The present disclosure relates to thermoplastic bags having a drawtape within a hem, where the drawtape includes a deformation pattern of a plurality of ribs and a plurality of web areas. The plurality of ribs can include ribs that extend across the drawtape in a non-parallel direction with respect to the width of the drawtape (e.g., at an angle). In some instances, the non-parallel direction causes each rib to point towards a hem hole of the hem that exposes a portion of the drawtape. The plurality of ribs can further be mirrored across an axis that corresponds to a length of the drawtape. In some cases, the ribs are formed via a structural elastic-like film (SELF) process, such as a phased SELF process that leaves a portion of the drawtape without ribs.

In certain examples, a machine that forms a web into bags or pouches includes a sealing section through which the web is conveyed in a machine direction. The sealing section is configured to form a lap seal in the web and has an input end configured to receive the web which has a first web section and a second web section. An ultrasonic sealer with a horn and an anvil defines a nip therebetween through which the first web section passes. The ultrasonic sealer is configured to form the lap seal in the first web section. The anvil is positioned between the first web section and the second web section. An output end is configured to dispense the web with the lap seal formed therein.

In certain examples, a machine that forms a web into bags or pouches includes a sealing section through which the web is conveyed in a machine direction. The sealing section is configured to form a lap seal in the web and has an input end configured to receive the web which has a first web section and a second web section. An ultrasonic sealer with a horn and an anvil defines a nip therebetween through which the first web section passes. The ultrasonic sealer is configured to form the lap seal in the first web section. The anvil is positioned between the first web section and the second web section. An output end is configured to dispense the web with the lap seal formed therein.

A protective product, such as, e.g., an envelope or pouch, is provided that includes at least one expanded slit paper sheet in an expanded state, and an embossed paper sheet facing the expanded slit paper sheet and fixed to the expanded slit paper sheet along at least a portion of a length in an expansion direction of the expanded slit sheet paper. In the preferred embodiments, the embossed paper sheet has a plurality of embossings that increase the rigidity of the embossed paper sheet, thereby inhibiting deformation of the embossed paper sheet that is fixed to the expanded slit sheet paper.

According to some illustrative embodiments, a protective product is provided that includes: at least one expandable slit paper sheet, said at least on expandable slit paper being expanded between opposing ends of said slit paper; a first embossed paper sheet facing said expanded slit paper sheet and a second paper sheet facing an opposite side of said at least one expanded slit paper sheet, at least one of said first embossed paper sheet and said second paper sheet being fixed to said expanded slit paper sheet at the opposing ends of said expanded slit paper sheet and thereby maintaining said expanded paper in its expanded state, said first embossed paper sheet having a plurality of embossings that increase the rigidity of said embossed paper sheet, whereby inhibiting deformation of said embossed paper sheet that is fixed to said expanded slit sheet paper.

A method for manufacturing a rectangular-bottomed packaging bag includes an unfolding step of unfolding a flat bag by separating a pair of opening/closing plates (13) inserted into the flat bag from each other in a thickness direction of the flat bag, and a gusset forming step, after the unfolding step, of forming a side gusset and a bottom gusset by thrusting folding plates (11 and 12) between the pair of opening/closing plates (13) from the outside of the bag toward the inside of the bag.

A method for manufacturing a rectangular-bottomed packaging bag includes an unfolding step of unfolding a flat bag by separating a pair of opening/closing plates (13) inserted into the flat bag from each other in a thickness direction of the flat bag, and a gusset forming step, after the unfolding step, of forming a side gusset and a bottom gusset by thrusting folding plates (11 and 12) between the pair of opening/closing plates (13) from the outside of the bag toward the inside of the bag.

Apparatus and method of manufacturing open-mouth bags, comprising a storage device with a supply of bag film, a control device for controlling, a conveying device for conveying the bag film and/or the bag body along a conveying path, a welding device with welding means for making a bottom seam in the bag film and a cutting device with a cutting means for separating a predetermined film length of the bag film to form the bag body of an open-mouth bag. The control device controls the conveying device so as to cause a relative motion of the bag body and the bag film and a distance between the bag body and the bag film is generated prior to making the bottom seam. The control device controls the conveying device and the welding means so that while welding the bottom seam the welding means extend at least up to the bottom end of the bag body.

A bag-making and packaging apparatus includes a bag-making and packaging unit, a film feeding unit, a splicing device, and a control unit. The control unit allows a bag-making operation to continue by utilizing an auto-feeding function that feeds to the bag-making and packaging unit a film F spliced by the splicing device to take the place of a film F currently being fed to the bag-making and packaging unit. When the control unit judges that at least one of the film feeding unit and the splicing device is malfunctioning in a case where the control unit is utilizing the auto-feeding function, the control unit stops the auto-feeding function and executes a non-auto-feeding mode. The non-auto-feeding mode allows the bag-making operation to be continued by the bag-making and packaging unit and a film roll holding unit that is operable among plural film roll holding units.

A bag-making and packaging apparatus includes a bag-making and packaging unit, a film feeding unit, a splicing device, and a control unit. The control unit allows a bag-making operation to continue by utilizing an auto-feeding function that feeds to the bag-making and packaging unit a film F spliced by the splicing device to take the place of a film F currently being fed to the bag-making and packaging unit. When the control unit judges that at least one of the film feeding unit and the splicing device is malfunctioning in a case where the control unit is utilizing the auto-feeding function, the control unit stops the auto-feeding function and executes a non-auto-feeding mode. The non-auto-feeding mode allows the bag-making operation to be continued by the bag-making and packaging unit and a film roll holding unit that is operable among plural film roll holding units.