Abstract A method of forming a carrier bag made of synthetic thermoplastic material wherein a printed flat sheet of plastic has two reinforcing strips attached thereto and uniformly spaced relative to the median longitudinal axis of the sheet. The sheet is then bent about the longitudinal median axis to form a hose longitudinally open at one side so that the reinforcing strips are opposite one another. Lateral folds are formed in the hose to form two collapsible sidewalls and two reinforced sidewalls, and a longitudinal weld seam is made to longitudinally close the hose. Furthermore, a bottom weld seam transverse to the longitudinal weld seam is made and the so formed bag is separated from the strip and a grip aperture is formed in the upper portion of the bag. It is also possible to have the upper portion contoured simultaneously with the forming of the grip aperture.
A method of producing a carrier bag of synthetic thermoplastic foil comprising afixing a set of reinforcing strips to a printed flat band of foil so that they are uniformly spaced relative to the median longitudinal axis of said foil; bending the foil about the longitudinal median axis by about 180* to form a hose longitudinally open so that the strips are opposite one another; producing lateral folds in the hose to from two reinforced sidewalls and two collapsible sidewalls; forming a longitudinal weld seam to longitudinally close the hose; producing a bottom weld seam transverse the longitudinal one, separating the bag from the hose, and forming a grip aperture in the upper portion of the bag.
Claim 2
Independent Claim
117 words
A method of producing a carrier bag of synthetic thermoplastic foil comprising afixing a set of reinforcing strips to a printed flat band of foil so that they are uniformly spaced relative to the median longitudinal axis of said foil; bending the foil about the longitudinal median axis by about 180* to form a hose longitudinally open so that the strips are opposite one another; producing lateral folds in the hose to from two reinforced sidewalls and two collapsible sidewalls; forming a longitudinal weld seam to longitudinally close the hose; producing a bottom weld seam transverse the longitudinal one, separating the bag from the hose, and forming a grip aperture in the upper portion of the bag.
Claim 3
Dependent Claim
26 words
A method according to claim 1 wherein a separating cut, the grip aperture and a contour on the upper carrier bag edge are formed by stamping.
Claim 4
Dependent Claim
50 words
A method according to claim 1 wherein the lateral folds are made with different depths, the fold adjacent the longitudinal opening in the hose having the greater depth, the longitudinal edge of said fold then being joined to the longitudinal edge of the reinforced sidewall by said longitudinal weld seam.
Claim 5
Dependent Claim
32 words
A method according to claim 1 wherein the hose is longitudinally welded before the longitudinal folds are produced, and said longitudinal weld seam is contained wholly within one of said collapsible sidewalls.