CA1149794A - Method and apparatus for using a helically wound core - Google Patents
Method and apparatus for using a helically wound coreInfo
- Publication number
- CA1149794A CA1149794A CA000403597A CA403597A CA1149794A CA 1149794 A CA1149794 A CA 1149794A CA 000403597 A CA000403597 A CA 000403597A CA 403597 A CA403597 A CA 403597A CA 1149794 A CA1149794 A CA 1149794A
- Authority
- CA
- Canada
- Prior art keywords
- core
- web
- glue
- roll
- supporting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to the method and apparatus for using a core made of cardboard or other such material. The core is covered with hot melt glue so that the end of a web of material to be wound on it can be secured to it. The invention also relates to a method of manufacturing the core in a helical winding machine, a method of using the core for winding a web of material and an apparatus for using the core for winding webs of material. The web of material is secured to the core by heating the glue up to its melting point and pressing the web against the core.
The present invention relates to the method and apparatus for using a core made of cardboard or other such material. The core is covered with hot melt glue so that the end of a web of material to be wound on it can be secured to it. The invention also relates to a method of manufacturing the core in a helical winding machine, a method of using the core for winding a web of material and an apparatus for using the core for winding webs of material. The web of material is secured to the core by heating the glue up to its melting point and pressing the web against the core.
Description
~49'7~4 A METHOD AND APPARATUS FOR USING A HELICALLY WOUND CORE
The present invention relates to a method and apparatus for using a helically wound core, made of strips of cardboard, paper or other such material, to which the leading end of a web of material to be wound on the core is secured. The invention also relates to a method of manufacturing such a core, a method of using the core for winding webs of material and an apparatus for using the core for winding.
In the production and treatment of various webs of material, e.g. in the paper and textile industries, the webs are usually wound into rolls on cores which are mostly made of cardboard. Before the winding is initiated the leading end of the web must be secured to the core.
This is usually done by using adhesives, whereby either the core or the side of the web facing the core is coated with glue or an adhesive strip is introduced between the web and the core. The web can also be secured to the core by means of staples or other such means ~497~
introduced from the outside of the web as is disclosed in Canadian patent 1,045,992 (van Dongeren), issued January 9, 1979.
The conventional methods of securing the leading end of the web to the core involve disadvantages which can be eliminated by the present invention. One object of the invention is to provide a core to which the leading end of the web can easily and rapidly be secured when the web is transferred from a fully wound roll to a new core, whereby delays are avoided.
Another object is to provide a method of securing a web to a core which does not cause damage to the web or soiling of the rolling equipment or its surroundings. This is mainly achieved by means of coating the core at least partially with hot melt glue which becomes adhesive when heated. The glue on the core is preferably made to form one or more helical stripes.
The most preferable way of applying the glue on the core is to transfer it to the surface or the core by means of a sta-tionary means when manuEacturing the core by the helical winding method so that due to the rotational forward movement of the core a helical glue stripe is generated on its surface.
In using a core according to the invention for winding webs of material the glue layer is at least partially heated up to a temperature at which it melts, when the web is transferred from a fully wound roll to a new core, and the web is secured to the core by pressing it against the heated glue layer whereafter the pressing is terminated and the web of material is cut between the fresh core and the fully wound roll.
~he apparatus for using a core according to the invention for winding webs of material comprises two parallel supporting drums which support the roll when the web of material is wound on a core; means for bringing a new core onto the supporting drums;
means for removing a fully wound core from its position on the su~porting drums; means for causing the web or material to run along the periphery of the new core; and means for severing the .~ .
~497~4 web between the new core and the fully wound roll after the web has been secured to the core. The apparatus is character- ;
ized by means for heating glue on the core up to its melting point from the side of the web of material not facing the core and for pressing the web of material against the heated glue.
A preferred embodiment of the apparatus com?rises two parallel supporting drums which support the roll when the web of material is wound on a core and from between which the web is brought to the roll by using one of the supporting drums as a guiding means;
means for bringing a new core onto the supporting drums; means for pushing away a fully wound roll so that a gap is created between the fully wound roll and the supporting drum guiding the web, while the roll is being supported by the opposite supporting drum; and means for severing the web between the new core and the fully wound roll after the web has been secured to the core and is characterized by means for heating glue on the core up to its melting point from the side of the web of material not facing the core and for pressing the web of material against the heated glue; means for bringing the heating and pressing means to the core through the gap between the roll and the supporting drum and for returning the means to a position beside the sUpportin~ drum.
The invention is described in more detail in the following with reference to the annexed drawings of which Fig. 1 illustrates the manufacturing method of a core according to the invention;
Figs. 2 and 3 show two alternative embodiments of the core;
Fig. 4 is a schematic view of an apparatus for using the core for winding webs of materiali Figs. 5 and 6 show two alternative embodiments of the apparatus.
In Fig. 1 reference number 1 indicates a core made of a strip of cardboard 2 in a continously operating helical core winder according to a method known per se. The core is rotated and fed forward by means of an endless driving belt 3. A cutting device, not shown in the drawing, is used for cutting the completed core ... . . .
~4979~
into sections of desired length. A means for feeding glue 4, in which hot melt glue is melted by heating, compris~g a glue container 5 and a pump has been mounted beside the core between the cutting device and the driving belt. The molten glue is fed onto the core through a pipe 6 and a nozzle 7 and is then spread and smoothed by means of a spreading device 8. The nozzle is stationary but due to the rotational forward movement of the core a helical glue stripe 9 is generated on the sur-face of the core.
Alternatively, the glue can be supplied to the core by means of a rotating roll which when coming into contact with the sur-face of the core transfers glue to it. The glue used can be a hot melt glue (thermoplastic glue), containing waxes, poly-ethylene and ethyl vinyl acetate, which is applied in a molten state or a glue dispersed in water, eg. a polyvinyl acetate dispersion, which is applied cold.
The glue can be dyed ~-o that cores used for different purposes can be provided with glue stripes of different colour.
Fig. 2 shows an alternative embodiment in which a helical core 10 has been provided with spaced annular glue stripes 11 the ,width of which and the space between which are chosen so as to give the required adhesitivity.
Fig. 3 shows another embodiment in which longitudinal glue stripes have been applied on the core 12.
Further alternatives of applying glue onto the core are of course possible, eg. the glue can form a dot pattern.
Fig. 4 shows a winder in which the winding of a paper web 14 on a core according to the invention takes place on two sup-porting drums 15 and 16. The paper web is brought to the roll guided by one of the supporting drums 15. The drawing shows ; the phase in the winding process in which the winding of a roll is completed and the winding of a new roll on a new core 17 is 11~979~
to be started. The new core which is located in the gap between the supporting drums resting on them has been brought into position for instance from the side of the winder by means of well known equipment not shown in the drawing. The fully wound roll 18, the rotational movement of which has been ter-minated, has been pushed away from its winding position, where it rested on both supporting drums, by means of an ejector roll 19 to a position where it rests on a backing roll 20 and the supporting drum 16, located beside the supporting drum 15, which guides the web, whereby a gap is created between the sup-porting drum15 and the fully wound roll. A guide roll 21 which guides the paper web so that it runs along the periphery of the core 17 is introduced through the said gap. With the help of a heating and pressing device 22 which is introduced through the gap between the supporting drum 15 and the roll 18 the paper web is pressed against the core 17 and the glue on the core is heated through the paper web until it melts. When the device 22 is removed the glue congeals and the web is secured to the core.
Thereafter the web is cut between the new core and the fully wound roll by means of a severing device not shown in the draw-ing,as it may be of any well known types that cut the web with a knife or other severing means, after which the fully wound roll is ejected and the winding of a new roll can be initiated.
During winding the ejector roll 19, the guide roll 21 and the heating and pressing device 22 are maintained in their initial positions beside the supporting drum 15.
The heating device which heats the glue layer up to a temperature of about 80C , at which the glue melts, preferably comprises electric resistance heating elements which extend over the paper web. The temperature and the pressing time of the heating element can be adjusted to correspond to the prevailing conditions;
the melting point of the glue and the thickness of the paper glued are the decisive factors. Also other means can be used to heat the glue, eg. heat can be generated by microwaves or the glue can be heated either directly or indirectly by means of hot gases. In the embodiment according to Fig. 3 the same device is used to carry out the heating and pressing operations but lt is ~149~94 , , naturally possible to use separate means,which are independentl~
applied, to perform each function.
L
Fig. 5 shows a winder in which the fully wound roll 18 is pushed away to the opposite direction shown in Fig. 4 after having been wound on the supporting drums 15 and 16. In the same way as in Fig. 4, the web is caused to run along the periphery of the new core 17 by means of a guide roll 21 and the glue on the core is heated and the web 14 pressed against the core by means of a heating and pressing device 22.
Fig. 6 shows a winder in which a paper web 14 is conducted to the roll 18 over the supporting drums 15 and 16. In this embodiment, the new core 17 rests on the paper web. The heating and pressing device 22 is brought into the heating and pressin~
position through the gap between the supporting drums.
~r
The present invention relates to a method and apparatus for using a helically wound core, made of strips of cardboard, paper or other such material, to which the leading end of a web of material to be wound on the core is secured. The invention also relates to a method of manufacturing such a core, a method of using the core for winding webs of material and an apparatus for using the core for winding.
In the production and treatment of various webs of material, e.g. in the paper and textile industries, the webs are usually wound into rolls on cores which are mostly made of cardboard. Before the winding is initiated the leading end of the web must be secured to the core.
This is usually done by using adhesives, whereby either the core or the side of the web facing the core is coated with glue or an adhesive strip is introduced between the web and the core. The web can also be secured to the core by means of staples or other such means ~497~
introduced from the outside of the web as is disclosed in Canadian patent 1,045,992 (van Dongeren), issued January 9, 1979.
The conventional methods of securing the leading end of the web to the core involve disadvantages which can be eliminated by the present invention. One object of the invention is to provide a core to which the leading end of the web can easily and rapidly be secured when the web is transferred from a fully wound roll to a new core, whereby delays are avoided.
Another object is to provide a method of securing a web to a core which does not cause damage to the web or soiling of the rolling equipment or its surroundings. This is mainly achieved by means of coating the core at least partially with hot melt glue which becomes adhesive when heated. The glue on the core is preferably made to form one or more helical stripes.
The most preferable way of applying the glue on the core is to transfer it to the surface or the core by means of a sta-tionary means when manuEacturing the core by the helical winding method so that due to the rotational forward movement of the core a helical glue stripe is generated on its surface.
In using a core according to the invention for winding webs of material the glue layer is at least partially heated up to a temperature at which it melts, when the web is transferred from a fully wound roll to a new core, and the web is secured to the core by pressing it against the heated glue layer whereafter the pressing is terminated and the web of material is cut between the fresh core and the fully wound roll.
~he apparatus for using a core according to the invention for winding webs of material comprises two parallel supporting drums which support the roll when the web of material is wound on a core; means for bringing a new core onto the supporting drums;
means for removing a fully wound core from its position on the su~porting drums; means for causing the web or material to run along the periphery of the new core; and means for severing the .~ .
~497~4 web between the new core and the fully wound roll after the web has been secured to the core. The apparatus is character- ;
ized by means for heating glue on the core up to its melting point from the side of the web of material not facing the core and for pressing the web of material against the heated glue.
A preferred embodiment of the apparatus com?rises two parallel supporting drums which support the roll when the web of material is wound on a core and from between which the web is brought to the roll by using one of the supporting drums as a guiding means;
means for bringing a new core onto the supporting drums; means for pushing away a fully wound roll so that a gap is created between the fully wound roll and the supporting drum guiding the web, while the roll is being supported by the opposite supporting drum; and means for severing the web between the new core and the fully wound roll after the web has been secured to the core and is characterized by means for heating glue on the core up to its melting point from the side of the web of material not facing the core and for pressing the web of material against the heated glue; means for bringing the heating and pressing means to the core through the gap between the roll and the supporting drum and for returning the means to a position beside the sUpportin~ drum.
The invention is described in more detail in the following with reference to the annexed drawings of which Fig. 1 illustrates the manufacturing method of a core according to the invention;
Figs. 2 and 3 show two alternative embodiments of the core;
Fig. 4 is a schematic view of an apparatus for using the core for winding webs of materiali Figs. 5 and 6 show two alternative embodiments of the apparatus.
In Fig. 1 reference number 1 indicates a core made of a strip of cardboard 2 in a continously operating helical core winder according to a method known per se. The core is rotated and fed forward by means of an endless driving belt 3. A cutting device, not shown in the drawing, is used for cutting the completed core ... . . .
~4979~
into sections of desired length. A means for feeding glue 4, in which hot melt glue is melted by heating, compris~g a glue container 5 and a pump has been mounted beside the core between the cutting device and the driving belt. The molten glue is fed onto the core through a pipe 6 and a nozzle 7 and is then spread and smoothed by means of a spreading device 8. The nozzle is stationary but due to the rotational forward movement of the core a helical glue stripe 9 is generated on the sur-face of the core.
Alternatively, the glue can be supplied to the core by means of a rotating roll which when coming into contact with the sur-face of the core transfers glue to it. The glue used can be a hot melt glue (thermoplastic glue), containing waxes, poly-ethylene and ethyl vinyl acetate, which is applied in a molten state or a glue dispersed in water, eg. a polyvinyl acetate dispersion, which is applied cold.
The glue can be dyed ~-o that cores used for different purposes can be provided with glue stripes of different colour.
Fig. 2 shows an alternative embodiment in which a helical core 10 has been provided with spaced annular glue stripes 11 the ,width of which and the space between which are chosen so as to give the required adhesitivity.
Fig. 3 shows another embodiment in which longitudinal glue stripes have been applied on the core 12.
Further alternatives of applying glue onto the core are of course possible, eg. the glue can form a dot pattern.
Fig. 4 shows a winder in which the winding of a paper web 14 on a core according to the invention takes place on two sup-porting drums 15 and 16. The paper web is brought to the roll guided by one of the supporting drums 15. The drawing shows ; the phase in the winding process in which the winding of a roll is completed and the winding of a new roll on a new core 17 is 11~979~
to be started. The new core which is located in the gap between the supporting drums resting on them has been brought into position for instance from the side of the winder by means of well known equipment not shown in the drawing. The fully wound roll 18, the rotational movement of which has been ter-minated, has been pushed away from its winding position, where it rested on both supporting drums, by means of an ejector roll 19 to a position where it rests on a backing roll 20 and the supporting drum 16, located beside the supporting drum 15, which guides the web, whereby a gap is created between the sup-porting drum15 and the fully wound roll. A guide roll 21 which guides the paper web so that it runs along the periphery of the core 17 is introduced through the said gap. With the help of a heating and pressing device 22 which is introduced through the gap between the supporting drum 15 and the roll 18 the paper web is pressed against the core 17 and the glue on the core is heated through the paper web until it melts. When the device 22 is removed the glue congeals and the web is secured to the core.
Thereafter the web is cut between the new core and the fully wound roll by means of a severing device not shown in the draw-ing,as it may be of any well known types that cut the web with a knife or other severing means, after which the fully wound roll is ejected and the winding of a new roll can be initiated.
During winding the ejector roll 19, the guide roll 21 and the heating and pressing device 22 are maintained in their initial positions beside the supporting drum 15.
The heating device which heats the glue layer up to a temperature of about 80C , at which the glue melts, preferably comprises electric resistance heating elements which extend over the paper web. The temperature and the pressing time of the heating element can be adjusted to correspond to the prevailing conditions;
the melting point of the glue and the thickness of the paper glued are the decisive factors. Also other means can be used to heat the glue, eg. heat can be generated by microwaves or the glue can be heated either directly or indirectly by means of hot gases. In the embodiment according to Fig. 3 the same device is used to carry out the heating and pressing operations but lt is ~149~94 , , naturally possible to use separate means,which are independentl~
applied, to perform each function.
L
Fig. 5 shows a winder in which the fully wound roll 18 is pushed away to the opposite direction shown in Fig. 4 after having been wound on the supporting drums 15 and 16. In the same way as in Fig. 4, the web is caused to run along the periphery of the new core 17 by means of a guide roll 21 and the glue on the core is heated and the web 14 pressed against the core by means of a heating and pressing device 22.
Fig. 6 shows a winder in which a paper web 14 is conducted to the roll 18 over the supporting drums 15 and 16. In this embodiment, the new core 17 rests on the paper web. The heating and pressing device 22 is brought into the heating and pressin~
position through the gap between the supporting drums.
~r
Claims (4)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. A method of using a helically wound core made of strips of cardboard or other such material to which core the end of a web of material is secured, and wherein the surface of the core is at least partially covered with a hot melt glue, characterized in that when the web is to be transferred to a new core from a fully wound roll, the glue on the core is at least partially heated up to a temperature at which it melts and the web of material is secured to the core by pressing it against the heated glue whereafter the pressure is removed and the web of material is severed between the new core and the fully wound roll.
2. A method according to claim 1, characterized in that the heating of the glue and the pressing of the web of material against the glue are carried out simultaneously.
3. An apparatus for winding webs of material, adapted for using a helically wound core made of strips of cardboard or other such material to which core the end of a web of material is secured and wherein the surface of the core is at least partially covered with a hot melt glue, said apparatus comprising two parallel supporting drums for supporting a roll formed by winding a web of material on a respective core; means for bringing a new core onto the supporting drums; means for removing a fully wound roll from its position on the supporting drums; means for causing the web of material to run along the periphery of the new core; and means for severing the web between the new core and the fully wound roll after the web has been secured to the core, characterized by means for heating glue on the core up to its melting point from the side of the web of material not facing the core and for pressing the web of material against the heated glue.
4. An apparatus according to claim 3, wherein the web is brought to the roll by using one of the supporting drums as guiding means; said means for removing a fully wound roll from its position on the supporting drums including means for pushing away a fully wound roll so that a gap is created between the fully wound roll and the supporting drum guiding the web, while the roll is being supported by the opposite supporting drum, said apparatus further comprising means for bringing the heating and pressing means to the core through the gap between the roll and the supporting drum and for returning the heating and pressing means to a position beside the supporting drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000403597A CA1149794A (en) | 1978-06-21 | 1982-05-21 | Method and apparatus for using a helically wound core |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI781977A FI59218C (en) | 1978-06-21 | 1978-06-21 | SAETT ATT ANVAENDA EN SPIRALHYLSA |
| FI781977 | 1978-06-21 | ||
| FI782865A FI69009C (en) | 1978-09-20 | 1978-09-20 | SAETT ATT ANVAENDA EN SPIRALLINDAD HYLSA |
| FI782865 | 1978-09-20 | ||
| CA321,875A CA1128485A (en) | 1978-06-21 | 1979-02-20 | Helically wound core and method of producing same |
| CA000403597A CA1149794A (en) | 1978-06-21 | 1982-05-21 | Method and apparatus for using a helically wound core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1149794A true CA1149794A (en) | 1983-07-12 |
Family
ID=27426128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000403597A Expired CA1149794A (en) | 1978-06-21 | 1982-05-21 | Method and apparatus for using a helically wound core |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1149794A (en) |
-
1982
- 1982-05-21 CA CA000403597A patent/CA1149794A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4338147A (en) | Method and apparatus for winding a web upon a core having a stripe of hot-melt adhesive | |
| US4608807A (en) | Process for wrapping a rotating bale of a backed mineral fiber strip with a protective strip that is applied during winding of the bale, for packaging | |
| US5265399A (en) | Method and apparatus for wrapping rolls, paper rolls in particular, in a wrapper sheet | |
| CA2335828C (en) | Paint roller with integrated core and cover and method and apparatus for production of same | |
| USRE35526E (en) | Method and apparatus for manufacturing paint roller and product produced thereby | |
| JPH0573663B2 (en) | ||
| US5795432A (en) | Coiling machine with adhesive strip applicator | |
| US5273604A (en) | Method and apparatus for manufacturing paint roller and product produced thereby | |
| US5379962A (en) | Heated web knife | |
| US6145196A (en) | Method of making a paint roller with non-plastic base material | |
| EP0177867B1 (en) | System for processing fabrics or webs continuously | |
| CA1149794A (en) | Method and apparatus for using a helically wound core | |
| JP3261477B2 (en) | Vacuum assisted web drying system | |
| US5428941A (en) | Apparatus for winding a printed product and a protective wrapping into a roll | |
| EP0150685A2 (en) | Method and machine for insulating electric conductors for transformers by glueing insulation coating sheet and conductors thus insulated | |
| US5671618A (en) | Plate press for embossing or glazing, particularly for hides and the like | |
| EP0402325A3 (en) | Apparatus for the formation of rolls of web material on a winding core | |
| US6224708B1 (en) | Process for producing a printing form | |
| JPS6115816B2 (en) | ||
| GB2039250A (en) | Apparatus for producing bags of plastics material | |
| FI69617B (en) | AEMNESBANERULLE OMGIVEN AV ETT HOELJE SOM SKYDDAR OCH STOEDER RULLEN SAETT ATT BILDA DET | |
| FI59218B (en) | SPIRALHYLSA | |
| JPS6143795Y2 (en) | ||
| SU1247489A1 (en) | Device for applying web material and pasting it to backing | |
| CA2315283C (en) | Method of making a paint roller with non-plastic base material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |