Claims
- 1. A method for the formation of a closed, operable and reclosable bag structure, which comprises:
- providing a bag having a generally rectangular base, generally rectangular front and rear walls upstanding from the integral with said base, generally rectangular side walls upstanding from said base and integral with said front and rear walls and said base, each of said side walls having a longitudinal fold line formed therein, and an open top,
- placing articles to be packaged by said bag therein,
- folding said side walls inwardly about said fold lines adjacent said open top,
- bringing the front and rear walls into abutting relationship adjacent the top edges thereof to close the open top of said bag while simultaneously abutting the folded side walls adjacent the top,
- folding a portion of said abutted faces downwardly and into abutting relationship with said front face, said portion corresponding in depth to approximately half the lateral dimensions of the base,
- forming elongate thin strips of polymeric material,
- die cutting a castellated shape longitudinally of said strip to separate the strip into two mirror image shaped strips,
- forming an orifice through said strips adjacent each alternate valley of the strip,
- separating the strips from each other,
- folding the peak of each castellation of each separate strip towards the remainder of the separate strip to form for each peak a recess between the folded-over portion and the remainder of the strip,
- separating individual elongate closure strips by cutting the strips transverse thereof in the alternate valley which does not have the orifice formed therethrough,
- positioning the recess of an individual closure strip in interference fit relationship with said folded portion of said bag with said remainder of the strip abutting said folded over portion on the front face thereof,
- applying adhesive to the exposed face of said remainder of said strip,
- folding said folded over portion to bring said remainder of said strip into engagement with an adjacent portion of said front face to provide a top closure wall parallel to said base constituted by the upper portion of said rear wall,
- curing said adhesive to achieve adhesive connection between said remainder of said closure and said engaged portion of said front face, and
- recovering the bag structure so formed.
- 2. The method of claim 1 wherein said castellated die cut has rounded ends and said separation of individual strips is carried out to provide rounded corners at each of the cuts.
- 3. The method of claim 1 including conveying said bag in an upright orientation generally horizontally during said operations.
- 4. The method of claim 1 wherein a plurality of said bags is serially subjected to said operations of article placement, folding, positioning said closure strip, adhesive application, folding, adhesive curing and bag structure recovery.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10177/75 |
Mar 1975 |
GBX |
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Parent Case Info
This is a division of application Ser. No. 664,906 filed Mar. 8, 1976.
US Referenced Citations (7)
Divisions (1)
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Number |
Date |
Country |
Parent |
664906 |
Mar 1976 |
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