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    • 3. 发明专利
      CA925417A PLASTICS BAGS MANUFACTURE 未知
    • PLASTICS BAGS MANUFACTURE
    • CA925417A
    • 1973-05-01
    • CA60158
    • 1969-08-21
    • BRITISH VISQUEEN LTD
    • HIGHFIELD P
    • B29C53/00 , B29C65/00 , B29C65/02 , B29C65/74 , B31B37/00 , B31B50/64 , B31B50/78
    • 1,273,156. Gusset opener; seaming non-metallic sheet material. BRITISH VISQUEEN Ltd. 8 Aug., 1969 [23 Aug., 1968], No. 40473/68. Headings B5D and B5K. [Also in Division B8] A plough or gusset opener comprising a wire 8 and a part 6 of diamond cross-section (Fig. 2) is provided to separate opposed seals e.g. 5a, 5b that may have inadvertantly become sealed together e.g. 5c during their formation e.g. when forming block-bottomed bags. As shown, a folded plastics web 1 having a pleat 2 coated with a yeat-seal inhibitor on its outer surface e.g. printing ink passes to a first heat-sealing station where double V-shaped seals 5, e.g. an example of such a seal being 5a, 5d, are formed to extend partly across the pleat 2 to leave a small separation adjacent the pleat fold 9 wherein the wire 8 may lie. As the web 1 moves intermittently towards a second station providing transverse seals 13, the part 6 progressively separates the opposed arms e.g. 5a, 5b of the V-shaped seals, e.g. 5a, 5d. The wire 8 which is anchored to a support 10, passes through tubing (7, Fig. 2) brazed into a groove along the inner edge of the part 6 to be anchored to a support 11 via a tension adjustor 12. The web 1 may comprise side-gussetted, lay-flat tubing which may be cut longitudinally to form two rows of bag or transversely midway between the transverse seals 13 to form half-sized bags. The bags may be only partly severed from each other. The web may comprise films of polythene, polypropylene copolymers of ethylene or propylene with other olefines or unsaturated monomers, polyethylene terephthalate or vinylidene chloride copolymers. The film may bear a heat-seal coating on its inner surface and be used for packaging cut loaves.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 5. 发明专利
      DK124932B  未知
    • DK124932B
    • 1972-12-11
    • DK450069
    • 1969-08-21
    • BRITISH VISQUEEN LTD
    • HIGHFIELD P
    • B29C53/00 , B29C65/00 , B29C65/02 , B29C65/74 , B31B37/00 , B31B50/64 , B31B50/78 , B31B1/64
    • 1,273,156. Gusset opener; seaming non-metallic sheet material. BRITISH VISQUEEN Ltd. 8 Aug., 1969 [23 Aug., 1968], No. 40473/68. Headings B5D and B5K. [Also in Division B8] A plough or gusset opener comprising a wire 8 and a part 6 of diamond cross-section (Fig. 2) is provided to separate opposed seals e.g. 5a, 5b that may have inadvertantly become sealed together e.g. 5c during their formation e.g. when forming block-bottomed bags. As shown, a folded plastics web 1 having a pleat 2 coated with a yeat-seal inhibitor on its outer surface e.g. printing ink passes to a first heat-sealing station where double V-shaped seals 5, e.g. an example of such a seal being 5a, 5d, are formed to extend partly across the pleat 2 to leave a small separation adjacent the pleat fold 9 wherein the wire 8 may lie. As the web 1 moves intermittently towards a second station providing transverse seals 13, the part 6 progressively separates the opposed arms e.g. 5a, 5b of the V-shaped seals, e.g. 5a, 5d. The wire 8 which is anchored to a support 10, passes through tubing (7, Fig. 2) brazed into a groove along the inner edge of the part 6 to be anchored to a support 11 via a tension adjustor 12. The web 1 may comprise side-gussetted, lay-flat tubing which may be cut longitudinally to form two rows of bag or transversely midway between the transverse seals 13 to form half-sized bags. The bags may be only partly severed from each other. The web may comprise films of polythene, polypropylene copolymers of ethylene or propylene with other olefines or unsaturated monomers, polyethylene terephthalate or vinylidene chloride copolymers. The film may bear a heat-seal coating on its inner surface and be used for packaging cut loaves.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 7. 发明专利
      ZA705723B PLASTICS WEB SLITTING AND SEALING DEVICE 未知
    • PLASTICS WEB SLITTING AND SEALING DEVICE
    • ZA705723B
    • 1972-04-26
    • ZA705723
    • 1970-08-19
    • BRITISH VISQUEEN LTD
    • HIGHFIELD P , HILL G
    • B29C65/00 , B29C65/22 , B29C65/74 , B29C
    • 1301848 Seaming and finishing edges of non- metallic sheet material BRITISH VISQUEEN Ltd 14 Aug 1970 [8 Sept 1969] 44343/69 Headings B5A and B5K [Also in Division D1] A resistance-heated blade 1 for simultaneously slitting an advancing thermoplastic web and sealing the slit edges provided on one of its longer sides with a projecting edge portion 3 so shaped that it may intersect the path of the web when the blade is held perpendicular thereto and with its flat faces parallel to the direction of travel of the web, the blade being cut away behind the projection 3 so as to have its smallest cross-sectional area 4 in the vicinity of the projection 3, and being apertured at 2 at its two ends for attachment to a pair of conductors, is characterized in that the contour of the blade 1 and the positions of the apertures 2 are such that the neutral line of tension 5, i.e. the line through the ends of the blade about which the strains resulting from the attachment of the blade at its two ends, under longitudinal tension are balanced, lies wholly within the body of the blade. The blade 1 may have its smallest cross sectional area 4 in advance of the crest of the projection 3 in relation to the travelling web, as shown, or at the crest of the projection 3. The blade may be used for dividing flattened tubular films into at least two sections or for slitting a single thermoplastic layer, e.g. to prevent fraying of cut edges of a woven fabric or to form bead edges to strengthen the cut edges of slit film.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 8. 发明专利
      CA931067A PLASTICS WEB SLITTING AND SEALING DEVICE 未知
    • PLASTICS WEB SLITTING AND SEALING DEVICE
    • CA931067A
    • 1973-07-31
    • CA92590
    • 1970-09-08
    • BRITISH VISQUEEN LTD
    • HIGHFIELD P , HILL G
    • B29C65/00 , B29C65/22 , B29C65/74
    • 1301848 Seaming and finishing edges of non- metallic sheet material BRITISH VISQUEEN Ltd 14 Aug 1970 [8 Sept 1969] 44343/69 Headings B5A and B5K [Also in Division D1] A resistance-heated blade 1 for simultaneously slitting an advancing thermoplastic web and sealing the slit edges provided on one of its longer sides with a projecting edge portion 3 so shaped that it may intersect the path of the web when the blade is held perpendicular thereto and with its flat faces parallel to the direction of travel of the web, the blade being cut away behind the projection 3 so as to have its smallest cross-sectional area 4 in the vicinity of the projection 3, and being apertured at 2 at its two ends for attachment to a pair of conductors, is characterized in that the contour of the blade 1 and the positions of the apertures 2 are such that the neutral line of tension 5, i.e. the line through the ends of the blade about which the strains resulting from the attachment of the blade at its two ends, under longitudinal tension are balanced, lies wholly within the body of the blade. The blade 1 may have its smallest cross sectional area 4 in advance of the crest of the projection 3 in relation to the travelling web, as shown, or at the crest of the projection 3. The blade may be used for dividing flattened tubular films into at least two sections or for slitting a single thermoplastic layer, e.g. to prevent fraying of cut edges of a woven fabric or to form bead edges to strengthen the cut edges of slit film.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
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