WO2000076339A1 - Dispositif de fermeture - Google Patents

Dispositif de fermeture Download PDF

Info

Publication number
WO2000076339A1
WO2000076339A1 PCT/US1999/013111 US9913111W WO0076339A1 WO 2000076339 A1 WO2000076339 A1 WO 2000076339A1 US 9913111 W US9913111 W US 9913111W WO 0076339 A1 WO0076339 A1 WO 0076339A1
Authority
WO
WIPO (PCT)
Prior art keywords
closure
slider
separator finger
web
distance
Prior art date
Application number
PCT/US1999/013111
Other languages
English (en)
Inventor
Michael G. Borchardt
Jeffrey S. Stiglic
Original Assignee
The Glad Products Company
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 The Glad Products Company filed Critical The Glad Products Company
Priority to PCT/US1999/013111 priority Critical patent/WO2000076339A1/fr
Priority to AU45592/99A priority patent/AU4559299A/en
Publication of WO2000076339A1 publication Critical patent/WO2000076339A1/fr

Links

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
    • 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
    • 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

Definitions

  • the present invention pertains to an interlocking closure device, and, more particularly, to a closure device with a slider.
  • the closure device of the present invention may be employed in traditional fastener areas, and is particularly suited for use as a fastener for storage containers, such as plastic bags.
  • fastening devices for the closure of containers, including plastic bag bodies, is generally known. Furthermore, the manufacture of fastening devices made of plastic materials is generally known to those skilled in the art relating to closure devices, as demonstrated by the numerous patents in this area.
  • a particularly well-known use for fastening devices is in connection with flexible containers, such as bag bodies.
  • the closure device and the associated container may be formed from thermoplastic materials, and the closure device and sidewalls of the container can be integrally formed by extrusion as a single piece. Alternatively, the closure device and sidewalls may be formed as separate pieces and then connected by heat sealing or any other suitable connecting process.
  • the closure devices when incorporated as fasteners on bag bodies have been particularly useful in providing a closure means for retaining the contents within the bag body.
  • closure devices utilize mating male and female closure elements which are occluded.
  • the female member of the closure may be opaque yellow and the male member of the closure may be translucent blue. Upon occlusion of the male member and female member a composite color with a green hue results. This use of a color change greatly improves the ability of the user of the interlocking closure device to determine when the male and female members are occluded.
  • U.S. Patents 4,736,496, 5,138,750, 5,140,727, 5,403,094, and 5,405,478, as well as EP 510,797 disclose closure devices that allegedly provide a factually or audibly perceptive indication of proper interlocking of the closure elements. It is said that, upon occlusion of the disclosed closure devices, a user is able to feel or hear that full closure is accomplished.
  • U.S. Patent 4,736,946 discloses the use of additional ribs on either side of the closure elements.
  • fasteners which use a separator finger which extends between the closure elements do not provide a leak proof seal because the separator finger extends between the closure elements.
  • the fastener typically include slits, notches or another means to accommodate the separator finger in the end position. These means are used to achieve occlusion of the closure elements at the end position and thus attempt to achieve a leak proof seal.
  • U.S. Patents 5,020,194, 5,067,208, 5,088,971, 5,131,121, 5,161,286, 5,301,394, 5,301,395, and 5,442,837 use a slit, notch or other means to accommodate the separator finger in the end position. These means in the fasteners create additional steps in the manufacturing process and thus may increase the cost of these fasteners.
  • the structure below the interlocking elements and/or the slider may be difficult to extrude or manufacture. If the tolerances are incorrect, the slider may not move smoothly or fail to open or close the fastener elements. Thus, it would be difficult to achieve a properly functioning fastener.
  • the present invention satisfies these general objects by providing a closure device with interlocking fastening strips and a slider which establishes a leak proof seal.
  • the closure device comprises first and second interlocking fastening strips arranged to be interlocked over a predetermined length and a slider with a separator finger which slidably engages said first and second fastening strips.
  • the first fastening strip includes a first closure element and the second fastening strip includes a second closure element.
  • the slider facilitates the occlusion of the closure elements when moved towards a first end of the fastening strips and deocclusion of the closure elements when moved towards a second end of the fastening strips.
  • the separator finger extends into the closure elements without extending completely through the closure elements. The portion of the closure elements below the separator finger are occluded when the slider is at the first end of the fastening strips.
  • Fig. 1 is a perspective view of a container according to the present invention in the form of a plastic bag.
  • Fig. 2 is an enlarged partial top view of the container in Fig. 1.
  • Fig. 3 is an enlarged partial cross-sectional view taken along line 3-3 in Fig. 2.
  • Fig. 4 is a front view of the slider in Fig. 2.
  • Fig. 5 is a rear view of the slider in Fig. 2.
  • Fig. 6 is a bottom view of the slider in Fig. 2.
  • Fig. 7 is a cross-sectional view taken along line 7-7 in Fig. 4.
  • Fig. 4A is a front view of another embodiment of the slider.
  • Fig. 5A is a rear view of the slider in Fig. 4A.
  • Fig. 6A is a bottom view of the slider in Fig. 4A.
  • Fig. 7A is a cross-sectional view taken along line 7A-7A in Fig. 4A.
  • Fig. 8A is a cross-sectional view taken along line 8A-8A in Fig. 4A.
  • Fig. 8 is an enlarged partial cross-sectional view taken along line 8-8 in Fig. 2.
  • Fig. 9 is an enlarged partial cross-sectional view taken along line 9-9 in Fig. 2.
  • Fig. 10 is an enlarged partial cross-sectional view taken along line 10-10 in Fig. 2.
  • Fig. 11 is an enlarged partial cross-sectional view taken along line 11-11 in Fig. 2.
  • Fig. 12 is an enlarged partial cross-sectional view taken along line 12-12 in Fig. 2.
  • Fig. 13 is an enlarged partial cross-sectional view taken along line 13-13 in Fig. 2.
  • Fig. 14 is an enlarged partial top view of the container shown in Fig. 1 with the slider in the end position and the fastening strips in the occluded position.
  • Fig. 15 is an enlarged cross sectional view taken along line 15-15 in Fig. 14.
  • Fig. 16 is an enlarged cross sectional view taken along line 16-16 in Fig. 14.
  • Fig. 17 is an enlarged cross sectional view taken along line 17-17 in Fig. 14.
  • Fig. 18 is an enlarged cross sectional view taken along line 18-18 in Fig. 14.
  • Fig. 19 is an enlarged cross sectional view taken along line 19-19 in Fig. 14.
  • Fig. 20 is an enlarged cross sectional view taken along line 20-20 in Fig. 14.
  • Fig. 21 is a front view of another embodiment of the closure device according to this invention showing a notch in the fastening strips.
  • Fig. 22 is a partial front view of the closure device in Fig. 21.
  • Fig. 23 is a cross-sectional view taken along the line 23-23 in Fig. 22.
  • Fig. 24 is a front view of another embodiment of the closure device according to this invention showing a slit in the fastening strips.
  • Fig. 25 is a partial front view of the closure device in Fig. 24.
  • Fig. 26 is a cross-sectional view taken along the line 26-26 in Fig. 25.
  • Fig. 27 is a cross-sectional view of another embodiment of the closure device according to this invention in a deoccluded position.
  • Fig. 28 is a cross-sectional view of the closure device in Fig. 27 in an occluded position.
  • Fig. 29 is a cross-sectional view of another embodiment of the closure device according to this invention in a deoccluded position.
  • Fig. 30 is a cross-sectional view of the closure device in Fig. 29 in an occluded position.
  • Fig. 31 is a cross-sectional view of another embodiment of the closure device according to this invention in a deoccluded position.
  • Fig. 32 is a cross-sectional view of the closure device in Fig. 31 in the occluded position.
  • Fig. 33 is a cross-sectional view of another embodiment of the closure device according to this invention in a deoccluded position.
  • Fig. 34 is a cross-sectional view of the closure device in Fig. 33 in an occluded position.
  • Fig. 35 is a front view of another embodiment of the container according to the present invention in the form of a plastic bag.
  • Fig. 36 is a partial front view of the slider of Fig. 35 in the end position.
  • Fig. 37 is a top view of Fig. 36 with the slider in the end position and the fastening strips in the occluded position .
  • Fig. 38 is an enlarged cross sectional view taken along line 38-38 in Fig. 37.
  • Fig. 39 is an enlarged cross sectional view taken along line 39-39 in Fig. 37.
  • Fig. 40 is an enlarged cross sectional view taken along line 40-40 in Fig. 37.
  • Fig. 41 is an enlarged cross sectional view taken along line 41-41 in Fig. 37.
  • Fig. 42 is an enlarged cross sectional view taken along line 42-42 in Fig. 37.
  • Fig. 43 is an enlarged cross sectional view taken along line 43-43 in Fig. 37.
  • Fig. 44 illustrates a slider according to the present invention.
  • Fig. 45 illustrates a slider according to the present invention.
  • Fig. 46 illustrates a cross sectional view taken along line 46-46 in Fig. 44 of a slider according to the present invention.
  • Fig. 47 illustrates a female fastening strip of a closure device according to the present invention.
  • Fig. 48 illustrates a male fastening strip of a closure device according to the present invention.
  • the present invention provides interlocking closure devices with a slider which establishes a leak proof seal.
  • the terms “male” and “female” closure elements refer to closure elements wherein the element that interlocks into the other closure element is referred to as the “male closure element” and the outer element is referred to as the “female closure element”.
  • Fig. 1 illustrates a container according to the present invention in the form of a plastic bag 120 having a sealable closure device 121.
  • the bag 120 includes side walls 122 joined at seams 125 to form a compartment sealable by means of the closure device 121.
  • the closure device comprises male and female fastening strips 130, 131 and a slider 132.
  • the female fastening strip 131 includes a female closure element 134.
  • the male fastening strip 130 comprises a male closure element 136 for engaging the female closure element 134, and further may include a pair of male wings 137 spaced-apart on the male fastening strip on each side of the male closure element 136.
  • the female closure element 134 may include a base portion 138 and may include a pair of spaced-apart parallely disposed webs 140, 141 extending from the base portion 138.
  • the webs 140, 141 may include female hook closure portions 142, 144 extending from the webs 140, 141 respectively, and facing towards each other.
  • the female hook portions 142, 144 may include guide surfaces 146, 147 which serve to guide the hook portions 142, 144 for occluding with the male hook portions of a mating closure element .
  • the male closure element 136 may include a base portion and may include a pair of spaced-apart, parallely disposed webs 150, 151 extending from the base portion 148.
  • the webs 150, 151 may include male hook closure portions 152, 154 extending from the webs 150, 151 respectively and facing away from each other.
  • the male hook portions 152, 154 may include guide surfaces 145, 155, which generally serve to guide the hook portions 152, 154 for occlusion with the female hook portions 142, 144 of the mating female closure element.
  • the guide surface 145 may also have a rounded crown surface.
  • the hook portions may be designed so that the hook portions 144, 154 adjacent the interior of the container provide a greater resistance to opening of the closure device.
  • the male fastening strip may include wings as shown in Fig. 3.
  • the male wings 137 are flexible and extend from the base of the fastening strip. Each wing terminates in an end portion 143 which projects outwardly from the wing 137.
  • the fastening strip may also include a color change enhancement member 156.
  • the slider 132 may include a top portion 170, a separator finger 172, a first side portion 174, a second side portion 176, a bottom portion 178 and a slot 180.
  • the separator finger 172 extends downward from the top portion 170 toward the slot 180.
  • the slider 132 has a first end 184 and a second end 186.
  • the separator finger 172 extends from the second end 186 towards the first end 184.
  • the separator finger has a first end 190 and a second end 192 which correspond with the first end 184 and second end 186 of the slider.
  • the first end 190 has a rounded surface 194 and the second end 192 has two corners or edges 196, 198.
  • the separator finger 172 has a first side portion 214 which corresponds to the first side portion 174, a second side portion 216 which corresponds to the second side portion 176, and a bottom portion 218 which corresponds with bottom portion 178.
  • the top portion 170 of the slider has an inner surface 220 and an outer surface 222.
  • the width 226 of the top portion 170 tapers and becomes smaller beginning at the second end 186 and moving towards the first end
  • the bottom portion 178 of the slider has an inner surface 230 and an outer surface 232.
  • the width 234 of the bottom portion 178 tapers and becomes smaller beginning at the second end 186 and moving towards the first end 184.
  • the first side portion 174 has an inner surface 240 and an outer surface 242.
  • the first side portion 174 is angled inwardly toward the longitudinal axis 246 of the slider beginning at the second end 186 and moving toward the first end 184.
  • the second side portion 176 has an inner surface 248 and an outer surface 250.
  • the second side portion 176 is angled inwardly toward the longitudinal axis 246 of the slider beginning at the second end 186 and moving toward the first end 184.
  • the bottom portion 178 has a slot 180 which extends from the outer surface 232 to the inner surface 230.
  • the slot extends from the first end 184 to the second end 186 of the slider.
  • the slot has substantially the same width from the first end 184 to the second end 186 of the slider.
  • FIG. 4A-7A Another embodiment of the slider is shown in Figs. 4A-7A.
  • This slider is similar to the slider in Figs. 4-7 except the separator finger has a different shape.
  • the slider 132A has a separator finger 172A with a triangular shape.
  • the separator finger 172A has a first end 190A and a second end 192A.
  • the first end 190A has a rounded surface 194A and the second end 192A has two corners or edges 196A, 198A.
  • the second end 192A is wider than the first end 190A.
  • the separator finger 172A has a first side portion 5 214A and a second side portion 216A.
  • the side portions 214A, 216A taper inward beginning at the second end 192A and moving towards the first end 190A as shown in Figs. 6A and 7A.
  • the separator finger 172A has a triangular shape as shown in Fig. 6A.
  • the separator finger 172A has a bottom portion 218A and a top portion 219A.
  • the top portion 219A is wider than the bottom portion 218A.
  • the first side portion 214A and the second side portion 216A taper inward beginning at the top portion
  • the separator finger 172A has a triangular shape as shown in Fig. 4A.
  • the second end 192A of the separator finger has a height 224A from the top portion
  • the first end 190A has a height which may be less than the height of the second end.
  • the separator finger 172A decreases in height 224A along the length of the separator finger from the second end 192A to first end 190A.
  • the separator finger 172A has a triangular shape as
  • the height, the width, the length and the separation of the sides of the separator finger may be constant or may vary on the separator finger, either individually or in any combination.
  • the width may be constant but the height decreases.
  • the height may be constant, but the width decreases.
  • the slider may be a one piece construction or may include several separate pieces which are assembled in several different ways.
  • Figs. 8-13 illustrate occlusion and deocclusion of the closure device.
  • Figs. 8-13 illustrate occlusion of the fastening strips.
  • Figs. 8-13 are viewed in reverse numerical sequence (i.e. viewed from Fig. 13 backwards to Fig. 8)
  • Figs. 13-8 illustrate deocclusion of the fastening strips.
  • the occlusion of the fastening strips will be described and then the deocclusion of the fastening strips will be described.
  • the slider 132 facilitates the occlusion of the fastening strips 130, 131 by moving the fastening strips towards each other and causing the closure portions to engage.
  • closure portions engage in a sequential fashion with the inner closure portions 144, 145 engaging first and then the outer closure portions 142, 152 engaging second.
  • the slider 132 is moved in the occlusion direction 280 and the fastening strips 130, 131 enter the slider 132 as shown in Fig. 8.
  • the fastening strips 130, 131 are deoccluded and the separator finger 172 is positioned between closure portions 142, 152.
  • the inner surface 240 of the first side portion and the inner surface 248 of the second side portion are separated by a width 260.
  • the slider causes the fastening strips to move closer together as shown in Fig. 9.
  • the fastening strips 130, 131 are deoccluded and the separator finger 172 is positioned between closure portions 142, 152.
  • the inner surface 240 and the inner surface 248 are closer together than in Fig. 8 and are separated by a width 262 which is less than width 260 in Fig. 8.
  • the inner surfaces 240, 248 are beginning to engage the side walls 122 and thus the fastening strips 130, 131.
  • the slider continues to move along the fastening 5 strips in the occlusion direction 280 as shown in Fig. 2, the slider continues to cause the fastening strips to move closer together as shown in Fig. 10.
  • the fastening strips 130, 131 are deoccluded but the separator finger 172 is not between the closure portions
  • the fastening strips are effected not only by the forces acting upon them by the slider at that location but are also effected by the position of the fastening strips at locations before and after that location.
  • the positions of the fastening strips in Fig. 9 are
  • the structure of the fastening strips and the material from which the fastening strips are made For example, if the base of the fastening strips are relatively thick, then the effect at other locations would be greater than if the base was relatively thin.
  • the inner surface 240 and the inner surface 248 are closer together than in Fig. 9 and are separated by a width 264 which is less than width 262 in Fig. 9.
  • the inner surfaces 240, 248 are engaging the sidewalls 122 and thus the fastening strips 130, 131.
  • the 5 inner surfaces 240, 248 are applying forces to the fastening strips which causes the fastening strips to move closer together.
  • the inner closure portions 144, 154 are closer to each other than the outer closure portions 142, 152 due to the separating action of the separator finger
  • the inner closure portions 144, 154 have occluded. More specifically, the male hook portion 154 has engaged the female hook closure portion 144. As the slider applies forces to the fastening strips, the female web 141 deflects outwardly and the male web 151 deflects inwardly
  • hook closure portions may also deflect during this process.
  • the guide surfaces 145, 147 serve to guide the hook portion 154 for occluding with hook portion 144.
  • the slider 132 continues to apply forces, the female hook portion 144 engages the male hook portion 154 as shown in Fig. 11.
  • the outer closure portions 142, 152 occlude as the guide surfaces 146, 155 and the hook portions 142, 152 engage each other as shown in Figs. 11
  • the inner surfaces 240, 248 are closer together than in Fig. 10 and are separated by a width 266 which is less than width 264 in Fig. 10.
  • the inner surfaces 240, 248 are engaging the sidewalls 122 and thus the fastening strips 130, 131.
  • the inner surfaces 240, 248 are applying forces to the fastening strips which causes the fastening strips to move closer together.
  • the slider continues to cause the fastening strips to move closer together as shown in Fig. 12.
  • the fastening strips 130, 131 are occluded.
  • the guide surfaces 146, 155 and the hook portions 142, 152 engaged each other as noted above.
  • the inner surfaces 240, 248 are closer together in Fig. 12 as compared to Fig. 11 and are separated by a width 268 which is less than width 266 in Fig. 11.
  • 15 inner surfaces 240, 248 apply forces to the fastening strips which causes the fastening strips to move closer together.
  • the fastening strips 130, 131 are moved toward each other so that a space is temporarily created between the hook closure portions 142, 144, 152, 154 to assure that the hook closure portions have fully engaged. After the fastening strips exit the
  • the slider 132 facilitates the deocclusion of the fastening strips 130, 131 by moving the fastening strips away from each other and causing the webs to disengage.
  • the webs disengage in a sequential fashion with the outer webs 140, 150 disengaging first and then the inner webs 141, 151 disengaging second.
  • the slider causes the fastening strips to move away from each other as shown in Fig. 12.
  • the inner surfaces 240, 248 are separated by a width 268 which is greater than the width 270 in Fig. 13.
  • the positions of the fastening strips are effected not only by the forces acting upon them by the slider at that specific location, but are also effected by the position of the fastening strips at locations before and after that specific location.
  • the fastening strips 130, 131 are being urged against the inner surfaces 240, 248 due to the separating action of the separating finger 172 as shown in Figs. 8-9.
  • the slider continues to cause the fastening strips to move away from each other as shown in Fig. 11.
  • the inner surfaces 240, 248 are separated by a width 266 which is greater than the width 268 in Fig. 12.
  • the outer closure portions 142, 152 have deoccluded.
  • the outer closure portions deocclude due to the separating action of the separating finger 172 as shown in Figs. 9 and 10 and because the width 266 of the inner surfaces 240, 248 allows the fastening strips 130, 131 to move further apart and thus permit -the outer closure portions 142, 152 to deocclude.
  • the inner surfaces 240, 248 are separated by a width 264 which is greater than the width 266 in Fig. 11.
  • the inner closure portions have deoccluded.
  • the inner closure portions 144, 154 deocclude due to the separating action of the separating finger 172 as shown in Figs. 9 and 10 and because the width 264 of the inner surfaces 240, 248 allows the fastening strips 130, 131 to move further apart and thus permit the inner closure portions 144, 154 to deocclude.
  • the inner surfaces 240, 248 are separated by a width 262 which is greater than the width 264 in Fig. 10.
  • the separator finger 172 engages the outer closure portions 142, 152 and causes the outer closure portions to separate and move outward towards the inner surfaces 240, 248.
  • the separator finger 172 has a rounded surface 194 which facilitates the engagement between the separator finger 172 and the outer closure portions 142, 152.
  • the fastening strips 130, 131 move outwards until the inner surfaces 240, 248 resist any further outward movement.
  • the slider permits further separation or deocclusion of the fastening strips.
  • the inner surfaces 240, 248 are separated by a width 260 which is greater than the width 262 in Fig. 9.
  • the fastening strips 130, 131 move outwards until the inner surfaces 240, 248 would resist any further outward movement.
  • the inner closure portions 144, 154 and the outer closure portions 142, 152 of the fastening strips 130, 131 are deoccluded when the fastening strips exit the slider 132.
  • the invention provides two fastening strips and a slider with a separator finger wherein the separator finger extends into the closure elements without extending completely through the closure elements.
  • the first closure element includes a first closure portion and a second closure portion and the second closure element includes a third closure portion and a fourth closure portion.
  • the first closure portion engages the third closure portion and the second closure portion engages the fourth closure portion.
  • the separator finger extends between the first and third closure portions but not between the second and fourth closure portions .
  • Fig. 14 shows the slider 132 in the end position of the fastening strips 130, 131 near the seam 125.
  • Figs. 15-20 illustrate occlusion of the fastening strips in the end position.
  • these figures demonstrate that the closure device will have a leak proof seal when the slider is in the end position. The leak proof seal is created even though the separator finger extends between the outer closure portions.
  • the occlusion and deocclusion of the outer closure portions 142, 152 is substantially similar to the occlusion and deocclusion of the outer closure portions in Figs. 8-13. Furthermore, the movement of the inner closure portions 144, 154 in Figs. 18-20 would be substantially the same as the movement of the inner closure portions 144, 154 in Figs. 11-13.
  • the movement of the inner closure portions 144, 154 in Figs. 15-17 is different than the movement of the inner closure portions 144, 154 in Figs. 8-10.
  • the positions of the fastening strips are effected not only by the forces acting upon them by the slider at that location but are also effected by the position of the fastening strips at locations before and after that location.
  • the position of the inner closure portions 144, 154 in Figs. 15-17 is effected by the seam 125 at the end of the fastening strips. At the seam 125, the fastening strips 130, 131 are melted together which effectively occludes the fastening strips.
  • the slider 132 in the occlusion direction 280 as shown in Fig. 14, the slider would occlude the fastening strips 130, 131 in the sequence shown in Figs. 15-20.
  • the inner closure portions 144, 154 of the fastening strips would usually be deoccluded as shown in Figs. 8-10.
  • the slider is prevented from further movement in the occlusion direction 280 when the separator finger 172 contacts the seam 125 as shown in Fig. 14.
  • the seam 125 causes the inner closure portions 144, 154 to be occluded at the locations in Figs. 15-17 even when the slider is not present.
  • the slider may also provide an additional seal.
  • the slider 132 includes a slot 180 at the bottom of the slider and which extends along the length of the slider. As shown in Fig. 15 the sidewalls 122 of the bag extend from the fastening strips 130, 131 and downward through the slot 180.
  • the slot 180 includes a first face
  • the width 284 is small enough to cause a seal between the sidewalls 122 near the location of the faces 286, 288 and large enough to allow the slider to move along the sidewalls 122 without making the slider too
  • the slot 180 provides an additional seal along the length of the slider.
  • the fastening strips may also achieve a position at any angle to the vertical when the fastening strips are within the slider. Specifically, referring to Fig. 9, the
  • fastening strips 130, 131 are at angles 290, 292 to the vertical plane.
  • the fastening strips are at an angle for several reasons.
  • the separator finger 172 is acting upon the outer closure portions 142, 152 to separate the closure portions.
  • the slot 180 is
  • the fastening strips 130, 131 are at an angle to the vertical.
  • the inner surfaces 240, 248 could be positioned on an angle to substantially match the angle of the fastening strips at various locations within the slider.
  • the slider is attached to the fastening strips so that the slider may move in the longitudinal X axis but not in the transverse Y axis and not in the vertical Z axis.
  • the slot 180 and the bottom portion 178 form shoulders which assist in retaining the slider 132 on the fastening strips 130, 131.
  • the inner surfaces 220, 230, 240, 248 enclose the fastening strips 130, 131.
  • the width 284 of the slot 180 does not permit the passage of the fastening strips 130, 131. Therefore, a user should not be able to remove the slider 132 from the fastening strips 130, 131 by pulling in an upward direction with respect to Fig. 15.
  • the sidewalls 122 and/or the fastening strips 130, 131 engage the inner surfaces 220, 230, 240, 248 and act as guides for the sliding movement of the slider 132 along the fastening strips.
  • the slider may be used without an additional end stop on the fastening strips.
  • the slider is prevented from further movement in the occlusion direction 280 when the separator finger 172 contacts the seam. Therefore, the slider may be used without an additional end stop on the end of the fastening strips.
  • the slider may be used with additional end stops, such as, the end stops shown in U.S. Patents 5,067,208, 5,088,971, 5,131,121, 5,161,286, 5,189,764, 5,405,478, 5,442,837, 5,448,807 and 5,482,375 which are incorporated herein by reference.
  • the fastening strips and/or the slider may also include a structure to provide a home or parking position for the slider at the end of the fastening strips, such as, the structure shown in U.S. Patents 5,067,208, 5,189,764, 5,301,394 and 5,301,395 which are incorporated herein by reference.
  • the fastening strips and/or the sidewalls of the bag may also include flanges to allow the user to open the bag more easily and insert items in the bag.
  • the flanges would extend above the webs and/or wings and the slider would be increased in height to accommodate the flanges.
  • the fastening strips and the slider may also include a structure to accommodate the separator finger at the end of the fastening strips, such as, the slits, notches and other means as shown in U.S. Patents 5,020,194, 5,067,208, 5,088,971, 5,131,121, 5,161,286, 5,301,394, 5,301,395 and 5,442,837, which are incorporated herein by reference.
  • the structure may accommodate the separator finger and thus allow the outer closure portions 142, 152 to occlude near the end of the fastening strips.
  • Figs. 21-23 illustrate another embodiment wherein the fastening strips have a notch near the seam. Referring to Fig. 21, the bag 320 has a closure device 321.
  • the bag 320 includes side walls 322 joined at seams 325 to form a compartment sealable by means of the closure device 321.
  • the closure device 321 includes first and second fastening strips 330, 331 and a slider 332.
  • the fastening strips have a notch 378 near the seam 325. As shown by dashed lines, the notch removes a portion 382 of the fastening strips 330, 331 to accommodate the separator finger 372.
  • the notch 378 permits the closure portions 344, 354 and thus, the fastening strips to occlude in the end position.
  • Figs. 24-26 illustrate another embodiment wherein the fastening strips have a slit near the seam.
  • the bag 420 has a closure device 421.
  • the bag 420 includes side walls 422 joined at seams 425 to form a compartment sealable by means of the closure device 421.
  • the closure device 421 includes first and second fastening strips 430, 431 and a slider 432.
  • the fastening strips have a slit 477 near the seam 425.
  • the slit 477 allows the fastening strips 430, 431 to accommodate the separator finger 472.
  • the slit 477 permits the closure portions 444, 454 and thus, the fastening strips to occlude in the end position.
  • Figs. 27 and 28 illustrate another embodiment of the closure device of the present invention.
  • the fastening strips 530, 531 are similar to fastening strips 130, 131 except the fastening strips 530, 531 do not include the wings 137 and the color change enhancement member 156.
  • the remaining components of the fastening strips 530, 531, such as the webs 540, 541, 550, 551 and the closure portions 540, 544, 552, 554 are similar to the components in fastening strips 130, 131.
  • Fig. 27 shows the fastening strips 530, 531 in a deoccluded position
  • Fig. 28 shows the fastening strips 530, 531 in a occluded position.
  • the occlusion and deocclusion of the fastening strips 530, 531 is similar to the occlusion and deocclusion of the fastening strips 130, 131 noted above.
  • Figs. 29 and 30 illustrate another embodiment of the closure device of the present invention.
  • the closure device includes another type of closure elements.
  • the fastening strip 630 includes a closure element 636 with closure portion 654 similar to the closure portion 154 in Fig. 3.
  • the fastening strip 631 includes a closure element 634 with a closure portion 644 similar to closure portion 144 in Fig. 3.
  • the fastening strip 630 also includes a closure portion 652 which is different from closure portion 152 in Fig. 3.
  • the fastening strip 631 also includes a closure portion 642 which is different from closure portion 142 in Fig. 3.
  • the closure portions 642, 652 are known and described in U.S.
  • Fig. 29 shows the fastening strips 630, 631 in a deoccluded position
  • Fig. 30 shows the fastening strips 630, 631 in an occluded position.
  • the occlusion and deocclusion of the fastening strips 630, 631 is similar to the occlusion and deocclusion of the fastening strips 130, 131 noted above.
  • Figs. 31 and 32 illustrate another embodiment of the closure device of the present invention.
  • the closure elements include inner arrowhead closure portions.
  • the fastening strip 730 includes a closure element 736 with closure portion 752 similar to the closure portion 152 in Fig.
  • closure element 734 with a closure portion 742 similar to closure portion 142 in Fig. 3.
  • the closure element 736 also includes a closure portion 754 similar to closure portion 652 in Fig. 29.
  • the closure element 734 also includes a closure portion 744 similar to closure portion 642 in Fig. 29.
  • Fig. 31 shows the fastening strips 730, 731 in a deoccluded position
  • Fig. 32 shows the fastening strips 730, 731 in an occluded position.
  • the occlusion and deocclusion of the fastening strips 730, 731 is similar to the occlusion and deocclusion of the fastening strips 130, 131 noted above.
  • Figs. 33 and 34 illustrate another embodiment of the closure device of the present invention.
  • the closure elements include inner and outer arrowhead closure portions.
  • the fastening strip 830 includes closure element 836 with an
  • outer closure portion 852 similar to the outer closure portion 652 in Fig. 29 and the fastening strip 831 includes closure element 834 with an outer closure portion 842 similar to outer closure portion 642 in Fig. 29.
  • the closure element 836 also includes a closure portion 854
  • closure element 834 also includes a closure portion 844 similar to closure portion 744 in Fig. 31.
  • Fig. 33 shows the fastening strips 830, 831 in a deoccluded position and Fig. 34 shows the fastening strips
  • the occlusion and deocclusion of the fastening strips 830, 831 is similar to the occlusion and deocclusion of the fastening strips 130,
  • the bag 620 includes a closure device 921 and sidewalls 922 joined at seams 925.
  • the closure device 921 includes fastening strips 930, 931 and a slider 932.
  • the sidewalls 922 and 30 the fastening strips 930, 931 include an additional seal 934, 936 near the seams 925.
  • the fastening strips 930, 931 and the slider 932 are the same as the fastening strips 130, 131 and the slider
  • the fastening strips 930, 931 occlude and deocclude in the same way as fastening strips 130, 131 except when the fastening strips 930, 931 encounter the seal 934, 936.
  • the additional seal 934, 936 is formed by permanently attaching a portion of the fastening strips 930, 931 which are below the separator finger 972.
  • the seal 934, 936 may be formed by heat sealing the fastening strips 930, 931 so that the closure portions 944, 954 and the inner webs 941, 951 are melted together as shown by comparing Figs. 38-40 with Figs. 41-43. Referring to Figs. 35 and 36, the seal 934, 936 extends along the fastening strips and slightly beyond the length of the separator finger 972. However, in other embodiments the seal 934, 936 may be less than or equal to the length of the separator finger 972.
  • the fastening strips 930, 931 are shown with two seals 934, 936. However, only one seal is necessary. If only one seal is used, then the seal should be located near the seam where the slider will be positioned when the fastening strips are occluded throughout their length (i.e. seal 934).
  • the other seal 936 can be eliminated or can be extended upwards at area 937 (see Fig. 35) to attach the outer webs 940, 950 and the closure portions 942, 952.
  • the separator finger would contact the seal 936 and prevent the slider from further movement sooner than if the slider contacted the seam 925.
  • the additional seal at area 937 could prevent a portion of the slider from extending over the seam 925.
  • Figs. 38-43 illustrate occlusion of the fastening strips 930, 931 in the end position using the seal 934.
  • these figures demonstrate that the closure device will have a leak proof seal when the slider is in the end position using an additional seal. The leak proof seal is created even though the separator finger extends between the outer webs because the inner webs are occluded or permanently attached at the portion below the separator finger.
  • the occlusion and deocclusion of the outer closure portions 942, 952 is substantially similar to the occlusion of the outer closure portions 142, 152 in Figs. 15-20. Furthermore, the movement of inner closure portions 944, 954 in Figs. 41-43 is substantially the same as the movement of the inner closure portions 144, 154 in Figs. 18-20. However, as shown in Figs. 38-40 a portion of the area below the separator finger 972 is permanently attached by the seal 934. More specifically, the inner closure portions 944, 954 are melted together so the closure portions 944, 954 do not exist in their previous form.
  • the seal 934 prevents the separating action of the separator finger 972 from deoccluding the seal 934 below the separator finger.
  • the portion below the separator finger is sealed and the inner closure portions 944, 954 remain occluded through the length of the fastening strips to establish a leak proof seal.
  • This leak proof seal is an improvement over the leak proof seal shown in Figs. 15-20.
  • Figs. 44-46 illustrate one embodiment of a slider of the present invention.
  • the representative dimensions of the various parameters are given as follows:
  • the slider may be manufactured by injection molding.
  • the slider may be formed from thermoplastic materials such 15 as, polypropylene, polyethylene, polyamide, polysulfone, ABS, PMMA, HDPE and Nylon.
  • Figs. 47 and 48 illustrate the female and male fastening strips respectively of one embodiment of the closure device of the present invention.
  • the fastening strips may be manufactured by extrusion through a die that has the approximate dimensions given above, although the die should be made somewhat larger than the desired final dimensions of the fastening strip, inasmuch as shrinkage of the extruded fastening strip is likely upon cooling.
  • the fastening strips of the closure device should be manufactured to have approximately uniform cross-sections. This not only simplifies the manufacturing of a device, but also contributes to the physical flexibility of the device, which is a desirable property in any event.
  • the closure elements of this invention may be formed from thermoplastic materials such as, for example, polyethylene, polypropylene, nylon, or the like, or from a combination thereof.
  • thermoplastic materials such as, for example, polyethylene, polypropylene, nylon, or the like, or from a combination thereof.
  • resins or mixtures of resins such as high density polyethylene, medium density polyethylene and low density polyethylene may be employed to prepare the novel fastener of this invention.
  • the closure element is made from low density polyethylene.
  • the selection of the thermoplastic material will be related to the closure design and its Young's Modulus and desired elasticity and flexibility correlated to provide the functionality of the closure as herein claimed.
  • the fastener of the present invention When used in a sealable bag, the fastener and the films that form the body of the bag can be made from heat sealable material.
  • the bag thus can be formed economically by heat sealing the aforementioned components to form the bag using thermoplastics of a type aforementioned for formation of the closure elements.
  • the bag is made from a mixture of high pressure, low density polyethylene and linear low density polyethylene.
  • the closure elements of the invention may be manufactured by extrusion or other known methods.
  • the closure device can be manufactured as individual fastening strips for later attachment to a film, or the fastening strips can be manufactured integrally with a film.
  • the closure elements can be manufactured with or without flange portions on one or both of the closure elements depending upon the intended use or expected additional manufacturing operations.
  • the closure device of this invention can be manufactured in a variety of forms to suit the intended use.
  • the closure device may be integrally formed with the sidewalls of a container, or connected to a container, by the use of any of many known methods.
  • thermoelectric device can be applied to a film in contact with a flange portion of a closure element or the thermoelectric device can be applied to a film in contact with the base portion of a closure element having no flange portion, to cause a transfer of heat through the film to produce melting at the interface of the film and a flange portion or base portion of the closure element.
  • the thermoelectric device can be heated rotary discs, traveling heater bands, resistance-heated slide wires, or the like.
  • the connection between the film and the closure element can also be established by the use of hot melt adhesives, hot jets of air to the interface, ultrasonic heating, or other known methods.
  • the bonding of the closure element to the film stock may be carried out either before or after the film is U-folded to form a bag. In any event, such bonding is done prior to side sealing the bags at the edges by conventional thermal cutting.
  • the male and female closure elements can be positioned on opposite sides of a film. Such an embodiment would be suited for wrapping an object or a collection of objects such as wires.
  • the male and female closure elements on a film generally should be parallel to each other, but this will depend on the intended use.
  • the present invention provides a closure device that overcomes the drawbacks inherent in the prior art. Specifically, the present invention affords a closure device with interlocking fastening strips and a slider which establishes a leak proof seal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Slide Fasteners (AREA)

Abstract

L'invention porte sur un dispositif de fermeture (121) dotée de bandes de fixation verrouillables (130, 131) et d'un élément coulissant (132) qui rend le dispositif étanche. Ce dispositif comprend des première et des secondes bandes de fixation verrouillables (130, 131) disposées de façon à se verrouiller sur une longueur prédéterminée et un élément coulissant (132) doté d'un doigt séparateur (172) qui vient en contact par coulissement avec les première et seconde bandes de fixation. La première bande de fixation (130) comporte un premier élément de fermeture (136) et la seconde bande de fixation (131) un second élément de fermeture (134). L'élément coulissant (132) facilite la fermeture des éléments de fermeture lorsqu'il est déplacé vers une première extrémité des bandes de fixation. Le doigt séparateur (172) s'étend, mais pas complètement, dans les éléments de fermeture (134, 136). La partie des éléments de fermeture se trouvant sous le doigt séparateur (172) est fermée lorsque l'élément coulissant (132) se trouve au niveau de la première extrémité des bandes de fixation.
PCT/US1999/013111 1999-06-10 1999-06-10 Dispositif de fermeture WO2000076339A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US1999/013111 WO2000076339A1 (fr) 1999-06-10 1999-06-10 Dispositif de fermeture
AU45592/99A AU4559299A (en) 1999-06-10 1999-06-10 Closure device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1999/013111 WO2000076339A1 (fr) 1999-06-10 1999-06-10 Dispositif de fermeture

Publications (1)

Publication Number Publication Date
WO2000076339A1 true WO2000076339A1 (fr) 2000-12-21

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Family Applications (1)

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PCT/US1999/013111 WO2000076339A1 (fr) 1999-06-10 1999-06-10 Dispositif de fermeture

Country Status (2)

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AU (1) AU4559299A (fr)
WO (1) WO2000076339A1 (fr)

Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960561A (en) * 1957-10-01 1960-11-15 Walter A Plummer Shielded wire harness
US3106941A (en) * 1958-12-01 1963-10-15 Walter A Plummer Method of fabricating articles from plastic and the article formed thereby
US3343233A (en) * 1966-03-11 1967-09-26 Gould Russell Slide fastener
US3426396A (en) * 1967-03-07 1969-02-11 Leon Ker Laguerre Profiled strip slide fastener
FR1564039A (fr) * 1968-03-07 1969-04-18
US3713923A (en) * 1968-02-26 1973-01-30 Minigrip Inc Method of assembling slider with a profiled strip separable fastener
US3806998A (en) * 1971-02-22 1974-04-30 Minigrip Inc Elastically flexible fastener
US4199845A (en) * 1978-02-08 1980-04-29 Minigrip, Inc. Slider for heavy duty flexible fastener tracks
US4262395A (en) * 1978-03-09 1981-04-21 Hans Bud Sliding clasp fastening means
US5007142A (en) * 1990-03-07 1991-04-16 Mobil Oil Corp. Method of assembling a snapped-together multipart plastic slider with a plastic reclosable fastener
US5007143A (en) * 1990-03-07 1991-04-16 Mobil Oil Corp. Rolling action zipper profile and slipper therefor
US5010627A (en) * 1990-03-07 1991-04-30 Mobil Oil Corporation Foldable plastic slider and method of assembly with a plastic reclosable fastener
US5020194A (en) * 1990-03-07 1991-06-04 Mobil Oil Corporation Leakproof zipper with slider
US5067208A (en) * 1991-03-22 1991-11-26 Mobil Oil Corporation Plastic reclosable fastener with self-locking slider
US5070583A (en) * 1990-03-07 1991-12-10 Mobil Oil Corporation Gull wing zipper slider
US5283932A (en) * 1993-06-10 1994-02-08 Mobil Oil Corporation Flexible plastic zipper slider with rigidizing structure for assembly with profiled plastic zipper
US5301934A (en) * 1992-08-10 1994-04-12 Lee Valley Tools Ltd. Twin screw vise
US5426830A (en) * 1993-06-10 1995-06-27 Mobil Oil Corporation Axial assembly of multi-part slider on zipper
US5431760A (en) * 1994-05-02 1995-07-11 Mobil Oil Corporation Zipper slider insertion through split track
US5442838A (en) * 1994-06-17 1995-08-22 Mobil Oil Corporation Rolling action zipper profile and slider
US5442837A (en) * 1994-06-20 1995-08-22 Mobil Oil Corporation Integrated end stops for zipper slider
US5448808A (en) * 1994-06-20 1995-09-12 Mobil Oil Corporation Foldable zipper slider with improved compression-type latch
US5664299A (en) * 1996-09-10 1997-09-09 Dowbrands L.P. Reclosable fastener assembly
US5809621A (en) * 1996-12-26 1998-09-22 S. C. Johnson Home Storage Inc. Reclosable fastener assembly with a plastic zipper and slider

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960561A (en) * 1957-10-01 1960-11-15 Walter A Plummer Shielded wire harness
US3106941A (en) * 1958-12-01 1963-10-15 Walter A Plummer Method of fabricating articles from plastic and the article formed thereby
US3343233A (en) * 1966-03-11 1967-09-26 Gould Russell Slide fastener
US3426396A (en) * 1967-03-07 1969-02-11 Leon Ker Laguerre Profiled strip slide fastener
US3713923A (en) * 1968-02-26 1973-01-30 Minigrip Inc Method of assembling slider with a profiled strip separable fastener
FR1564039A (fr) * 1968-03-07 1969-04-18
US3806998A (en) * 1971-02-22 1974-04-30 Minigrip Inc Elastically flexible fastener
US4199845A (en) * 1978-02-08 1980-04-29 Minigrip, Inc. Slider for heavy duty flexible fastener tracks
US4262395A (en) * 1978-03-09 1981-04-21 Hans Bud Sliding clasp fastening means
US5020194A (en) * 1990-03-07 1991-06-04 Mobil Oil Corporation Leakproof zipper with slider
US5007143A (en) * 1990-03-07 1991-04-16 Mobil Oil Corp. Rolling action zipper profile and slipper therefor
US5010627A (en) * 1990-03-07 1991-04-30 Mobil Oil Corporation Foldable plastic slider and method of assembly with a plastic reclosable fastener
US5007142A (en) * 1990-03-07 1991-04-16 Mobil Oil Corp. Method of assembling a snapped-together multipart plastic slider with a plastic reclosable fastener
US5070583A (en) * 1990-03-07 1991-12-10 Mobil Oil Corporation Gull wing zipper slider
US5067208A (en) * 1991-03-22 1991-11-26 Mobil Oil Corporation Plastic reclosable fastener with self-locking slider
US5301934A (en) * 1992-08-10 1994-04-12 Lee Valley Tools Ltd. Twin screw vise
US5283932A (en) * 1993-06-10 1994-02-08 Mobil Oil Corporation Flexible plastic zipper slider with rigidizing structure for assembly with profiled plastic zipper
US5426830A (en) * 1993-06-10 1995-06-27 Mobil Oil Corporation Axial assembly of multi-part slider on zipper
US5431760A (en) * 1994-05-02 1995-07-11 Mobil Oil Corporation Zipper slider insertion through split track
US5442838A (en) * 1994-06-17 1995-08-22 Mobil Oil Corporation Rolling action zipper profile and slider
US5442837A (en) * 1994-06-20 1995-08-22 Mobil Oil Corporation Integrated end stops for zipper slider
US5448808A (en) * 1994-06-20 1995-09-12 Mobil Oil Corporation Foldable zipper slider with improved compression-type latch
US5664299A (en) * 1996-09-10 1997-09-09 Dowbrands L.P. Reclosable fastener assembly
US5809621A (en) * 1996-12-26 1998-09-22 S. C. Johnson Home Storage Inc. Reclosable fastener assembly with a plastic zipper and slider

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