FI69617B - AEMNESBANERULLE OMGIVEN AV ETT HOELJE SOM SKYDDAR OCH STOEDER RULLEN SAETT ATT BILDA DET - Google Patents

Description

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The present invention relates to a roll of material surrounded by a roll of protective and supporting wrap and to a method of forming such a wrap around a web of material. The invention relates in particular to the protection of a web of material coming from unrolling stands, length or sheet cutters with a wrap surrounding a roll of material.

It is already known to roll a paper web from a slitter and sheet cutter onto a core sleeve by manually attaching the beginning of the web to the core using various aids such as adhesive tape, stapling pins and the like. The end of the paper web is also attached to the roll manually using adhesive tape or by brushing a narrow strip of adhesive across the end of the web with a brush. However, such gluing opens easily when the heavy roll is moved. For this reason, and to support the roll, the rolls are generally provided with a separate wrapper made of a material that is more supportive of the material web. However, surrounding the roll with such a separate wrapper is cumbersome and expensive.

The object of the present invention is to eliminate this drawback and to provide the material roll mentioned in the introduction, in which no separate wrapper is required to protect and support the roll. It is a further object of the invention to provide a way of attaching the end of a truncated web of material to a roll by gluing, by means of which it is possible to provide a very strong layer which protects and supports the roll.

The main features of the invention appear from the appended claim 1.

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According to the invention, the end of the truncated web of material is attached to the roll by starting the application of the adhesive so well before the web of material is cut that a roll-forming and supporting wrapper is formed around the roll.

Efficient gluing of the end of the paper web to the roll reduces scrap during roll transport and further processing. This means better occupational safety when the floors stay clean.

The gluing means used in the method according to the invention can also glue the ends of the broken web together, several paper webs can be joined to each other at the ends and several paper layers can be glued into multilayer paper using inferior paper in the intermediate layers. In addition, the adhesive application means may be combined with wetting means for controlling the moisture of the paper web in a transverse profile, means for applying various additives to the paper web surface and means for marking the paper web, e.g.

All of these are additional benefits that are also of great economic importance.

However, a primary advantage of the present invention is that no separate wrapper is required to protect and support the roll, but the wrapper can be formed from the web of material to be rolled already in the rolling step.

The invention will be described in more detail below with reference to the accompanying drawing, which shows a side-by-side device useful for carrying out the method according to the invention, mounted after the slitter.

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In the drawing, the unwinding stand, i.e. the tampon, is marked with the reference number 1. The paper path from the unrolling stand is marked with the reference number 2 and passes under the guide roll 3 to the slitter 4. The slitter 4 comprises a plurality of adjacent by means of control surfaces 7. The blades 5 and 6 cut in the longitudinal direction of the paper web 2 into several separate webs which are wound on rollers 11 supported by carrier rollers 9, which have a core sleeve 10 inside.

Seen in the direction of travel of the paper web, a spraying device 8 extending across each longitudinal path is arranged in front of the carrier rollers 9, by means of which the glue can be sprayed on the side of the paper web which is directed inwards towards the sleeve 10.

The roller 11 is rotated by means of carrier rollers 9, but it is clear that the roller 11 can also be rotated directly by rotating members supporting the core-sleeve 10, in which case the carrier rollers 9 are not required.

At the beginning of the rolling, the core sleeve blank is fitted on the carrier rollers 9 and the beginning of the cut paper web is passed around the first carrier roll 9 and fixed to the core blank by means of an adhesive. The adhesive is then applied to such an extent that it extends up to the adhesive spray device 8. Thereafter, the carrier rollers 9 are started to be rotated and at the same time glue is sprayed from the spraying device 8, whereby the paper web rotates and glues around the core blank. Rolling and gluing are therefore continued until the thickness of the core blank has increased to a sufficient size, i.e. the thickness of the desired core blank. The rolling is then continued without spraying the adhesive from the spraying device 8. The spraying device 8 can also 4 6961 7 spray another liquid substance on the track, such as, for example, dye or water to wet the track. At least one turn before the roller 11 has reached its desired thickness, the application of the adhesive is started again by spraying the adhesive from the spraying device 8 onto the track. In this case, the end of the paper web is glued to the roll 11, forming a wrapper around it which protects and supports the roll, which consists of at least two layers of material glued together. The track cutting can be performed either manually or mechanically.

It is clear that instead of the spraying device 8 shown in the drawing, other types of adhesive application means can be used, such as a roller, an adhesive brush, a stencil or other generally known adhesive application device arranged against the surface of the track. One preferred solution is a simple roll partially embedded in an adhesive tray.

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