US3183802A - Container and method and apparatus for making the same or the like - Google Patents

Description

G. A. RUTLEDGE CONTAINER AND METHOD AND APPARATUS FOR MAKING May 18, 1965 A THE sum OR THE LIKE 2 Sheets-Sheet 1 Filed May 1. 1961 INVENTOR.

. GEORGE A. RUTLEDGE BY M,

) ljfw HIS ATTORNEYS FIG-4 G. A. RUTLEDGE METHO May 18, 1965 3,183, CONTAINER AND D AND APPARATUS FOR MAKING THE SAME OR THE LIKE 2 Sheets-Sheet 2 Filed May 1. 1961 mm L INVENTOR. GEORGE A. RUTLEDGE BY don, 94m,

HIS ATTORNEYS United States Patent Delaware Filed May 1, 1961, Ser. No. 106,629 17 Claims. (Cl. 93--80) This invention relates to improved containers or the like and to improved methods and apparatus for making such containers or the like; I

Heretofore, various paperboard containers for liquid, greasy, oily or other moisture-bearing or viscous products and the like have each been formed by helically winding paperboard container material onto a helically Wound metallic foil liner, the foil liner attempting to protect the paperboard container material from the prod- .uct. The exterior of the helically wound paperboard container material is covered with a helically wound protective wrapping material, such as metallic foil which forms the label for the container.

Since the paperboard container material provides the structural strength for such containers, the foil liner and wrapper need only be of sufiicient strength to hold the paperboard container material in its helically wound condition.

However, it has been found that it is not economical to form the liner and wrapper entirely of metal foil having the desired thickness for structural strength whereby various manufacturers have formed the liner and wrapper from a lamination of relatively thin metallic toil and a paper backing, the paper backing providing the structural strength for the liner or wrapper and the metallic foil providing the moisture barrier-for such liner and wrapper.

Such laminated liners are formed into the aforementioned containers by helically winding the laminated material with its foil side against a stationary mandrel and with adjacent edges of adjacent convolutions thereof overlapping each other to provide a lapped seam of the liner secured together by a suitable adhesive. Thereafter, the paperboard container material is helically wound and secured by a suitable adhesive onto the helically wound liner. Subsequently, the laminated wrapping material is helically wound and secured by a suitable adhesive onto the helically Wound container material with the foil side of the wrapping material facing outwardly.

Such container body stock is cut into container lengths whereby the opposed opened ends of the individual cut container bodies are subsequently closed by suitable cover members after the desired product has been disposed therein.

However, it has been found that when liquid, greasy, oily or other moistureabear-ing products are packaged in such prior known containers, the raw edge of the paper backing of the liner, by a wicking action, transmits the moisture, liquid or other viscous part of the packaged product from the interior of the container at the lapped seam of the liner to the paperboard container material causing deterioration, swelling, ply-separation and/ or failure of the paperboard container material whereby the prior known containers are not readily adaptable for packaging moistureabearing products and the like.

Further, it has been found that when the prior known paper backed foil liner is stored prior to being utilized in forming containers, the day-to-day changes in temperature and relative humidity adversely affect the paper backing causing a crossweb curl that handicaps the subsequent helical winding operation of the liner.

According to the teachings of this invention, however, an improved foil liner is provided for such containers ice or the like which prevents any wicking action and thereby renders such containers readily adaptable for packaging moisture bearing products and the like.

In particular, the liner of this invention comprises strips of polyethylene and metallic foil, such as aluminumcont-aining metallic rfoil or the like, laminated together by a suitable adhesive whereby the polyethylene provides a suitable backing for the relatively thin metallic foil and cooperates therewith to render the entire liner substantially moist-ureproof.

Such a liner can be formed into a container of this invention by the methods and apparatus of this invention or the like by helically winding the liner of the invention onto a stationary mandrel with adjacent edges of adjacent convolutions thereof overlapping each other, the foil side of the liner facing the mandrel. Such overlapped edges of the liner are heat sealed together bythe polyethylene backing thereof whereby the seam of the helically wound liner is rendered substantially moistureproof.

Thereafter, the paperboard container material and wrapping material are serially, helically wound onto the liner to complete the container body stock from which the individual containers can be formed, the individual containers being readily adapted to package moisturebearing products and the like because no wicking action is provided by the liner of this invention as is provided by the liners of the prior known containers.

Accordingly, it is an object of this invention to provide an improved container having one or more of the novel features set forth above or hereinafter shown or described.

Another object of this invention is to provide an improved liner for such a container or the like.

Another object of this invention is to provide improved methods for making such containers and liners.

A further object of this invention is to provide improved apparatus for making such containers and liners.

Other objects, uses and advantages of this invention are apparent from a reading of this description which proceeds with reference to the accompanying drawings forming a part thereof and wherein:

FIGURE 1 is a perspective view of a container of this invention.

FIGURE 2 is an exploded, perspective view of the container illustrated in FIGURE 1.

FIGURE 3 is an enlarged, axial, cross-sectional view illustrating the wicking problem provided by prior know-n containers.

FIGURE 4 isa view similar to FIGURE 3 and illustrates how the container of this invention prevents such wicking action of FIGURE 3.

FIGURE 5 is a schematic view illustrating one method for forming the lining material of this invention.

FIGURE 6 is a perspective schematic view illustrating the method and apparatus of this invention for forming the improved liners and container bodies of this invention.

FIGURE 7 is an axial cross-sectional view taken on line 7--7 of FIGURE 6, with background removed, and illustrating one of the heating means of this invention.

FIGURE 8 is an enlarged, fragmentary, cross-sectional view taken on line 8-8 of FIGURE 6 and illustrates the helically wound lining material of this invention.

FIGURE 9 is an enlarged, fragmentary, view taken on line 99 of FIGURE 6.

FIGURE 10 is a view similar to FIGURE 9 and is taken on line 1tllti of FIGURE 6.

FIGURE 11 is a schematic view illustrating one means for rotating and axially advancing the container stock produced by the method and apparatus of FIGURE 6.

Referring now to FIGURE 1, an improved cylindrical container of this invention is generally indicated by the reference numeral 20, the container 20 comprising a in a strip of relatively thin lining material 24 is helically wound upona stationary mandrel 25 in a manner hereinafter described to form a cylindrical lining core 26 and on which is helically wound a strip of relatively thick paperboard container material 27 to form the cylindrical base stock 28. Thereafter, a strip of relatively thin wrapping material 29 is helically wound onto the base stock 28 to form the cylindrical container body stock 30 which is subsequently cut into desired lengths to form the individual container bodies 21.

As previously set forth, prior known container bodies have been formed of helically wound paperboard container material having a liner on the interior surface thereof and a wrapper on the exterior surface thereof. However, it has been found that the construction of the prior known container bodies readily permits moisture from moisture-bearing products and the like to wick into the paperboard container material and thereby cause deterioration, swelling, ply-separation and failure of the container material whereby such prior known container bodies are not applicable for packaging greasy, oily and other moisture-bearing products.

In particular, a prior known container body 31 is illustrated in FIGURE 3 and comprises an inner liner 32 secured to the relatively thick paperboard container material 33 having a wrapper or label 34 secured on the exterior surface thereof.

The prior known liner 32 comprises a lamination of a relatively thin strip of metallic foil 35 and a relatively thick strip of paper backing material 36, the lining 32 being helically wound in such a manner that adjacent edges 37 of adjacent convolutions thereof overlap each other to define a spiral seam 38.

As previously stated, by forming the lining material 32 with the paper backing 36, a relatively thin strip of metallic foil 35 can be utilized whereby the overall cost of the lining material 32 is relatively small when compared to the cost of a liner formed solely of metallic foil having a suiiicient thickness to provide the necessary strength for the liner.

However, when a liquid, greasy, oily, or other moisturebearing product is packaged in the prior known container body 31, such as the liquid product 39 illustrated in FIG- URE 3, the raw edge of the paper backing 36 of the liner 32 is exposed to the product 39 at the spiral seam 38 and, through a wicking action, transmits the moisture of the product 39 to the paperboard container material 33 in the manner represented by the dash lines 40 of FIGURE 3 whereby the moisture transmitted to the paperboard container material 33 will cause early failure of the container body 31 in the manner previously described.

According to the teachings of this invention, however, the container body 21 is readily adapted to package liquid, greasy, oily or other moisture-bearing and viscous products without having any wicking action provided by the liner 24 thereof, as illustrated in FIGURE 4, even though adjacent edges 41 of adjacent convolutions of the helically wound lining material 24 overlap each other and define a spiral seam 42 exposed to the moisture-bearing product 43 in the same manner that the spiral seam 38 of the prior known container body 31 is exposed to the moisture-bearing product 39.

One of the reasons why no wicking action takes place in the container bodies 21 of this invention is because the lining material 24 thereof is formed completely of moistureproof materials while still being economical to manufacture.

In particular, as illustrated in FIGURE 5, the strip of lining material 24 is formed by laminating together a relatively thin strip of metallic foil 44, such as aluminumcontaining metallic foil or the like, and a relatively thin strip of moistureproof heat sealing means 45, such as polyethylene or the like.

While the strips of metallic foil 44 and polyethylene 45 can have any desired thickness, one embodiment of the liner 24 which has been found to be satisfactory for the intended purposes thereof comprises a strip of metallic foil 44 having a thickness of approximately 0.0005 of an inch and a strip of polyethylene 45 having a thickness of approximately 0.0005 of an inch.

The strip of lining material 24can be continuously formed by respectively drawing the strips of metallic foil 44 and heat sealing means 45 from supply rolls 46 and 47 thereof through a nip of a pair of pressure rolls 48 onto a windup roll 49. A suitable adhesive can be utilized for securing together the strips 44 and 45 by being applied to one or both of the mating surfaces of the strips 44 and 45 before the same pass through the pressure rolls 48. For example, the adhesive can be applied to the mating surface of the strip of heat sealing means 45 by an adhesive applicator roller 50 receiving adhesive from a suitable reservoir 51. If desired, the surface of the strip of'polyethylene 45 that receives the adhesive can be specially treated or coated to enhance the securing effect of the adhesive.

The thus formed strip of lining material 24 can be stored in roll form until subsequently utilized to form the container 26 of this invention or the like.

Since the lining material 24 of this invention is formed entirely of moisture-barrier materials, the stored lining material 24 is not subject to adverse effects by day-today changes of temperature and relative humidity whereas the paper backing 36 of the prior known lining 32 is adversely affected by such changes as well-as subject to contamination by moisture and the like in the storing area.

Further, because only the foil strip 35 of the prior known lining material 32 provides a moisture barrier whereas both the foil strip 44 and heat sealing strip 45 of the lining material 24 of this invention are moisturebarrier materials, a thicker moisture barrier is provided by the lining material 24 of this invention than is provided by the prior known lining material 32.

While FIGURE 5 illustrates one method for forming the lining material 24 of this invention, it is to be understood that other methods may be utilized to provide a foil face and an opposed heat sealing face for the lining material 24. For example, when the heat sealing means 45 is formed of a thermo-plastic material, the thermoplastic material has to be sprayed or otherwise applied onto the metallic foil 44 whereby the heat sealing eflfect of the liquified thermo-plastic material provides the sole securing means between the foil 44 and heat sealing means 45. Alternately, a sheet of thermo-plastic material 45 can be laminated to the sheet of metallic foil 44 by passing the same through a heating zone whereby the thermo-plastic material 45 is heat sealed to the metallic foil 44. In either event, the thus laminated lining material 24 can have adjacent edges of adjacent convolutions thereof heat sealed together by re-heating one edge of the lining material 24 in a manner hereinafter described.

The method and apparatus of this invention for forming the container bodies 21 will now be described, and reference is made to FIGURE 6.

As illustrated in FIGURE 6, the hollow cylindrical mandrel 25 is secured in cantilevered fashion to a supporting structure 52 and has a free end 53 thereof disposed from the supporting structure 52, the mandrel 25 having any desired diameter depending upon the size of the container to be subsequently produced.

The strip of lining material 24 is angularly fed onto the stationary mandrel 25 from the free-wheeling supply roll 49 thereof, the lining material 24 being helically wound onto the mandrel 25 in such a manner that adiacent edges 41 of adjacent cOnvolutions thereof overlap each other as illustrated in FIGURE 8 to define the aforementioned spiral seam 42 of the liner core 26.

The strip of lining material 24 is fed onto the mandrel 25 in such a manner that the metallic foil side thereof is disposed against the mandrel 25 with the polyethylene or heat sealing side thereof facing outwardly from the mandrel 25, the strip of lining material 24 being continuously fed onto the mandrel 25 because the lining core 26 being produced therefrom is being continuously rotated and axially advanced to the right in a manner hereinafter described.

While no special means need to be provided to facilitate the rotation and axial sliding of the lining core 26 on the mandrel 25, the outer surface of the mandrel 25 could be covered with slip material, such as tefion or the like, or the outer surface of the foil face 44 of the lining material 24 could be coated or treated with slip material, if desired.

As the traveling web of lining material 24 is continuously wound onto the mandrel 25 in a manner hereinafter described, one edge 54 of the heat sealing side 45 of the .lining material 24 passes over a heating zone 55 before the same is helically wound onto the mandrel 25.

In this manner, the heated edge 54 of the heat sealing side 45 of the strip of lining material 24 is adapted to be subsequently overlapped by the foil side 44 of the opposed edge 56 of the strip of liner material 24 on the mandrel 25 whereby the foil side 44 of the edge 55 of the strip of lining material 24 is superimposed on the heated edge 54 of the lining material 24 and heat sealed thereto by the heated heat sealing means or polyethylene 45 in such a manner that a complete moistureproof spiral seam 42 is provided by the overlapped edges 54 and 56 of the lining material 24.

Thus, it can be seen that no additional adhesive means is required to seal closed the overlapping edges 54 and 56 of the helically wound lining material 24 because the fusion between the heat sealing side 45 and the foil side 44 of the lining material 24 at the overlapping edges 54 and 56 completely seals the spiral seam 42 so that no moisture can pass between the overlapping edges 54 and 56 of the lining material 24.

While any suitable means may be provided for forming the heating zone 55 previously described, one means for heating the heat sealing side 45 of the edge 54 of the lining material 24 is illustrated in the drawings and comprises an elongated burner 57 disposed beneath the traveling web 24 closely adjacent to where the web 24 winds onto the mandrel 25, the burner 57 having a series of aligned apertures formed therein and through which a suitable mixture of gas and air are expelled and ignited to form the flames 58 which heat the heat sealing side 45 of the edge 54 of the traveling web 24 just before the web 24 is wound onto the mandrel '25.

One embodiment of the burner 57 that has been found satisfactory comprises an elongated flat-sided pipe having a plurality of alinged apertures formed therein, the apertures being approximately of an inch in diameter and producing flames for a distance of approximately 6 inches from the crotch of the traveling web; 24 toward the supply roll 49 thereof.

While a gaseous heating means has been illustrated in the drawings, it is to be understood that other suitable (heating means may be provided for performing the heat sealing operation previously described. For example, electrical means, such as a cal-rod or the like, may be utilized to heat the heat sealing side 45 of the edge 54 of the lining material 24.

The strip of lining material 24 is continuously helically wound onto the stationary mandrel 25 because the lining core 26 being produced therefrom is continuously rotated and axially advanced to the right on the mandrel 25 in a manner hereinafter described to continuously draw the strip of lining material 24 onto the mandrel 25.

The strip of paperboard container material 27 is angularly fed onto the rotating and axially advancing core '26 of lining material 24 at a point advanced from the traveling web 24, the container material 27 being fed onto the core 26 from a free-wheeling supply roll 59 and, preferably, overlapping the spiral seam 42 of the liner core 26. Suitable adhesive is applied to the under side of the traveling web 27 by a roller 60 receiving adhesive from a reservoir 61 so that the container material 27 being wound onto the core 26 of lining material 27 will be secured thereto and form the base stock 28.

The container material 27 is fed onto the core 26 of lining material 24 in such a manner that adjacent edges 62, Figure 9, of adjacent convolutions of the helioally wound container material 27 are disposed in abutting relation rather t-han in overlapping relation to form a spiral seam 63.

While the strip of paperboard container material 27 is il=lustrated as being a single ply of material, it is to be understood that the container material 27 can comp-rise any number of plies suitably secured together or that the base stock 28 can be formed by feeding separate plies of container material 27 onto the advancing liner core, 26, if desired.

Subsequently, the strip of wrapping or label material 29 is angularly fed onto the rotating and axially advancing stock 28 at such an angle thereto that adjacent end edges 64 of the wrapping material 29 overlap each other in the manner illustrated in Figure 10 to define a spiral seam 65, the strip of wrapping material 29 being drawn from a free-wheeling supply roll 66 and passing over an adhesive applicator roll 67 receiving adhesive from a reservoir 68 whereby the under surface of the wrapping material 29 is adhered to the outer surface of the helically wound container material 27. If required, the heat sealing side 45 of the lining material 24 can have a suitable coating thereof to enhance the securing eflfect of the ad hesive disposed between :the paperboard container material 27 and the lining material 24.

Preferably, the wrapping material 29 is wound onto the base stock 28 in such a manner that the same completely overlaps the spiral seam 63 of the helically wound container material 27.

While the container material 27 and the wrapping material 29 are illustrated as being fed over the mandrel 25, it is to be understood that one or both can be fed under the mandrel in the same manner that the lining material 24 is being fed under the mandrel 25. Similarly, the lining material 24 can be fed over the mandrel by repositioning the heating zone 55.

As the wrapping material 29 is being :helically wound onto the stock 28, the same forms the container body stock 50 which continuously rotates and axially advances to the right beyond the free end 53 of the stationary mandrel 25 whereby appropriate lengths 70 of the container body stock 30 can be severed from the apparatus of this invention by a suitable cutter 69 in a manner well known in the art. Preferably, the cutter 69 is adapted to cut relatively long lengths 70 of container stock 3b which can be subsequently cured and stored until it is desired to cut the same into the individual lengths to form the container bodies 21 previously described.

The cutter 69, in a manner well known in the art, is adapted to descend from the position illustrated in FIG- URE 6 against the container body stock 30 to cut a length therefrom, by being simultaneously axially advanced to the right at the same speed as the speed of the axially advancing container stock 39. Thereafter, the cutter 69 is raised and indexed back to the position illustrated in FIGURE 6 to repeat its cutting cycle, when desired.

While any suitable means can be utilized for rotating and axially advancing the container body stock 30 on the mandrel 25 in order to cause the traveling webs 24, 2'7, and 29 to be continuously helically Wound thereon in the manner previously described, one such means is 7 illustrated in FIGURES 6 and 1-1 and comprises a continuous and angularly disposed crossed belt 71 traveling in the direct-ion indicated by the arrows and having a portion 72 thereof wrapped around the container stock 30 at a point, preferably, where the belt 71 overlaps the spiral seam 65 of the Wrapping material 29.

In this manner, as the belt 71 continuously moves in the direction indicated by the arrows, the belt '71, through frictional contact with the container body stock 30, rotates and axially advances the container body stock 3d on the mandrel to cause the traveling webs 24, 27, and 29 to be continuously helically wound onto the mandrel 25 in the manner previously set forth. 7 7

The belt 71 passes over a pair of pulleys 73 and 74 respectively rotatably carried by a suitable supporting means 75, the pulleys 73 and 74 respectively carrying beveled gears 76 and 77 disposed in meshing relation with a pair of beveled gears 78 and 79 interconnected together by a shaft 80. The beveled gear 76 of the pulley 73 is disposed in' meshing relation with another beveled gear 81 carried on the end of a drive shaft 82 which, when rotated, causes rotation of the pulley 73 in a particular direction While the gear train 78, 79 causes counter rotation of the pulley 74 in unison with the pulley 73.

In this manner, the continuous crossed belt 71 is adapted to continuously operate to rotate and axially advance the container body stock on the mandrel 25.

Not only does the belt 71 rotate and axially advance the container body stock 30, but also the looped portion 72 thereof is utilized to compactly compress together the overlapping ends 64 of the wrapping material 29 to further enhance the securing effect of the adhesive disposed between the overlapping ends 64 of the wrapping material While the wrapping material 29 can be formed in any suitable manner, it is preferred that the wrapping material 29 include a lamination of metallic foil 83 and a paper backing 84 secured together by a suitable adhesive in a manner well known in the art whereby the metallic foil 83 forms the outer surface of the container body stock 30 to provide a moisture barrier protecting the paperboard container material 27 and also provide an attractive means for carrying suitable advertising medium and the like printed thereon. If desired, a suitable scuff resistant coating can be applied over the foil surface 83 of the wrapping material 29.

However, the wrapping material 2), in accordance with the teachings of this invention, can be formed in the same manner as the lining material 24 and have an outer foil face and an inner heat sealing face whereby the overlapping edges of adjacent convolutions thereof are secured together by heating the heat sealing face thereof. In this manner no wicking action would be provided by the label or wrapper as would be provided by the prior known label or wrapper 34 of FIGURE 3.

In particular, the wrapping material 29 can comprise a lamination of metallic foil and a backing of heat sealing means and be fed onto the base stock 2.8 in'the same manner as the wrapping material 29 of FIGURE 6. However, the adhesive applicator roll 67 would be eliminated and suitable adhesive would be applied to the upper surface of the container material 27 in a manner well known in the art to provide suitable means to secure the wrapping material 29 to the base stock 23.

In this manner the adhesive applied to the outer surface of the base stock 28 would not interfere with a subsequent heat sealing operation of the overlapping edges of the modified wrapping material 29.

For example, the heater 57 of FIGURE 6 could be located adjacent and below the right-hand edge of the modified wrapping material 29 at a point just prior to where the wrapping material 29 is fed onto the base stock 28 to heat the heat sealing face thereof and to permit the overlapping edges of the modified wrapping material 29 to be heat sealed together. Thus, a complete moisture- Cit ,tainer bodies 21 therefrom.

proof spiral seam '65 is provided by the modified wrapping material 29 whereby no wicking action is provided thereby should the subsequently formed container 20 be subject to moisture and the like or the exterior thereof.

After the lengths 70 of container body stock 39 have been formed in the above manner, the same are cured and stored until it is desired to form the individual con- After the individual container bodies 21 have been cut from the lengths 70 of container body stock 30, the same are adapted to have the opposed open ends 22 thereof closed by the end closures 23, FIGURE 2, in a conventional manner.

In particular, each end closure 23 has an outer annular bead 85 which defines an annular channel 86 adapted to receive a respective end 22 of the container body 21. After the end 22 of the container body 21 has been received in the annular channel 86 of an end closure 23, the bead 85 is crimped against the end 22 of the container body 21 to hold the end closure 23 in place on the container body 21 in a manner well known in the art.

Accordingly, it can be seen that an improved paperboard container is. provided by this invention which is readily adapted to package liquid, greasy, oily, and other moisture-bearing or viscous products because the liner of the container prevents any transfer of the moisture portion of the product to the paperboard materialof the container.

Further, this invention provides improved methods and apparatus for making such containers and liners as well as for making the lining wrapping materials of this invention.

While the form of the invention now preferred has been disclosed as required by the statutes, other forms may be used, all coming within the scope of the claims which follow.

What is claimed is:

l. A method for making a container body or the like comprising the steps of helically winding a strip of lining material whereby adjacent edges of adjacent convolutions thereof overlap each other, heat sealing together only said overlapping edges of said lining material by only heating a portion of said lining material whereby no wicking action can take place at the spiral seam of said lining material, helically winding a strip of container material on to said helically wound strip of lining material, and helically winding a strip of wrapping material on to said helically wound strip of container material.

2. A method for making a liner for a container or the like comprising the steps of helically winding a strip of lining material whereby adjacent edges of adjacent convolutions thereof overlap each other, and heat sealing together only said overlapping edges of said lining material by only heating a portion of said lining material whereby no wicking action can take place at the spiral seam of said lining material.

3. A method for making a liner for a container or the like comprising the steps of helically winding a strip of lining material on to a mandrel whereby adjacent edges of adjacent convolutions thereof overlap each other, and heat sealing together only said overlapping edges of said lining material by only heating a portion of said lining material whereby no wicking action can take place at the spiral seam of said lining material.

4. A method as set forth in claim 3 wherein said heat sealing step includes the step of heating only one edge of the strip of lining material at a point advanced from said mandrel.

5. A method as set forth in claim 3 wherein said heat sealing step includes the step of heating only one edge of the strip of lining material by burning material adjacent said one edge.

6. A method for making a liner for a container or the like comprising the steps of laminating together a strip of metallic foil and a strip of heat sealing means to form a strip of lining material, helically winding said strip of lining material on to a mandrel with the foil side thereof against said mandrel and with adjacent edges of adjacent convolutions of said lining material overlapping each other, and heat sealing together only said overlapping edges of said lining material by heating only one edge of said lining material whereby said heat sealing means of said lining material heat seals together said overlapping edges and whereby no wicking action can take place at the spiral seam of said lining material.

7. A method as set forth in claim 6 wherein said heat sealing side of said lining material is heated.

8. A method as set forth in claim 6 wherein said step of heat sealing said overlapping edges of said lining material includes the step of heating one edge of said lining material before said lining material is helically wound onto said mandrel.

9. Apparatus for forming container body stock or the like comprising a mandrel, means for helically winding a strip of lining material on to said mandrel with adjacent edges of adjacent convolutions of said lining material overlapping each other to form a lining core, means for heat sealing only said overlapping edges of said lining material by heating only a portion of said lining material, means for helically winding a strip of container material onto said lining core to form base stock, and means for helically winding Wrapping material onto said base stock to form said container body stock.

10. Apparatus for forming a cylindrical liner for container body stock or the like comprising a mandrel, means for helically win-ding a strip of lining material onto said mandrel with adjacent edges of adjacent convolutions of said lining material overlapping each other to form said cylindrical liner, and means for heat sealing only said overlapping edges of said lining material by heating only a portion of said lining material.

11. Apparatus for forming a cylindrical liner for container body stock or the like comprising a mandrel, means for helically winding a strip of lining material onto said mandrel with adjacent edges of adjacent convolutions of said lining material overlapping each other to form said cylindrical liner, and means for heating only one edge of said strip of lining material to heat seal together only said overlapping edges of said lining material.

12. Apparatus as set forth in claim 11 wherein said heating means heats said one edge of said lining material before said lining material is wound onto said mandrel.

13. Apparatus as set forth in claim 11 wherein said heating means includes an open flame.

14. Apparatus for forming a cylindrical liner for container body stock or the like comprising a mandrel, means for helically winding a strip of lining material onto said mandrel with adjacent edges of adjacent convolutions of said lining material overlapping each other to form said cylindrical liner, said liner having a foil face forming the interior surface of said liner and having a heat sealing face forming the exterior of said liner, and means for heating only one edge of the heat sealing face of said lining material to heat seal together only said overlapping edges of said lining material.

15. Apparatus as set forth in claim 14 wherein said heating means includes an open flame directed toward said heat sealing face of said lining material.

16. A method for making a wrapper for a container body comprising the steps of helically winding a strip of wrapping material onto container body stock whereby adjacent edges of adjacent convolutions thereof overlap each other, and heat sealing together only said overlapping edges of said Wrapping material by only heating a portion of said wrapping material whereby no wicking action can take place at the spiral seam of said wrapping material.

17. Apparatus for forming container body stock or the like comprising a mandrel, means for providing container base stock on said mandrel, means for helically Winding a strip of wrapping material onto said base stock with adjacent edges of adjacent convolutions of said wrapping material overlapping each other, and means for heat sealing only said overlapping edges of said wrapping material by only heating a portion of said wrapping material.

References Cited by the Examiner UNITED STATES PATENTS 1,715,349 6/29 Bodman 229--3.5 2,555,380 6/51 Stuart 2293.5 2,861,022 11/58 Lundsager.

2,901,162 8/59 Vallas 229-45 X 2,943,540 7/60 McBain 93-94 2,982,457 5/61 DAlelio 229--4.5 X 2,988,970 6/61 Geist 9394 GEORGE O. RALSTON, Primary Examiner. EARLE J. DRUMMOND, Examiner.

Claims (1)

1. A METHOD FOR MAKING A CONTAINER BODY OR THE LIKE COMPRISING THE STEPS OF HELICALLY WINDING A STRIP OF LINING MATERIAL WHEREBY ADJACENT EDGES OF ADJACENT CONVOLUTIONS THEREOF OVERLAP EACH OTHER, HEAT SEALING TOGETHER ONLY SAID OVERLAPPING EDGES OF SAID LINING MATERIAL BY ONLY HEATING A PORTION OF SAID LINING MATERIAL WHEREBY NO WICKING ACTION CAN TAKE PLACE AT THE SPIRAL SEAM OF SAID LINING MATERIAL, HELICALLY WINDING A STRIP OF CONTAINER MATERIAL ON TO SAID HELICALLY WOUND STRIP OF LINING MATERIAL, AND HELICALLY WINDING A STRIP OF WRAPPING MATERIAL ON TO SAID HELICALLY WOUND STRIP OF CONTAINER MATERIAL.

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