Method of making plastic bag construction in serial roll form
OwnerEdwin F. Ernstinventor
Life of this patent
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Abstract
A plurality of expandable bags are serially connected lengthwise in roll form. Each bag is of substantially long length and has an expandable gusset near one end thereof and traversely of the length. The gusset end of each bag is respectively connected to the filling or open end of the next bag by perforated or weakened structure. Various modifications of the position of the opening are incorporated. Also, the bags are rolled into serial form in a compact package for distribution and use with the gusset and opening portions of each bag being rolled inwardly to the inside of the roll, or outwardly to the outside of the roll. The method of making these serially connected bags in roll form is also included.
Claims10
A method of making a plurality of serially connected bag structures in package roll form having the following steps:
- supplying a first strip of indeterminate length,
- attaching short determinate length strips from a second supply of strip material at spaced points along said first strip,
- forming a Z-fold expansion gusset closely adjacent to each point of attachment, and
- sealing the side edges together of the first member of indeterminate length and the spaced second members of determinate length to form individual bag structures, together with the additional step of tack sealing the side edges of the formed gusset prior to the edge sealing of the individual bag structures.
A method of making a plurality of serially connected bag structures in package roll form having the following steps:
- supplying a first strip of indeterminate length,
- attaching short determinate length strips from a second supply of strip material at spaced points along said first strip,
- forming a Z-fold expansion gusset closely adjacent to each point of attachment, and
- sealing the side edges together of the first member of indeterminate length and the spaced second members of determinate length to form individual bag structures without sealing the folds of the expansion gusset so that later the gusset can be expanded when each bag structure is used.
Dependencies are inferred from the claim text.