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Film side sealing apparatus with closed-loop temperature control of a heater

A technology of edge sealing and sealing device, applied in packaging sealing/fastening, packaging, transport packaging, etc., can solve the problems of resin accumulation, no hot wire temperature closed-loop controller, etc.

Inactive Publication Date: 2006-06-28
SHRINK PACKAGING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unit does not have a filament temperature closed loop controller and creates resin buildup, requiring frequent maintenance

Method used

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  • Film side sealing apparatus with closed-loop temperature control of a heater
  • Film side sealing apparatus with closed-loop temperature control of a heater
  • Film side sealing apparatus with closed-loop temperature control of a heater

Examples

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Embodiment Construction

[0039] refer to figure 1 and 2 , figure 1 is a front view of an edge seal 10 according to the present invention with the tape support plate removed, and figure 2 for figure 1 A top view of the edge seal 10 is shown. Using the heater 28 , the edge sealing device 10 performs a cutting and sealing operation near the edge of the thermoplastic film 42 covering the wrapper 50 . The edge seal 10 includes a top drive roll 12 and a bottom drive roll 18 , a top idler roll 14 and a bottom idler roll 20 . Two sets of V-belts are provided for driving the film 42 to be sealed through the edge seal 10 along a conveyor 52 (FIG. 6). The top set of V-belts includes two upper V-belts 15 , 16 arranged around and between the top drive roller 12 and idler roller 14 . The bottom set of V-belts includes two lower V-belts 21 , 22 arranged around and between the bottom drive roller 18 and the bottom idler roller 20 . A heater 28 is mounted to the edge seal between the inner package side top and...

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PUM

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Abstract

An edge sealer for shrink wrap machines including a closed loop temperature controller for heaters to maintain the optimum temperature for cutting and sealing two layers of thermoplastic film. The heater consists of a cable or cartridge heater with an internal thermocouple connected to an automatic temperature controller. The heater is mounted to the edge seal between the top and bottom two sets of V-belts mounted around the drive and idler rolls. The V-belt exerts clamping pressure on the film so as to drive the film. In one embodiment, said clamping pressure is generated by means of a nip roll on the film slit side and by means of a low friction belt support guide plate on the film packaging side. In another embodiment, the belt support guide plate is replaced by a series of upper and lower nip rolls, and adjustable hinged clamps provide adjustable pressure on said series of upper and lower nip rolls.

Description

technical field [0001] The present invention relates generally to edge seals of thermoplastic films used to wrap objects of a certain three-dimensional The fusing rod is integral with the closed loop temperature controller and operates essentially in a free air environment, supported by thin clips to reduce heat transfer between the hot fusing rod and the overall assembly. Cut and seal the thermoplastic film within the specified temperature range, while keeping the overall temperature of the entire operating unit close to room temperature. Background technique [0002] Thermoplastic film edge seals commonly used in shrink wrap machines include dual heated wires. The wires are typically two eight inch long heated Nichrome wires mounted in parallel, one above the other. The filaments are spaced about 0.010 inches to 0.015 inches apart (the thickness of a typical business card). Adjusting and maintaining this spacing is critical to accurately sealing and cutting the film, as...

Claims

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Application Information

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IPC IPC(8): B65B51/24
CPCB65B51/18B65B9/06B65B2051/105B65G15/14B65H37/04B65H2404/25B65H2404/261B65H2404/264
Inventor 弗兰克·A·詹姆士杰弗里·C·林德伯格约翰·J·吉尔伯特查尔斯·曼弗雷迪
Owner SHRINK PACKAGING SYST
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