Bag having an elastic band, and method for the production thereof
First Claim
1. A bag (1, 101, 201) consisting of two faces (1a, 1b) joined together around their whole periphery, with the exception of one longitudinal edge, the bag having an opening (1d) emerging at said longitudinal edge, the two faces of the bag being welded to one another along two opposite lateral edges (2, 3), at least one face having, near said opening, at least one elastic band (16, 116, 216) joined to said face by two connection regions (17, 117, 217;
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2a, 17′
) in such a way that the effective relaxed length (L2) of said elastic band between the two connection regions corresponds to the gap between the two connection regions on the bag and is shorter than the length (L1) of the longitudinal edge of said face of the bag, characterized in that the elastic band (16, 116, 216) extends across the whole width of the bag, from one lateral edge to the other, said elastic band being welded to the two faces of the bag along said lateral edges, at least one of the abovementioned two connection regions forming an “
intermediate”
connection region (17, 117, 217, 17′
) located at a distance from the abovementioned two lateral edges.
1 Assignment
0 Petitions
Accused Products
Abstract
The bag (1) includes an elastic band (16) joined to the face (1a) of the bag by two joining areas (17; 2a) in such a manner that the useful length, when the elastic band is at rest (L2), corresponds to the space between the two joining areas on the bag or is less than the length (L1) of the longitudinal edge of the face. The elastic band extends over the entire width of the bag, from one lateral edge to the other, the elastic band being welded to two faces of the bag along these lateral edges, one of the at least two joining areas forming an intermediate joining area (17) located at a distance from the lateral edges.
41 Citations
14 Claims
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1. A bag (1, 101, 201) consisting of two faces (1a, 1b) joined together around their whole periphery, with the exception of one longitudinal edge, the bag having an opening (1d) emerging at said longitudinal edge, the two faces of the bag being welded to one another along two opposite lateral edges (2, 3), at least one face having, near said opening, at least one elastic band (16, 116, 216) joined to said face by two connection regions (17, 117, 217;
-
2a, 17′
) in such a way that the effective relaxed length (L2) of said elastic band between the two connection regions corresponds to the gap between the two connection regions on the bag and is shorter than the length (L1) of the longitudinal edge of said face of the bag, characterized in that the elastic band (16, 116, 216) extends across the whole width of the bag, from one lateral edge to the other, said elastic band being welded to the two faces of the bag along said lateral edges, at least one of the abovementioned two connection regions forming an “
intermediate”
connection region (17, 117, 217, 17′
) located at a distance from the abovementioned two lateral edges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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2a, 17′
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11. A method for the continuous production of a series of bags, said method comprising the steps consisting in:
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a) placing at least one elastic strip (16) inside a folded sheet (20), along one of the longitudinal edges of the sheet;
b) making, at regular intervals corresponding to the width of a bag, at least one transverse heat weld (17) limited to the height of the elastic strip only, so as to form an intermediate connection region between the elastic strip and the corresponding inside face of the sheet;
c) making, at regular intervals corresponding to the width of a bag, a plurality of pairs of adjacent transverse heat welds (2a, 3a) corresponding to the lateral edges of the bags, in such a way as to heat weld the abovementioned elastic strip to the lateral edges of the bags, said pairs of transverse heat welds being made at a distance from the abovementioned limited transverse heat welds (17);
d) making pre-cuts, at regular intervals, on the sheet (20) between the transverse heat welds of each pair, to form a series of pre-cut bags. - View Dependent Claims (12, 13)
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14. A series of bags (1, 101, 201) comprising a plurality of bags attached by the lateral edges of said bags, said series of bags having a longitudinal direction corresponding to longitudinal edges of said bags, each bag consisting of two faces (1a, 1b) joined together around their whole periphery, with the exception of one longitudinal edge, the bag having an opening (1d) emerging at said longitudinal edge, the two faces of the bag being welded to one another along two opposite lateral edges (2, 3) of said bag, at least one face having, near said opening, at least one elastic band (16, 116, 216) joined to said face by two connection regions (17, 117, 217;
-
2a, 17′
) in such a way that the effective relaxed length (L2) of said elastic band between the two connection regions corresponds to the gap between the two connection regions on the bag and is shorter than the length (L1) of the longitudinal edge of said face of the bag, characterized in that the elastic band (16, 116, 216) extends continuously along the whole length of the series of bags (1, 101, 201), said elastic band being welded to the two faces of the bag along said lateral edges of said bag, at least one of the abovementioned two connection regions forming an “
intermediate”
connection region (17, 117, 217, 17′
) located at a distance from the abovementioned two lateral edges.
-
2a, 17′
Specification