초록 ▼

A plastics bag has at least one seal (34, 36) extending parallel to the mouth of the bag to close the sides. Preferably, a reclosable zipper seal (36) is provided below a top seal (34). A novel tag is provided, secured to the zipper seal (36) and extending through the top seal (34). The tag (11) is

A plastics bag has at least one seal (34, 36) extending parallel to the mouth of the bag to close the sides. Preferably, a reclosable zipper seal (36) is provided below a top seal (34). A novel tag is provided, secured to the zipper seal (36) and extending through the top seal (34). The tag (11) is generally M-shaped in cross-section with its outside legs secured to the seals and with an inner tuck which the consumer can withdraw from the mouth of the bag and break open to make an access hole through the seal or seals into the interior of the bag to facilitate full opening of the mouth of the bag. Methods of manufacturing such bags are also described, particularly for use with form-fill-seal machines.

대표청구항 ▼

1. A plastic bag comprising:a pair of sides defining an openable mouth along one margin of the sides;at least one seal extending parallel to said margin; anda tag accessible from the exterior of the bag with the bag sealed closed and located within the length of said at least one seal, the tag being

1. A plastic bag comprising:a pair of sides defining an openable mouth along one margin of the sides;at least one seal extending parallel to said margin; anda tag accessible from the exterior of the bag with the bag sealed closed and located within the length of said at least one seal, the tag being of a width to extend over only a portion of the length of the seal and being folded in a generally M-shaped configuration in cross-section to define two outside legs and two inside legs located between the outside legs, with outside surfaces of the outside legs of the tag being sealed to the bag sides at said at least one seal, whereby the inside legs of the tag can be manually withdrawn from between the outside legs and the outside legs can be separated to open a zone of the at least one seal to permit access to the interior of the bag.2. A bag according to claim 1, in which the tag is positioned substantially centrally of the said margin of the bag.3. A bag according to claim 1, in which the tag is folded to lie within the contour of the bag sides until withdrawn.4. A bag according to claim 1, in which the inside surfaces of the outside legs of the tag are in peel seal engagement with the outside surfaces of the inside legs of the tag in said M-shaped configuration.5. A bag according to claim 1, in which only those parts of the outside legs of the tag extending beyond the inside legs are sealed to the bag sides.6. A bag according to claim 1, in which the tag is provided with a line of weakness along the junction of the inside legs of the tag.7. A bag according to claim 6, in which the line of weakness comprises a row of perforations.8. A bag according to claim 1, in which the tag is made of a laminated material.9. A bag according to claim 8, in which the laminated material comprises at least three layers.10. A bag according to claim 9, in which the laminated material comprises four layers, a first layer of a material which is sealable to a plastics film, a second layer of a relatively strong material, a third layer which has heat insulating properties and a fourth layer of peel seal material.11. A bag according to claim 1, which has a reclosable zipper and two seals extending parallel to the said margin, one of which is a reclosable zipper seal.12. A bag according to claim 11, in which the reclosable zipper seal is on the inside in relation to the other seal, and the tag is located within both seals.13. A bag according to claim 11, in which the zipper has marginal flanges extending from interengagable male and female closure members, and the tag is sealed to inside surfaces of flanges extending from the closure members towards the mouth of the bag.14. A method of manufacturing a plastics bag having a pair of sides defining an openable mouth, comprising the steps of:providing at least one seal extending parallel to a margin of the bag which defines said openable mouth; andincorporating within the length of said at least one seal a tag which is of a width to extend over only a portion of the length of the seal and is folded in a generally M-shaped configuration in cross-section to define two outside legs and two inside legs located between the outside legs, with surfaces of the outside legs of the tag being sealed to the bag sides at said at least one seal, whereby the tag is accessible from the exterior of the bag with the bag sealed closed and said inside legs of the tag can be manually withdrawn from between the outside legs and the outside legs can be separated to open a zone of the at least one seal to permit access to the interior of the bag.15. A method according to claim 14, which includes sealing the tag to flanges of a reclosable zipper having interengageable male and female closure members, sealing the zipper and tag to a host material which is to form the sides of the bag, forming the bag, and creating a second seal parallel to said margin, on the side of the zipper which is closer to the mouth of the bag, with the tag extending through the second seal.16. A method according to claim 14, which includes sealing the tag to a host material which is to form the sides of the bag, forming the bag, and creating the at least one seal parallel to said margin with the tag extending through the at least one seal.17. A method according to claim 14, which includes folding a length of laminated material into a generally M-shaped configuration in cross-section, and cutting off a section of the folded material to form the tag.18. A method according to claim 17, which includes providing a line of weakness along the junction of the inside legs of the tag.19. A method according to claim 16, in which the tag is located on the host material so that the tag lies within the contour of the bag sides when the bag is completed and sealed.