IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0778438
(1985-09-20)
|
우선권정보 |
NL-0003733 (1979-05-11) |
발명자
/ 주소 |
- Herder Kornelis (Goor NLX)
|
출원인 / 주소 |
- Wavin B.V. (Zwolle NLX 03)
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
2 |
초록
▼
A web of interconnected plastic bags with gusset folds. Each bag is provided with first fold part seals (8, 9, 10, 11) and with second fold part seals (13, 14, 15, 16). Additional seals (36) extend parallel to fold edges of the foil and are connected with subsequent first and second fold part seals.
A web of interconnected plastic bags with gusset folds. Each bag is provided with first fold part seals (8, 9, 10, 11) and with second fold part seals (13, 14, 15, 16). Additional seals (36) extend parallel to fold edges of the foil and are connected with subsequent first and second fold part seals. The additional seals (30) are in the region between inner (4, 4a) and outer (2, 3 and 2a, 3a) fold edges.
대표청구항
▼
An apparatus for manufacturing a valve free plastic bag (27) with gusset folds formed from a tubular foil, at least comprising a central (4, 4a) and two outer longitudinal gusset fold edges (2, 3, 2a, 3a) which bound a first and second gusset fold part, said bag being open at one end opposite a tran
An apparatus for manufacturing a valve free plastic bag (27) with gusset folds formed from a tubular foil, at least comprising a central (4, 4a) and two outer longitudinal gusset fold edges (2, 3, 2a, 3a) which bound a first and second gusset fold part, said bag being open at one end opposite a transverse bottom seal (12) and further comprising: (a) two first fold part seals (8, 9, 10, 11) at both sides of the bag, which first fold part seals always connect an outer foil layer (1a, 1b) with an opposite gusset fold part (6a, 5a; 6,5) said first fold part seals extending in the region between the central (4, 4a) and outer longitudinal fold edges (2, 3; 2a, 3a) in the region of said transverse bottom seal (12) and diverging from the region of said bottom seal (12) to the outer fold edges (2, 2a; 3, 3a), (b) second fold part seals (13, 14, 15, 16) at both sides of the bag which second foil part seals always connect an outer foil layer (1a, 1b) with an opposite gusset fold part (6a, 5a; 6, 5) said second fold part seals extending in the region between the central (4, 4a) and outer longitudinal fold edges (2, 3; 2a, 3a) at the end of the bag remote from the transverse bottom seal of this bag, said second fold part seals converging from the outer longitudinal fold edges (2, 3; 2a, 3a) to the open end of said bag (27) wherein least at both sides of the bag an additional seal (30) extends substantially parallel to the fold edges and in the region between inner and outer fold edges and in the region between inner and outer fold edges, said additional seals (30) being at least connected with the second fold part seals (13, 14; 15, 16) and extending from said second fold part seals towards the open end of said bag (27), said apparatus at least comprising: (1) conveying means for stepwise conveying a tubular plastics foil; (2) first sealing means for forming said first fold part seals (8, 9; 10, 11); (3) second sealing means for forming said second fold part seals (13, 14; 15, 16); (4) transverse sealing means for forming a transverse bottom seal (12); (5) additional sealing means for forming said additional seals (30) connecting at least said seals with said second sealing means; (6) separating means being active during the action of said first respectively second sealing means for forming said first respectively second fold part seals.
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