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Patent name Film feeding device for thin film three-dimensional packaging machine Patent applicant Shantou Songye Packaging Machinery Plant Principal Applicant Address 515021 No. 39, Newspaper Road, Shantou City, Guangdong Province (within the factory) Inventor Cai Yongsheng Application (patent) No. 200420044993.4 Date of Application 2004.04.17 Approval date Approval announcement number 2723339 Approval announcement date 2005.09.07 Instruction CD-ROM number D0536 Main classification number B65B41/00 Classification number B65B41/00 Subsidiary number Original application number Priority item Abstract A film three-dimensional packaging machine film feeding device , Including the film feeding roller, the film clamping roller and the film feeding roller and the film feeding roller drive mechanism, characterized in that: the film feeding roller drive mechanism includes a servo motor or a stepping motor that is connected with the film feeding roller. And by the programmable logic controller or microcontroller and its peripheral circuit motor control circuit. The thin film three-dimensional packaging machine using the utility model has the capability of identifying the photoelectric color mark on the packaging film and automatically adjusting the position (positioning) of the packaging film according to the detection condition of the photoelectric color mark, not only for the packaging machine'target=_blank>transparent film. Packaging, but also for the packaging of patterned colored packaging film. Use the man-machine interface or data setting component to input relevant data to adjust the length of the packaging film. The operation is simple and time-saving, the loss of raw materials is small, and the length of the packaging film is set accurately. In this way, the packaging machine can accurately deliver the film during operation, and the length of the packaging film can be easily adjusted, and can be flexibly adapted to the packaging of various specifications of products. Sovereignty item 1. A film feeding device of a film three-dimensional packaging machine, which comprises a film feeding roller, a film clamping roller closely attached to the film feeding roller, and a film feeding roller driving mechanism, wherein the driving mechanism of the film feeding roller comprises: A servomotor or a stepping motor drive connected with a film feeding roller, and a motor control circuit composed of a programmable logic controller or a single-chip microcomputer and peripheral circuits thereof; wherein the peripheral circuit comprises a photoelectric eye for detecting a photoelectric color mark, and a connection The motor driver between the output of the programmable logic controller or microcontroller and the motor, the output of the photocell is connected to the programmable logic controller or the input of the microcontroller. International Application International Announcement Date of Entry into the Country Patent Agency Shantou Chaorui Patent Co., Ltd. Agency Address Agent Tang Ruiwen