# US 8,539,741 B2 · Seal and cut method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,741 B2 - Document ID: US8539741B2 - Status: Granted - Kind: B2 - Application number: 12/703,434 - Filed: 2010-02-10 - Published: 2011-08-11 - Granted: 2013-09-24 - Earliest claimed: 2010-02-10 - Assignees: Triangle Package Machinery Company - Applicants: Vadim A. Lubezny; Steven P. Bergholt - Inventors: Vadim A. Lubezny; Steven P. Bergholt - Web page: https://patentgrep.com/patent/US8539741B2 ## CPC - B65B 51/303: {reciprocating along only one axis} - B29C 65/02: by heating, with or without pressure - B29C 65/7451: {the severing tool and the welding tool being movable with respect to one-another} - B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)} - B29C 66/4312: {for making flat seams in tubular or hollow articles, e.g. transversal seams} - B29C 66/8181: {characterised by the cooling constructional aspects} - B29C 66/8225: {Crank mechanisms} - B29C 66/8246: {Servomechanisms, e.g. servomotors} - B29C 66/83543: {cooperating flying jaws} - B29C 66/8491: {welding through a filled container, e.g. tube or bag} - B29C 65/08: using ultrasonic vibrations {(non-plastics element to plastics elements B29C65/645)} - B29C 65/18: using heated tools - B29C 66/8167: {Quick change joining tools or surfaces} - B29C 66/9592: {in explicit relation to another variable, e.g. X-Y diagrams} - B65B 9/207: the web advancing continuously (B65B9/22 takes precedence) - B65B: MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING (bundling and pressing devices for cigars A24C1/44; devices for tensioning and securing binders adapted to be supported by the article or articles to be bound B25B25/00; applying closure members to bottles, jars or similar containers B67B1/00-B67B6/00; concurrent cleaning, filling and closing of bottles B67C7/00; emptying bottles, jars, cans, casks, barrels or similar containers B67C9/00) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) ## Abstract A method for forming a bag includes moving a film at a first velocity, forming a seal on the moving film with a sealing device moving at the first velocity, moving the film and the sealing device relative to each other and thereby moving the sealing device out of alignment with the seal, aligning a film separation device with the seal on the moving film, moving the film separation device with the moving film, and separating the film across the seal with the film separation device. A sealing and cutting device includes a carriage moveable along a longitudinal axis and upper and lower grippers coupled to the carriage. A sealing device and a cutting device are positioned between the upper and lower grippers. ## Claims ### Claim 1 A method for forming a bag comprising: moving a film at a first velocity; forming a seal on said moving film with a sealing device moving at said first velocity, wherein said sealing device comprises a pair of jaws each comprising an upper and lower gripper formed on each of said jaws and a sealing member, wherein said sealing member is positioned between said upper and lower grippers, and wherein said forming said seal on said moving film comprises closing said pair of jaws and gripping said film with said upper and lower grippers; moving said film and said sealing device relative to each other and thereby moving said sealing device out of alignment with said seal; aligning a film separation device with said seal on said moving film and moving said film separation device with said moving film, wherein said film separation device is coupled to at least one of said pair of jaws and is positioned between said upper and lower grippers of said at least one of said pair of jaws; and separating said film across said seal with said film separation device. ### Claim 2 (depends on 1) The method of claim 1 wherein said film separation device comprises a knife. ### Claim 3 (depends on 1) The method of claim 1 wherein said separating said film comprises laterally moving said film separation device relative to said upper and lower grippers of said at least one of said pair of jaws. ### Claim 4 (depends on 1) The method of claim 1 wherein said forming said seal comprises laterally moving said sealing member relative to said upper and lower grippers on each of said pair of jaws. ### Claim 5 (depends on 1) The method of claim 1 wherein said moving said film and said sealing device relative to each other comprises accelerating or decelerating said sealing device. ### Claim 6 (depends on 5) The method of claim 5 wherein said film is maintained at said first velocity while said sealing device is accelerated or decelerated. ### Claim 7 (depends on 1) The method of claim 1 wherein said moving said film and said sealing device relative to each other further comprises accelerating or decelerating said film. ### Claim 8 (depends on 7) The method of claim 7 wherein said sealing device is maintained at said first velocity while said film is accelerated or decelerated. ### Claim 9 (depends on 1) The method of claim 1 wherein said moving said film and said sealing device relative to each other comprises accelerating or decelerating said film and said sealing device. ### Claim 10 (depends on 1) The method of claim 1 wherein said sealing device comprises a heat seal bar. ### Claim 11 (depends on 1) The method of claim 1 wherein said sealing device comprises an ultrasonic sealing device. ### Claim 12 (depends on 1) The method of claim 1 wherein said moving said film and said sealing device relative to each other comprises translating said sealing device along a vertical direction. ### Claim 13 (depends on 12) The method of claim 12 wherein said translating said sealing device along a vertical direction comprises translating said sealing device on a vertical guide. ### Claim 14 A method for forming a bag comprising: moving a film at a first velocity; gripping said film moving at said first velocity a first time with a pair of jaws; forming a seal on said moving film with a sealing device moving at said first velocity; releasing said film from said pair of jaws a first time after said forming said seal; moving said film and said sealing device relative to each other and thereby moving said sealing device out of alignment with said seal; aligning a film separation device with said seal on said moving film and moving said film separation device with said moving film; gripping said film a second time with said pair of jaws when said film separation device is aligned with said seal; separating said film across said seal with said film separation device; and releasing said film from said pair of jaws a second time after said separating said film across said seal with said film separation device.