiment, guide robs SOa, SOb are disposed on the inside surface 46 of the first body portion 22 on either side of (i.e., 20 flanking) the female closure element 44a. The guide ribs SOa, SOb extend in a direction generally paxallel to the closure elements 44a, 44b and are spaced sufficiently therefrom to guide a user's fingers) and facilitate alignment of the closure elements 44a and 44b into interlocking engagement when sealing the closure mechanism 38.
The male closure element 44b comprises a base ~8 integral with flanking side members 54 and 56 and an arrow-shaped engagement member 60 that extends from the base 58. The female element 44a comprises a base 62 with a C-shaped profile member 64 extending therefrom, wherein the female element 44a is adapted to receive the male element 44b when pressure is exerted on the closure elements by a user's fingers) during closing of the bag. The side members S4 and S6 are of a sufficient size and proximity to the engagement member 60 such that the side members S4 and 56 move together with the
-5-member 60 when the members 60 and 64 are engaged and disengaged. The side members 54 and 56 also have a height which is less than the height of the engagement membex 60, and the members 54 and 56 extend beyond tips 68 of the female profile member 64 when the engagement member 60 is engaged with the female profile member 64. Thus, at such time, the tips 68 of the female profale member 64 reside between the side members 54 and 56 and the male engagement member 60.
In a preferred embodiment, the guide ribs 50a, 50b are' of the same height and such height is greater than the height of the female profile member 64. The guide ribs 50a, 50b can have any suitable cross-sectional configuration, such an inverted T-shape, as seen in FIGS. 2-4 and 7-8, an inverted Y-shape as seen in FIG.. 6, a semi-circular cross-sectional shape as seen in FIG. 5, a triangular cross-sectional shape as seen in FIG. 5, etc...
Preferably, the guide ribs SOa, 50b are spaced apart approximately 0.4 inches on center, are approximately 0.09 inches in height and have an approximate width of 0.067 inches at the widest point thereof.
I 5 If desired, a number of guide ribs) 50 other than two may be provided. in the event that two or more guide ribs are provided, the guide ribs 50 may all have the same cross-sectional shapes and dimensions, or the cross-sectional shapes and/or dimensions may be different. The guide ribs) 50 may be present in various different arrangements.
Thus, fnr example, as seen in FIGS. 3 and 4, a single rib 50c may be provided on either inside surface 46 or 48, wherein the rib 50c is positioned and configured identically to either of the ribs 50a, 50b described above. In this case, the single rib 54c can be disposed on a side of the member 60 or 64 toward the top portion 36 or toward the bottom portion 34 of the bag.
Other various configurations of guide ribs can be seen in FIGS. 5 and 6. In FIG. 5, two guide ribs 50d and 50e may be provided on the inside surface 46. The ribs ~Od and 50e are positioned identically to the ribs 50a, 50b described above, but are configured such that the guide rib 50d has a triangular cross-sectional configuration and the guide rib 50e has a semi-circular cross-sectional configuration. The ribs 50f and 54g of FIG. 6 are configured identically to the ribs 50a, 50b described above, but are disposed on the inside surface 48.

-s-Still more configurations of guide ribs are shown in FIGS. 7 and 8. FIG. 7 illustrates a first guide rib 50h positioned on the inside surface 46 and a second guide rib 50i positioned on the opposite inside surface 48, wherein the guide ribs are configured similarly to the ribs 50a, 50b as described above. In FIG. 8, a first set of guide ribs 50j and 50k is positioned on the inside surface 46 and a second set of guide ribs 50m and 50n is positioned on the inside surface 48. The ribs SOj, 50k are disposed within the ribs 50m, 50n and the ribs 50j, 50k, 50rn and 50n are otherwise configured similarly to the ribs 50a, 50b as described above and shown in FIG. 2.
Preferably, although not necessarily, if two guide ribs 50 are positioned adjacent a closure element 44a or 44b, the guide ribs 50 may be spaced equidistant from and on opposite sides of the closure element. Also, if a single: rib 50 is positioned on the inside surface 48 adjacent the male closure element 44b and a second single rib 50 is positioned on the opposite inside surface 46 adjacent the female closure element 44a, the guide ribs 50 are preferably (although not necessarily) disposed on opposite sides of the closure elements 44a, 44b and equidistant therefrom.
No mattes what configuration is chosen, the guide ribs) 50 provide raised portions that can be felt by a user's fingers when the user's fingers are brought into contact with one or both external surfaces 70, 72 of t<he bag walls 26, 28. The raised portions) act as a guide for a user's fingers to facilitate the engagement of the male and female closure elements 44a and 44b, and thus sealing of the bag 20.
If desired, one or more gripping ribs 74 may be disposed on the internal surfaces 46, 48 of the bag 20 between the closure elements 44a and 44b and the top portion 36 of the bag 20, wherein the gripping ribs 74 are integrally extruded with the walls of the bag.
Any number of gripping ribs 74 can be used, although space is necessary between adjacent ribs in order to facilitate a gripping action with a usex's fingers. In a preferred embodiment, about six or seven gripping ribs 74 are disposed on each lip 40.of the bag.
According to an alternate embodiment, one or more intermittent ribs may be provided, as opposed to the continuous ribs 50a - 50n described above. FIG. 9 illustrates the second bag wall 28 of the bag 20, wherein two guide ribs 50p and 50q are disposed on the inner surface 48 parallel to and spaced apart from the: male closure element 44b and wherein the two ribs 50p, 50q extend intermittently from the first side portion 30 to the second side portion 32 of the bag 20.
Yet another embodiment as shown in FIG. 10 comprises a zipper tape 140. The zipper tape 140 includes first and second thermoplastic strips 142, I44, wherein female and male closure elements 44a, 44b are attached to or otherwise formed on the first and second thermoplastic strips 142, I44, respectively. Continuous or intermittent guide ribs SOr, SOs may be disposed on the first or second thermoplastic strips 142, 144, parallel to and spaced apart from the female or male closure elements 44a, 44b in any configuration as described above. Alternatively, a single guide rib or three or more guide xibs may be disposed on the strips 142, 144 as noted above. The zipper tape 140 may be attached to a folded thermoplastic sheet by any suitable conventional process and apparatus and the resulting structure may be severed and sealed at spaced locations to form individual bags.
Reclosable thermoplastic storage bags as described herein can be produced by any conventional bag-making process, such as a cast post applied process, a cast integral process, a blown process or any other process known in the art. Alternatively, any one of the processes implemented by the apparatus shown in FIGS. 11-19 could be used to produce the bag described herein.
If the female and male closure elements 44a, 44b are to be added to a section of film subsequent to the formation of one or more guide robs 50 thereon, an apparatus as seen in FIGS. I 1-13 can be employed. FIG. 11 depicts an apparatus for forming one or more ribs at high speeds that includes a rotatable first roll 160, a rotatable second roll 162, an extrusion profile die 166, and an air nozzle 168 disposed below the extrusion profile die 166. The extrusion profile die 166 includes a profile plate 167 having at least one, and preferably two outlet orifices 169, 171 thxough which molten polymeric material is extruded into a like number of associated grooves I73, I74, respectively, formed in the first roll 160 at a first axial end 160a thereof: The grooves 173, 174 in the first roll 160 have the same cross-sectional shapes as the desired end shapes of the ribs 50.
Preferably, although riot necessarily, the grooves 173, 174 have cross-sectional shapes that are substantially identical to one another and the outlet orifices 169,171 have shapes that are substantially identical to one another. Also preferably, (although not necessarily, as noted _8_ below) each of the outlet orifices 169,171 has.a shape similar or substantially identical to the cross-sectional shape of the associated groove 173, 174 of the first roll 160, whether that shape is an inverted T-shape, an inverted Y-shape, triangular, semi-circular, or another geometric shape. As seen in FIGS. 1 l, 15, 16 and 18, a positioning system 150 includes the second roil 162 and the film 172 and, in other embodiments such as FIG. 14, may include another rotatable roll 164.
In an alternative embodiment, the outlet orifices 169,171 have cross-sectional shapes that are substantially different than the cross-sectional shapes of the grooves 173, 174. For example, the outlet orifices I 69,171 may have a circular shape while the grooves I O 173, 174 may be triangular in cross-section.
The method includes the steps of feeding molten polymer to extrusion profile die 166 by way of an extruder or melt pump and extruding molten polymer into the grooves 173, 174 of the rotating first roll 160 at an extrusion rate that ensures that the grooves I 73, 174 are filled with molten polymer. Thereafter, the air nozzle 168 directs an air flow onto I S the molten polymer before it is deposited in the grooves 173, I 74.
If desired, a different fluid may be directed against the molten polymer in the grooves 173, I74. Also, the single air nozzle 168 may be replaced by two air nozzles wherein each air nozzle directs air against molten polymer in an associated l,~roove 173, 174. Still further, it is possible to eliminate the air nozzle 168 from this process; however, 20 this may require greater positioning accuracy so that the extrudate falls exactly into the grooves 173, 174.
The method further includes the step of moving a section of plastic film 172 over the rotating second roll 162 toward the first roll 160 and into contact with the molten polymer in the grooves 173, I 74. Thereafter, the section of plastic film 172 is drawn 25 around a predetermined angular extent of the first roll 160, for example, one half to three quarters of the entire angular extent of the first roll 160. It is also preferred that the first roll 160 be chilled, preferably by passing water therethrough to~ facilitate bonding of the ribs to the film 172. As should be evident, the larger the diameter of the roll 160, the more cooling can be imparted to the ribs. If desired, water, air or another coolant can be directed against the outer surface of the film section 172 as the film 172 and ribs 50 are moving about the first roll 160 to aid further in cooling of the ribs.
Again, if the female and male closure elements 44a, 4411 are added to the film in a step subsequent to the step of adding or forming guide ribs 50, another method implemented by the apparatus shown in FIG. 14 can be employed. The apparatus of FIG.
14 is similar to that of FIG. 11, except that it further includes a third rotatable roll 164 positioned below the second roll 162. During movement of the section of plastic film 172, the third roll 164 further presses the section of plastic filar I72 overlying the grooves 173, 174 into intimate contact with the molten polymer in the grooves 173, 174 to facilitate bonding and proper formation of the ribs. The third roll 164 is controlled by a hydraulic actuator 175 that controls the amount of pressure exerted on the plastic film 172 by the third roll 164.
If the female and male closure elements 44a, 44b have already been applied to the film section 172, the embodiment of FIG. I S can be employed to add or form the guide I S ribs 50. In FIG. 15, a rotatable roll 176 is situated adjacent the first roll 160. The method includes the same steps as described above in connection with FIGS. 11-13, except that pressure may be applied by the roll I 76 against the roll I 60 so that the film is brought into intimate contact with the molten polymer in the grooves 173, 174 without deforming the female and male closure elements 44a, 44b. Thereafter, the section of plastic film 172 is drawn around substantially the entire perimeter of the first roll I 60. The position of the second roll 176 is controlled by hydraulic actuators 178 that control the amount of pressure exerted by the roll 176 on the roll I 60.
If the female and male closure elements 44a, 44b have already been applied to the film section 172, the first roll 160 can include first and second additional grooves 182a, 182b, as seen in FIG. 16. The groove 182a is disposed between the grooves 173, 174 at a first end 184 of the roll I 60, while the second groove 182b is disposed at a second end 186 of the roll 160. The grooves 182a, I 82b accommodate the female and male closure elements 44a, 44b, respectively, in the event that the ribs are to be applied to the same side of the film section 172 as the closure elements 44a, 44b. FIG. 17 shows a cross-sectional view of the three grooves 173, 174 and 182a of FIG. 16. The groove 182a has dimensions -1 ~-that are just slightly larger than the cross-sectional dimensions of the female closure element 44a so that the fit of the closure element 44a in the groove 182a is tight so that positioning accuracy is established and maintained. If desired, the male closure element 44b may also have a tight fit within the groove 182b to obtain further positioning accuracy.
As a still further alternative, where the ribs are to be applied to a side of the plastic film 172 opposite to the side that carries the female and male closure elements 44a, 44b, grooves may be provided in the first roll 160 and the second roll 162 (or the rolls 164 and/or 176, if used), as shown in FIG. I 8. The groove 188a is disposed at a first end 190 of the second roll I62, while the second groove 188b is disposed at a second end 192 of the second roll 162. The grooves I88a, I88b accommodate the female and male closure elements 44a, 44b, respectively. The grooves 188a, 188b have dimensions similar to the grooves 182a, 182b of FIG. 16.
If desired, any or all of the rolls 162, 164 and 176 may be made of rubber or another defonnable material that assists in applying pressure to the film while minimizing permanent deformation of the ribs) and/or closure elements 44a, 44b.
FIG. 19 illustrates yet another alternative apparatus wherein a further pair of grooves 200, 202 substantially identical to the grooves 173, I74 are provided at a second axial end I60b of the roll I60. An extrusion profile die 206 identical or similar to the extrusion profile die 166 is provided having outlet orifices aligned with the grooves 200, 202. The extrusion profile die 206 deposits extxudate into the grooves 200, 202 and the roll 162 presses the film I72 into intimate contact with the extrudate in the grooves 200, 202 to form ribs adjacent an edge 208 of the film 172 opposite an edge 210 at which the ribs 50 are formed in accordance with the apparatus of FIGS. 11-13. An air nozzle 212 directs air against the extrudate before deposit thereof into the grooves 200, 202. As in all of the preceding embodiments, once the ribs are formed by the apparatus of FIG. 19, the film 172 is folded lengthwise and severed and sealed at spaced locations to foam individual bags, for example, as seen in F1G. 8.
If desired, the apparatus of FIG. 19 can be modified in accordance with the teachings of any of FIGS. l4-2 6 and 18.

As should be evident from the foregoing, the bag of FIG. 3 can be produced by any ofthe apparatus of FIGS. I I-17, so long as a single orifice is provided in the profile plate 167 and a single groove is provided in the roll 160. The same is true of the bag of FIG. 5, so long as grooves 173, I74 of different cross-sectional shape are provided in the roll 162.
The bags of FIGS. 4 and 6 can be produced by the apparatus of FIG. 19, so long as the extrusion profile die 166 and the grooves 173, 174 are omitted and the desired number of orifices are provided for the die 206 and a like number of grooves are provided in the roll I60 at the second axial end 160b. The bag illustrated in FIG. 7 can be produced by the apparatus of FIG. 19, modified as noted above to provide a single groove at each axial end I60a, 160b and a single outlet orifice for each die 166 and 206.
Industrial Applicability The bag described herein advantageously includes at least on guide surface that guides a user's fingers during closure of the bag. Thus, closing efficiency is increased and 1 S the expenditure of wasted effort by the user is minimized.
Further, the apparatus and method described herein extrude polymer from a profile die into grooves on a first grooved and cooled roller to create ribs. The still molten ribs are combined with a film and cooled as it rotates around the grooved roller.
The use of grooves in the first roller to create the ribs allows the ribs to have a uniform size and shape, whereas, when molten polymer is extruded directly onto a film to create ribs, the ribs may deform or spread out.
The method described herein also has the advantage of being a continuous process that has relatively high production rates of up to or greater than 300 feet per minute. Other similar processes cannot reach such production levels because the time necessary to cool the ribs and film is longer.
Numerous modifications will be apparent to those skilled in the art in view of the foregoing description. Accordingly, this description is to be construed as illustrative only and is presented for the purpose of enabling those skilled in the art to make and use the invention and to teach the best mode of carrying out same. The exclusive rights to all modifications which come within the scope of the appended claims are reserved.

Claims (17)

I claim:
1. An apparatus for forming a rib on a section of plastic film, comprising:
a roll having a groove;
an extrusion die for extruding molten polymer into the groove; and a positioning system comprising a second roll made of a deformable material, wherein the second roll directs the plastic film toward the first-named roll, and wherein the positioning system places the section of plastic film in contact with the molten polymer in the groove such that the molten polymer in the groove is allowed to cool below the melting point thereof while the section of plastic film is in contact with the polymer to cause bonding therebetween and thereby forming the rib.
2. The apparatus of claim 1, wherein the section of plastic film carries a closure element and wherein the second roll includes a groove that receives the closure element.
3. The apparatus of claim 1, wherein the positioning system includes a third roll that presses the section of plastic film against the molten polymer.
4. The apparatus of claim 3, wherein the third roll is made of a deformable material.
5. The apparatus of claim 3, wherein the section of plastic film carries a closure element and wherein at least one of the first-named, second and third rolls includes a groove that receives the closure element.
6. An apparatus for forming a rib on a section of plastic film, comprising:
a roll having a groove;
an extrusion die for extruding molten polymer into the groove; and a positioning system that places the section of plastic film in contact with the molten polymer in the groove such that the molten polymer in the groove is allowed to cool below the melting point thereof while the section of plastic film is in contact with the polymer to cause bonding therebetween and thereby forming the rib, wherein the section of plastic film carries a closure element and wherein the roll includes a groove that receives the closure element when the section of plastic film is in contact with the polymer.
7. The apparatus of claim 6, wherein the groove has dimensions larger than dimensions of the closure element.
8. The apparatus of claim 1, wherein the positioning system includes an air knife that presses the plastic film against the rib.
9. The apparatus of claim 1, wherein the roll is chilled by water.
10. The apparatus of claim 1, wherein the positioning system includes an air nozzle that directs an air flow onto the molten polymer before the molten polymer is deposited into the groove.
11. The apparatus of claim 1, wherein the extrusion die includes a profile plate wherein the profile plate includes an orifice having a cross-sectional shape similar to a cross-sectional shape of the groove.
12. The apparatus of claim 11, wherein the rib has an inverted T-shaped cross-sectional shape.
13. The apparatus of claim 11, wherein the rib has a triangular cross-sectional shape.
14. The apparatus of claim 11, wherein the rib has a semi-circular cross-sectional shape.
15. The apparatus of claim 11, wherein the rib has an inverted Y-shaped cross-sectional shape.
16. The apparatus of claim 11, further comprising an air nozzle disposed below the extrusion die.
17. The apparatus of claim 11, wherein the roll includes a further groove that receives molten polymer wherein the positioning system places the section of plastic film in contact with the molten polymer in the further groove to form a further rib.
CA002433470A 2002-06-27 2003-06-25 Apparatus for forming a guide rib on a section of plastic film Expired - Lifetime CA2433470C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/184,431 US6994535B2 (en) 2002-06-27 2002-06-27 Method and apparatus for forming a guide rib on a section of plastic film
US10/184,431 2002-06-27

Publications (2)

Publication Number Publication Date
CA2433470A1 CA2433470A1 (en) 2003-12-27
CA2433470C true CA2433470C (en) 2007-05-01

Family

ID=29779354

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002433470A Expired - Lifetime CA2433470C (en) 2002-06-27 2003-06-25 Apparatus for forming a guide rib on a section of plastic film

Country Status (2)

Country Link
US (1) US6994535B2 (en)
CA (1) CA2433470C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8167490B2 (en) 2009-04-22 2012-05-01 Reynolds Consumer Products Inc. Multilayer stretchy drawstring
KR101753933B1 (en) 2010-03-30 2017-07-19 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Profiled extrusion replication
US8550716B2 (en) 2010-06-22 2013-10-08 S.C. Johnson & Son, Inc. Tactile enhancement mechanism for a closure mechanism
US9327875B2 (en) 2010-10-29 2016-05-03 S.C. Johnson & Son, Inc. Reclosable bag having a loud sound during closing
US8469593B2 (en) 2011-02-22 2013-06-25 S.C. Johnson & Son, Inc. Reclosable bag having a press-to-vent zipper
US8568031B2 (en) 2011-02-22 2013-10-29 S.C. Johnson & Son, Inc. Clicking closure device for a reclosable pouch
US9815238B2 (en) 2014-06-30 2017-11-14 Inteplast Group Corporation Blown film with integral profiles
US11072103B2 (en) 2017-06-26 2021-07-27 Inteplast Group Corporation Extrusion system and method for blown film with integral profiles

Family Cites Families (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA764647A (en) 1967-08-08 Kabushiki Kaisha Seisan Nihon Sha Synthetic resin film-made bag
US1746565A (en) 1926-09-22 1930-02-11 Hookless Fastener Co Separable fastener
US1959318A (en) 1927-09-22 1934-05-15 Hookless Fastener Co Separable fastener
US2354485A (en) 1942-11-02 1944-07-25 Extruded Plastics Inc Composite article and element therefor
US2916197A (en) 1957-05-06 1959-12-08 Douglas Aircraft Co Inc Compartmented container
US3340116A (en) 1960-04-11 1967-09-05 Seisan Nipponsha Kk Method and apparatus for manufacturing synthetic resin tubular film having occludentmeans in the inside surface thereof
US3038225A (en) 1960-05-27 1962-06-12 Ausnit Steven Separable fastener
GB994307A (en) 1961-11-27 1965-06-02 Seisan Nipponsha Kk Material for forming plastics bags and bags made therefrom
USRE28969E (en) 1961-11-27 1976-09-21 Kabushiki Kaisha Seisan Nihon Sha Ltd. Integral reclosable bag
US3338284A (en) 1963-07-22 1967-08-29 Ausnit Steven Sheet with fastener structure
DE1435791A1 (en) 1963-11-23 1969-02-20 Jaster Geb Krupska Margarete J Packaging or sheathing made of plastic
US3462332A (en) 1965-03-05 1969-08-19 High Polymer Chem Ind Ltd Method of continuously providing a fastener on a thermoplastic film
US3416199A (en) 1965-06-10 1968-12-17 Minigrip Inc Seal for bags
US3372442A (en) 1965-09-18 1968-03-12 High Polymer Chemical Ind Ltd Synthetic resin fastener
US3347298A (en) 1965-10-07 1967-10-17 Minigrip Inc Flexible fastener with unidirectional opening
US3371696A (en) 1965-10-22 1968-03-05 Ausnit Steven Reclosable bags with rib and groove elements formed of different materials
US3565737A (en) 1965-11-26 1971-02-23 Dow Chemical Co Composite plastic sheet and method for the preparation thereof
US3410327A (en) 1966-04-06 1968-11-12 Ausnit Steven Container having reverse profile unidirectional fastener
FR1493748A (en) 1966-07-22 1967-09-01 Flexico France Sarl Improvements to plastic zippers obtained by extrusion
US3715420A (en) 1969-07-19 1973-02-06 Sekisui Chemical Co Ltd Process for producing a thermoplastic resin sheet having a color band
DK126921B (en) 1969-08-14 1973-09-03 Seisan Nippon Sha Ltd Kk Bag closures.
USRE27174E (en) 1970-01-23 1971-09-21 Reclosable bags with rib and groove elements
BE785716A (en) 1971-06-30 1973-01-02 Flexico France Sarl MANUFACTURING PROCESS AND EXTRUSION LINE FOR A PLASTIC TUBE
US4259133A (en) * 1973-03-13 1981-03-31 Minigrip, Inc. Method and apparatus for making profile sheets
US4139664A (en) 1977-03-21 1979-02-13 Protective Treatments, Inc. Mechanical securement of extrusions
GB2008538A (en) 1977-07-22 1979-06-06 Shend Ge E A Display system
US4263079A (en) 1978-12-15 1981-04-21 The Dow Chemical Company Method of forming an integral closure for a thermoplastic container
US4268938A (en) 1979-07-23 1981-05-26 Enviropak Inc. Closure device for container
GB2058609B (en) 1979-09-13 1983-11-09 Roeder Ind Holdings Profiled plastics bag closure strip and adhesive bonding method
US4279677A (en) 1979-11-16 1981-07-21 Seissan Nippon-Sha K. K. Method of means for joining plastic fastener strip to film
US4306924A (en) 1980-03-28 1981-12-22 Union Carbide Corporation Method and apparatus for producing a plastic container having a reclosable fastener
DE3032889C2 (en) 1980-06-02 1985-12-05 Union Carbide Corp., New York, N.Y. Flat bags made of plastic film with a closure
US4363345A (en) 1980-06-02 1982-12-14 Union Carbide Corporation Reclosable container
JPS57195613A (en) 1981-05-28 1982-12-01 Seisan Nipponsha Kk Method of bonding synthetic resin fastener, having fusion-heat, to flat plate film
CA1212808A (en) 1982-03-24 1986-10-21 Gerald H. Scheibner Process and apparatus for reclosable container stock
NZ203576A (en) 1982-03-24 1986-05-09 Union Carbide Corp Reclosable plastics bag:non slip gripping edges
US4419159A (en) 1982-04-05 1983-12-06 Mobil Oil Corporation Manufacture of plastic bags with interlocking profile extrusions
US4561109A (en) 1982-10-12 1985-12-24 Mobil Oil Corporation Plastic bags with releasable closure which resists opening from inside
US4736496A (en) 1982-12-27 1988-04-12 The Dow Chemical Company Closure for thermoplastic containers
US4476180A (en) * 1983-02-01 1984-10-09 The Procter & Gamble Company Nonblocking elastomeric polymer blends of ABA block copolymer and ethylene-vinyl acetate copolymer
US4484352A (en) 1983-02-07 1984-11-20 Katzin Lawrence F Reclosable plastic bag
US4701358A (en) 1984-03-21 1987-10-20 The Dow Chemical Company Thermoplastic film with integral closures and reclosable container formed therefrom
US4562027A (en) 1984-03-21 1985-12-31 The Dow Chemical Company Process for making cast thermoplastic film with integral closures
US4676851A (en) 1984-04-25 1987-06-30 First Brands Corporation Process and apparatus for forming integral interlocking closure film stock
US4618383A (en) 1984-06-22 1986-10-21 Mobil Oil Corporation Method and apparatus for the manufacture of plastic bags having interlocking profile extrusions
US4832768A (en) * 1984-07-20 1989-05-23 Minigrip, Inc. Method of forming plastic fastener and plastic accessory strips and uniting the same with a film
US4698118A (en) 1984-07-20 1987-10-06 Minigrip, Inc. Apparatus for forming plastic fastener and plastic accessory strips and uniting the same with a film
US4812056A (en) 1985-03-25 1989-03-14 The Dow Chemical Company Reclosable, flexible container having an externally operated fastener
US4778282A (en) 1985-09-11 1988-10-18 First Brands Corporation Trident interlocking closure profile configuration
US4710968A (en) 1985-09-11 1987-12-01 First Brands Corporation Trident interlocking closure profile configuration
CA1265105A (en) 1985-09-26 1990-01-30 Dow Consumer Products Inc. Reclosable container with grip strip
US5009828A (en) 1985-09-26 1991-04-23 The Dow Chemical Company Method of forming a reclosable container with grip strip
FR2589437B1 (en) 1985-11-04 1988-06-10 Flexico France Sarl CONNECTION DEVICE BETWEEN TWO SHEETS OF PLASTIC MATERIAL; BAG EQUIPPED, FOR CLOSING SAME, WITH SUCH A DEVICE
US4796300A (en) 1985-11-08 1989-01-03 Kcl Corporation Reclosable flexible container having interior and exterior closure elements interlocked on the container walls
JPH0231603Y2 (en) 1986-02-12 1990-08-27
FR2595617B1 (en) 1986-03-17 1988-09-09 Gefrem PRESSURE CLOSURE DEVICE FOR JOINING THE EDGES OF PLASTIC TABLECLOTHS
US5056933A (en) * 1986-07-22 1991-10-15 First Brands Corporation Multiposition interlocking closure fastening device
US4741789A (en) 1986-10-20 1988-05-03 The Dow Chemical Company Apparatus and process for forming and applying a profile and adjacent rib-type zipper to a traveling film web
JPH0715289B2 (en) 1986-12-23 1995-02-22 日本精工株式会社 Tripto type constant velocity joint
US4755248A (en) 1986-12-30 1988-07-05 The Dow Chemical Company Slot-cast intergrated interlocking film closure structure
US4929487A (en) 1987-09-14 1990-05-29 Minigrip, Inc. Bag making material having fastener profiles and alignment ribs with reinforcing and stabilizing beam effect ridge means
US4822539A (en) 1987-09-14 1989-04-18 Minigrip, Inc. Method of and apparatus for extruding bag making material having fastener profiles and alignment ribs, with reinforcing and stabilizing beam effect ridge means
US4906310A (en) 1988-12-21 1990-03-06 Mobil Oil Corporation Profiled fastener assembly which is hot-extruded on a cuff film
US5002781A (en) * 1989-03-23 1991-03-26 Zip-Pak Incorporated Bacon/meat package
US5067822A (en) 1989-04-24 1991-11-26 Reynolds Consumer Products, Inc. Method of forming recloseable packages, profiles used therein, and packages produced thereby
US5238306A (en) 1989-05-19 1993-08-24 Reynolds Consumer Products, Inc. Method of producing a sealing system for a reclosable webbed-wall package, and system made
DE3937088A1 (en) 1989-11-07 1991-05-08 Asf Verwaltungsgesellschaft Mb CLOSURE FOR SEALING BAGS AND METHOD AND TOOL FOR THE PRODUCTION THEREOF
US5049223A (en) 1990-01-08 1991-09-17 Dowbrands, Inc. Use of surface active agents for improved cooling of thermoplastic film webs
US5140727A (en) 1990-03-09 1992-08-25 Dowbrands L.P. Zipper for reclosable thermoplastic bag, process and apparatus for making
US5012561A (en) 1990-05-18 1991-05-07 The Dow Chemical Company Closure for reclosable thermoplastic containers
US5092684A (en) 1991-03-04 1992-03-03 Illinois Tool Works Inc. Post-applied zipper base with grip strip
US5211481A (en) 1991-11-22 1993-05-18 Minigrip, Inc. Closure for sliderless zipper bags
US5209574A (en) 1991-11-22 1993-05-11 Minigrip, Inc. Reclosable plastic bag with sliderless zipper
US5248201A (en) 1992-02-24 1993-09-28 Reynolds Consumer Products Inc. Interlocking closure for plastic storage bags with confirming color strips
JP2593466Y2 (en) 1992-03-25 1999-04-12 ワイケイケイ株式会社 Rail fastener
US5403094A (en) 1993-10-06 1995-04-04 Reynolds Consumer Products, Inc. Reclosable zipper
US5573614A (en) * 1993-12-28 1996-11-12 Minigrip, Inc. Method for stabilizing a plastic zipper during attachment to a film
US5368394A (en) 1993-12-28 1994-11-29 Minigrip, Inc. Stabilizer wedge zipper
US5509734A (en) 1994-01-11 1996-04-23 Minigrip, Inc. Wedge activated zipper
US5577305A (en) 1995-05-08 1996-11-26 Johnson; James R. Fastener assembly
US6080252A (en) 1997-10-06 2000-06-27 Illinois Tool Works Inc. Zipper component and method for forming same
CA2272675A1 (en) 1998-06-08 1999-12-08 Donald L. Van Erden Improved zipper for slider package
US5953796A (en) 1998-06-08 1999-09-21 Illinois Tool Works Inc. Slide zipper assembly
AUPR105600A0 (en) 2000-10-27 2000-11-23 International Consolidated Business Pty Ltd Reclosable plastic bags
US6692147B2 (en) 2001-08-24 2004-02-17 Charles Nelson Venting reclosable bags
US6686005B2 (en) 2001-10-11 2004-02-03 Pactiv Corporation End termination materials for reclosable polymeric bags

Also Published As

Publication number Publication date
US6994535B2 (en) 2006-02-07
US20040000743A1 (en) 2004-01-01
CA2433470A1 (en) 2003-12-27

Similar Documents

Publication Publication Date Title
US20040001651A1 (en) Closure device for a reclosable pouch
US4741789A (en) Apparatus and process for forming and applying a profile and adjacent rib-type zipper to a traveling film web
US4756629A (en) System for producing non-compatible zipper film
US20040078938A1 (en) Closure device for a reclosable pouch
US6860952B2 (en) Method for laminating closure member to film web
US7137736B2 (en) Closure device for a reclosable pouch
US20040234173A1 (en) Closure device for a reclosable pouch
AU602548B2 (en) Method and apparatus for producing a reclosable bag film
US5318657A (en) Drip irrigation tape and method of manufacture
US20120087602A1 (en) Reclosable container and method of manufacture
CA2433470C (en) Apparatus for forming a guide rib on a section of plastic film
US4629524A (en) Making reclosable bag material
EP1628886A2 (en) Closure device for a reclosable pouch
US20040238995A1 (en) Extrusion die and method for using the same
CA2508910A1 (en) Method of and apparatus for forming multiple closure elements
US20040256761A1 (en) Method of and apparatus for producing a reclosable pouch
EP0208240B1 (en) Method and apparatus for extruding a fastening profile onto a travelling film web
US20030236158A1 (en) Method of and apparatus for producing a reclosable pouch
WO2004037665A1 (en) Closure device for a reclosable pouch
EP1318007A2 (en) Method for manufacturing a resealable bag
CA1060620A (en) Forming and cooling extruded profile film

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20230627