US3790992A - Profiled closing members with slide - Google Patents

Profiled closing members with slide Download PDF

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Publication number
US3790992A
US3790992A US00263792A US3790992DA US3790992A US 3790992 A US3790992 A US 3790992A US 00263792 A US00263792 A US 00263792A US 3790992D A US3790992D A US 3790992DA US 3790992 A US3790992 A US 3790992A
Authority
US
United States
Prior art keywords
slider
sheets
edge
bag
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
US00263792A
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English (en)
Inventor
A Herz
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
Minigrip 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 Minigrip Inc filed Critical Minigrip Inc
Application granted granted Critical
Publication of US3790992A publication Critical patent/US3790992A/en
Anticipated expiration legal-status Critical
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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
    • B65D33/2584—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 characterized by the slider
    • B65D33/2586—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 characterized by the slider being provided with a separating plow
    • B65D33/25865—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 characterized by the slider being provided with a separating plow reaching between the interlocking fastener profiles
    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/26—Sliders
    • A44B19/267—Sliders for slide fasteners with edges of stringers having uniform section throughout the length thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1054—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing and simultaneously bonding [e.g., cut-seaming]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y10T24/2532—Zipper or required component thereof having interlocking surface with continuous cross section
    • Y10T24/2534—Opposed interlocking surface having dissimilar cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y10T24/2561—Slider having specific configuration, construction, adaptation, or material
    • Y10T24/2582—Slider having specific configuration, construction, adaptation, or material having specific contour or arrangement of converging channel, separator island, or wing

Definitions

  • the invention relates to improvements in fasteners for plastic bags or the like wherein the fasteners include releasably interlocking rib and groove elements with a slider for opening or closing the rib and groove elements. More particularly, the invention relates to an improved structure which limits the travel of the slider in its movement in an opening direction so that it does not wedge or stick and does not come off the end of the fastener strips.
  • releasably interlocking rib and groove elements extend along the top of the bag from a first edge to a second edge.
  • the rib and groove elements are on the inside facing surfaces of the sheets of the bag and a straddling slider moves along the top of the bag.
  • the straddling slider has a back and sides which extend along the outside of the rib and groove elements, and the sides are closer together at a closing end of the slider so that the rib and groove elements are pressed into interlocking relationship as the slider moves from the first to the second edge of the bag.
  • the sides are further apart and a finger extends down between the slides for separating the interlocking rib and groove elements as the slider is moved from the second to the first edge of the bag.
  • the only thing to stop the slider in structures heretofore available is the seam at the edge of the bag, and when the slider finger comes into contact with it, most of the slider body is already off of the bag and, therefore, can easily be twisted off. If not twisted off, it may wedge or jam or become cocked or twisted so that it is not easy to start it and move it back in the direction to close the bag.
  • Another object of the invention is to provide an improved method for manufacturing a series of bags providing bag structures of the type above described wherein structures are made by a minimum of steps for rapid and efficient manufacture resulting in a reduction of cost.
  • FIG. 1 is an elevational view of bags constructed and manufactured in accordance with the principles of the present invention
  • FIG. 2 is a vertical sectional view taken substantially along line II-II of FIG. 1;
  • FIG. 3 is a vertical sectional view taken substantially along line III-III of FIG. 1;
  • FIG. 4 is a fragmentary end elevational view taken substantially along line IVIV of FIG. 1;
  • the structure includes flexible plastic bags formed of plastic sheets 1 and 2. These sheets form a bag 3 which has a top edge 27, and a first side edge 28 and a second side edge 29.
  • fastener means which include flexible rib and groove elements with the rib 6 being sized and shaped to be releasably interlockable in the groove 5 of a groove element 4.
  • the rib and groove elements are formed of plastic as are the sheets 1 and 2 which form the walls of the bag, and in one form these elements may all be formed in a single extrusion method by being extruded from a plastic die. While the rib and groove elements are shown as being integral with the sheets, it will be understood that the features of the invention will also apply to separate closure strips which have rib and groove elements and which are attached to sheets.
  • a straddling slider 7 is positioned at the top edge of the bag.
  • the slider has a back 8 which slides along the top edge and sides 9 and 10 mounted on the back that extend downwardly along the outer surfaces of the rib and groove elements.
  • the slider has a closing end 11 and an opening end 12 with the closing end extending toward the first edge 28 and the opening end extending toward the second edge 29.
  • the sides 9 and 10 are sufficiently close together so that they press the rib and groove elements into interlocking position. This will occur as the slider is moved in a closing direction from the first edge 28 to the second edge 29.
  • a separating finger 13 is mounted on the back 8 and extends down between the sides 9 and 10. The finger forces the rib and groove elements apart to open the top of the bag, and the sides 9 and 10 are wider spaced at the opening end to permit this separation of the rib and groove elements.
  • Means are provided for holding the slider 7 in its straddling position at the top edge of the bag.
  • One of these means are shown by the upwardly facing shoulders 14 and 15 at the lower edges of the side walls. These shoulders are locked beneath the bulges formed on the outer surfaces of the sheets 1 and 2 by the rib and groove elements 4 and 5.
  • the slider is also held onto the top of the bag by shoulders formed by an enlarged head 16 at the lower end of the separating finger 13. These shoulders lock beneath the rib and groove element and also thus lock the slider in its straddling position onto the top edge of the bag.
  • the slider will be held onto the top edge of the bag in all positions. However, if the slider could be pulled off of the end of the bag, such as moving too far to the right toward the first edge 28 in FIG. 1, it could twist upwardly and wedge or jam or be lifted fully off of the top edge of the sheets.
  • a stop 18 is provided which is engaged by the separating finger 13 as the slider is moved to the edge of the bag to limit the travel of the slider to traveling no further than the position shown in FIG. I.
  • the stop 18 is preferably in the form of a cross-seal joining the rib and groove elements which prevents them from separating.
  • the stop may be provided by a seal created by ultrasonic welding or by the application of a heated instrument to join the rib and groove elements, but an important feature of its construction is its location. That is, it extends inwardly from the first edge 28 a distance shown at X which is at least the length of the slider from its closing end 11 to the inner surface 21 of the separating finger 13.
  • the bags are formed from a front sheet which becomes the front wall 1 of the bag and a continuation of said front sheet that is folded under itself to become the rear wall 2 of the bag 32 of FIG. 1. These sheets are continuous and have at their top edge the fastener means comprised of the rib and groove elements and 6.
  • cross-seals are made which form the side edges of the bags. As shown in FIG. 5, the bags have their crossseals made so as to form a first side edge 28 of the bag 32 and a second side edge 25 of the bag 31. Individual bags are severed from each other along line 23.
  • the cross-sealing and severing is accomplished either in a single operation by using a hot wire that seals and cuts or in two operations by the application of a broader heated sealing bar which is then cut through its center by a knife.
  • the stop 18 is formed such as by ultrasonic sealing.
  • the provision of a stop is provided for successive bags as shown by the sealed areas 26 and 36. Stop 26 extends a greater distance into the second bag 32 than into the first bag 31. That is, the portion 26b of the seal 26 is narrower than the portion 26a. Portion 26b provides the stop for the slider 35 at the end of its travel when it closes the bag 31. Portion 26a provides the stop for the slider 7 at the end ofits travel when it opens the bag 32.
  • the slide 7 is formed of suitable material such as being molded from relatively hard plastic.
  • the slide may be positioned by various methods such as by having its walls forcibly separated and pushed into its straddling position over the top of the bag. While the method of FIG. 5 shows the simultaneous manufacturing of a number of bags, the end seals at the first and second edges of the bag can be placed on the bags at a separate time.
  • the bonding or welding of the edges of the bags and the formation of the stop can be formed by various types of equipment and can utilize the method of ultrasonic welding with the aid of electrodes or heads, one type of which is known to the art as sonotrode.
  • a reclosable fastener structure for releasably joining the top edges at the opening of a bag or the like comprising in combination,
  • a straddling slider for joining or releasing the separable fasteners having a back for moving along the top edges of the fasteners with sides projecting from the back and extending from an opening end of the slider to a closing end, said sides being spaced wider apart at the opening to permit separation of the rib and groove elements and being spaced sufficiently close together at the closing end to press the rib and groove elements into interlocking relationship as the slider is moved in a fastener closing direction toward the second edge of the sheets,
  • a separating finger on the slider extending between the sides at said opening end for separating the rib and groove element as the slider is moved in a fastener opening direction toward the first edge of the sheets
  • a reclosable fastener structure for releasably joining the top edges at the opening of the top of a bag or the like comprising,
  • first and second pairs of flexible plastic sheets each pair having a top edge and first and second side edges with the second edge of the first pair being adjacent the first edge of the second pair of sheets and the sheets having separable fastener means at the top edge with releasably interlocking rib and groove elements on the facing surfaces thereof, straddling slider for each pair of sheets for joining and releasing the top edges with the slider having a back for sliding along the top edges and sides projecting therefrom and extending from an opening end of the slider to a closing end, the sides of said slider being spaced wider apart at the opening end to permit separation of the rib and groove elements and being spaced sufficiently close together at the closing end to press the rib and groove elements into interlocking relationship as the slider is moved from the first to the second edge of the sheets, separating finger on the slider extending between the sides at said opening end for separating the rib and groove elements as the slider is moved toward the first edge of the sheets, heat seal means joining two sheets of each pair to each other at the second top edge of the first pair and the first top

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Slide Fasteners (AREA)
US00263792A 1971-06-30 1972-06-19 Profiled closing members with slide Expired - Lifetime US3790992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7123942A FR2144100A5 (enrdf_load_stackoverflow) 1971-06-30 1971-06-30

Publications (1)

Publication Number Publication Date
US3790992A true US3790992A (en) 1974-02-12

Family

ID=9079616

Family Applications (1)

Application Number Title Priority Date Filing Date
US00263792A Expired - Lifetime US3790992A (en) 1971-06-30 1972-06-19 Profiled closing members with slide

Country Status (6)

Country Link
US (1) US3790992A (enrdf_load_stackoverflow)
BE (1) BE785713A (enrdf_load_stackoverflow)
FR (1) FR2144100A5 (enrdf_load_stackoverflow)
GB (1) GB1392642A (enrdf_load_stackoverflow)
HK (1) HK34080A (enrdf_load_stackoverflow)
LU (1) LU65617A1 (enrdf_load_stackoverflow)

Cited By (121)

* Cited by examiner, † Cited by third party
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BE785713A (fr) 1973-01-02
HK34080A (en) 1980-07-01
GB1392642A (en) 1975-04-30
FR2144100A5 (enrdf_load_stackoverflow) 1973-02-09

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