IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0076018
(1993-06-14)
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발명자
/ 주소 |
- Terminella Emanuele (Fayetteville AR) Terminella Frank (Fayetteville AR) Terminella Joseph (Fayetteville AR)
|
출원인 / 주소 |
- Pacmac, Inc. (Fayetteville AR 02)
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인용정보 |
피인용 횟수 :
89 인용 특허 :
0 |
초록
▼
A vertical form, fill and seal packing machine and method for making recloseable bags having a safety seal exterior to a recloseable seal. The machine produces durable, substantially air-tight bags at high speed and provides for the production of different size bags and different amounts of product
A vertical form, fill and seal packing machine and method for making recloseable bags having a safety seal exterior to a recloseable seal. The machine produces durable, substantially air-tight bags at high speed and provides for the production of different size bags and different amounts of product in the bags. The machine includes a film drive and pinch roll pair, a pair of film pull belts, and a pair of zipper drive rollers for pulling the plastic film and zipper strip through the machine. The production of different size bags is facilitated by having the film drive roll, pull belts, and zipper drive rollers simultaneously driven in bag length increments by a common drive source. Also, to accommodate the production of different size bags, the machine includes a vertically adjustable mark sensor. Further, the machine and method of the present invention insures reliable seals along the edges of each product filled bag by having the zipper drive rollers and a bag grabber mechanism stretch the bag material prior to cross-sealing and severing the bag material.
대표청구항
▼
A vertical, form, fill, and seal apparatus of the type that operates in conjunction with a product supply apparatus providing product in discrete quantities and that forms a continuous, heat sealable plastic film and zipper strip into separate product filled, recloseable, sealed bags comprising: a f
A vertical, form, fill, and seal apparatus of the type that operates in conjunction with a product supply apparatus providing product in discrete quantities and that forms a continuous, heat sealable plastic film and zipper strip into separate product filled, recloseable, sealed bags comprising: a first controlled release festooner arrangement for storing and supplying a continuous plastic film, a second controlled release festooner arrangement for storing and supplying a continuous, plastic, zippered cap strip, a generally vertical fill tube assembly including a vertical fill tube downstream of the first festooner arrangement for the continuous film and around which the continuous film is formed and wrapped, feeding means including a film drive roll upstream of the vertical fill tube, a pair of endless pull belts adjacent the vertical fill tube, a pair of zipper drive rollers located downstream of the vertical fill tube and a common drive source for the drive roll, pull belts and drive rollers for feeding the zippered cap strip and plastic film along the length of the vertical fill tube in bag length increments with edges of the plastic film in overlapping relationship with edges of the zippered cap strip, vertical sealing means for sealing the edges of the plastic film to the edges of the zippered cap strip to form a length of flexible, plastic tube, a pinch seal assembly downstream of the vertical fill tube for forming first and second horizontal seals across the flexible plastic tube and for severing the plastic tube, the first horizontal seal defining the downstream edge of a bag about to be filled with product and the second horizontal seal defining the upstream edge of a bag which has already received product, and a bag grabber mechanism having opposing air cylinder units for gripping and horizontally elongating the flexible, plastic tube transverse to its length prior to formation of said first horizontal seal, for sequentially supporting the upstream edge of each product filled bag during formation of the second horizontal seal and for sequentially releasing each completed, recloseable, product filled, sealed bag following formation of the second horizontal seal and severing of the bag from the flexible tube, wherein said zipper drive rollers and said bag grabber mechanism are mounted on a common reciprocating element so that said zipper drive rollers and said bag grabber mechanism are moved in unison transverse to the vertical fill tube between a first position in which the zipper drive rollers and bag grabber mechanism are vertically aligned along a vertical axis parallel to the vertical fill tube and a second position in which the zipper drive roller and bag grabber mechanism are spaced further from the vertical fill tube and wherein the zipper drive rollers and bag grabber mechanism are moved from the first position to the second position prior to and during formation of said horizontal seals and from the second position back to the first position following severing and horizontal sealing of the product filled bag and prior to incremental movement of the plastic film and zippered cap strip along the vertical fill tube.
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