Abstract: Continuous method for making a web of draw strip bags, comprising providing a film web (F) wherein a first portion (11) and a second portion (12) overlap each other with free longitudinal side edges (7, 7?) thereof being essentially aligned with each other, back folding a first part (13) having said free side edge (7) of the first portion (11) outwardly away from said second portion (12) along a first fold line (B) by a first hemmer (120), and by folding a first subpart (15) of said first part (13) along a second fold line (C) whereby the free side edge (7) of the first portion (11) is brought into near alignment with said first fold line (B) while a second subpart (14) of said first part (13) of the first portion (11) remains back folded, whereby said first and second subparts (14, 15) of the first portion define a first hem (H1).

Abstract: A cutting apparatus including an apparatus frame and a cutting station, for forming interconnected bags, is provided. The cutting station includes a rotary anvil having an axis of rotation and mounted to a first frame structure, a rotary cutting die disposed adjacent to said rotary anvil and having an axis of rotation parallel to said first axis of rotation, said rotary cutting die including a rotatable cylindrical shaft carrying a die blade, said rotary cutting die being mounted to a frame structure, and an adjustment mechanism for varying the distance between said anvil and said cutting die, said mechanism including a rotatable spindle having threaded portions of different pitch. A first threaded portion engages a threaded portion of said first or said second frame structure and said second threaded portion engaging a threaded portion of said apparatus frame.

Abstract: A cutting apparatus including an apparatus frame and a cutting station, for forming interconnected bags, is provided. The cutting station includes a rotary anvil having an axis of rotation and mounted to a first frame structure, a rotary cutting die disposed adjacent to said rotary anvil and having an axis of rotation parallel to said first axis of rotation, said rotary cutting die including a rotatable cylindrical shaft carrying a die blade, said rotary cutting die being mounted to a frame structure, and an adjustment mechanism for varying the distance between said anvil and said cutting die, said mechanism including a rotatable spindle having threaded portions of different pitch. A first threaded portion engages a threaded portion of said first or said second frame structure and said second threaded portion engaging a threaded portion of said apparatus frame.

Abstract: The invention relates to a wrapping device (300) for wrapping a band around a wound up roll (5?), characterised in:—a storage (301) for said band (303) to be wrapped around said wound up roll (5?),—a first conveyor (330) positionable adjacent said wound roll (5?), for conveying said band (303) to said roll (5?),—said first conveyor (330) comprising a cylindrical drum configured for rotation about an axis (W),—said drum (330) having a surface configured for receiving and transferring said band (303) to said wound up roll (5?) by a vacuum applied to said band (303) via apertures (331) formed in said surface.

Abstract: The invention relates to a roll making apparatus comprising spindles optionally having apertures for pressurized air and/or for applying a vacuum, the spindles being movable between a retracted position and an extended position, a roll engaging face configured to engage a roll carried by a spindle, upon the spindle carrying said roll moving to said retracted position, to move the roll relative to the spindle.

Abstract: The invention relates to a wrapping device (300) for wrapping a band around a wound up roll (5?), characterised in:—a storage (301) for said band (303) to be wrapped around said wound up roll (5?),—a first conveyor (330) positionable adjacent said wound roll (5?), for conveying said band (303) to said roll (5?),—said first conveyor (330) comprising a cylindrical drum configured for rotation about an axis (W),—said drum (330) having a surface configured for receiving and transferring said band (303) to said wound up roll (5?) by a vacuum applied to said band (303) via apertures (331) formed in said surface.

Abstract: Continuous method for making a web of draw strip bags, comprising providing a film web (F) wherein a first portion (11) and a second portion (12) overlap each other with free longitudinal side edges (7, 7?) thereof being essentially aligned with each other, back folding a first part (13) having said free side edge (7) of the first portion (11) outwardly away from said second portion (12) along a first fold line (B) by a first hemmer (120), and by folding a first subpart (15) of said first part (13) along a second fold line (C) whereby the free side edge (7) of the first portion (11) is brought into near alignment with said first fold line (B) while a second subpart (14) of said first part (13) of the first portion (11) remains back folded, whereby said first and second subparts (14, 15) of the first portion define a first hem (H1).

Abstract: The invention relates to a roll making apparatus comprising spindles optionally having apertures for pressurized air and/or for applying a vacuum, the spindles being movable between a retracted position and an extended position; a roll engaging face configured to engage a roll carried by a spindle, upon the spindle carrying said roll moving to said retracted position, to move the roll relative to the spindle.

Abstract: A process of making bags from tubular film (1) by means of passing tubular film through a plurality of stations performing the steps of providing the tubular film with side gussets (8), V-folding the film, providing a perforation which in a final product outlines the neckline (2) of a T-shirt, providing a perforation, forming a severance line (3) of a bag, providing a transverse weld (4), constituting a top end weld, ahead of the perforation, and providing the film with a transverse weld (5), constituting a bottom end weld, behind of said perforation, wherein the process further comprise a step of, prior to providing the tubular film with a weld, interpose between the 2×4 layers of film, a barrier (6) such that four layers of film are disposed on a first side of the barrier and four layers of film are disposed an a second side of the barrier, whereby welding of the 2×4 layers of film, separated by the barrier, in the subsequent steps extends through four respective contiguous layers of film.

Abstract: The invention relates to a method of forming cutouts (4) and transverse welding seams (10) in a sheet of film (5) that is advanced continuously at high velocity, wherein the cutouts (4) constitute areas that are delimited by cutting lines (6, 7), wherein the method comprises the following steps: a) the formation of the cutouts (4) in a sheet section with high sheet tension with cutting lines (7) that extend longitudinally of the sheet of film (5), and cutting lines (7) that extend transversely of the sheet of film, said cutting lines featuring a number of interruptions (8) that constitute support points whereby the cutouts (4) continue to be coherent with the sheet of film (5) at the support points, b) subsequent formation of the transverse welding seams (10) in a sheet section with low sheet tension.