초록 ▼

A method and apparatus for sealing a drawtape to a hem of a thermoplastic film structure is disclosed. The thermoplastic film structure includes a panel, the hem, and the drawtape. The hem is formed along one end of the panel, and the drawtape is housed within the hem. In the method, the film struct

A method and apparatus for sealing a drawtape to a hem of a thermoplastic film structure is disclosed. The thermoplastic film structure includes a panel, the hem, and the drawtape. The hem is formed along one end of the panel, and the drawtape is housed within the hem. In the method, the film structure is conveyed to a stationary heat sealer that includes a stationary heated block and a hot air blower spaced from the heated block. The film structure is momentarily stopped at the stationary heat sealer with hem disposed between the heated block and the hot air blower. While the film structure is stopped, the hot air blower blows heated air onto the hem to force the hem against the heated block, thereby sealing the drawtape to the hem.

대표청구항 ▼

A method and apparatus for sealing a drawtape to a hem of a thermoplastic film structure is disclosed. The thermoplastic film structure includes a panel, the hem, and the drawtape. The hem is formed along one end of the panel, and the drawtape is housed within the hem. In the method, the film struct

A method and apparatus for sealing a drawtape to a hem of a thermoplastic film structure is disclosed. The thermoplastic film structure includes a panel, the hem, and the drawtape. The hem is formed along one end of the panel, and the drawtape is housed within the hem. In the method, the film structure is conveyed to a stationary heat sealer that includes a stationary heated block and a hot air blower spaced from the heated block. The film structure is momentarily stopped at the stationary heat sealer with hem disposed between the heated block and the hot air blower. While the film structure is stopped, the hot air blower blows heated air onto the hem to force the hem against the heated block, thereby sealing the drawtape to the hem. of sheet material and a second web of sheet material (b) passing the first web of sheet material a predetermined distance beyond a first cutting assembly; (c) passing the second web of sheet material a predetermined distance beyond a second cutting assembly; (d) cutting the first web of sheet material with the first cutting assembly to provide a first sheet of material having a predetermined length; (e) cutting the second web of sheet material with the second cutting assembly to provide a second sheet of material having a predetermined length; (f) positioning the first sheet of material on the second sheet of material; (g) passing the first sheet of material and the second sheet of material between a female die and a male die, the female die having an opening intersecting one end thereof, the male die shaped such that at least a portion of the male die is receivable in the opening of the female die; and (h) positioning the male die and the female die in a forming position wherein at least a portion of the male die is inserted into the opening of the female die so as to form the article from the first and second sheets of material. 7. The method of claim 6 wherein the first sheet of material is concentrically positioned on the second sheet of material. 8. A method for forming a plurality of articles, the method comprising the steps of: (a) providing a first web of sheet material and a second web of sheet material; (b) passing the first web of sheet material a predetermined distance beyond a first cutting assembly; (c) passing the second web of sheet material a predetermined distance beyond a second cutting assembly; (d) cutting the first web of sheet material with the first cutting assembly to provide a first sheet of material having a predetermined length; (e) cutting the second web of sheet material with the second cutting assembly to provide a second sheet of material having a predetermined length; (f) positioning the first sheet of material on the second sheet of material; (g) passing the first sheet of material and the second sheet of material between a female die and a male die, the female die having an opening intersecting one end thereof, the male die shaped such that at least a portion of the male die is receivable in the opening of the female die; (h) positioning the male die and the female die in a forming position wherein at least a portion of the male die is inserted into the opening of the female die so as to form an article from the first and second sheets of material; (i) removing the male die from the female die along with the formed article; and (j) repeating steps (b)-(i) to form a subsequent article. 9. The method of claim 8 further comprising: holding the formed article against the male die as the male die is moved from the forming position to a discharge position; and removing the formed article from the male die when the male die is in the discharge position. 10. The method of claim 8 wherein the first and second webs of sheet material are passed beyond the first and second cutting assemblies and cut with the first and second cutting assemblies, respectively, to form a first and second sheet of material for forming the subsequent article while the male die is in the forming position forming the article. 11. The method of claim 10 wherein the first and second sheets of material for forming the subsequent article are passed between the male die and the female die subsequent to the male die being moved from the forming position. 12. The method of claim 8 wherein the female die comprises a plurality of die segments configured to cooperatively form the female die, the die segments being movable between an open position wherein the die segments are spread apart from one another and a closed position wherein the die segments are brought together to cooperatively form the female die, and wherein the method further comprises: moving the die segments to the open position to facilitat