US20020063105A1 - Hollow plastic bottles - Google Patents

Hollow plastic bottles Download PDF

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Publication number
US20020063105A1
US20020063105A1 US09/770,904 US77090401A US2002063105A1 US 20020063105 A1 US20020063105 A1 US 20020063105A1 US 77090401 A US77090401 A US 77090401A US 2002063105 A1 US2002063105 A1 US 2002063105A1
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United States
Prior art keywords
hollow plastic
plastic bottle
rings
base
bottle according
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Granted
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US09/770,904
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US6409035B1 (en
Inventor
Richard Darr
Marc Pedmo
James Dorn
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Plastipak Packaging Inc
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Plastipak Packaging Inc
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Priority to US72403000A priority Critical
Application filed by Plastipak Packaging Inc filed Critical Plastipak Packaging Inc
Priority to US09/770,904 priority patent/US6409035B1/en
Assigned to PLASTIPAK PACKAGING, INC. reassignment PLASTIPAK PACKAGING, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DARR, RICHARD C., DORN, JAMES C., PEDMO, MARC A.
Publication of US20020063105A1 publication Critical patent/US20020063105A1/en
Application granted granted Critical
Publication of US6409035B1 publication Critical patent/US6409035B1/en
Assigned to COMERICA BANK, AS AGENT reassignment COMERICA BANK, AS AGENT AMENDED AND RESTATED SECURITY AGREEMENT Assignors: CLEAN TECH, INC., PLASTIPAK HOLDINGS, INC., PLASTIPAK PACKAGING, INC., TABB REALTY, LLC, WHITELINE EXPRESS, LTD.
Assigned to WELLS FARGO BANK, N.A., AS ADMINISTRATIVE AGENT reassignment WELLS FARGO BANK, N.A., AS ADMINISTRATIVE AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PLASTIPAK PACKAGING, INC.
Assigned to PLASTIPAK PACKAGING, INC., CLEAN TECH, INC., PLASTIPAK HOLDINGS, INC., TABB REALTY, LLC, WHITELINE EXPRESS, LTD. reassignment PLASTIPAK PACKAGING, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: COMERICA BANK, AS AGENT
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261Bottom construction
    • B65D1/0276Bottom construction having a continuous contact surface, e.g. Champagne-type bottom

Abstract

Biaxially oriented, hollow plastic bottle of thermoplastic material having an improved base. The base includes a plurality of circumferential rings occupying substantially the entire space between the central portion of the base and the outer supporting rim of the base. In one embodiment, the rings form substantially uniform, continuous, uninterrupted, circumferential, pyramidal ridges and adjacent depressions. In a further embodiment, some of the rings are interrupted by flat areas.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This application is a Continuation-In-Part of copending U.S. patent application Ser. No. 09/724,030 for HOLLOW PLASTIC BOTTLES, filed Nov. 28, 2000.[0001]
  • BACKGROUND OF THE INVENTION
  • The present invention relates to a hollow plastic bottle with an improved base. [0002]
  • Hollow plastic bottles generally include a recessed or inwardly extending or reentrant base structure. This type of base has been found to have good resistance to deformation, especially deformation caused by the effects of internal pressure. [0003]
  • However, it is desirable to provide a recessed base structure for hollow plastic bottles with improved strength properties. For example, increased strength properties in the recessed base will facilitate use of the container for increased heat applications, as pasteurization. Also, increased strength properties will improve impact strength, minimizing damage when the bottles are accidentally dropped. Further, improved strength properties in the base will help prevent roll-out, i.e., under pressure or heat the plastic bottles tend to rollout or bulge at the base. [0004]
  • It is, therefore, a principal object of the present invention to provide a hollow plastic bottle with an improved base. [0005]
  • It is a further object of the present invention to provide an improved plastic bottle as aforesaid with improved strength properties in the base. [0006]
  • It is a still further object of the present invention to provide an improved plastic bottle as aforesaid which is easy to prepare and which is aesthetically pleasing. [0007]
  • Further objects and advantages of the present invention will appear hereinbelow. [0008]
  • SUMMARY OF THE INVENTION
  • It has now been found that the foregoing objects and advantages are readily obtained in accordance with the present invention. [0009]
  • The hollow plastic bottle of the present invention comprises: a hollow body of thermoplastic material having a generally cylindrical side wall, an upper end with a dispensing opening therein, and a lower supporting base with an inwardly extending central portion thereof, wherein said inwardly extending base includes a continuous outer supporting annular rim for supporting the bottle on a surface, a central portion, and a plurality of substantially uniform, continuous, uninterrupted, circumferential rings occupying substantially the entire space between the central portion and the outer supporting rim, said rings forming substantially continuous, uninterrupted, uniform circumferential, pyramidal ridges and adjacent depressions. The plastic bottle is desirably biaxially oriented and blow molded, and polyethylene terephthalate is a preferred material. [0010]
  • In a preferred embodiment, the hollow plastic bottle of the present invention comprises: a hollow body of thermoplastic material having a generally cylindrical side wall, an upper end with a dispensing opening therein, and a lower supporting base with an inwardly extending central portion having an outside surface thereof; wherein said outside surface of said inwardly extending base includes a continuous outer supporting annular rim for supporting the bottle on a surface; a central portion of said base; wherein the space between the central portion of the base and the outer supporting rim includes a plurality of substantially uniform, continuous, uninterrupted, circumferential rings forming substantially uniform, continuous, uninterrupted, circumferential, pyramidal ridges and adjacent depressions. [0011]
  • Desirably, the space between the central portion of the base and the outer supporting rim includes a plurality of additional substantially uniform, circumferential rings forming circumferential, pyramidal ridges and adjacent depressions, said additional rings having at least one substantially flat area thereon. The flat areas may be one, two or three or more separate flat areas and desirably include one of designations, symbols, at least one number, and at least one letter embossed thereon. The flat areas generally interrupt said additional rings. In the preferred embodiment, the flat areas contact at least three of said additional rings. [0012]
  • The uninterrupted rings and additional rings preferably occupy substantially the entire space between the central portion of the base and the outer rim. In a preferred embodiment, at least two of said uninterrupted rings are provided adjacent the central portion of the base and at least two of said uninterrupted rings are provided adjacent the annular rim, with said additional rings therebetween. [0013]
  • The plastic bottle of the present invention has improved strength properties so that the container may be effectively utilized for increased heat applications, as for example, pasteurization, without adverse effects. In addition, the container of the present invention is less susceptible to rollout or bulging at the base, and has improved impact properties. [0014]
  • Further features and advantages of the present invention will appear hereinbelow. [0015]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention will be more readily understandable from a consideration of the accompanying, illustrative drawings, wherein: [0016]
  • FIG. 1 is a side view of the bottle of the present invention with the base shown in section; [0017]
  • FIG. 2 is a bottom view of the base of the bottle of FIG. 1; [0018]
  • FIG. 3 is a sectional view of a blow mold with the final blow molded bottle of FIG. 1 therein; [0019]
  • FIG. 4 is an enlarged sectional view of the base of the bottle of FIG. 1; [0020]
  • FIG. 5 is an enlarged, perspective view of the base of the bottle of FIG. 1; [0021]
  • FIG. 6 is a bottom view of an alternate embodiment of the bottle of the present invention; [0022]
  • FIG. 7 is an enlarged sectional view of the base of the bottle of FIG. 6; and [0023]
  • FIG. 8 is an enlarged perspective view of the base of the bottle of FIG. 6.[0024]
  • DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
  • Referring specifically to FIG. 1 which shows hollow plastic bottle [0025] 10 of the present, invention, said bottle includes a generally cylindrical side wall 12, an upper end 14 with a dispensing opening 16 therein which is desirably configured to hold a suitable closure (not shown), and a lower supporting base 18 which is shown in section in FIG. 1. The supporting base 18 includes an inwardly extending portion 20 having an outside surface 22 thereof shown in more detail in FIGS. 4 and 5 and which will be discussed in more detail hereinbelow.
  • The particular size, shape and configuration of the bottle is not especially critical and any suitable and desirable bottle configuration may be used. Thus, the configuration shown in the drawings herein represents a preferred embodiment, but others may readily be used. For example, the bottle [0026] 10 of FIG. 1 includes a neck portion 24 of reduced diameter with respect to the side wall between the cylindrical side wall 12 and upper end 14, but the side wall may if desired extend directly to the upper end with only a short, inwardly extending transition portion as is common in for example two liter plastic bottles. Naturally, other suitable configurations may readily be employed, as one or two liter bottles, 16 ounce bottles, 8 ounce bottles, etc.
  • The outside surface [0027] 22 of the inwardly extending portion 20 includes a continuous, outer supporting annular rim 26 for supporting the bottle 10 on a surface. In addition, the lower supporting base includes a central portion or hub 28 with a substantially flat annular portion 30 thereof, and a downwardly extending central, button-like portion 32 thereof, see particularly FIGS. 4 and 5. Still further, the outside surface 22 of the inwardly extending portion 20 includes a plurality of substantially uniform, continuous, uninterrupted, circumferential rings 34 occupying substantially the entire space between the central portion 28 of the base 18 and the outer supporting rim 26. Rings 34 form substantially uniform, continuous, uninterrupted circumferential, pyramidal ridges 36 and adjacent depressions 38 and form a step-like configuration between the outer rim 26 and central portion 28 as clearly shown in FIG. 4. Also, the inside surface 40 of the inwardly extending portion 20 of base 18 desirably includes a substantially smooth inside surface opposed to outside surface 22, also as clearly shown in FIG. 4.
  • The base construction of the present invention as shown in the drawings and described above has been found to be quite advantageous. Thus, this provides considerable increased strength in a critical location. For example, the bottle of the present invention may be effectively used for increased heat applications, is less susceptible to roll-out or bulging at the base, and generally has improved impact properties. Also, the construction is simply and easily prepared and results in an aesthetically pleasing configuration. [0028]
  • A plurality of these rings are provided forming a continuous, step-like configuration. Generally, at least five rings are provided, and preferably from 5 to 10, but the exact number will depend on container size and the specific application. [0029]
  • The container or bottle of the present invention is desirably blow molded and biaxially oriented by injection stretch blow molding, in a blow mold [0030] 42 as shown in FIG. 3 in a conventional manner from an injection molded or compression molded preform with the rings 34 formed from corresponding rings 44 in the blow mold. However, the bottle may readily be prepared by simply injection molding.
  • Preferably, the plastic is polyethylene terephthalate; however, other suitable plastics may be readily used alone or in combination or in a multilayered configuration. For example, polyolefins, polyethylene naphthalate, polyvinyl chloride, and others. [0031]
  • FIGS. [0032] 6-8 show an embodiment of the present invention wherein the base of the bottle includes at least one substantially flat area thereon. In the embodiment of FIGS. 68, the bottle may if desired have the same configuration as hollow plastic bottle 10 shown in FIG. 1, including a generally cylindrical side wall 12, an upper end 14 with a dispensing opening 16 therein which is desirably configured to hold a suitable closure and a lower supporting base 118, the features of which are clearly shown in FIGS. 6-8. As with the embodiment of FIGS. 1-5, the particular size, shape and configuration of the bottle is not especially critical and any suitable and desirable bottle configuration may readily be used.
  • Referring specifically to FIGS. [0033] 6-8, the outside surface 122 of the inwardly extending portion 120 includes a continuous, outer supporting annular rim 126 for supporting the bottle 110 on a surface. In addition, the lower supporting base includes a central portion or hub 128 with a substantially flat annular portion 130 thereof, and a downwardly extending central, button-like portion 132 thereof as clearly shown in FIGS. 7 and 8 and as also characterizing the embodiment of FIGS. 1-5.
  • The outside surface [0034] 122 of the inwardly extending portion 120 includes a plurality of substantially uniform, continuous, uninterrupted, circumferential rings 134 in the space between the central portion 128 of base 118 and the outer supporting rim 126. Specifically, at least two of the uninterrupted rings 134 are provided adjacent central portion 128 and at least two of the uninterrupted rings 134 are provided adjacent annular rim 126. The exact number of uninterrupted rings 134 is not especially critical and will depend on factors such as bottle dimensions and size, number and placement of the substantially flat areas, as will be discussed hereinbelow. The uninterrupted rings 134 form substantially uniform, continuous, uninterrupted, circumferential, pyramidal ridges 136 and adjacent depressions 138 and form a step-like configuration between outer rim 126 and central portion 128 as clearly shown in FIG. 7. Also, the inside surface 140 of the inwardly extending portion 120 of base 118 desirably includes a substantially smooth inside surface opposed to outside surface 122, also as clearly shown in the drawings.
  • In addition to the uninterrupted rings [0035] 134, the outside surface 122 of the inwardly extending portion 120 includes a plurality of additional, substantially uniform circumferential rings 150 forming pyramidal ridges 152 and adjacent depressions 154. The additional rings 150 are interrupted by at least one substantially flat area 156, with three (3) separate flat areas or pads 156 shown in the embodiment of FIGS. 6-8, preferably uniformly spaced around the additional rings as shown. Although three (3) of the flat areas is preferred, the exact number is not especially critical and will depend for example on bottle size and particularly desired results. Also, as shown in FIGS. 6-8, the flat areas preferably contact and interrupt at least three of the additional rings 150. The uninterrupted rings 134 plus the additional rings 150 occupy substantially the entire space between the central portion 128 and outer rim 126.
  • The flat portions desirably include information thereon. For example, one can include the recycle symbol [0036] 158, one can include a number 160 which can show mold number, lot number or desired identification, and one can include a corporate logo designation or letter designation 162.
  • In addition to the advantages of the embodiment of FIGS. [0037] 15, the embodiment of FIGS. 6-8 provide the additional advantages of adding a flux point to relieve internal stress and to aid in preventing roll out, while at the same time providing convenient site for embossing useful information thereon in an unobtrusive manner.
  • It is to be understood that the invention is not limited to the illustrations described and shown herein, which are deemed to be merely illustrative of the best modes of carrying out the invention, and which are susceptible of modification of form, size, arrangement of parts and details of operation. The invention rather is intended to encompass all such modifications which are within its spirit and scope as defined by the claims. [0038]

Claims (16)

What is claimed is:
1. A hollow plastic bottle, which comprises:
a hollow body of thermoplastic material having a generally cylindrical side wall, an upper end with a dispensing opening therein, and a lower supporting base with an inwardly extending central portion having an outside surface thereof;
wherein said outside surface of said inwardly extending base includes a continuous outer supporting annular rim for supporting the bottle on a surface;
a central portion of said base; and
wherein the space between the central portion of the base and the outer supporting rim includes a plurality of substantially uniform, continuous, uninterrupted, circumferential rings forming substantially uniform, continuous, uninterrupted, circumferential, pyramidal ridges and adjacent depressions.
2. A hollow plastic bottle according to claim 1, which is blow molded.
3. A hollow plastic bottle according to claim 1, which is biaxially oriented.
4. A hollow plastic bottle according to claim 1, wherein said plastic is polyethylene terephthalate.
5. A hollow plastic bottle according to claim 1, wherein said inwardly extending central portion of the base includes a substantially smooth inside surface opposed to said outside surface.
6. A hollow plastic bottle according to claim 1, wherein said central portion includes a substantially flat annular portion with a downwardly extending central button-like portion.
7. A hollow plastic bottle according to claim 1, wherein said bottle includes a neck portion of reduced diameter between the upper end and side wall.
8. A hollow plastic bottle according to claim 1, wherein said rings form a step-like configuration.
9. A hollow plastic bottle according to claim 1, wherein said space also includes a plurality of additional substantially uniform, circumferential rings forming pyramidal ridges and adjacent depressions, said additional rings having at least one substantially flat area thereon.
10. A hollow plastic bottle according to claim 9, including three separate flat areas.
11. A hollow plastic according to claim 9, wherein said flat areas contact at least three of said additional rings.
12. A hollow plastic bottle according to claim 9, wherein said uninterrupted rings and additional rings occupy substantially the entire space between the central portion of the base and the outer rim.
13. A hollow plastic bottle according to claim 12, including at least two of said uninterrupted rings adjacent the central portion of the base and at least two of said uninterrupted rings adjacent the annular rim, with said additional rings therebetween.
14. A hollow plastic bottle according to claim 9, wherein said flat areas separately include one of symbols, at least one number, and at least one letter, embossed thereon.
15. A hollow plastic bottle according to claim 9, wherein said flat areas interrupt said additional rings.
16. A hollow plastic bottle according to claim 11, wherein said flat areas are substantially uniformly spaced around said additional rings.
US09/770,904 2000-11-28 2001-01-26 Hollow plastic bottles Active US6409035B1 (en)

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US72403000A true 2000-11-28 2000-11-28
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US09/770,904 US6409035B1 (en) 2000-11-28 2001-01-26 Hollow plastic bottles
MXPA01011564 MXPA01011564A (en) 2000-11-28 2001-11-13 Hollow plastic bottles.
CA 2361902 CA2361902C (en) 2000-11-28 2001-11-13 Hollow plastic bottles
BR8102849U BR8102849Y1 (en) 2000-11-28 2001-11-26 provision applied to the base for bottles with improved concavity.
ARP010105522A AR031891A1 (en) 2000-11-28 2001-11-27 hollow plastic bottles

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US20100301058A1 (en) * 2006-04-07 2010-12-02 Gregory Trude System and Method for Forming a Container Having a Grip Region
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US9022776B2 (en) 2013-03-15 2015-05-05 Graham Packaging Company, L.P. Deep grip mechanism within blow mold hanger and related methods and bottles
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US9751679B2 (en) 2003-05-23 2017-09-05 Amcor Limited Vacuum absorbing bases for hot-fill containers
US20140061211A1 (en) * 2003-05-23 2014-03-06 Amcor Limited Hot-fill container
US9394072B2 (en) * 2003-05-23 2016-07-19 Amcor Limited Hot-fill container
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US8794462B2 (en) 2006-03-15 2014-08-05 Graham Packaging Company, L.P. Container and method for blowmolding a base in a partial vacuum pressure reduction setup
US20100301058A1 (en) * 2006-04-07 2010-12-02 Gregory Trude System and Method for Forming a Container Having a Grip Region
US9707711B2 (en) 2006-04-07 2017-07-18 Graham Packaging Company, L.P. Container having outwardly blown, invertible deep-set grips
US8747727B2 (en) 2006-04-07 2014-06-10 Graham Packaging Company L.P. Method of forming container
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US9302805B2 (en) * 2006-08-08 2016-04-05 Sidel Participations Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom
US8627944B2 (en) 2008-07-23 2014-01-14 Graham Packaging Company L.P. System, apparatus, and method for conveying a plurality of containers
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US6409035B1 (en) 2002-06-25
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CA2361902A1 (en) 2002-05-28
BR8102849U (en) 2002-07-09
MXPA01011564A (en) 2002-06-05
CA2361902C (en) 2005-03-22

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