JPH07137721A - Packaging device and package - Google Patents

Abstract

PURPOSE:To provide a shrink package with perforations-each perforation is shortened to prevent spontaneous breaking of a film-to help open the film. CONSTITUTION:In a shrink packaging packaging device, a strip film 11 running lengthwise is tubulated 18 on a former 14, a conveyor feeds objects 23 into the tubular film 18 at equal intervals, a pair of roll sealers 24, 25 cut by melting a tubular film 18, and packages 27 are fed into a heating tunnel 29. A cam 40 that operates at the same cycle as the seal roll 24 intermittently opens a switch 41, which sends intermittent signals through a circuit 43 to operate a printer 32 and tear-off former 33 intermittently. A cutting roller 36 perforates the tubular film 18 at the same intervals as packages, and a printing roll 34 prints the direction in which perforations are to be torn off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package in which a tear for opening is formed in a part of a packaging material and an apparatus for forming the package.

[0002]

2. Description of the Related Art When a heat-shrinkable film covering an article to be packaged is heated and shrunk into a tensioned state, it becomes difficult to open the film. Therefore, as shown in FIG. 4, a piece of a tube film 1 covering the article to be packaged is conventionally used. There is one in which perforations 2 are continuously formed on the side surface, and the perforations 2 can be opened from the portion.

[0003]

However, in a continuous perforation as shown in FIG. 4, the part is easily broken and damaged,
There was a drawback that perforations 2 naturally avoid during the distribution process.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a tube forming means for rolling a continuously fed strip-shaped film along its longitudinal direction to form a tube in order to form a package having perforations that are difficult to avoid. , In front of the tube-making means, the object-to-be-packaged feeding means for feeding the object to be packed into the tube film at equal intervals, and in the moving direction of the film, the tube-making means is rotated at a constant cycle in the rear position. And a cutting means for fusing the tube film between the articles to be packaged therein, and a heating means installed behind the cutting means and heat-shrinking the film of the package separated as described above. In the packaging device, each of the band-shaped films driven by the command signal for transmitting a signal in accordance with one cycle rotation of the cutting device and the signal transmitted by the command device. The display printing breaking eyes forming means and the respective perforation portion to form a perforation in the packaging at the same pitch portion subjected constructed by the printing means.

[0005]

When the tube-making means successively turns the strip-shaped film into a tubular shape from the end, the material-to-be-packaged feeding means feeds the material-to-be-packaged into the tube-shaped film at equal intervals, while the cutting means feeds the tube. The film is melt-cut between each packaged item and each packaged item is sealed in a bag. Since the cutting means performs the fusing action only once for each packaged object, the command means transmits a signal to the break forming means and the printing means in accordance with the cycle of the cutting means, and each packaged object is packaged. Perforations and letters or symbols indicating the presence of the perforations are formed on a part of the film in accordance with the intervals.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a strip-shaped film 11 which is wound around a spindle 10 and supported by a spindle 10 is continuously drawn out by a roll 13 which is rotated by a first motor 12, and the film is attached to a former 14 which is a cylinder forming means. Supply. Further, by pulling the film by rotating a pair of upper and lower endless belts 15 and 16 behind the filmer 14, the strip-shaped film 11 is rounded along the longitudinal direction by the filmer 14, and both edges of the film are centered by the center sealer 17. The film is formed into a tube 18 by being welded to each other.

On the other hand, in front of the former 14, a conveyor 20 is installed as a means for supplying the objects to be packaged, and a second motor 21 is provided.
When the conveyor 20 is rotated by, each packaged object 23 pushed by the attachments 22 installed at equal intervals on the conveyor
Are arranged at equal intervals in the tube film 18. The pair of upper and lower roll sealers 24, 25 provided at the rear of the endless belt 15 are rotated by the power of the third motor 26 to cross-seal the tube film 18 to isolate and seal each packaged object in the film. Each bag 2
Since 7 is separated and each bag 27 is carried into the heating tunnel 29 by the conveyor 28, the heat-shrinkable bag 27 is heat-shrinked and tensioned.

A rotary printing machine 32 and a rotary break forming machine 33 are provided in close proximity to the two rubber rolls 30 and 31 provided in the passage area of the film in front of the formater. A motor provided in the printing machine 32 and a printing roll 34
The central shaft 35 is connected via a one-way clutch. Further, the motor in the tear forming machine 33 and the shaft 37 of the roll cutter 36 are also connected via a one-way clutch. On the other hand, a mechanical or electronic timing generator 42 consisting of a cam 40 and a switch 41 is connected to the shaft of the roll sealer 24, and the timing generator and the printing machine 32 and the tear forming machine 33 are connected to a signal circuit 43. Are connected via.

The feeding interval of the articles to be packaged and the rotation of the seal roll 24 are adjusted so that the seal rolls 24 and 25 rotate once for each interval at which one piece of the article to be packaged 23 is supplied into the tube film 18 by the attachment 22. Keeps the synchronous control, the cam 40 closes the switch 14 each time the seal roll 24 makes one revolution, and the print roll 34 makes the switch closed.
Also, the roll cutter 36 is intermittently rotated. Therefore, as shown in FIG. 2, the film 11 has a short perforation 45.
And an arrow print 56 indicating the direction in which the perforations are broken are formed and displayed, and each perforation corresponds to the interval between the objects to be packaged 23 arranged in the tube film 18. By the subsequent heat treatment, perforations 45 and arrows 46 can be displayed on the bag 27 that is tense as shown in FIG.

[0010]

[Effect] Command means for cutting a tube film, in which the objects to be packaged are transferred at equal intervals, between the objects to be packaged, and transmitting a signal in response to one cycle rotation of the cutting means, Since the tear forming means and the printing means that operate according to the command means are provided, it is possible to perform perforation and arrow printing on the tube film at the same intervals as the intervals of the objects to be packaged. Compared to the case where perforations are formed on the entire bag as described above, the degree of breakage of perforations is less and it is effective in protecting the product.

[Brief description of drawings]

1 is a side view of the entire apparatus

FIG. 2 is a plan view of a cylindrical part.

FIG. 3 is a front view of the package.

FIG. 4 is a perspective view of a conventional example

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Band-shaped film 14 ... Cylinder manufacturing means 20 ... Packaged object supply means 23 ... Packaged object 24,25 ... Cutting means
29 ... Heating means 32 ... Printing means 33 ... Break forming means 34 ... Printing roll 36 ... Roll sealer 42 ... Command means 45 ... Perforation 46 ... Arrow printing

Claims (2)

[Claims] 1. A tube-making means for rolling a continuously fed strip-shaped film along the longitudinal direction thereof to form a tube, and an object to be packaged in the tube film at an equal interval in front of the tube-making means. A means for supplying a packaged object,
A cutting means that rotates in a constant cycle in the rear part of the tube forming means in the moving direction of the film and melts and cuts the tube film between the objects to be packaged therein, and is installed in the rear part of the cutting means. And a heating means for heat-shrinking the film of the package separated as described above, in a packaging device, a command means for transmitting a signal in response to one cycle rotation of the cutting means, and a transmission signal from the command means. A wrapping device which is driven by a tear forming means for forming perforations at the same pitch portion as the articles to be wrapped in the strip-shaped film and a printing means for performing display printing on the perforation portions. 2. An object to be packaged is hermetically wrapped with a film and the film is heat-shrinked, and a part of the film is printed with letters and symbols that clearly indicate the perforations and the positions where the perforations are present. Packaging.