JPS5854029B2 - Bag, its manufacturing method and its manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a protective cardboard sheet that is folded in half like a book cover, and a bag of cards that is folded in half at least once along a fold line parallel to the edge of the cardboard sheet. The present invention relates to a bag made of paper tape that is adhered between both halves of a board sheet with an adhesive and whose side edges are sealed, a method for manufacturing the bag, and an apparatus for manufacturing the same.

Bags made of paper tape and protective cardboard sheets have been known for a long time, including books and cassettes.

It is used to package and mail flat items such as records.

Since such products are generally mass-produced, it is important to efficiently manufacture them at a low level, but the above-mentioned types of bags are made by attaching a protective cardboard sheet with paper tape folded in half. Due to its limited structure, it cannot be efficiently produced continuously, and the equipment that manufactures it requires downtime with slow and rapid operation steps, which substantially reduces production capacity. This is a factor.

An object of the present invention is to provide a bag that can be efficiently and continuously produced.

An object of the present invention is to provide a method for manufacturing the same and a device for manufacturing the same.

To achieve this objective, the bag of the present invention has four layers of paper tape, three of which are folded along longitudinal and transverse creases and glued onto one half of a cardboard sheet for protection. The remaining layer is glued to the other half of the protective cardboard sheet.

The bag of the present invention is characterized in that during the first step, the continuous paper tape partially extends beyond the edge of the cardboard sheet, and at least approximately half of the paper tape is covered with adhesive applied at the first gluing position. Glue the paper tape to both ends of the cardboard sheet so that it extends outside the line.During the second step, the length of the glued part and the length of the unglued part are measured on the surface of the pasted paper tape. By applying adhesive intermittently according to the length of the side edges of the completed bag so that the sides are substantially equal, and by folding the paper tape in half along the longitudinal fold line. The second gluing process involves gluing the paper tapes together over the length of the sections, with the gluing applied in position, and cutting the resulting web to form a bag with a section and an unglued section. During the third step, glue is applied in strips on the outside surface of the folded paper tape, and the semi-finished products of the buttons and cut bags are scaled horizontally like a book cover. By folding in two along the fold line, the third gluing is produced by gluing the surfaces of the paper tapes to each other, breaking the applied adhesive in position, and the equipment used for its production is a continuous cardboard A roll for cardboard sheets for feeding the sheets, two rolls for paper tape for feeding two paper tapes on the edges of the cardboard sheets, a second roll for applying adhesive between the cardboard sheets and the paper tapes. 1 Gluing section, pressure roller for pressing the paper tape and adhering the paper tape to the edge of the cardboard sheet, gluing section with approximately equal length corresponding to the length of the side edge of the bag body, and gluing section. A second gluing section that intermittently applies adhesive to the paper tape so that the parts that are not glued are alternately arranged, and a member that folds the paper tape in two along the longitudinal crease line of the paper tape. folding mechanism,
For the second gluing, glue the adhesive applied at the part and paste the paper tape at the folded position.Press the roller to attach the formed web to the side edge. The outer surface of the folded paper tape is cut into semi-finished bags of a predetermined length, with continuous parts that are not glued. A third D-attached section for applying adhesive to the folding member for folding the cut half-finished bag along the transverse fold line in the transport direction, and a folding member for folding the cut half-finished bag along the transverse fold line in the transport direction; It is characterized by a pressure folding roller that presses and folds the semi-finished bag.

The present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a diagram showing a side view of the bag manufacturing apparatus of the present invention, and is also a diagram for explaining various steps of continuous production.

2 is a plan view of the apparatus shown in FIG. 1, and FIG. 3 is a perspective view of the bag of the present invention.

A continuous cardboard sheet 2 is drawn from a cardboard sheet roll 1 and a continuous paper tape 4 is drawn from two paper tape rolls 3.

Roll for cardboard sheets 1. The paper tape roll 3 is placed in such a position that the paper tape 4 runs along the edge of the cardboard sheet 2 and partially protrudes from the edge of the cardboard sheet 2.

A first gluing step 5 involves applying a strip of adhesive to the edge of the cardboard sheet 2 by means of an adhesive sprayer or other device for applying adhesives, which is known per se, and then the paper tape 4 is applied to the edge of the cardboard sheet 2 by means of a pressure roller 60. It is glued to the cardboard sheet 2 in between.

The second glue is on section 7':J? Then, adhesive is applied to the surface of the paper tape 40 adhered to the cardboard sheet 2 at the position indicated by the adhesive line 8 in FIG.

At this second gluing position, the adhesive is intermittently supplied so that the gluing portions are alternately glued and unglued portions.

9, the length of the portion corresponds substantially to the length of the side edge of the product bag.

Then, the paper tape 4 is folded in half along a longitudinal fold line by a paper tape folding mechanism 9.

Preferably, the fold line lies somewhat inside the edge of the cardboard sheet 2.

As the folding mechanism, a known guide bar and (residue) roller can be used.

The folded paper tape 4 is pressed by a pressure roller 10 in the folded state, and the portion marked 9 is adhered.

In the non-glued portions, which correspond substantially to the length of the portions, the folded paper tapes 4 are of course not glued to each other.

The thus obtained cardboard sheet 2 to which the paper tape 4 folded in half is adhered will be referred to as a web.

After leaving the pressure roller 10, the web is fed continuously at a constant speed to a cutting mechanism, where it is cut by a roller 13.
It is cut by the blade 12 provided on the cutting roller 11.

The cutting is performed at a constant length corresponding to the circumferential length of the cutting roller 11.

In order to make the distance between each cut equal to twice the length of the glued part or the length of the glued part plus the unglued part, the second glued part should be glued at section 7. The application operation is synchronized with the rotational movement of the cutting roller 11 so that adhesive is applied during the first rotation of the cutting roller 11 and no adhesive is applied during the second rotation of the cutting roller 11. It's like that.

Immediately after exiting the cutting mechanism, a third strip of adhesive is applied to the outer surface of the folded paper tape 4 toward the section 14 to form a line 15 of adhesive.

Application of the adhesive may be done either continuously or intermittently.

The web that has been cut and further coated with adhesive will be referred to as a semi-finished bag product.

In the next step, the semi-finished bag is folded.

Although there are various devices that can be used in this method, only one simple example consisting of a folding member and a pressure folding roller will be described here.

In the third gluing process, as soon as the semi-finished bag is sent out from the part 14, a folding blade 16' is lowered at the center of the semi-finished bag in a direction transverse to the conveying direction.

That is, the glued part is on the left side in FIG. 1 of the lowered position, and the non-glued part is on the right side in FIG. 1.

The folding blade 16 completes the folding of the semi-finished bag with the help of the matching member 17, and pressurized can folding roller 18
The closed transverse fold line 2a of the semi-finished bag is supplied to the container.

The final gluing of the ends is carried out by pressing between the pressure folding rollers 18 and the line 15 of adhesive applied at the third gluing position.

Therefore, in the second gluing process, the folded outer part of the paper tape 4, which is not coated with adhesive at section γ, is glued to the other half of the protective cardboard sheet 2, as shown in FIG. This allows the bag to open as shown.

FIG. 3 shows how the paper tape 4 is folded so as to overlap each other along the folding lines, that is, the longitudinal folding line 4ah and the transverse folding line 2a, in a bag made by the manufacturing method of the present invention. It shows how the layers are formed.

However, in the present invention, only one of the four layers is glued to one half of the cardboard sheet 2 by a line 5a of adhesive applied at the first glue location.

The other three layers of paper tape 4 are adhered to the other half of the cardboard sheet 2.

The adhesion of the three layers is made by three adhesive lines 5a, 8 and 15 applied by the three gluing sections 5, 7 and 14.

Even if a part of the paper tape is wasted in the bag manufactured by the manufacturing method of the present invention, the resulting increase in cost can be fully absorbed by the large increase in production capacity and production efficiency.

In addition, the position of the horizontal fold line 2a can be determined so that one side of the cardboard of the bag is longer than the other, in which case the longer protruding part is used as the folded part that closes the opening of the bag. It can be easily made by folding it back with transverse folds.

[Brief explanation of drawings]

Figure 1 is a side diagram of the manufacturing equipment used to manufacture the bag of the present invention, Figure 2 is a diagram of the equipment shown in Figure 1 viewed from above, and Figure 3 is a perspective view of the bag of the present invention. be. Main symbols in the drawing: 1: Roll for cardboard sheet, 2
: Cardboard sheet, 3: Paper tape roll, 4: Paper tape, 5: First glue part, 6, 10: Pressure roll,
1: Second glue part, 9: Folding mechanism, 11: Cutting roller 14: Third glue part, 18: Pressure folding roller 2a: Horizontal fold line, 4a: Longitudinal fold line , 5a: Glue line 0

Claims (1)

[Claims] Of the 14 layers of paper tape, three layers are folded along the longitudinal and transverse fold lines and glued to one half of the protective cardboard sheet, and the remaining one A protective cardboard sheet folded in half like a book cover, characterized in that the layer is affixed to the other half of the protective cardboard sheet, and along a fold line parallel to the edge of the cardboard sheet. A bag consisting of paper tape that has been folded in half at least once and sealed at the side edges of the bag, which is adhered with adhesive between the two halves of the cardboard sheet of the bag. 2. During the first step, the continuous paper tape extends partially over the edge of the cardboard sheet, at least approximately half of the paper tape extends beyond the line of adhesive applied at the first crease location. Glue the paper tape to both ends of the cardboard sheet so that it sticks out, during the second step, the length of the glued part and the length of the unglued part are substantially equal to the surface of the pasted paper tape. A second sheet is created by applying adhesive intermittently depending on the length of the side edges of the bag when completed, and by folding the paper tape in half along the longitudinal fold line. Gluing is done by gluing the paper tapes to each other over the length of the glued parts, which are applied in position, and the resulting web is cut to form a semi-finished product of the bag with glued parts and 9 non-glued parts. During the third step, a strip of glue is applied to the outside surface of the folded paper tape, and the cut half-finished bag is folded along the horizontal fold line like a book cover. The protective cardboard sheet is folded in half like a book cover, and the third gluing step is to adhere the surfaces of the paper tapes with adhesive applied to each other in position. A bag affixed by paper tape having one longitudinal fold line being glued between the two halves of the cardboard sheet at both ends of the cardboard sheet to seal the edges of the bag. How the body is manufactured. 3 Roll for cardboard sheets for supplying continuous cardboard sheets, 2 rolls at the ends of the cardboard sheets
Two paper tape rolls for supplying book paper tape, first gluing section for applying adhesive between cardboard sheet and paper tape, pressing paper tape and gluing paper tape to the edge of cardboard sheet Apply adhesive to the paper tape intermittently so that glued and unglued parts of approximately equal length are alternated using a pressure roller to tighten the bag. For the second gluing section, glue the paper tape 2 along the longitudinal fold line of the paper tape.
A folding mechanism equipped with a folding member, a pressure roller that applies paper tape to the folded position with adhesive applied at the second zigzag section, and a pressure roller that affixes paper tape to the formed web. a cutting mechanism operated in synchronization with the second gluing section, which cuts the bag body into a semi-finished product of a predetermined length such that the side end has a glued part and an unglued part continuously; a third gluing section for applying adhesive to the outer surface of the folded paper tape; a folding member director for folding the cut half-finished bag along nine transverse fold lines in the transport direction; At least one protective cardboard sheet is folded in half like a book cover and is characterized by a pressure folding roller for pressurizing and folding half-finished bags stacked along horizontal fold lines. A paper tape having a longitudinal fold line was drawn on both sides of the cardboard sheet and pasted between the two halves of the cardboard sheet to seal the edges of the bag. Bag manufacturing equipment.