|Publication number||USRE36639 E|
|Application number||US 08/649,918|
|Publication date||Apr 4, 2000|
|Filing date||May 16, 1996|
|Priority date||Feb 14, 1986|
|Publication number||08649918, 649918, US RE36639 E, US RE36639E, US-E-RE36639, USRE36639 E, USRE36639E|
|Inventors||Aziz A. Okhai|
|Original Assignee||North American Container, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (20), Referenced by (92), Classifications (10), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
.[.This.]. .Iadd.This is a continuation of reissue application Ser. No. 08/166,744 of Dec. 14, 1993 now abandoned, which .Iaddend.is a continuation of application Ser. No. 112,607 filed as PCT/GB87/00102, Feb. 12, 1987, published as WO87/04974, Aug. 27, 1987, now abandoned.
The present invention is concerned with plastics containers and particularly with blow-moulded plastic bottles made from oriented thermoplastic materials such as PET and intended for use as containers for carbonated beverages.
The use of blow-moulded bottles as containers for pressurized liquids such as carbonated soft drinks, beers, ciders etc. presents a number of problems. In particular, the internal pressure generated by such liquids tends to distort the thin, flexible walls which are characteristic of blow-moulded bottles. This applies particularly to the base portion of the bottle.
Previously, this problem has been obviated by the use of a hemispherical base which distributes the pressure as evenly as possible and thus prevents distortion. Such a base is, however, inherently unstable and some means is required to allow the bottle to be free-standing. One approach is to attach a basecup to the hemispherical base, but this obviously increases manufacturing costs. There are also problems with adhesion and inaccurate positioning of the basecup which may result in a bottle which does not stand vertically.
Accordingly attempts have been made to produce a one-piece, blow-moulded bottle which is usable with pressurized liquids.
There have been many proposals for designs of such bottles, generally including either bases having a central concave portion, or a generally convex base with a plurality of stabilizing feet blown out therefrom, however none of these have been totally satisfactory in use. Problems encountered include creep and distortion of the bottle material, stress cracking, and poor resistance to impact. A typical bottle base is shown in FIG. 1 of the accompanying drawings and comprises a generally hemispherical section 2 having stabilizing feet 4 blown out therefrom. Such bottles are blow-moulded from an injection moulded preform as follows: the preform is heated, enclosed within a mould corresponding to the desired shape of the bottle, stretched by a stretch-rod inserted through the neck of the preform, and then blown. The stretch-rod stretches the preform to the full length of the mould so that the bottom of the preform impinges upon the bottom of the mould. The material which contacts the bottom of the mould at this stage is "frozen" so that when the bottle is blown the material around the centre of the base remains unoriented and relatively weak. In a bottle such as that of FIG. 1 this area of unoriented material extends well into the feet 4 of the base so that the base structure is weakened and becomes subject to creep and distortion. Additionally, the transition from unoriented to oriented material is relatively abrupt, creating weak points where the transition occurs and reducing the resistance of the base to stress cracking or the like. These problems can obviously be overcome by making the base thicker; however this increases the amount of material required and hence the weight of the bottle. Thus, the advantages of a one piece bottle over a conventional base cupped bottle are substantially reduced.
It is an object of the present invention to obviate or mitigate these disadvantages.
Accordingly, the invention provides a container of blow-moulded oriented thermoplastic material which is formed by enclosing a heated moulded preform within a mould corresponding to the shape of the container and stretching it to the full length of the mould so that its bottom surface impinges upon the bottom surface of the mould prior to blow-moulding, said container comprising a generally cylindrical body portion and a base portion closing the bottom end of said body portion wherein said base portion is a figure of rotation formed by rotating a generally convex curve extending from the bottom of said side wall to the central longitudinal axis of the container about said central axis so as to define an annular convex surface having a central re-entrant portion, and wherein said preform, when stretched prior to blow-moulding, impinges upon a projecting central portion of the bottom of the mould corresponding to said re-entrant portion, such that, when blow-moulded, the material in the vicinity of said re-entrant portion remains unoriented and relatively thick in comparison with the oriented material of the remainder of the base portion.
Preferably the base portion is provided with a plurality of radial webs extending from the bottom of the body portion towards the centre of the base portion and dividing said annular convex surface into a plurality of feet spaced around the circumference of the base.
According to a second aspect of the invention, a plastic container comprises a generally cylindrical body portion and a base portion closing the bottom end of said body portion, said base portion comprising an annular convex surface having a central re-entrant portion, the walls of said re-entrant portion being substantially thicker than the walls of the remainder of said base portion.
The ratio of the thickness of the walls of the re-entrant portion to the walls of the remainder of the base portion is preferably in the range 1.2:1 to 10:1, and the angle of divergence of the side walls of the re-entrant portion is preferably less than 60°. It is also preferred that the diameter of the re-entrant portion is in the range 5% to 30% of the overall base diameter and more preferably in the range 10% to 20% thereof.
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which:
FIG. 1 illustrates the prior art, as discussed above;
FIG. 2 is a diametrical cross-section of the base portion of a container forming the basis of the present invention;
FIG. 3 is a perspective view of the base of FIG. 2;
FIGS. 4 to 9 show variations of the base of FIGS. 2 and 3, wherein
FIG. 4 shows a base comprising part-circular, arcuate portions;
FIG. 5 shows a base comprising semi-elliptical portions;
FIG. 6 shows a base including straight line and part-circular portions;
FIG. 7 shows a base modified by the addition of convex, stabilizing projections;
FIG. 8 shows a base modified by the addition of strengthening and stabilizing concavities; and
FIG. 9 shows a base comprising a combination of part-circular arcs of differing radii and centers of curvature;
FIGS. 10 and 11 are diametrical cross-sections of further modified base portions;
FIGS. 12 and 13 are respectively a sectional side and a bottom view of a particularly preferred embodiment of the invention;
FIGS. 14 and 15 are sectional side views of containers similar to that of FIGS. 12 and 13; and
.[.FIG. 16 shows a conventional plastics container for comparison with FIGS. 14 and 15..].
Referring now to the accompanying drawings, FIGS. 2 and 3 show the base of a blow-moulded container, such as a bottle 10 having a generally cylindrical side wall 11 of radius R1, an upper neck portion (not shown) and a base portion 12 closing the bottom end of the wall 11. In diametrical cross-section the base 12 comprises first and second downwardly convex semicircular portions 14 and 16, having radii R2 equal to half the radius R1, extending downwardly from the side wall 11 and converging at the mid-point of the base portion 12 to form a cusp 18.
The shape of the base 12 is shown in FIG. 3 wherein each of the "longitudinal" lines 20 corresponds to the sectional outline of FIG. 2 and is essentially a figure of revolution of one of the semicircular portions 14 and 16 about the central longitudinal axis of the bottle 10, defining an annular convex surface having a central re-entrant portion.
In blow-moulding a base of this shape, stretching the preform causes the bottom thereof to contact the base of the mould only at the point of the cusp 18 so that unoriented material in the base portion 12 is restricted virtually to that point only. Variations in this basic shape are shown in FIGS. 4 to 7.
The base 12a of FIG. 4 comprises first and second circular arcs 26, 28, having radii R4 greater than half R1, and converging at a point 30, and the base 12b of FIG. 5 comprises first and second semi-elliptical portions 32, 34--each having a bottom portion 36 of radius R5, again greater than half R1, and outer and inner peripheral portions 38 of radius R6, less than half R1--converging at point 40.
FIG. 6 shows a base similar to that of FIG. 1 having semicircular portions 48 wherein straight line portions 45, 46 are incorporated into the outer and inner walls of the semicircular portions 48. The straight line portions 45 thus form an upwardly diverging frusto-conical section around the outside of the base and the straight line portions 46 form a downwardly diverging frusto-conical section around the central re-entrant portion. Such straight line portions may similarly be incorporated into the bases of FIGS. 4 and 5, and more than one straight line portion may be incorporated into both the inner and outer walls.
FIG. 7 shows a further modification of the basic shape of FIG. 1 wherein the semicircular portions 52 of the base 12c with peripheral, outwardly convex projections 50, of radius R8. These projections 50 serve to increase the effective base diameter from D1 to D2 and so improve the stability of the bottle. The projections 50 may form a continuous peripheral rim or may be formed as a plurality of discrete "blisters" spaced around the circumference of the base. This modification can also be applied to the bases of FIGS. 4, 5 and 6.
FIG. 8 illustrates a further feature which may be incorporated into any of the bases described; that is, an upwardly concave portion 54 of radius R9 formed in the bottom of each convex portion 56. This further strengthens the base and gives some improvement in stability.
The shape of the convex portions of the base may be further varied as shown in FIG. 8 to increase the effective base diameter and hence the stability of the bottle. In FIG. 9, each convex portion 69 comprises a first convex arcuate portion AB of radius R14 (greater than half the radius R1 of the cylindrical body portion) and centre of curvature 70, extending from the bottom of the cylindrical wall of the bottle, a second convex arcuate portion BC of radius R15, less than R1, and centre 72 which forms the apex of the convex portion 69, and a third convex arcuate portion CD of radius R16, greater than R1 and centre 74, extending upwardly towards the centre of the bottle. A cusp 76 is formed by arcs DE of radius R17, half R1 or less than R16. Additionally, the portions AB and CD may be replaced by, or include, generally straight-lined portions as previously described in relation to FIG. 6.
As previously explained, the bases described thus far substantially eliminate any unoriented material from .Iadd.areas other than the center of the bottom surface .Iaddend.and are useful in many applications. It has been found, however, that they may not be sufficiently strong to prevent their re-entrant portions being blown out by the internal pressures generated by more highly pressurized liquids, especially in larger bottle sizes. This can be prevented by thickening the wall of the re-entrant portion, which may be accomplished by reintroducing an amount of unoriented material into the re-entrant portion.
This may be achieved simply by truncating the central cusp 18, as at dotted line 78 of FIG. 2. In this way the bottom of the preform, when stretched, contacts a projecting surface of the bottom of the mould so that a limited amount of relatively thick unoriented material is present around the centre of the base when the bottle is blown. This strengthens the re-entrant portion but will not materially affect the overall strength of the base so long as the unoriented material is restricted substantially to the re-entrant portion itself.
It has also been found that the shape and size of the re-entrant portion is important in obtaining a sufficiently strong structure. For example, by simply truncating the cusp 18 of FIG. 2 as described, the sides of the re-entrant portion diverge at a relatively large angle so that its resistance to deformation is limited. It is preferred, therefore to modify the shape of the re-entrant portion such as is shown in FIGS. 10 and 11.
The base of FIG. 10 comprises first and second downwardly convex portions 80, 82 as before. In this case, however, the re-entrant portion has been modified to take the form of a truncated cone 84 having relatively steep sides 86, 88 and closed by a substantially flat top surface 90. The remainder of the convex portions 80,82 may each comprise, for example, an arcuate bottom portion 92 and a straight line outer side wall 94. As illustrated, the base is further provided with peripheral stabilizing feet 96 spaced around its circumference.
The base of FIG. 11 comprises first and second convex portions 98, 100, somewhat similar to those of FIG. 9, and having its central re-entrant portion modified in a similar manner to that of FIG. 10 so as to define a flat-topped, truncated cone 102 extending upwardly from the points 104, 106. This base is further modified by the introduction of radial webs 108 extending from the base of the side walls 110 of the container to the base of the central truncated cone 102. These serve to further strengthen the base by dividing the annular surface defined by rotation of the convex portions 98, 100 into a plurality of segments.
As explained above, when moulding bases of FIGS. 10 and 11, the stretched preform impinges upon the projecting surface of the mould-bottom corresponding to the top surface of the truncated cones 84, 102 such that the material in the vicinity of this surface remains unoriented and relatively thick when the bottle is blown, such unoriented material being largely confined to the cones 84, 102 themselves.
A further advantage which arises from moulding a bottle in this shape is that the .Iadd.the area of unoriented relatively thick material contains and protects the gate area of the preform and provides .Iaddend.a gradual transition between unoriented and oriented material .[.is obtained.]. .Iadd.and reduces stress on the transition between the unoriented and oriented material to prevent separation .Iaddend.so that the weak points created by the abrupt transition observed in conventional bottles are eliminated. Thus, in the present case, the strength of the base will not be so greatly affected if the unoriented material does extend beyond the .[.central truncated cone.]. .Iadd.center of the bottom surface.Iaddend.. This factor is particularly relevant to the enhanced resistance of the base to stress cracking.
FIGS. 12 and 13 show a particularly preferred embodiment of the invention somewhat similar to that of FIG. 11. As in FIG. 11, the base is divided into segments by radial webs 112 extending from the vertical side wall 114 of the bottle to the bottom of the central re-entrant portion 116, thereby defining a plurality of stabilizing feet 118. Each web 112 comprises a first straight line portion 120 extending downwardly and inwardly from point A to point B at an angle of 32° to the vertical, an arcuate portion 122 of radius R18 and centre 124 extending from point B to point C, and a second straight line portion 126 extending from point C to point D at an angle of 17° to the horizontal. In profile, the feet 118 each comprise a first arcuate portion 128 of radius R19 and centre 130 extending from point A to point E, a second arcuate portion 132 of radius R20 and centre 134 extending from point E to point F, and a straight line portion 136 extending upwardly and inwardly at an angle of 20° to the horizontal to meet the second straightline portion of the web 112 at point G. The feet 118 themselves preferably comprise generally planar lateral and bottom surfaces 138 and 140 and a curved outer surface 148.
The central re-entrant portion 116 is radiused into the web 112 at point D by an arcuate portion 150, radius R21 and centre 152, and the side walls thereof are defined by a further arcuate portion 154, radius R22 and centre 156. The upper end of the re-entrant portion is closed by a substantially flat surface 158. As is best seen in FIG. 13, the webs 112 define generally convex strips of material 160 such that the feet 118 are spaced from one another around the circumference of the base. As illustrated the base is provided with six feet 118.
Suitable dimensions for a two liter bottle as shown in FIGS. 12 and 13 are as follows: overall radius of base--53 mm; R18--60 mm; R19--40 mm; R20--5 mm; R21--10 mm; R22--10 mm. The top surface 158 of the re-entrant portion 116 is 10 mm in diameter and the re-entrant portion 116 itself is 7.5 mm deep. A one liter bottle might have a base radius of 44.3 mm with the other dimensions scaled accordingly.
In some cases, it may be preferable to replace the flat top surface 158 of the re-entrant portion 116 with an upwardly domed surface. The profile of the radial webs 112 may also be varied to comprise different combinations of arcuate and/or straight line portions.
The diameter of the re-entrant portion 116 should be to a range of 5% to 30% of the overall base diameter and preferably in the range 10% to 20% and the angle of divergence of the sidewalls of the re-entrant portion preferably less than 60°. Additionally, as previously stated, the unoriented material forming the walls of the re-entrant portion 116 is thicker than the walls of the remainder of the base and the ratio of the thicknesses of these walls should be in the range 1.2:1 to 10:1. Outside this range the base may be blown out due to internal pressure so that the thickness of the base as a whole would have to be increased, increasing the weight and cost of the bottle.
FIGS. 14 and 15 show bottles similar to that of FIGS. 12 and 13 which were subjected to .[.comparative.]. tests .[.with a conventional one piece blow-moulded bottle as shown in FIG. 16.].. The test procedures and results are detailed below.
Polyethylene phthalate resin (I.V. 0.76, available from ICI Ltd) was injection moulded to form preforms of 36 grams for a 1 liter volume bottle and of 53 grams for a 2 liter volume bottle. The injection moulding machine was model XL225 sold by HUSKY Co with a mould for 32 pieces. The temperature for moulding was about 260° C. to 280° C. 1 liter volume bottles corresponding to the shape shown in FIG. 14 (Example 1) and 2 liter volume bottles corresponding to the shape shown in FIG. 15 (Example 2) were made from the above preforms under the following conditions:
Blow moulding machine: Corpoplast Co B-40
Blow moulding temperature: about 90° C.
Blow moulding pressure: about 40 bar
Ten each of the bottles of Examples 1 and 2 were measured by the following methods. The results are shown as an average of ten bottles in Table 1.
(1) Thickness of the wall
The thickness of the walls of the portions 170 and 171 in FIG. 14 and of the portions 180 and 181 in FIG. 15 was measured by a micrometer after cutting the bottom
In order to know the degree of orientation, the portions or pieces where the wall thickness was measured were subject to measurement of their density by a density-gradient tube.
(3) Internal pressure test
Into the bottles, water was charged in an amount of 1 liter (Example 1) or 2 liters (Example 2) and sodium bicarbonate and citric acid were added in such an amount that the carbonic acid gas volume corresponds to 4 volumes. After the bottles were allowed to stand at 40° C. for 24 hours, the degree of deformation of the bottom of the bottles was determined visually. The standards of the estimation of the deformation were the following A, B, and C:
A: Substantially no deformation
B: Deformation was observed but self-standing ability was kept
C: Significant deformation and impossibility of self standing
(4) Creep test
The same procedures as those of the internal pressure test were repeated, that is, the bottles were charged with water and kept at 4 volumes of the carbonic acid gas volume and allowed to stand at 40° C. for 24 hours. Then, the increased volume of the bottles was determined in percent based on the original volume of the bottles.
2 liter volume bottles .[.having the shape as shown in FIG. 16.]. were commercially obtained and measured by the same methods as those of Examples 1 and 2. The results are shown in Table 1.
TABLE 1______________________________________ .[.Comparative.]. Example 1 Example 2 .[.Example.].______________________________________Weight of bottle 36 53 .[.57.].(g)Volume of bottle 1 2 .[.2.].(l)Wall thickness(mm) (measuredportions)Re-entrant portion 2.00(170) 2.05(180) .[.2.00(190).].Adjacent portion 0.28(171) 1.05(181) .[.2.32(191).].Density at 23° C.,50%.Iadd.relative humidity.Iaddend.(g/cc)Re-entrant portion 1.330.[.(130).]..Iadd.(170).Iaddend. 1.330.[.(140).]..Iadd.(180).Iaddend. .[.1.330(150).].Adjacent portion 1.350.[.(131).]..Iadd.(171).Iaddend. 1.340.[.(141).]..Iadd.(181).Iaddend. .[.1.330(151).].Estimation of A B .[.B.].Internal pressuretestCreep (%) 2.8 3.8 .[.6.0.].______________________________________
As seen in the above, it was found that the bottles of Examples 1 and 2 are not deformed and keep their self-standing ability even under a high internal pressure due to contents such as carbonated drinks. Moreover, .[.in the bottles of Examples 1 and 2, even if the wall thickness of the portions 171 (in FIG. 14) and 181 (in FIG. 15) is smaller than that of the corresponding portion 191 (in FIG. 16) of the bottle of Comparative Example,.]. the bottles of the Examples 1 and 2 have no problem of internal pressure deformation and stress cracking, which allows the bottle weight to be reduced. .[.Further, the creep characteristics are superior in the bottles of Examples 1 and 2 to that of the Comparative Example..].
By controlling the presence of unoriented material in the base structure and the thickness of the walls of the re-entrant portion, the present invention provides a one piece blow-moulded plastic container having materially improved creep and stress cracking properties when compared with existing one piece bottles, so allowing a significant reduction in the weight of the bottle and hence in production costs.
In addition, the preferred embodiment illustrated in FIGS. 12 and 13 provides a wider effective base diameter than existing bottles and is therefore more stable on filling lines during the bottling process. The webs 112 also help to brace the base against deformation and the general shape of the feet 118 is chosen to minimize the effects of the internal pressure exerted thereon. These features provide a base structure which is inherently resistant to deformation and which is further enhanced by the presence of the thickened re-entrant portion 116 as described herein.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3511401 *||Jul 11, 1968||May 12, 1970||Lever Brothers Ltd||Pressure-resistant plastics bottle|
|US3727783 *||Jun 15, 1971||Apr 17, 1973||Du Pont||Noneverting bottom for thermoplastic bottles|
|US3733309 *||Nov 30, 1970||Sep 3, 1985||Title not available|
|US3870181 *||Feb 12, 1973||Mar 11, 1975||Monsanto Co||Molecularly oriented bottle|
|US3881621 *||Jul 2, 1973||May 6, 1975||Continental Can Co||Plastic container with noneverting bottom|
|US3935955 *||Feb 13, 1975||Feb 3, 1976||Continental Can Company, Inc.||Container bottom structure|
|US4231483 *||Oct 31, 1978||Nov 4, 1980||Solvay & Cie.||Hollow article made of an oriented thermoplastic|
|US4247012 *||Aug 13, 1979||Jan 27, 1981||Sewell Plastics, Inc.||Bottom structure for plastic container for pressurized fluids|
|US4249667 *||Oct 25, 1979||Feb 10, 1981||The Continental Group, Inc.||Plastic container with a generally hemispherical bottom wall having hollow legs projecting therefrom|
|US4318489 *||Jul 31, 1980||Mar 9, 1982||Pepsico, Inc.||Plastic bottle|
|US4381061 *||May 26, 1981||Apr 26, 1983||Ball Corporation||Non-paneling container|
|US4467929 *||May 18, 1981||Aug 28, 1984||Plm A.B.||Oriented plastic container|
|US4620639 *||Apr 26, 1983||Nov 4, 1986||Yoshino Kogyosho Co., Ltd.||Synthetic resin thin-walled bottle|
|US4755404 *||Feb 10, 1987||Jul 5, 1988||Continental Pet Technologies, Inc.||Refillable polyester beverage bottle and preform for forming same|
|EP0002082A1 *||Nov 6, 1978||May 30, 1979||SOLVAY & Cie (Société Anonyme)||Hollow body made of oriented thermoplastic material|
|EP0042132A1 *||Jun 9, 1981||Dec 23, 1981||Henkel Kommanditgesellschaft auf Aktien||Parison and forming tool for stretch blow-moulding|
|FR2217219A1 *||Title not available|
|FR2471921A1 *||Title not available|
|GB2067160A *||Title not available|
|WO1986005462A1 *||Mar 21, 1986||Sep 25, 1986||Meri-Mate Limited||Improvements in or relating to plastics containers|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6569376||Apr 13, 2001||May 27, 2003||Schmalbach-Lubeca Ag||Process for improving material thickness distribution within a molded bottle and bottle therefrom|
|US6612451||Apr 17, 2002||Sep 2, 2003||Graham Packaging Company, L.P.||Multi-functional base for a plastic, wide-mouth, blow-molded container|
|US6634517||Sep 17, 2001||Oct 21, 2003||Crown Cork & Seal Technologies Corporation||Base for plastic container|
|US6672470||Mar 25, 2002||Jan 6, 2004||Schmalbach-Lubeca Ag||Process for improving material thickness distribution within a molded bottle and a bottle therefrom|
|US6942116||May 23, 2003||Sep 13, 2005||Amcor Limited||Container base structure responsive to vacuum related forces|
|US7051889 *||Apr 2, 2002||May 30, 2006||Sidel||Thermoplastic container whereof the base comprises a cross-shaped impression|
|US7150372||Apr 28, 2005||Dec 19, 2006||Amcor Limited||Container base structure responsive to vacuum related forces|
|US7451886||Jun 14, 2005||Nov 18, 2008||Amcor Limited||Container base structure responsive to vacuum related forces|
|US7543713||May 24, 2004||Jun 9, 2009||Graham Packaging Company L.P.||Multi-functional base for a plastic, wide-mouth, blow-molded container|
|US7574846||Mar 11, 2005||Aug 18, 2009||Graham Packaging Company, L.P.||Process and device for conveying odd-shaped containers|
|US7717282||May 12, 2006||May 18, 2010||Co2 Pac Limited||Semi-rigid collapsible container|
|US7726106||Jul 30, 2004||Jun 1, 2010||Graham Packaging Co||Container handling system|
|US7735304||Dec 1, 2008||Jun 15, 2010||Graham Packaging Co||Container handling system|
|US7799264||Mar 15, 2006||Sep 21, 2010||Graham Packaging Company, L.P.||Container and method for blowmolding a base in a partial vacuum pressure reduction setup|
|US7900425||Oct 14, 2005||Mar 8, 2011||Graham Packaging Company, L.P.||Method for handling a hot-filled container having a moveable portion to reduce a portion of a vacuum created therein|
|US7926243||Jan 6, 2009||Apr 19, 2011||Graham Packaging Company, L.P.||Method and system for handling containers|
|US7980404||Mar 18, 2009||Jul 19, 2011||Graham Packaging Company, L.P.||Multi-functional base for a plastic, wide-mouth, blow-molded container|
|US8011166||May 15, 2009||Sep 6, 2011||Graham Packaging Company L.P.||System for conveying odd-shaped containers|
|US8017065||Apr 7, 2006||Sep 13, 2011||Graham Packaging Company L.P.||System and method for forming a container having a grip region|
|US8047389||Apr 28, 2006||Nov 1, 2011||Co2 Pac Limited||Semi-rigid collapsible container|
|US8075833||Feb 27, 2006||Dec 13, 2011||Graham Packaging Company L.P.||Method and apparatus for manufacturing blow molded containers|
|US8096098||Jan 2, 2010||Jan 17, 2012||Graham Packaging Company, L.P.||Method and system for handling containers|
|US8127955||Feb 9, 2007||Mar 6, 2012||John Denner||Container structure for removal of vacuum pressure|
|US8152010||Sep 30, 2003||Apr 10, 2012||Co2 Pac Limited||Container structure for removal of vacuum pressure|
|US8162655||Nov 30, 2009||Apr 24, 2012||Graham Packaging Company, L.P.||System and method for forming a container having a grip region|
|US8171701||Apr 15, 2011||May 8, 2012||Graham Packaging Company, L.P.||Method and system for handling containers|
|US8235704||Feb 1, 2010||Aug 7, 2012||Graham Packaging Company, L.P.||Method and apparatus for manufacturing blow molded containers|
|US8276774||Nov 17, 2008||Oct 2, 2012||Amcor Limited||Container base structure responsive to vacuum related forces|
|US8323555||Aug 13, 2010||Dec 4, 2012||Graham Packaging Company L.P.||System and method for forming a container having a grip region|
|US8381496||Oct 14, 2008||Feb 26, 2013||Graham Packaging Company Lp||Method of hot-filling a plastic, wide-mouth, blow-molded container having a multi-functional base|
|US8381940||Apr 28, 2006||Feb 26, 2013||Co2 Pac Limited||Pressure reinforced plastic container having a moveable pressure panel and related method of processing a plastic container|
|US8429880||Apr 19, 2012||Apr 30, 2013||Graham Packaging Company L.P.||System for filling, capping, cooling and handling containers|
|US8485375 *||Dec 10, 2007||Jul 16, 2013||Sa Des Eaux Minerales D'evian Saeme||Plastic bottle with a champagne base and production method thereof|
|US8529975||Oct 14, 2008||Sep 10, 2013||Graham Packaging Company, L.P.||Multi-functional base for a plastic, wide-mouth, blow-molded container|
|US8584879||Feb 9, 2007||Nov 19, 2013||Co2Pac Limited||Plastic container having a deep-set invertible base and related methods|
|US8590729||Mar 27, 2009||Nov 26, 2013||Constar International Llc||Container base having volume absorption panel|
|US8616395||Jul 30, 2010||Dec 31, 2013||Amcor Limited||Hot-fill container having vacuum accommodating base and cylindrical portions|
|US8627944||Jul 23, 2008||Jan 14, 2014||Graham Packaging Company L.P.||System, apparatus, and method for conveying a plurality of containers|
|US8636944||Dec 8, 2008||Jan 28, 2014||Graham Packaging Company L.P.||Method of making plastic container having a deep-inset base|
|US8671653||Feb 28, 2012||Mar 18, 2014||Graham Packaging Company, L.P.||Container handling system|
|US8720163||Sep 19, 2010||May 13, 2014||Co2 Pac Limited||System for processing a pressure reinforced plastic container|
|US8726616||Dec 9, 2010||May 20, 2014||Graham Packaging Company, L.P.||System and method for handling a container with a vacuum panel in the container body|
|US8794462||Feb 1, 2010||Aug 5, 2014||Graham Packaging Company, L.P.||Container and method for blowmolding a base in a partial vacuum pressure reduction setup|
|US8833579||Sep 12, 2012||Sep 16, 2014||Amcor Limited||Container base structure responsive to vacuum related forces|
|US8839972||Oct 2, 2008||Sep 23, 2014||Graham Packaging Company, L.P.||Multi-functional base for a plastic, wide-mouth, blow-molded container|
|US8919587||Oct 3, 2011||Dec 30, 2014||Graham Packaging Company, L.P.||Plastic container with angular vacuum panel and method of same|
|US8962114||Oct 30, 2010||Feb 24, 2015||Graham Packaging Company, L.P.||Compression molded preform for forming invertible base hot-fill container, and systems and methods thereof|
|US9022776||Mar 15, 2013||May 5, 2015||Graham Packaging Company, L.P.||Deep grip mechanism within blow mold hanger and related methods and bottles|
|US9090363||Jan 15, 2009||Jul 28, 2015||Graham Packaging Company, L.P.||Container handling system|
|US9133006||Oct 31, 2010||Sep 15, 2015||Graham Packaging Company, L.P.||Systems, methods, and apparatuses for cooling hot-filled containers|
|US9145223||Mar 5, 2012||Sep 29, 2015||Co2 Pac Limited||Container structure for removal of vacuum pressure|
|US9150320||Aug 15, 2011||Oct 6, 2015||Graham Packaging Company, L.P.||Plastic containers having base configurations with up-stand walls having a plurality of rings, and systems, methods, and base molds thereof|
|US9211968||Apr 9, 2012||Dec 15, 2015||Co2 Pac Limited||Container structure for removal of vacuum pressure|
|US9346212||May 4, 2015||May 24, 2016||Graham Packaging Company, L.P.||Deep grip mechanism within blow mold hanger and related methods and bottles|
|US9387971||Nov 18, 2013||Jul 12, 2016||C02Pac Limited||Plastic container having a deep-set invertible base and related methods|
|US9394072||Nov 5, 2013||Jul 19, 2016||Amcor Limited||Hot-fill container|
|US9522749||Feb 19, 2013||Dec 20, 2016||Graham Packaging Company, L.P.||Method of processing a plastic container including a multi-functional base|
|US9624018||Feb 21, 2014||Apr 18, 2017||Co2 Pac Limited||Container structure for removal of vacuum pressure|
|US20030196926 *||May 23, 2003||Oct 23, 2003||Tobias John W.||Multi-functional base for a plastic, wide-mouth, blow-molded container|
|US20040094502 *||Apr 2, 2002||May 20, 2004||Michel Boukobza||Thermoplastic container whereof the base comprises a cross-shaped impression|
|US20040173565 *||Mar 15, 2004||Sep 9, 2004||Frank Semersky||Pasteurizable wide-mouth container|
|US20040211746 *||May 24, 2004||Oct 28, 2004||Graham Packaging Company, L.P.||Multi-functional base for a plastic, wide-mouth, blow-molded container|
|US20040232103 *||May 23, 2003||Nov 25, 2004||Lisch G. David||Container base structure responsive to vacuum related forces|
|US20050196569 *||Apr 28, 2005||Sep 8, 2005||Lisch G. D.||Container base structure responsive to vacuum related forces|
|US20060006133 *||Jun 14, 2005||Jan 12, 2006||Lisch G D||Container base structure responsive to vacuum related forces|
|US20060138074 *||Sep 30, 2003||Jun 29, 2006||Melrose David M||Container structure for removal of vacuum pressure|
|US20060231985 *||Feb 27, 2006||Oct 19, 2006||Graham Packaging Company, Lp||Method and apparatus for manufacturing blow molded containers|
|US20060243698 *||Apr 28, 2006||Nov 2, 2006||Co2 Pac Limited||Semi-rigid collapsible container|
|US20060255005 *||Apr 28, 2006||Nov 16, 2006||Co2 Pac Limited||Pressure reinforced plastic container and related method of processing a plastic container|
|US20070051073 *||Jul 30, 2004||Mar 8, 2007||Graham Packaging Company, L.P.||Container handling system|
|US20070181403 *||Mar 11, 2005||Aug 9, 2007||Graham Packaging Company, Lp.||Process and device for conveying odd-shaped containers|
|US20070199915 *||Feb 9, 2007||Aug 30, 2007||C02Pac||Container structure for removal of vacuum pressure|
|US20070199916 *||Feb 9, 2007||Aug 30, 2007||Co2Pac||Semi-rigid collapsible container|
|US20070235905 *||Apr 7, 2006||Oct 11, 2007||Graham Packaging Company L.P.||System and method for forming a container having a grip region|
|US20080047964 *||Feb 9, 2007||Feb 28, 2008||C02Pac||Plastic container having a deep-set invertible base and related methods|
|US20090090728 *||Oct 2, 2008||Apr 9, 2009||Greg Trude||Multi-Functional Base for a Plastic, Wide-Mouth, Blow-Molded Container|
|US20090091067 *||Oct 14, 2008||Apr 9, 2009||Greg Trude||Multi-Functional Base for a Plastic, Wide-Mouth, Blow-Molded Container|
|US20090098257 *||Oct 9, 2008||Apr 16, 2009||Flaherty Robert C||Self-venting microwavable packaging film; package using the film; and, methods|
|US20090126323 *||Dec 1, 2008||May 21, 2009||Graham Packaging Company. L.P.||Container Handling System|
|US20090159556 *||Nov 17, 2008||Jun 25, 2009||Amcor Limited||Container base structure responsive to vacuum related forces|
|US20090178996 *||Mar 18, 2009||Jul 16, 2009||Graham Packaging Company, L.P.||Multi-Functional Base for a Plastic, Wide-Mouth, Blow-Molded Container|
|US20090218004 *||May 15, 2009||Sep 3, 2009||Graham Packaging Company, L.P.||Process and a Device for Conveying Odd-Shaped Containers|
|US20090242575 *||Mar 27, 2009||Oct 1, 2009||Satya Kamineni||Container base having volume absorption panel|
|US20100018838 *||Jul 23, 2008||Jan 28, 2010||Kelley Paul V||System, Apparatus, and Method for Conveying a Plurality of Containers|
|US20100032404 *||Dec 10, 2007||Feb 11, 2010||Sa Des Eaux Minerales D'evian Saeme||Plastic bottle with a champagne base and production method thereof|
|US20100074983 *||Nov 30, 2009||Mar 25, 2010||Graham Packaging Company, L.P.||System and Method for Forming a Container Having a Grip Region|
|US20100170199 *||Jan 6, 2009||Jul 8, 2010||Kelley Paul V||Method and System for Handling Containers|
|US20100181704 *||Feb 1, 2010||Jul 22, 2010||Graham Packaging Company, L.P.||Method and Apparatus for Manufacturing Blow Molded Containers|
|US20100301524 *||Aug 13, 2010||Dec 2, 2010||Gregory Trude||System and Method for Forming a Container Having A Grip Region|
|US20110017700 *||Jul 30, 2010||Jan 27, 2011||Patcheak Terry D||Hot-fill container|
|US20110147392 *||Mar 2, 2011||Jun 23, 2011||Greg Trude||Multi-Functional Base for a Plastic, Wide-Mouth, Blow-Molded Container|
|US20110210133 *||Sep 19, 2010||Sep 1, 2011||David Melrose||Pressure reinforced plastic container and related method of processing a plastic container|
|U.S. Classification||215/375, 220/606, 220/608, 215/373|
|International Classification||B65D1/02, B29C49/12|
|Cooperative Classification||B29C49/12, B65D1/0284|
|European Classification||B65D1/02D2E, B29C49/12|
|Oct 16, 1997||AS||Assignment|
Owner name: NORTH AMERICAN CONTAINER, INC., TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORDERNEY INVESTMENTS LIMITED;REEL/FRAME:008753/0805
Effective date: 19971011
|Feb 18, 2004||FPAY||Fee payment|
Year of fee payment: 12
|Feb 18, 2004||SULP||Surcharge for late payment|
|Apr 21, 2004||FPAY||Fee payment|
Year of fee payment: 8
|May 3, 2004||PRDP||Patent reinstated due to the acceptance of a late maintenance fee|
Effective date: 20040504
|Oct 12, 2004||AS||Assignment|
Owner name: NORTH AMERICAN CONTAINER, INC. F/K/A NORTH AMERICA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORTH AMERICAN CONTAINER, INC.;REEL/FRAME:015232/0798
Effective date: 20041007