CA1168194A - Skin-pack wound coils - Google Patents
Skin-pack wound coilsInfo
- Publication number
- CA1168194A CA1168194A CA000389125A CA389125A CA1168194A CA 1168194 A CA1168194 A CA 1168194A CA 000389125 A CA000389125 A CA 000389125A CA 389125 A CA389125 A CA 389125A CA 1168194 A CA1168194 A CA 1168194A
- Authority
- CA
- Canada
- Prior art keywords
- wound
- coil
- coils
- radial opening
- wound coil
- 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
Landscapes
- Basic Packing Technique (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A wound coil in which the material is unwound from the inside through a radial opening in the side of the winding is packaged by shrinking a thin covering over the outside of the wound coil such that the covering is forced into the interstices of the outer coil windings, thereby supporting the winding during transportation and during the latter stages of unwinding.
A wound coil in which the material is unwound from the inside through a radial opening in the side of the winding is packaged by shrinking a thin covering over the outside of the wound coil such that the covering is forced into the interstices of the outer coil windings, thereby supporting the winding during transportation and during the latter stages of unwinding.
Description
4/dr ~ ~ ~9321-4 .. . .
~681~
BACKGROUND OF THE INVE~TION
This invention relates to the packaging of wound coils, and more particularly ko the adaptation of skin-packaging to wound coils in which the material is unwound from the inside out through a radial opening in the side of the winding.
~ , .
Heretofore, windings which have been wound in a igure-8 configuration with at least one radial hole in the side of the windlng through which the inner end of the winding can be withdrawn have been packaged in corrugated boxes, with or without the use of supporting cones to aid in supportlng the wound coil during transportation and to prevent bird-nestlng as the coil is unwound. Such corrugated cardboard stock containers or boxes may also include apertures for inserting payout tubes through the radial opening in the side ol the winding to facilitate withdrawal or unwinding - of th-. wound coil. Normally, such packaging of wound coils is done by hand and is time consuming.
Si~MMARY OF THE INVENTION
In accordance wlth this invention, the wound coil is skin-packaged by placing a pre-coated, pre-perforated corrugated base'and a cover disc, having a diameter slightly larger than the inner diameter of the wound coil, on a packaging station. A payout tube is inserted in the radial 2i opening and threaded with the inner end of the wound coil and the wound coil is then placed on the perforated base.
$~
The cover disc is placed on top of the coil and a thin film placed over the coil and the base. ~n accordance with well-known techniques of skin packaging, a vacuum draws the film in tight conformity to the wound coil simultaneously with the applicatio~ of heat to encapsulate the coil and the base in the transparent plastic skin. The film is also heat se21ed to the surface of the base. During the skin packaging, the transparent film is caused to enter between the outer coils of the winding, thereby resulting in a support to maintain the coil in position and to support the coils, especially as the material is unwound from the coil and during the last remaining coils of the winding.
The invention obviates the necessity of packaging the wound coil in a container and also eliminates the neces-sity of using a cone or other stabilizing materials to support the coil as it is transported and unwound during its use.
~his results from the fact that the thin transparent film enters the interstices of the outer coil winding and encapsulates the winding form. Individual coils are thereby held in position during transportation and payout which provides an extremely stable package. The resiliency of the film allows additional compression to take place during handling without individual turns of the coil slippirg out o~ place and also acts to completely contain the package walls. Because the corrugated cover disc is sized so that its diameter is just slightly larger than the inside diameter of the winding, the film enters the interstices o~ the edges '~
of the coil, thereby further increasing the stability of the package.
The method of packaging the wound coil may be further modified by applying a coating to the corrugated base and cover disc to provide an adhesive surface for the - film to cling to,t~ also further aid in encapsulating the coil windings. The effect of the skin holding the outer layers of the coil is transmitted inwardly layer by layer, each layer holding the one beneath it in place for shipping and payout. This provides the same or similar payout function-as cones in the prior art corrugated carton packaging techniques.
As a result of the packaging method of the invention, the costs of packaging a winding are lower than that of a corrugateâ container packaging. Furthermore, the skin-packaging techniques enabie most of the packaging to be done by automatic machinery thereby increasing the productivity such that the winding may be packagea immediately subsequent to its being wound.
BRIEF DESCRIPTION OF THE DRAWINGS
. _ , Figure la shows a wound coil that has been skin-packaged in accordance with the teachings of the invention;
Figure lb shows a cross section of the ou~ermost two layers of a wound coil and the manner in which the shrink wrap engages them; and Figures 2a-2d illustrate the manner in which the wound coil is skin-packaged in accordance with well-known skin-packaging techniques.
~6~
DETAILED DESCRIPTION
Figure la shows a wound coil that has been skin-packaged in accoxdance with the method of the invention.
The coil 10 rests on the pre-coated, pre-perforated, corrugated base stock member 12. On the upper end windings of coil 10 is cover disc 14 which is also pre-coated, pre-perforated, corrugated stock material. Prior to covering *he winding with a transparent skin, a payout tube 16 is inserted into the radial opening in the si.de of winding io.
. 10 As is readily apparent from Figure lb, the skin 18 lS sucked ^
between the interstices of the outer windings of coil winding 10' and 10'' and firmly and securely attaches the winding to the base member 12 (Figuxe la) such that it is sandwiched between the base member and the corrugated disc 14.
In preparation for the skin-packaging of the winding, the wound coil is placed on top of pre-coatedl pre-perforated, corrugated base element 12. Payout tube 16 is inserted into the radial opening of the winding 10. Pre-coated, pre-perforated,corrugated disc element 14 is then placed on the 29 top portion of winding 10. Disc element 14 has a diameter that is slightly larger than the inner diameter of winding 10 such that its outer peripheral edges rest on top of the windings of wound coil 10.
Wit~ reference to Figures 2a-2d, the assembled winding package is placed in the first station of a skin-packaging apparatus and may be automatically conveyed to the vacuum platen 18. Heater bank 20 is then energized to soften film 22 to a pliable, thermally-formable state. This is -illustrated in Figure 2a. Film frame 24 i5 caused ~o descend onto the assembled winding package as illustrated in ~igure 2b, thereby stretching the film 22 over the winding assembly 24. The vacuum system of the skin-packaging apparatus is then operated to exhaust air below the film and through outlet 26. As illustrated in Figure 2c, the vacuum draws the film in tight conformity to the wound package assembly encapsulating it in a tough, transparent plastic skin. The film 22 is simultaneously heat sealed to the surface of base member 12.
, As is illustrated in Figure 2d, the film frame is opened and the skin-packaged winding is discharged from the skin-packaging apparatus automatically re-threading the film for the next skin-packaging operation. The frame is then closed, the film is çut and the frame is elevated to its raised position, thereby permitting entry of a pre-loaded sheet for the next packaging cycle.
~681~
BACKGROUND OF THE INVE~TION
This invention relates to the packaging of wound coils, and more particularly ko the adaptation of skin-packaging to wound coils in which the material is unwound from the inside out through a radial opening in the side of the winding.
~ , .
Heretofore, windings which have been wound in a igure-8 configuration with at least one radial hole in the side of the windlng through which the inner end of the winding can be withdrawn have been packaged in corrugated boxes, with or without the use of supporting cones to aid in supportlng the wound coil during transportation and to prevent bird-nestlng as the coil is unwound. Such corrugated cardboard stock containers or boxes may also include apertures for inserting payout tubes through the radial opening in the side ol the winding to facilitate withdrawal or unwinding - of th-. wound coil. Normally, such packaging of wound coils is done by hand and is time consuming.
Si~MMARY OF THE INVENTION
In accordance wlth this invention, the wound coil is skin-packaged by placing a pre-coated, pre-perforated corrugated base'and a cover disc, having a diameter slightly larger than the inner diameter of the wound coil, on a packaging station. A payout tube is inserted in the radial 2i opening and threaded with the inner end of the wound coil and the wound coil is then placed on the perforated base.
$~
The cover disc is placed on top of the coil and a thin film placed over the coil and the base. ~n accordance with well-known techniques of skin packaging, a vacuum draws the film in tight conformity to the wound coil simultaneously with the applicatio~ of heat to encapsulate the coil and the base in the transparent plastic skin. The film is also heat se21ed to the surface of the base. During the skin packaging, the transparent film is caused to enter between the outer coils of the winding, thereby resulting in a support to maintain the coil in position and to support the coils, especially as the material is unwound from the coil and during the last remaining coils of the winding.
The invention obviates the necessity of packaging the wound coil in a container and also eliminates the neces-sity of using a cone or other stabilizing materials to support the coil as it is transported and unwound during its use.
~his results from the fact that the thin transparent film enters the interstices of the outer coil winding and encapsulates the winding form. Individual coils are thereby held in position during transportation and payout which provides an extremely stable package. The resiliency of the film allows additional compression to take place during handling without individual turns of the coil slippirg out o~ place and also acts to completely contain the package walls. Because the corrugated cover disc is sized so that its diameter is just slightly larger than the inside diameter of the winding, the film enters the interstices o~ the edges '~
of the coil, thereby further increasing the stability of the package.
The method of packaging the wound coil may be further modified by applying a coating to the corrugated base and cover disc to provide an adhesive surface for the - film to cling to,t~ also further aid in encapsulating the coil windings. The effect of the skin holding the outer layers of the coil is transmitted inwardly layer by layer, each layer holding the one beneath it in place for shipping and payout. This provides the same or similar payout function-as cones in the prior art corrugated carton packaging techniques.
As a result of the packaging method of the invention, the costs of packaging a winding are lower than that of a corrugateâ container packaging. Furthermore, the skin-packaging techniques enabie most of the packaging to be done by automatic machinery thereby increasing the productivity such that the winding may be packagea immediately subsequent to its being wound.
BRIEF DESCRIPTION OF THE DRAWINGS
. _ , Figure la shows a wound coil that has been skin-packaged in accordance with the teachings of the invention;
Figure lb shows a cross section of the ou~ermost two layers of a wound coil and the manner in which the shrink wrap engages them; and Figures 2a-2d illustrate the manner in which the wound coil is skin-packaged in accordance with well-known skin-packaging techniques.
~6~
DETAILED DESCRIPTION
Figure la shows a wound coil that has been skin-packaged in accoxdance with the method of the invention.
The coil 10 rests on the pre-coated, pre-perforated, corrugated base stock member 12. On the upper end windings of coil 10 is cover disc 14 which is also pre-coated, pre-perforated, corrugated stock material. Prior to covering *he winding with a transparent skin, a payout tube 16 is inserted into the radial opening in the si.de of winding io.
. 10 As is readily apparent from Figure lb, the skin 18 lS sucked ^
between the interstices of the outer windings of coil winding 10' and 10'' and firmly and securely attaches the winding to the base member 12 (Figuxe la) such that it is sandwiched between the base member and the corrugated disc 14.
In preparation for the skin-packaging of the winding, the wound coil is placed on top of pre-coatedl pre-perforated, corrugated base element 12. Payout tube 16 is inserted into the radial opening of the winding 10. Pre-coated, pre-perforated,corrugated disc element 14 is then placed on the 29 top portion of winding 10. Disc element 14 has a diameter that is slightly larger than the inner diameter of winding 10 such that its outer peripheral edges rest on top of the windings of wound coil 10.
Wit~ reference to Figures 2a-2d, the assembled winding package is placed in the first station of a skin-packaging apparatus and may be automatically conveyed to the vacuum platen 18. Heater bank 20 is then energized to soften film 22 to a pliable, thermally-formable state. This is -illustrated in Figure 2a. Film frame 24 i5 caused ~o descend onto the assembled winding package as illustrated in ~igure 2b, thereby stretching the film 22 over the winding assembly 24. The vacuum system of the skin-packaging apparatus is then operated to exhaust air below the film and through outlet 26. As illustrated in Figure 2c, the vacuum draws the film in tight conformity to the wound package assembly encapsulating it in a tough, transparent plastic skin. The film 22 is simultaneously heat sealed to the surface of base member 12.
, As is illustrated in Figure 2d, the film frame is opened and the skin-packaged winding is discharged from the skin-packaging apparatus automatically re-threading the film for the next skin-packaging operation. The frame is then closed, the film is çut and the frame is elevated to its raised position, thereby permitting entry of a pre-loaded sheet for the next packaging cycle.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Method of packaging wound coils wound in a flgure-8 configuration with a radial opening in the side thereof extending into the axial opening of the coil such that the coils may be unwound from the inside through the radial opening, comprising the steps of:
positioning the wound coil on a pre-coated, pre-perforated corrugated base;
positioning a pre-coated pre-perforated corrugated cover disc, having a diameter slightly larger than the inner diameter of the wound coil, on the wound coil opposite the corrugated base;
inserting a payout tube in the radial opening of the wound coil; and forming a thin film over the wound coil, corrugated base and cover disc, such that the film is formed in the interstices of the outer windings of the wound coil.
positioning the wound coil on a pre-coated, pre-perforated corrugated base;
positioning a pre-coated pre-perforated corrugated cover disc, having a diameter slightly larger than the inner diameter of the wound coil, on the wound coil opposite the corrugated base;
inserting a payout tube in the radial opening of the wound coil; and forming a thin film over the wound coil, corrugated base and cover disc, such that the film is formed in the interstices of the outer windings of the wound coil.
2. Method of packaging wound coils wound in a figure-8 configuration with a radial opening in the side thereof extending into the axial opening of the coil such that the coils may be unwound from the inside through the radial opening, comprising the steps of:
positioning the wound coil on a base;
positioning a cover disc, having a diameter slightly larger than the inner diameter of the wound coil, on the wound coil opposite the base;
inserting a payout tube in the radial opening of the wound coil; and forming a thin plastic film over the wound coil, base and cover disc such that the film is formed over the outer coil windings and in the interstices thereof to support the outer windings of the wound coil as the coils are unwound from the inside of the wound coil through the radial opening therein.
positioning the wound coil on a base;
positioning a cover disc, having a diameter slightly larger than the inner diameter of the wound coil, on the wound coil opposite the base;
inserting a payout tube in the radial opening of the wound coil; and forming a thin plastic film over the wound coil, base and cover disc such that the film is formed over the outer coil windings and in the interstices thereof to support the outer windings of the wound coil as the coils are unwound from the inside of the wound coil through the radial opening therein.
3. Method of packaging wound coils wound in a figure-8 configuration with a radial opening in the side thereof extending into the axial opening of the coil such that the coils may be unwound from the inside through the radial opening as claimed in claim 1, wherein the film is heated to be formed over the outer coil windings and in the interstices thereof.
4. Method of packaging wound coils wound in a figure-8 configuration with a radial opening in the side thereof extending into the axial opening of the coil such that the coils may be unwound from the inside through the radial opening as claimed in claim 3, wherein the heat is applied to the film in the step of forming it over the wound coil.
5. Method of packaging wound coils wound in a figure-8 configuration with a radial opening in the side thereof extending into the axial opening of the coil such that the coils may be unwound from the inside through the radial opening as claimed in any of claims 2, 3 or 4, wherein suction is applied to form the film over the outer coil windings and in the interstices thereof.
6. A package of wound coils wound in a figure-8 configuration with a radial opening extending into the central axial opening of the coils such that the coils may be unwound through the radial opening, comprising:
a pre-perforated corrugated base member for supporting the wound coils;
a pre-perforated corrugated cover disc having a diameter slightly larger than the inner diameter of the windings and positioned on the edge of the wound coil opposite said base member; and a shrink-wrap tightly enclosing said cover disc, the coil windings and said base member such that the shrink-wrap is embedded in the interstices of the outer windings of said wound coil.
a pre-perforated corrugated base member for supporting the wound coils;
a pre-perforated corrugated cover disc having a diameter slightly larger than the inner diameter of the windings and positioned on the edge of the wound coil opposite said base member; and a shrink-wrap tightly enclosing said cover disc, the coil windings and said base member such that the shrink-wrap is embedded in the interstices of the outer windings of said wound coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000389125A CA1168194A (en) | 1981-10-30 | 1981-10-30 | Skin-pack wound coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000389125A CA1168194A (en) | 1981-10-30 | 1981-10-30 | Skin-pack wound coils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1168194A true CA1168194A (en) | 1984-05-29 |
Family
ID=4121307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000389125A Expired CA1168194A (en) | 1981-10-30 | 1981-10-30 | Skin-pack wound coils |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1168194A (en) |
-
1981
- 1981-10-30 CA CA000389125A patent/CA1168194A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |