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AssigneeMolins Limited
InventorsAlan Michael Aindow, Andrew John Cleall, Philip Gordon Haddow, David Robert Seaward, Geoffrey William Vernon, Peter Ernest Willett, Stephen William Bird
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Transverse cuts are made in a web using a cutter/anvil combination which is subjected to high frequency vibration, preferable ultrasound. In one arrangement, particularly for cutting tea bag webs, a rotary cutter drum (4) cooperates with an ultrasonically-vibrated anvil 12. The web may be simultaneously sealed and cut by means of a modified drum (202) having sealer/cutter elements (208, 210). In other arrangements, particularly for cutting cork paper on a machine for assembling filter cigarettes, the paper is severed on a drum (106, 122, 192, 350) cooperating with an ultrasonically-vibrated anvil (110, 194, 312) or directly on an ultrasonically-vibrated drum (144, 160, 170, 180).
Apparatus for making successive longitudinally-spaced cuts in a web, comprising means for moving the web, means for periodically bringing a cutter into the region of the web, the cutter being carried by a rotary drum and cooperating with an anvil in a cutting region, and means for producing high frequency relative vibration between the cutter and the web, so that the cutter makes at least one cut having at least a portion extending in a direction transverse the web, wherein the cutter is arranged to sever successive portions of the web from the remainder of the web, said rotary drum carrying a plurality of said cutters in equally spaced peripheral positions, said drum being provided with suction means for retaining said portion in spaced positions between said cutters on the periphery of said drum after severing, and means for transferring said spaced portions from said drum at a position angularly displaced from said position at which said portions are severed from the web, including adjustable means for mounting the anvil so as to adjust the spacing between the anvil and the cutters, said adjustable means including means determining said spacing including rotatable means acting between the anvil and the drum.
Apparatus for making successive longitudinally-spaced cuts in a web, comprising means for moving the web, means for periodically bringing a cutter into the region of the web, the cutter being carried by a rotary drum and cooperating with an anvil in a cutting region, and adjustable means for mounting the anvil so as to adjust the spacing between the anvil and the cutters, said adjustable means including means determining said spacing including rotatable means acting between the anvil and the drum, and means for producing high frequency relative vibration between the cutter and the web, so that the cutter makes at least one cut having at least a portion extending in a direction transverse of the web, wherein the cutter has a cutting edge arranged to sever portions of predetermined close shape from the web, the web comprising at least two layers of material carrying spaced doses of material to be packaged between the layers and said severed portions of the web corresponding to individual packages containing said material to be packaged.
Apparatus for making successive longitudinally-spaced cuts in a web, comprising means for moving the web, means for periodically bringing a cutter into the region of the web, the cutter being carried by a rotary drum and cooperating with an anvil in a cutting region, ultrasound generator means connected to said anvil for producing high frequency relative vibration between the cutter and the web, so that the cutter makes at least one cut having at least a portion extending in a direction transverse of the web, the cutter being arranged to sever successive portions of the web from the remainder of the web, said rotary drum carrying a plurality of said cutters in equally spaced peripheral positions and being provided with suction means for retaining portions in said spaced positions between said cutters on the periphery of said drum after severing, means for transferring said spaced portions from said drum at a position angularly displaced from the position at which said portions are severed from the web, the ultrasound generator means and anvil being supported by a first frame member which is adjustably supported by a second frame member carrying roller means which contact said rotary drum and determine the position of the second frame member relative to said cutters, and positional adjustable means for setting the position of the first frame member relative to the second frame member, whereby the spacing between the anvil and the cutters may be precisely determined.
Dependencies are inferred from the claim text.