The severing means includes a cutting edge heated by a heater within the cutting edge, which is positioned adjacent the movable upper seal bar. The lower seal bar is coated with Teflon.A sealer slitter apparatus for a bag making machine operable to produce thermoplastic resin film bags, said sealer slitter apparatus comprising:sealing means for applying heat to and transversely sealing together two opposing layers of a tubular web of thermoplastic resin film, said sealing means including,at least one stationary lower seal bar positioned beneath and extending transversely across an intended path of travel of a tubular web of resin film, said at least one stationary lower seal bar comprising a U-shaped seal bar,at least one upper seal bar positioned above, mutually opposed to and in vertical alignment with said stationary lower seal bar, wherein a tubular web of thermoplastic resin film may be operably fed between said upper and said lower seal bars.
The difficulties suggested in the preceeding are not intended to be exhaustive but rather are among many which may tend to reduce the effectiveness of and product quality associated with present bag making machine sealing and slitting devices. A single bar forms a transverse seal on one end of a bag, while a "U" shaped lower seal bar transversely seals both the top and bottom of sequential bags, forming what is commonly known as "T-shirt" bags. The tubular web, which is unrolled from a spool, is intermittently fed into a bag making machine where heat is transversely applied to the web in order to form a weld seal between the two layers of the web. are produced from a long tubular web of thermoplastic synthetic resin film. The Teflon tape may be replaced as needed without removing the entire upper seal Tea Bag Packing Machine bar. More specifically, this invention relates to a sealer slitter apparatus which transversely seals together and severs two layers of a tubular web of thermoplastic resin film, thereby forming a bag.
To maintain machine efficiency, the sealing and severing operations occur essentially simultaneously.It is a specific object of the invention to provide a bag making machine sealer slitter apparatus which will minimize the frequency of interruption of a bag making operation. In order to remove the carbon by-product of the thermoplastic film which adheres to the cutting edge, the cutting edge is heated to a degree which allows for combustion and self removal of the carbon byproduct from Flow Packing Machine the cutting edge. The temperature necessary to combust the carbon by-product is much greater than the operable temperature of the seal bars.
Because the cutting edge is recessed above the movable seal bar, the cutting edge must descend toward the stationary lower seal bar faster than the movable upper seal bar.Guide plates are provided on inner lateral surfaces of the "U" shaped movable upper seal bars to insure that the cutting edge transversely severs the thermoplastic web substantially parallel to the transverse weld beads formed by the sealing means. A cutting edge intersects and transversely severs the web adjacent the seal in order to complete formation of a bag. The sealing and severing means are therefore driven by separate reciprocating mechanisms.http://www.china-packmachine.com/product/tea-bag-packing-machine/
The difficulties suggested in the preceeding are not intended to be exhaustive but rather are among many which may tend to reduce the effectiveness of and product quality associated with present bag making machine sealing and slitting devices. A single bar forms a transverse seal on one end of a bag, while a "U" shaped lower seal bar transversely seals both the top and bottom of sequential bags, forming what is commonly known as "T-shirt" bags. The tubular web, which is unrolled from a spool, is intermittently fed into a bag making machine where heat is transversely applied to the web in order to form a weld seal between the two layers of the web. are produced from a long tubular web of thermoplastic synthetic resin film. The Teflon tape may be replaced as needed without removing the entire upper seal Tea Bag Packing Machine bar. More specifically, this invention relates to a sealer slitter apparatus which transversely seals together and severs two layers of a tubular web of thermoplastic resin film, thereby forming a bag.
To maintain machine efficiency, the sealing and severing operations occur essentially simultaneously.It is a specific object of the invention to provide a bag making machine sealer slitter apparatus which will minimize the frequency of interruption of a bag making operation. In order to remove the carbon by-product of the thermoplastic film which adheres to the cutting edge, the cutting edge is heated to a degree which allows for combustion and self removal of the carbon byproduct from Flow Packing Machine the cutting edge. The temperature necessary to combust the carbon by-product is much greater than the operable temperature of the seal bars.
Because the cutting edge is recessed above the movable seal bar, the cutting edge must descend toward the stationary lower seal bar faster than the movable upper seal bar.Guide plates are provided on inner lateral surfaces of the "U" shaped movable upper seal bars to insure that the cutting edge transversely severs the thermoplastic web substantially parallel to the transverse weld beads formed by the sealing means. A cutting edge intersects and transversely severs the web adjacent the seal in order to complete formation of a bag. The sealing and severing means are therefore driven by separate reciprocating mechanisms.http://www.china-packmachine.com/product/tea-bag-packing-machine/
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