JPS6363453B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for tail sealing paper rolls, and in particular to improving a method for tail sealing toilet paper rolls. Another object of the present invention is to provide a tail sealing method that does not involve cutting paper in the direction of the web.

The tail seal of the toilet paper roll is
Generally, the entire surface of the tail seal is glued. However, in the conventional method described above, the glue in the tail seal part penetrates into the inside of the paper roll, and the tail part sticks tightly to the paper roll, making it difficult to separate. There are disadvantages such as the paper tearing in the direction of the paper roll from the .

In addition, there have been many complaints that when the roll paper is fed into the log saw and cut into a predetermined width one after another, the tail near the log saw is bent or rolled up, reducing the product value, and improvements in these areas are requested. ing.

As a result of research to improve the above-mentioned conventional drawbacks, the present inventors have found that by adopting the configuration described in the claims, the tail portion can be easily found and peeled off, and the tail portion can be easily bent or turned over. A method for tail-sealing a paper web without such problems can be obtained.

That is, the present invention is characterized in that the tail portion of the paper roll is dotted with glue slightly inward from the edge of the tail, and then the paper is cut by blowing air on both sides of the cutting section of the log saw. This is a method for tail sealing a web.

The present invention has the configuration as described above, and
Next, to explain the function and effect in detail, conventionally, the tail edge of the roll paper (hereinafter referred to as a log) was glued over the entire width, but the present invention has dotted glue on the edge of the tail edge. shall be. Moreover, this point bonding portion is bonded slightly inside the edge of the tail portion.

In order to apply the glue as described above, if an impact member such as a wire or a thin plate is attached to the tip of the injection port of a conventional glue injection nozzle tip, the jet stream of glue is separated on both sides of the impact member. Can be sprayed. In particular, in the method described above, the jet stream of glue that is divided into two can be adjusted to the width of the log to be cut because the interval between the parts sprayed onto the log can be selected by appropriately selecting the length L of the impact member. If the above-mentioned interval is also selected, the jet stream divided into two parts can be separated at a predetermined interval and the glue can be applied. The glue spotting position is selected using a timer or a tail detection phototube so as to be slightly inside the edge of the tail portion of the log (approximately 5 mm from the edge).

After applying glue to the tail portion of the log as described above, the log is sequentially cut to a predetermined width using a log saw. In this case, when the log is sent to the log saw using the feed belt, there is a risk that the tail portion may be bent or turned over. In particular, when the tail portion is glued with dots as in the present invention, when the log is cut with the log saw, the tail portion may be bent or turned over. There is a high risk that the unbonded portion of the log will bend or turn over when the log is fed into the log saw.

The present invention always blows air on both sides of the log saw in the winding direction of the log so that the edges cut with the log saw and the edges of the tail section to be subsequently cut do not bend or turn over. Because it is attached, it is possible to prevent the glue on the tail portion from bending when spotting and gluing.

As described above, in the present invention, the tail part of the log is glued with dots of glue, so the tail part can be easily distinguished.Moreover, since the tail part of the log is glued with dots of glue, it is extremely easy to peel off the tail part. Therefore, there are no problems such as paper tearing in the winding direction.

In addition, since the present invention uses dotted adhesive instead of adhesive on the entire surface, it is possible to reduce the unit consumption of adhesive, and
Since there is no bending or turning of the tail portion, there is an effect that the commercial value can also be increased.

Furthermore, the present invention can be easily applied to conventional tail seal devices because it requires only slight improvements to the nozzle tip and simple air blowing piping to the log saw section. This has the effect of being able to provide paper rolls with high commercial value at low prices.

FIGS. 1 to 3 and 5 show one embodiment of the present invention, and the present invention will now be explained with reference to these drawings. As shown in FIG. 1, the tail portion 2 of the log 1 is dotted with glue by spraying glue from a plurality of nozzle tips 3. In this case, the nozzle tip 3 used is one in which a wire 5 bent in a U shape is attached to the tip of the injection port 4 of the nozzle tip 3 in parallel to the injection direction, as shown in FIGS. 2 and 3. The jet stream of glue sprayed from the injection port 4 is separated and sprayed onto both sides of the wire 5.

On the other hand, since the width of logs to be cut is fixed (as an example, the width is 114 mm), the nozzle tip 3 is cut approximately in the middle of the tail portion 2 of the logs to be cut. The length L of the wire 5 to be attached is 8 mm, and the position is selected using a timer or a tail detection phototube so that the spray is sprayed approximately 5 mm inward from the edge 6 of the tail portion 2.

The logs, which have been dotted with glue as described above, are sent in the direction of the log saw by means of a log feeding belt, and are cut to a predetermined width to produce products.

In this case, in the conventional method, the log 1 is simply sent to the log saw 8 by the feed belt 7 and cut as shown in FIG. 4, so the tail portion 2 of the product M is partially bent. The product is then sent to the packaging process.

Therefore, as shown in FIG. 5, the present invention provides piping 9 on both sides of the log saw 8 with air nozzles attached for blowing the tail portion 2 of the log 1 in the winding direction. The tail portion 2 of the product M to be cut into two and the tail portion 2 of the log 1 to be sequentially cut by the log saw 8 are sprayed in the winding direction of the log 1 to continuously cut them while preventing bending or turning over. Then, the cut product M is held by a clamp 10 and sent to the packaging process.

Therefore, the present invention provides a product that allows the tail portion of a log to be dotted with glue using almost the same operation as a conventional tail sealing device, and the tail portion does not bend or turn over at that time. At the same time, it is possible to supply products with high commercial value at low prices.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an embodiment of the glue spotting method of the present invention, Fig. 2 is a front view of the nozzle tip used in the present invention, Fig. 3 is a side view of the same, and Fig. 4 is a case without air piping. FIG. 5 is an explanatory diagram of the cutting state of a log saw according to an embodiment of the present invention. 1: log, 2: tail part, 3: nozzle tip, 4: injection port, 5: wire, 6: edge of tail part, 7: log feeding belt, 8: log saw,
9: Air piping.

Claims (1)

[Claims] 1. A tail seal for a web paper, which is characterized in that the tail portion of the web paper is dotted with glue slightly inward from the tail edge, and then cut by blowing air on both sides of the cut section of a log saw. Method.