Patent Application
20160167917
The present invention relates to an easily removable paper tube used for winding material, such as fabric, a band, a film and so forth, and a method for successively using articles, each of which uses the paper tube, and, more specifically, to an easily removable paper tube and a method for successively using articles that use the paper tube, in which the paper tube is effectively removed, without deforming a roll of material wound around the paper tube, such use of the material enabled by releasing it from the inside of the roll with the paper tube removed, thereby increasing the unrolling speed of the material, and a first article and a second article, each of which includes wound material, are connected to each other for use, thereby allowing successive provision of the articles and thus remarkably increasing a rate of successive production.
In general, a paper tube is formed in a cylindrical shape by cutting a sheet of source paper in a predefined length, and gluing and continuously rolling up the cut source paper in a spiral fashion in several layers.
Material, such as thread, cord, fabric, film, and the like, which is wound around the paper tube is generally unwound from the outer layers of a roll by rotating the paper tube, but in this case, it is difficult to unroll the material at high speed, and after one article of wound material is completely used, another article needs to be connected to the used article, that is, the articles should be separately used one by one, thereby a rate of successive production is degraded.
The present invention is devised to solve the aforementioned problems, and one purpose of the present invention is to provide an easily removable paper tube and a method for successively using articles with the paper tube, in which successive perforations are helically formed along a lengthwise direction of the paper tube, that is, the length direction of a winding surface around which material is wound, so that the paper tube can be effectively removed while maintaining the winding state of the material, without deforming a roll of material, thereby enabling the material to be released from the inside after the removal of paper tube, and thus improving the unrolling speed of the material, and in which a first article of wound material and a second article of wound material are used by connecting them to each other, thereby making it possible to successively provide the articles, and thus to remarkably improve a rate of successive production.
The above and another purposes and advantages of the present invention will be more apparent from the following description of exemplary embodiments.
The above purpose is achieved by an easily removable paper tube according to a first aspect, which is characterized by including a perforated portion that has perforations helically formed on a winding surface of the paper tube with a cylindrical shape.
Here, a length ratio of a perforation of the perforated portion to a non-perforated part (i.e., a length between two perforations) may be 0.5:1 to 10:1.
Preferably, an angle of the perforated portion relative to a horizontal plane may be 20 degrees to 40 degrees.
Preferably, a distance between two perforated portions may be 30 mm to 200 mm.
According to a second aspect, an easily removable paper tube may further include at least one additional sheet of source paper wrapped around a winding surface thereof, except the perforated portion.
According to a third aspect, the easily removable paper tube may further include at least one sheet of film or paper that wraps around an outermost circumferential surface of the paper tube of the second aspect.
Preferably, a central line surface roughness of the film or paper may be 0.03 μm to 10 μm.
Preferably, the length of the film or paper may be shorter than a length of the paper tube, but longer than a length of the wound material.
Preferably, the film or paper may be thermally contracted.
According to a fourth aspect, the easily removable paper tube may further include at least one sheet of film or paper that surrounds an outermost circumferential surface of the paper tube of the first aspect.
The above purpose can be achieved by a method of successively using articles using a paper tube, the method comprising four steps: removing the easily removable paper tube of the fourth aspect from each of at least two articles, each of which comprises the material wound around the paper tube; removing the film or paper from the each of at least two articles; forming an outer tail after removing an outer knot of the wound material from the each of at least two articles; and forming a connection portion between the at least two articles by tying the outer tail of one of the at least two articles to an inner tail of the other article.
Preferably, the method may be applicable to at least two articles, each of which includes material wound around the easily removable paper tube of the third aspect.
In addition, the above object is achieved by an article using the aforementioned easily removable paper tube, the article including the paper tube and material wound around the paper tube.
The wound material may be one of fiber, non-woven fabric, film, or fabric.
Additional features of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention.
According to the present invention, a paper tube can be easily removed, thereby increasing the work efficiency or production efficiency, and after removing the paper tube, wound material can be used from the inside, so that it is possible to connect a first article and a second article by connecting an external end or the internal end of the first article to an internal end or an external end of the second article, which allows the successive production of the articles, thereby significantly contributing to productivity improvement.
An easily removable paper tube includes a perforated portion that is formed by helically perforating a winding surface of the paper tube with a cylindrical shape.
The invention is described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure is thorough, and will fully convey the scope of the invention to those skilled in the art.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the specification, including definitions, will control.
Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the invention, suitable methods and materials are described herein.
Unless stated otherwise, all percentages, parts, ratios, etc., are by weight. When an amount, concentration, or other value or parameter is given as either a range, preferred range or a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. Where a range of numerical values is recited herein, unless otherwise stated, the range is intended to include the endpoints thereof, and all integers and fractions within the range. It is not intended that the scope of the invention be limited to the specific values recited when defining a range.
When the term “about” is used in describing a value or an end-point of a range, the disclosure should be understood to include the specific value or end-point referred to.
As used herein, the terms “comprises,” “comprising,” “includes,” “including,” “containing,” “characterized by,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, “or” refers to an inclusive or and not to an exclusive or.
Where applicants have defined an invention or a portion thereof with an open-ended term such as “comprising,” it should be readily understood that unless otherwise stated the description should be interpreted to also describe such an invention using the terms “consisting essentially of and “consisting of.
Referring to
According to an exemplary embodiment, perforation process is performed on source paper 3 before being rolled up to form the paper tube (refer to
The perforated portion 5 may be formed by punching holes in the middle of the source paper 3 using a device with saw teeth, as shown in
In perforation process, the source paper after perforations are formed thereon is wound up at a predetermined angle θ (refer to
In addition, in perforation process, a length between perforated lines of the paper tube is determined by the width (a distance between perforated portions appearing on the paper tube) of source paper 11 to be perforated. The width of the source paper (a distance between the perforated portions) is preferably 30 mm or greater, and up to 200 mm. If the source paper width is greater than 200 mm, the area of the perforated portion to be removed is reduced and thus the strength required for removal is lowered, but the stable removal of the perforated portion may not be ensured and the paper tube may be torn during the removal. If the width of the source paper is less than 30 mm, the entire area of the perforated portion increases, resulting in increase of time needed to remove a paper tube and degradation of work efficiency.
In the paper tube 1 with the perforated portion, in a case where the paper tube is formed only with the source paper with the perforated portion, a thinner sheet of source paper may cause lowering of the compression strength, leading to deterioration of the handling of the paper tube, and thus the paper tube may be easily damaged during operation. Whereas, a thicker sheet of source paper may require more power to remove the paper tube and cause the paper tube to be torn during the removal. Therefore, a single sheet of source paper of an appropriate thickness on which perforation process was performed to have one or more sheets of secondary source paper wrapped around a remaining area other than the perforated portion, so that high efficiency in removing the paper tube can be maintained and the thickness of the remaining area can be enhanced, thereby reinforcing the paper tube such that better handling of the paper tube and excellent resistance to a winding surface pressure can be provided. Thus, as shown in
In the above paper tube, in a case where material is wound around and in direct contact with the paper tube, it may be highly likely for an internal part of the material to be damaged by the torn part or damaged part of the paper tube in the process of removing the paper tube by splitting and pulling the paper tube. Therefore, to overcome such problems, it may be preferable to wrap film or paper around an outermost circumferential surface of the paper tube formed by the above method to prevent the internal part of the wound material from being damaged and deformed when primarily removing the source, and then remove the additional film or paper. Thus, as shown in
The easily removable paper tube according to a fourth aspect of the present invention is characterized by having at least one sheet of film or paper 4 that wraps around the outermost circumferential surface of the paper tube 1 of the first aspect of the invention. That is, the paper tube 1 includes at least one sheet of film or paper 4 that surrounds the outermost circumferential surface of the winding surface of the paper tube 1 that does not include at least one sheet of source paper 3 wound around the entire surface of the source paper, other than the perforated portion 5.
In this case, the film or paper 4 processed to wrap the outermost circumferential surface may have a central line surface roughness Ra of preferably 0.03 μm to 10 μm. The surface roughness Ra of less than 0.03 μm may cause the surface to be so smooth that it may become difficult to wind the material around the paper tube, and whereas the surface roughness Ra of greater than 10 μm may cause the wound material to be damaged by the surface of the film or paper.
In addition, in wrapping the outermost circumferential surface of the paper tube with the film or paper 4, the length of the film or paper may be set to be shorter than the entire length of the paper tube, but longer than the length (a distance between both ends) of the material to be wound, so that improved work efficiency can be provided when the paper tube is initially torn.
Moreover, it may be preferable to primarily wrap the surface of the paper tube with the film or paper 4, and then secondarily heat the surface to thermally contract. The film or paper 4 is in contact with the paper tube by the contraction force of the film or paper 4, and thus the film or paper 4 can be prevented from being torn, which may be caused by adhesion to the surface of the paper tube.
Further, a method for successively using articles, each of which utilizes the paper tube according to an exemplary embodiment, may include four steps: removing the paper tube 1 of the third aspect of the present invention from each of at least two articles, each of which includes the material 2 wound around the paper tube 1; removing the film or paper 4 from the each of at least two articles, forming an outer tail 10 after removing an outer knot of the material 2 of the each of at least two articles; and forming a connection portion 16 by connecting the outer tail 10 of one article with an inner tail 9 of another article.
A method of successively using articles, each of which uses a paper tube will be described in detail with reference to
First, in a first step, the paper tube 1 is removed from each of at least two articles, each of which includes the material 2 wound around the paper tube of the third aspect, wherein the paper tube can be easily removed along the perforated portion according to the technical features of the present invention, so that the material 2 can be easily unrolled from the inside, with the paper tube removed (refer to
In a second step, the film or paper 4 is further removed from the article, wherein the film or paper 4 on an outer surface of the paper tube has prevented the inside of a roll of wound material from being damaged or deformed when the paper tube was primarily removed.
In a third step, an outer tail 10 of the article, that is, a tail for connection with wound material of another article, is formed after removing the outer knot of the roll of wound material from which the film or paper 4 has been removed in the second step.
In a fourth step, the connection portion 16 is formed by connecting the outer tail 10 of the article that is formed in the third step with an inner tail 9 of another article, wherein two or more articles can be connected to each other in the same manner, in which an outer side or an inner side of a first article can be connected to an inner side or an outer side of a second article, so that it is feasible to successively provide two or more articles, thereby significantly contributing to the productivity improvement.
It may be appreciated by one of ordinary skill in the art that the purpose of the present invention can be achieved even when the paper tube of the fourth aspect is employed in the method for successively using the articles utilizing the paper tube.
An article utilizing an easily removable paper tube according to the present invention is characterized by including the easily removable paper tube and material wound around the paper tube. It is obvious that any types of articles for sale that has material wound around such a paper tube will be within the scope of the present invention.
The material may be one of, but not limited to, for example, fiber, non-woven fabric, film, or fabric.
Hereinafter, the configuration and effects of the present invention will be described in detail with reference to examples and comparative examples thereof. However, the examples are provided only for the purpose of detailed description, and thus the scope of the invention is not limited thereto.
After perforation process on a sheet of source paper of 75 mm in width using saw teeth as shown in
The paper tube was manufactured in the same manner as in Example 3 except that a sheet of source paper of 50 mm, 75 mm, and 100 mm in width was used in the respective examples 6 to 8, while a length ratio of a perforation to a non-perforated part between two perforations was fixed to 2:1 in the perforation process.
The paper tube was manufactured in the same manner as in Example 3 except that the entire area of the paper tube, other than the perforated portion, was wrapped with secondary source paper as shown in
The paper tube was manufactured with the same method as used in Example 9, and then was processed by having a film wrapped around an outer circumferential surface as shown in
In this case, as shown in
The paper tube was manufactured with the same method as used in example 10. However, in Comparative Example 1, the length of the PET film was the same as the length of the material wound around the paper tube, as shown in
Evaluations as below were carried out on the paper tube of Examples 1 to 10 and Comparative Examples 1 to 3 and the results are shown in tables further below.
[Evaluation Method]
1. Split Strength Evaluation (Peel TEST)
The split strength of the paper tube with a perforated portion formed thereon was measured using a peel tester as shown in
2. Compressive Strength Evaluation (Compressed in a Direction Vertical to the Length of the Paper Tube)
As shown in
3. Degree of Split and Damage Evaluation
A degree of split and damage were observed with the naked eye. The comparative evaluation results of the paper tube of Examples 1 to 5 are shown in Table 1 and
As indicated by Table 1 and
The split strength and compressive strength evaluation results of the paper tubes with different source paper widths of Examples 6 to 8 are shown in Table 2 and
As seen in Table 2 and
Split strength and compressive strength evaluation results of the paper tube of Example 3 that was manufactured by perforating the primary source paper and the paper tube of Example 9 that was enhanced by the secondary source paper are shown in Table 3.
When the remaining area of the paper tube, other than the perforations, was enhanced by the secondary source paper, the compressive strength of the paper tube was increased while the split strength was maintained substantially the same, as seen in Table 3. In this manner, work efficiency may be enhanced while lowering the split strength, and damage to the paper tube, which may occur during handling, may be significantly reduced while increasing the compressive strength. However, if the source paper used in enhancement is too thick or the enhancement is carried out using several sheets of source papers, it may result in a deterioration of work efficiency or handling due to a difference in thickness between a perforated portion and a non-perforated area. For example, the perforated portion may be easily split from the paper tube. Thus, the enhancement needs to be carried out with proper control of the source paper.
Table 4 shows evaluation results of the work efficiency (in removing the paper tube) and occurrence of internal damage to an article according to whether a performed surface of the paper tube of each of Examples 10 and Comparative Examples 1 to 3 has been processed with film and according to a length of the film.
As seen in Table 4, the work efficiency is not affected when the paper tube with film surrounded around its surface (outermost circumferential surface) is split, while the damage to the internal part of the material due to the torn part or damaged part of the paper tube can be noticeably prevented. In this case, the length of the film or paper surrounding the outermost circumferential surface of the paper tube is shorter than the entire length of the paper tube, but longer than the wound material (article), as provided in Example 10, so that the work efficiency at the time of tearing the perforated portion on a top part of the paper tube for the initial splitting is not affected, while the internal part of the article can be effectively protected due to the longer length of the film than that of the material.
As apparent from the above description, it is feasible to optimize the easily removable paper tube by adding necessary functions thereto through various embodiments. In addition, while the above exemplary embodiments are provided only as representative exemplary embodiments, it is obviously understood that the present invention is not limited thereto.
It will be apparent to those skilled in the art that various modifications and variation can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2013-0134418 | Nov 2013 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2014/009945 | 10/22/2014 | WO | 00 |
