Device for cutting and welding plastic band for use in automatic strapping machine
阅读：908发布：2023-12-23
专利汇可以提供Device for cutting and welding plastic band for use in automatic strapping machine专利检索，专利查询，专利分析的服务。并且A device for cutting and welding a plastic band for use in an automatic strapping machine, which comprises: a table provided with a cutting and welding mechanism thereunder; an upper band holding member which is supposed to hold the tip of the strapping band when said band is completely fed to cover the full length of the bottom of the table; a lower band holding member having a projection, which is disposed under the upper band holding member; and pectinate heat blades which are supposed to melt and penetrate the overlapped two portions of the band and thereafter weld them by the energy of a press member.，下面是Device for cutting and welding plastic band for use in automatic strapping machine专利的具体信息内容。
1. A device for cutting and welding a plastic band applicable to an automatic strapping machine for the purpose of strapping the package with a thermoplastic band, which is characterized by the provision of a table capable of longitudinal movement under the package, an upper band holding member installed beneath one side of said table so as to cooperate therewith and be capable of vertical movement in relation thereto, a press member installed beneath the other side of said table so as to be capable of longitudinal movement, a lower band holding member installed beneath said upper band holding member so as to be capable of vertical movement, a heat member installed beneath said press member so as to be capable of vertical movement, said heat member being provided with plural heat blades disposed parallel to the direction of strain of said band, and means for cutting cutting said band.
2. A device for cutting and welding a plastic band as defined in claim 1, wherein the width of said table is almost equal to the total of the width of said lower band holding member and the width of said heat member.
3. An apparatus for welding the overlapping end portions of an elongated thermoplastic strapping band, such as for securing said band in surrounding relationship to a package, comprising: a movable table adapted to have a package positioned thereon; a first band holding member positioned beneath said table and means mounting said first holding member for vertical movement for permitting one of said end portions of said band to be clamped between said table and said first holding member; a second band holding member disposed below said first band holding member and means mounting said second holding member for vertical movement toward said first holding member for permitting the other end portion of said band member to be clamped between said first and second holding members; heating means disposed below said table and means mounting same for movement toward and away from said table, said heating means including a heating head disposed for engaging and melting the overlapping end portions of said band, whereby movement of said heating means toward said table causes the overlapping end portions of said band means to be positioned between said table and said heating head; and a pressing member disposed below said table and means mounting said pressing member for substantially horizontal movement between a first position wherein said pressing member is disposed between the heating head and the overlapping end portions of said band and a second position wherein said pressing member is laterally spaced from said first position, whereby upward movement of said heating means when said pressing member is in said first position causes said pressing member to cover said heating head so that said pressing member causes the previously heated overlapping end portions of said band to be pressed against the undersurface of said table.
4. An apparatus according to claim 3, further including means coacting with said table for moving same horizontally for permitting said table to be withdrawn from between said package and the overlapping portions of said band; said first band holding member comprising a lever pivotally mounted on said table and disposed for swinging movement within a substantially vertical plane, said lever being horizontally movable with said table portion, said lever having a band engaging portion disposed thereon adjacent the free end thereof; and spring means coacting between said lever and said table for normally maintaining said band engaging portion spaced from the undersurface of said table.
5. An apparatus according to claim 4, wherein the movement of said table, said second band holding member, said heating means and said pressing member are individually controlled by means of a plurality of swingable driving levers, and a plurality of rotatable drive cams respectively disposed in driving engagement with said driving levers for controlling the movement thereof.
6. An apparatus according to claim 4, wherein said heating head includes a plurality of elongAted and substantially parallel blades which at least partially penetrate and melt the overlapping end portions of said band, and wherein said pressing member includes a caplike portion which covers said blades when said pressing member is in said first position.
7. An apparatus according to claim 3, wherein said heating head includes a plurality of elongated and substantially parallel blades which are adapted to at least partially penetrate and melt the overlapping end portion of said band, said blades extending in a direction substantially parallel to the direction of strain of said band.
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