Method and apparatus for sealing zippers to bag making film
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65B-061/18
B65B-009/06
출원번호
US-0922713
(2004-08-20)
발명자
/ 주소
Cortigiano, Sr., Ronald
출원인 / 주소
Illinois Tool Works Inc.
대리인 / 주소
Ostrager Chong Flaherty &
인용정보
피인용 횟수 :
10인용 특허 :
18
초록▼
An automated reclosable packaging manufacturing equipment for applying zipper tape to bag making film, especially as part of a form-fill-seal process, and a method of joining a zipper flange of a zipper assembly to bag making film without “seal-through” of the zipper flanges. The method comprises th
An automated reclosable packaging manufacturing equipment for applying zipper tape to bag making film, especially as part of a form-fill-seal process, and a method of joining a zipper flange of a zipper assembly to bag making film without “seal-through” of the zipper flanges. The method comprises the steps of: (a) pressing a web of bag making film and first and second zipper flanges of a zipper assembly together along the length of the latter, with the first zipper flange sandwiched between and in contact with the web of bag making film and the second zipper flange; and (b) during step (a), causing heat to be conducted through the web of bag making film into the first zipper flange. The amount of heat conducted through the web of bag making film must be sufficient to seal the web of bag making film to the first zipper flange without sealing the first zipper flange to the second zipper flange.
대표청구항▼
1. A system for manufacturing reclosable bags comprising:a vertical form-fill-seal (VFFS) machine for forming, filling and sealing a reclosable bag, comprising a forming collar, a fill tube and sealing means; a roll of bag making film comprising a wound portion and an unwound portion, the unwound ba
1. A system for manufacturing reclosable bags comprising:a vertical form-fill-seal (VFFS) machine for forming, filling and sealing a reclosable bag, comprising a forming collar, a fill tube and sealing means; a roll of bag making film comprising a wound portion and an unwound portion, the unwound bag making film extending from said wound portion of said roll to said forming collar arid through said vertical FFS machine; opposing grooved elements comprising grooves designed to hold interlocked first and second closure members of a zipper assembly while first and second zipper flanges of said zipper assembly project in a forward machine direction, said first zipper flange being disposed between unwound bag making film and said second zipper flange; first and second sealing bars arranged in opposition at a first sealing station with said first sealing bar above said second zipper flange and said second sealing bar below the unwound bag making film; means for moving said first and second sealing bars between respective extended positions and respective retracted positions, said first and second zipper flanges and a first portion of unwound bag making film being pressed between said first and second sealing bars in their respective extended positions; first control means for heating said second sealing bar while in its extended position, said first sealing bar being unheated while in its extended position, and said second sealing bar being heated to a degree that said first zipper flange is sealed to said first portion of unwound bag making film without said first zipper flange being sealed to said second zipper flange; and means for advancing the bag making film with said zipper assembly attached thereto from said first sealing station to said sealing means of said VFFS machine. 2. The system as recited in claim 1, further comprising:third and fourth sealing bars arranged in opposition at a second sealing station, said third and fourth sealing bars being disposed below said fill tube on opposite sides of the reclosable bag; means for moving said third and fourth sealing bars between respective extended positions and respective retracted positions, said first and second zipper flanges, a second portion of unwound bag making film in contact with said second zipper flange, and a third portion of said unwound bag making film in contact with said first zipper flange being pressed between said third and fourth sealing bars in their respective extended positions; and second control means for heating said fourth sealing bar while in its extended position, said third sealing bar being unheated while in its extended position, and said fourth sealing bar being heated to a degree such that said second zipper flange is sealed to said second portion of unwound bag making film without said second zipper flange being sealed to said first zipper flange. 3. The system as recited in claim 1, wherein said opposing grooved elements comprise a shelf having a longitudinal groove and a plurality of drive rollers, each drive roller having a peripheral groove aligned with said longitudinal groove of said shelf.4. The system as recited in claim 3, wherein said longitudinal groove of said shelf is generally parallel to said first sealing bar.5. The system as recited in claim 3, further comprising: a carriage supporting said plurality of drive rollers; first means for retracting said carriage in a vertical direction; second means for retracting said first sealing bar in a vertical direction; and a support frame supporting said first and second retracting means.6. The system as recited in claim 1, wherein said sealing means of said VFFS machine comprise:fifth and sixth sealing bars arranged in opposition and disposed below said fill tube on opposite sides of the bag and above said third and fourth sealing bars, wherein said fifth sealing bar is mechanically linked to said third sealing bar and said sixth sealing bar is mechanically linked to said fourth sealing bar; and third control means for heating said fifth and sixth sealing bars while in their extended positions, said fifth and sixth sealing bars being heated to a degree such that opposing walls of the bag are sealed to each other. 7. The system as recited in claim 6, wherein said sealing means of said VFFS machine further comprise:seventh and eighth sealing bars disposed on opposite sides of the bag below said fifth and sixth sealing bars and above said third and fourth sealing bars respectively, wherein said seventh sealing bar is mechanically linked to said fifth sealing bar and said eighth sealing bar is mechanically linked to said sixth sealing bar, said seventh and eight sealing bars being heated by said third control means; and a cutting instrument for cutting the opposing walls of the bag along a transverse line at an elevation between the elevations of said fifth and seventh sealing bars, at least a part of said cutting instrument moving with the mechanically linked sealing bars on one side of the bag. 8. An apparatus for making a zippered bag, comprising the following:first pressing means for pressing a first portion of a web of bag making film and first and second zipper flanges of a zipper assembly together along the length of said zipper assembly, with said first zipper flange sandwiched between and in contact with said first portion of said web and said second zipper flange; first heat control means for causing heat from said first pressing means to be conducted through said first portion of said web into said first zipper flange during pressing, the amount of heat conducted through said first portion of said web being sufficient to join said first portion of said web to said first zipper flange without joining said first zipper flange to said second zipper flange; a fill tube; a forming collar for wrapping said web of bag making film around said fill tube; means for guiding a section of said web that carries said zipper assembly so that first and second marginal portions of said web confront each other adjacent said fill tube; a pair of mutually opposing vertical sealing bars for joining at least respective portions of said first and second marginal portions together; first and second cross sealing jaws disposed below the elevation of a lowermost point of said fill tube, said first cross sealing jaw comprising first and second cross sealing bars, and said second cross sealing jaw comprising third and fourth cross sealing bars respectively mutually opposed to said first and second cross sealing bars; a cutting instrument for cutting said web along a transverse line at an elevation between said first and second cross sealing bars, said first and second cross sealing jaws joining respective portions of said web above and below the cut line; second pressing means for pressing said first portion of said web, said first and second zipper flanges of said zipper assembly, and second and third portions of said web together along the length of said zipper assembly, with said second zipper flange sandwiched between and in contact with said second and third portions of said web and said first zipper flange; and second heat control means for causing heat from said second pressing means to be conducted through said second and third portions of said web into said second zipper flange during pressing, the amount of heat conducted through said second and third portions of said web being sufficient to join said second and third portions of said web to said second zipper flange without joining said second zipper flange to said first zipper flange. 9. The apparatus as recited in claim 8, wherein said first pressing means comprises a heated sealing bar and an unheated sealing bar, and said first heat control means comprises a programmable heat controller that controls the amount of heat emitted by said heated sealing bar.10. The apparatus as recited in claim 8, wherein said second pressing means comprises a heated sealing bar and an unheated sealing bar, and said second heat control means comprises a programmable heat controller that controls the amount of heat emitted by said heated sealing bar.11. A vertical form-fill-seal machine comprising:a fill tube; a forming collar partly surrounding a portion of said fill tube with a gap therebetween; a web of bag making film having a multiplicity of zipper assemblies attached thereto at spaced intervals along a machine direction, each zipper assembly being oriented along a transverse direction, said web passing through said gap, being wrapped around said fill tube, and extending downward below said fill tube, each zipper assembly comprising first and second zipper strips, said first zipper strip comprising a first closure profile and a first zipper flange, and said second zipper strip comprising a second closure profile and a second zipper flange, said first zipper flange being joined to a first portion of said web, and said second zipper flange being not joined to said web; means for guiding a section of said web that carries a zipper assembly so that first and second marginal portions of said web confront each other adjacent said fill tube; a pair of mutually opposing vertical sealing bars for joining at least respective portions of said first and second marginal portions together; first and second cross sealing jaws disposed below the elevation of a lowermost point of said fill tube, said first cross sealing jaw comprising first and second cross sealing bars, and said second cross sealing jaw comprising third and fourth cross sealing bars respectively mutually opposed to said first and second cross sealing bars; a cutting instrument for cutting said web along a transverse line at an elevation between said first and second cross sealing bars, said first and second cross sealing jaws joining respective portions of said web above and below the cut line; fifth and sixth cross sealing bars disposed at an elevation below said fill tube where said first and second zipper flanges of each successive zipper assembly are held stationary during each successive dwell time respectively, said fifth and sixth sealing bars being reciprocatable to press said first portion of said web, said first and second zipper flanges of said zipper assembly, and second and third portions of said web together along the length of each successive zipper assembly, with said second zipper flange sandwiched between and in contact with said second and third portions of said web and said first zipper flange, said fifth sealing bar being heated and in contact with said second and third portions of said web, and said sixth sealing bar being not heated and in contact with said first portion of said web; and a programmable heat controller programmed to cause said fifth sealing bar to emit heat in an amount sufficient to join said second and third portions of said web to said second zipper flange without joining said second zipper flange to said first zipper flange.
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이 특허에 인용된 특허 (18)
Johnson, James R., Apparatus for applying tape with fastener profiles to a web.
Van Erden Donald L. ; Malin Art ; McMahon Michael J. ; Share Lawrence, Method for attaching reclosable zipper strip transversely to thermoplastic film material.
Van Erden Donald L., Slide-zipper assembly, method of attaching slide-zipper assembly to thermoplastic film, and method of making slide-zippered packages.
Van Erden Donald L., Slide-zipper assembly, method of attaching slide-zipper assembly to thermoplastic film, and method of making slide-zippered packages.
Malin Art ; Van Erden Donald L. ; Kohl ; Jr. James G. ; McMahon Michael J., Zipper strip and method of positioning the strip transverse longitudinal axis.
Nanba, Yoshinori; Tanaka, Kenichi; Goto, Shuichi, Easily tearable fastener tape, method of producing the fastener tape, packaging bag with easily tearable fastener tape, and device and method for producing the packaging bag.
Dytchkowskyj, David Z.; Mikulsky, Lawrence D.; Grasse, Scott R.; Moran, Daniel J.; Hunnicutt, Peter T., In-line method for securing a closure system onto a discrete pouch.
Dytchkowskyj, David Z.; Mikulsky, Lawrence D.; Grasse, Scott R.; Moran, Daniel J.; Hunnicutt, Peter T., In-line method for securing a closure system onto a discrete pouch.
Dytchkowskyj, David Z.; Mikulsky, Lawrence D.; Grasse, Scott R.; Moran, Daniel J.; Hunnicutt, Peter T., Machine for securing a closure system onto a discrete pouch.
Dytchkowskyj, David Z.; Mikulsky, Lawrence D.; Grasse, Scott R.; Moran, Daniel J.; Hunnicutt, Peter T., Machine for securing a closure system onto a discrete pouch.
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