The present invention relates to a welding machine for continuous welding of two layers of plastic film material together in a welding pattern, including a welding drum, welding means arranged on the peripheral surface of the welding drum that exhibits a welding pattern, a heating arrangement arranged to heat the welding means to a welding temperature, an endless welding band, a set of band guidance rollers comprising a first application roller and a second application roller arranged to apply the welding band to the welding means on the surface of the welding drum over a peripheral extend of at least 900° of the welding drum with a force radial to the welding drum in a first operational mode of the welding machine, the set of band guidance rollers comprising at least one displaceable tensioning roller for maintaining a tension of the welding band, a web guidance arrangement for guiding the two layers of plastic film material in between the welding drum and the welding band, and a control means for controlling the operation of the welding machine, wherein the machine comprises one or more separation rollers, and is arranged in a second operational mode of the welding machine to displace the one or more separation rollers from a first position thereof and in between the welding means on the peripheral surface of the welding drum and the two layers of plastic film material to a second position of the one or more separation rollers where the two layers of plastic film material and the welding band are separated from the periphery of the welding drum by means of the separation rollers. Furthermore is disclosed the use of such welding machine for forming pockets between the two layers of plastic film material, in particular closed pockets for air cushions.
The invention relates to a web-shaped material with perforated lines, whereby, when tearing the material along the perforated lines, for example at the place of use that could be in a supermarket, units can be formed for use as a kind of glove or mitten.
A welding machine (1) for continuous welding of two layers of plastic film material (2', 2'') together in a welding pattern is disclosed, comprising a welding drum (10), welding means (11) arranged on the peripheral surface of the welding drum (10) and exhibiting the welding pattern, heating arrangement arranged to heat the welding means (11) to a welding temperature, an endless welding band (12), a set of band guidance rollers (20, 21, 22, 23) comprising a first application roller (21) and a second application roller (22) arranged to apply the welding band (12) to the welding means (11) on the surface of the welding drum (10) over a peripheral extend of at least 900° of the welding drum (10) with a force radial to the welding drum (10) in a first operational mode of the welding machine (1), the set of band guidance rollers comprising at least one displaceable tensioning (23) roller for maintaining a tension of the welding band (12), a web guidance arrangement (30, 31) for guiding the two layers of plastic film material (2', 2'') in between the welding drum (10) and the welding band (12), and control means for controlling the operation of the welding machine (1), wherein the machine comprises one or more separation rollers (41, 42), and is arranged in a second operational mode of the welding machine (1) to displace the one or more separation rollers (41, 42) from a first position thereof and in between the welding means (11) on the peripheral surface of the welding drum (10) and the two layers of plastic film material (2', 2'') to a second position of the one or more separation rollers (41, 42) where the two layers of plastic film material (2', 2'') and the welding band (12) are separated from the periphery of the welding drum (10) by means of the separation rollers (41, 42). Furthermore is disclosed the use of such welding machine for forming pockets between the two layers of plastic film material, in particular closed pockets for air cushions.
A welding machine (1) for continuous welding of two layers of plastic film material (2', 2'') together in a welding pattern is disclosed, comprising a welding drum (10), welding means (11) arranged on the peripheral surface of the welding drum (10) and exhibiting the welding pattern, heating arrangement arranged to heat the welding means (11) to a welding temperature, an endless welding band (12), a set of band guidance rollers (20, 21, 22, 23) comprising a first application roller (21) and a second application roller (22) arranged to apply the welding band (12) to the welding means (11) on the surface of the welding drum (10) over a peripheral extend of at least 900° of the welding drum (10) with a force radial to the welding drum (10) in a first operational mode of the welding machine (1), the set of band guidance rollers comprising at least one displaceable tensioning (23) roller for maintaining a tension of the welding band (12), a web guidance arrangement (30, 31) for guiding the two layers of plastic film material (2', 2'') in between the welding drum (10) and the welding band (12), and control means for controlling the operation of the welding machine (1), wherein the machine comprises one or more separation rollers (41, 42), and is arranged in a second operational mode of the welding machine (1) to displace the one or more separation rollers (41, 42) from a first position thereof and in between the welding means (11) on the peripheral surface of the welding drum (10) and the two layers of plastic film material (2', 2'') to a second position of the one or more separation rollers (41, 42) where the two layers of plastic film material (2', 2'') and the welding band (12) are separated from the periphery of the welding drum (10) by means of the separation rollers (41, 42). Furthermore is disclosed the use of such welding machine for forming pockets between the two layers of plastic film material, in particular closed pockets for air cushions.
The invention relates to a web-shaped material (1) with perforated lines (8), whereby, when tearing the material along the perforated lines (8), for example at the place of use that could be in a supermarket, units (2) can be formed for use as a kind of glove or mitten.
B65D 35/22 - Pliable tubular containers adapted to be permanently deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid materialHolders therefor with two or more compartments
6.
A PROTECTIVE BAG FOR A HAND, A WEB-SHAPED MATERIAL AND UNITS FORMED ON THE BASIS OF THE WEB-SHAPED MATERIAL
The invention relates to a web-shaped material (1) with perforated lines (8), whereby, when tearing the material along the perforated lines (8), for example at the place of use that could be in a supermarket, units (2) can be formed for use as a kind of glove or mitten.
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.
B26F 1/20 - Perforating by slitting, i.e. forming cuts closed at their ends without removal of material with tools carried by a rotating drum or similar support
B26D 7/26 - Means for mounting or adjusting the cutting memberMeans for adjusting the stroke of the cutting member
The present invention relates to cutting apparatus (20) including an apparatus frame (21) and a cut-ting station (26), for forming plastic bags interconnected along trans-verse lines of weakness, said cutting station (26) comprising a rotary anvil (28) having a first axis of rotation (A1) and mounted to a first frame structure (70), a rotary cutting die (30) disposed adjacent to said rotary anvil (28) and having a second axis of rotation (A2) substantially parallel to said first axis (A1) of rotation, said rotary cutting die (30) including a rotatable cylindrical shaft (32) carrying a die blade, said rotary cutting die (30) being mounted to a second frame structure (50), and an adjustment mechanism (M) for varying the distance between said anvil (28) and said cutting die (30), said mechanism (M) including a rotatable spindle (105, 105') having a first threaded portion (107, 107') and a second threaded portion (106, 106'), the pitch of said first threaded portion (107, 107') being different from the pitch of said second threaded portion (106, 106'), said first threaded portion (107, 107') engaging a threaded portion (75, 75') of said first or said second frame structure (50, 70) and said second threaded portion (106, 106') engaging a threaded portion (160, 160') of said apparatus frame (21).
B26F 1/20 - Perforating by slitting, i.e. forming cuts closed at their ends without removal of material with tools carried by a rotating drum or similar support
9.
Wrapping device for a machine for winding-up a web material, and a machine for winding-up a web material including the wrapping device
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.
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).
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.
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).
The invention relates to a roll making apparatus (1) comprising spindles (30, 31, 32, 33) optionally having apertures (60) for pressurized air and/or for applying a vacuum, the spindles (30, 31, 32, 33) being movable between a retracted position and an extended position, a roll (5) engaging face (40) configured to engage a roll (5) carried by a spindle (30, 31, 32, 33), upon the spindle (30, 31, 32, 33) carrying said roll (5) moving to said retracted position, to move the roll (5) relative to the spindle (30, 31, 32, 33).
The invention relates to an interleaving device (100) and a method for overlapping portions (102) of a plastic web with leading ends overlapping trailing ends, for subsequent winding up said overlapped portions as a roll (5), the device comprising a feeding section (110) comprising a set of feed rolls (111a, 111b) for advancing a web at a first speed, the feeding section further comprising a set of nip rolls (112a, 112b) for separating the web into portions of web, a receiving section (130) for receiving a leading end (102a) of said portions at a second lower speed, and an advancing section (150) for advancing the leading end of the portions from the feeding section to the receiving section, the advancing section further comprising a deflection device (156) for deflecting the trailing end of said portions by providing a downwardly oriented force on the trailing end of said portions, wherein the advancing section comprises one or more vacuum belts (151) each having along the length thereof one vacuum section (157) or a plurality of spaced apart vacuum sections, said vacuum section(s) being arranged for holding the leading end of a respective portion.
An apparatus for welding at least two overlapping sheetings of hot-weldable material to each other, such as two plastics film sheetings, said apparatus comprising a roller (1) which is rotatably journalled about an axis of rotation and has an essentially cylindrical surface (3); and wherein a welding face (7) is configured on the roller (1), which welding face has the same shape as the welding seam it is desired to provide on the two sheetings and which extends essentially all the way around the roller (1) on the surface thereof, and wherein means are further configured for local heating of the welding face to a temperature close to or higher than the melting temperature of the hot- weldable material. The apparatus is configured for such reduction of the transfer of heat energy from the welding face (7) on the roller to the sheetings, while said sheetings remain in contact with the cylindrical surface of the roller, that the risk of fusing the sheetings can be minimised.
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 2x4 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 2x4 layers of film, separated by the barrier, in the subsequent steps extends through four respective contiguous layers of film.
B29C 65/00 - Joining of preformed partsApparatus therefor
B29C 65/02 - Joining of preformed partsApparatus therefor by heating, with or without pressure
B31B 19/86 - Forming integral handles or mounting separate handles
B31B 23/00 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents, from webs, e.g. from flattened tubular webs
B31B 19/64 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents and having means for uniting opposed surfaces or edges, or for taping by applying heat or pressure
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