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US20020070191A1 - Neck finish for a container and mold for forming the container - Google Patents

Neck finish for a container and mold for forming the container Download PDF

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Publication number
US20020070191A1
US20020070191A1 US09/440,864 US44086499A US2002070191A1 US 20020070191 A1 US20020070191 A1 US 20020070191A1 US 44086499 A US44086499 A US 44086499A US 2002070191 A1 US2002070191 A1 US 2002070191A1
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United States
Prior art keywords
container
mold
thread
neck
recesses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US09/440,864
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US6386380B1 (en
Inventor
Christopher Clodfelter
Douglas Sprick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Berry Global Inc
Silgan Plastic Food Containers Corp
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to US09/440,864 priority Critical patent/US6386380B1/en
Assigned to REXAM MEDICAL PACKAGING, INC. reassignment REXAM MEDICAL PACKAGING, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CLODFELTER, CHRISTOPHER, SPRICK, DOUGLAS
Priority to US10/125,145 priority patent/US6561369B1/en
Application granted granted Critical
Publication of US6386380B1 publication Critical patent/US6386380B1/en
Publication of US20020070191A1 publication Critical patent/US20020070191A1/en
Assigned to REXAM CLOSURES AND CONTAINERS INC. reassignment REXAM CLOSURES AND CONTAINERS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REXAM MEDICAL PACKAGING INC.
Assigned to REXAM CLOSURES LLC reassignment REXAM CLOSURES LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REXAM CLOSURES AND CONTAINERS, INC.
Assigned to BERRY PLASTICS CORPORATION reassignment BERRY PLASTICS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REXAM CLOSURES LLC
Assigned to CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, BANK OF AMERICA reassignment CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH FIRST LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: AVINTIV SPECIALTY MATERIALS INC., BERRY FILM PRODUCTS COMPANY, INC., BERRY GLOBAL FILMS, LLC, BERRY PLASTICS FILMCO, INC., BPREX HEALTHCARE PACKAGING INC., COVALENCE SPECIALTY ADHESIVES LLC, FIBERWEB, LLC, PLIANT, LLC, PRIME LABEL AND SCREEN INCORPORATED, ROLLPAK CORPORATION
Assigned to U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT reassignment U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT FIRST LIEN PATENT SECURITY AGREEMENT Assignors: AVINTIV SPECIALTY MATERIALS INC., BERRY FILM PRODUCTS COMPANY, INC., BERRY GLOBAL FILMS, LLC, BERRY GLOBAL, INC., BPREX HEALTHCARE PACKAGING INC., FIBERWEB, LLC, PLIANT, LLC, PRIME LABEL & SCREEN INCORPORATED, PRIME LABEL & SCREEN, INC., PROVIDENCIA USA, INC.
Assigned to BANK OF AMERICA, N.A., CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH reassignment BANK OF AMERICA, N.A. FIRST LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: AVINTIV SPECIALTY MATERIALS INC., BERRY FILM PRODUCTS COMPANY, INC., BERRY GLOBAL FILMS, LLC, BERRY PLASTICS FILMCO, INC., BPREX HEALTHCARE PACKAGING INC., COVALENCE SPECIALTY ADHESIVES LLC, FIBERWEB, LLC, PLIANT, LLC, PRIME LABEL AND SCREEN INCORPORATED, ROLLPAK CORPORATION
Anticipated expiration legal-status Critical
Assigned to PROVIDENCIA USA, INC., AVINTIV SPECIALTY MATERIALS, LLC (F/K/A AVINTIV SPECIALTY MATERIALS INC.; F/K/A POLYMER GROUP, INC.), FIBERWEB, LLC., BERRY FILM PRODUCTS COMPANY, INC. reassignment PROVIDENCIA USA, INC. RELEASE OF SECURITY INTEREST Assignors: U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION
Assigned to PRIME LABEL & SCREEN, INC., PLIANT, LLC, PROVIDENCIA USA, INC., BPREX HEALTHCARE PACKAGING INC., AVINTIV SPECIALTY MATERIALS INC., FIBERWEB, LLC, BERRY GLOBAL FILMS, LLC, BERRY FILM PRODUCTS COMPANY, INC., PRIME LABEL & SCREEN INCORPORATED reassignment PRIME LABEL & SCREEN, INC. PARTIAL RELEASE OF SECURITY INTEREST IN PATENTS Assignors: U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION
Assigned to BERRY PLASTICS FILMCO, INC., BERRY FILM PRODUCTS COMPANY, INC., COVALENCE SPECIALTY ADHESIVES LLC, BERRY PLASTICS HOLDING CORPORATION, BERRY PLASTICS CORPORATION, BERRY GLOBAL FILMS, LLC, BPREX HEALTHCARE PACKAGING INC., FIBERWEB, INC., AVINTIV SPECIALTY MATERIALS, LLC (F/K/A AVINTIV SPECIALTY MATERIALS INC.), LETICA CORPORATION, FIBERWEB, LLC, BERRY GLOBAL, INC., F&S Tool, Inc., KERR GROUP, LLC, LETICA RESOURCES, INC., ROLLPAK CORPORATION, PLIANT, LLC reassignment BERRY PLASTICS FILMCO, INC. RELEASE OF PATENT SECURITY INTERESTS Assignors: BANK OF AMERICA, N.A., AS ABL COLLATERAL AGENT, UBS AG, STAMFORD BRANCH (SUCCESSOR TO CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH), AS TERM LOAN COLLATERAL AGENT
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/54—Moulds for undercut articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D1/00—Rigid or semi-rigid containers 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 or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/54—Moulds for undercut articles
    • B29C2049/542—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles
    • B29C2049/543—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles at the neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/54—Moulds for undercut articles
    • B29C2049/542—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles
    • B29C2049/548—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles the movement of the mould parts during opening of the mould are interlinked
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding

Definitions

  • This invention relates to a neck finish on a container having an anti-thread distortion feature and more particularly relates to a neck finish for a container having a clearance designed into a bottle thread to allow horizontal withdrawal of bottle thread molding surfaces during manufacture.
  • an extruded parison or injection molded preform is initially formed.
  • materials such as polyethylene terephthalate (PET) or High Density Polyethylene (HDPE) are most commonly found.
  • PET polyethylene terephthalate
  • HDPE High Density Polyethylene
  • the preform is positioned within a mold cavity which is defined by the coming together of two mold halves and the preform is held in place by the neck finish between the mold halves.
  • the preform is longitudinally stretched, usually by a push rod, and then laterally expanded by injection of a blowing gas or fluid into the interior of the preform.
  • the mold halves Upon completion of the molding process the mold halves are moved apart horizontally and in many instances during the separation of the mold surface, and particularly in the neck finish, the molding surfaces pull, tear, or rip the helically-shaped formed bottle container neck threads.
  • a common problem found in the forming of containers utilizing steep-pitch threads is distortion of the threads upon removal of the container from the mold.
  • a blow molded container is formed from a parison.
  • the neck finish of the container has been modified to assist in the separation of the mold upon the completion of the formation of a container without deforming the container thread profile.
  • the neck finish is provided with a pair of recesses on opposed sides of the neck and also of the mold, each recess being disposed within a thread of the neck and in alignment with the direction of movement of the axially moveable mold sections which make up the container forming mold.
  • the present invention provides a container with a neck portion having a first open end and an opposed second end opening into a body portion of the container.
  • a helical thread of the type such as a steep-pitch helical thread or the like encircles the neck.
  • the helical thread is provided for engagement with mating threads of a closure or container cap.
  • a pair of recesses are provided within the helical thread wherein the recesses are spaced 180° apart.
  • the recesses are formed by fingers in at least two axially movable mold sections. When the mold sections are joined together they form a mold cavity from which the container is formed.
  • FIG. 1 is a perspective view of a neck finish of one preferred embodiment of the present invention
  • FIG. 2 is a side view of the neck finish of FIG. 1;
  • FIG. 3 is a side view of the embodiment of FIG. 1 wherein the container in FIG. 2 has been rotated 90°;
  • FIG. 4 is a top view of the container of FIG. 1.
  • FIG. 5 is a top view of the container of FIG. 1 in a split mold.
  • FIG. 5A is FIG. 5 with the split mold in a separated condition.
  • a container 10 is made up of a neck portion 12 and a body portion 24 .
  • the neck 12 is provided with an open mouth 16 and an opposed opening into the body portion 24 .
  • Circumscribing the neck portion 12 is a helical thread 14 which is defined by a slot 26 which receives the thread of a closure or container cap (not shown).
  • Disposed within the thread 14 is a pair of recesses 20 a and 20 b which are spaced from each other a total of 180°.
  • the recesses 20 a and 20 b are in alignment with and formed by the fingers 32 a, 32 b, 32 c, and 32 d as shown in FIG. 5 a.
  • a latching lug 22 may also be provided for engagement with a mating latching lug on a closure (not shown).
  • a mold 30 of the preferred embodiment is comprised of only two sections which are, in fact, halves. One half is identifiable as 30 a and the other as 30 b. Molds 30 a and 30 b are horizontally movable by virtue of the fact that there are but two sections. When three or more sections are used, the mold sections move apart axially instead of horizontally. When the molds are in a closed position, as shown in FIG. 5, they define a cavity (not shown) for the mold of the body portion 24 of the container 10 and grasp the neck portion 12 therein and form the helical threads 14 . As shown in FIG. 5 a, the recessed portions 20 a and 20 b in the helical thread 14 are formed by the fingers 32 a, 32 b, 32 c and 32 d of the mold halves 30 a and 30 b, respectively.
  • a container 10 with a neck finish 12 of the present invention is formed by placing a parison of a selected moldable material, such as, for example polyethylene terephthalate (PET), or High Density Polyethylene (HDPE), within a cavity of the mold.
  • a parison of a selected moldable material such as, for example polyethylene terephthalate (PET), or High Density Polyethylene (HDPE)
  • PET polyethylene terephthalate
  • HDPE High Density Polyethylene
  • the preferred embodiment also creates the mold cavity upon the bringing together of the mold halves 30 a and 30 b, as shown in FIG. 5.
  • Alternate embodiments using more than two mold sections create a mold cavity when their mold sections are brought together axially.
  • a vertically molded core (not shown) of a molding device is inserted into the cavity thereby engaging with the parison.
  • the parison is next formed into a preselected configuration defined by the spatial relationship of the core and the cavity in the mold 30 resulting in the formation of a container 10 . Additionally, a blow-molding process can be used to create the container 10 .
  • the mold halves 30 a and 30 b are then horizontally separated as the mold halves 30 a and 30 b move horizontally away from the container. Furthermore, at the initial separation of the mold halves, the fingers 32 a, 32 b, 32 c and 32 d form the recesses 20 a and 20 b in the helical thread 14 in order to allow clearance of the mold from the neck finish and avoid distortion of the helical thread 14 , even if the helical threads 14 are of a steep pitch, as the halves 30 a and 30 b separate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A neck finish of a container which includes a helical thread encircling the neck wherein said thread is provided with a pair of recesses spaced apart 180° and in cooperative engagement with recess forming fingers in a pair of cooperating horizontally movable mold halves.

Description

    BACKGROUND OF THE INVENTION
  • This invention relates to a neck finish on a container having an anti-thread distortion feature and more particularly relates to a neck finish for a container having a clearance designed into a bottle thread to allow horizontal withdrawal of bottle thread molding surfaces during manufacture. [0001]
  • Currently, in the forming of containers of plastic, glass, or other known materials, an extruded parison or injection molded preform is initially formed. In the use of plastics, materials such as polyethylene terephthalate (PET) or High Density Polyethylene (HDPE) are most commonly found. In the blow molding process for a container, the preform is positioned within a mold cavity which is defined by the coming together of two mold halves and the preform is held in place by the neck finish between the mold halves. In the molding process the preform is longitudinally stretched, usually by a push rod, and then laterally expanded by injection of a blowing gas or fluid into the interior of the preform. Upon completion of the molding process the mold halves are moved apart horizontally and in many instances during the separation of the mold surface, and particularly in the neck finish, the molding surfaces pull, tear, or rip the helically-shaped formed bottle container neck threads. A common problem found in the forming of containers utilizing steep-pitch threads is distortion of the threads upon removal of the container from the mold. [0002]
    • SUMMARY OF THE INVENTION
  • It is an object of the present invention to provide a neck finish for a bottle container including an anti-thread distortion feature. [0003]
  • It is another object of the present invention to provide a neck finish for a container which includes a clearance designed into a bottle thread to allow horizontal withdrawal of the bottle thread molding surfaces during the molding operation of a container without pulling, tearing, ripping, or otherwise deforming threads on the neck of the container. [0004]
  • It is yet another object of the present invention to provide a neck finish for a container which allows for the use of steep-pitch threads. [0005]
  • In accordance with the present invention, a blow molded container is formed from a parison. The neck finish of the container has been modified to assist in the separation of the mold upon the completion of the formation of a container without deforming the container thread profile. The neck finish is provided with a pair of recesses on opposed sides of the neck and also of the mold, each recess being disposed within a thread of the neck and in alignment with the direction of movement of the axially moveable mold sections which make up the container forming mold. [0006]
  • More particularly, the present invention provides a container with a neck portion having a first open end and an opposed second end opening into a body portion of the container. A helical thread of the type such as a steep-pitch helical thread or the like encircles the neck. The helical thread is provided for engagement with mating threads of a closure or container cap. A pair of recesses are provided within the helical thread wherein the recesses are spaced 180° apart. The recesses are formed by fingers in at least two axially movable mold sections. When the mold sections are joined together they form a mold cavity from which the container is formed.[0007]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • A better understanding of the invention will be had upon reference to the following description in conjunction with the accompanying drawings in which like numerals refer to like parts throughout the several views and wherein: [0008]
  • FIG. 1 is a perspective view of a neck finish of one preferred embodiment of the present invention; [0009]
  • FIG. 2 is a side view of the neck finish of FIG. 1; [0010]
  • FIG. 3 is a side view of the embodiment of FIG. 1 wherein the container in FIG. 2 has been rotated 90°; [0011]
  • FIG. 4 is a top view of the container of FIG. 1. [0012]
  • FIG. 5 is a top view of the container of FIG. 1 in a split mold; and, [0013]
  • FIG. 5A is FIG. 5 with the split mold in a separated condition.[0014]
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • As shown in FIGS. [0015] 1-4, a container 10 is made up of a neck portion 12 and a body portion 24. The neck 12 is provided with an open mouth 16 and an opposed opening into the body portion 24. Circumscribing the neck portion 12 is a helical thread 14 which is defined by a slot 26 which receives the thread of a closure or container cap (not shown). Disposed within the thread 14 is a pair of recesses 20 a and 20 b which are spaced from each other a total of 180°. The recesses 20 a and 20 b are in alignment with and formed by the fingers 32 a, 32 b, 32 c, and 32 d as shown in FIG. 5a. A latching lug 22 may also be provided for engagement with a mating latching lug on a closure (not shown).
  • As shown in FIGS. 5 and 5[0016] a, a mold 30 of the preferred embodiment is comprised of only two sections which are, in fact, halves. One half is identifiable as 30a and the other as 30 b. Molds 30 a and 30 b are horizontally movable by virtue of the fact that there are but two sections. When three or more sections are used, the mold sections move apart axially instead of horizontally. When the molds are in a closed position, as shown in FIG. 5, they define a cavity (not shown) for the mold of the body portion 24 of the container 10 and grasp the neck portion 12 therein and form the helical threads 14. As shown in FIG. 5a, the recessed portions 20 a and 20 b in the helical thread 14 are formed by the fingers 32 a, 32 b, 32 c and 32 d of the mold halves 30 a and 30 b, respectively.
  • In the preferred embodiment, a [0017] container 10 with a neck finish 12 of the present invention is formed by placing a parison of a selected moldable material, such as, for example polyethylene terephthalate (PET), or High Density Polyethylene (HDPE), within a cavity of the mold. The preferred embodiment also creates the mold cavity upon the bringing together of the mold halves 30 a and 30 b, as shown in FIG. 5. Alternate embodiments using more than two mold sections create a mold cavity when their mold sections are brought together axially. A vertically molded core (not shown) of a molding device is inserted into the cavity thereby engaging with the parison.
  • In a form of compression-molding, the parison is next formed into a preselected configuration defined by the spatial relationship of the core and the cavity in the [0018] mold 30 resulting in the formation of a container 10. Additionally, a blow-molding process can be used to create the container 10.
  • After the [0019] container 10 has been formed, the mold halves 30 a and 30 b are then horizontally separated as the mold halves 30 a and 30 b move horizontally away from the container. Furthermore, at the initial separation of the mold halves, the fingers 32 a, 32 b, 32 c and 32 d form the recesses 20 a and 20 b in the helical thread 14 in order to allow clearance of the mold from the neck finish and avoid distortion of the helical thread 14, even if the helical threads 14 are of a steep pitch, as the halves 30 a and 30 b separate.
  • The foregoing detailed description is given primarily for clearness of understanding and no unnecessary limitations are to be understood therefrom for modifications will become obvious to those skilled in the art upon reading this disclosure and may be made without departing from the spirit of the invention and scope of the appended claims. [0020]

Claims (7)

What is claimed is:
1. a container comprising:
a neck portion having a first open end and an opposed second end opening into a body portion of said container;
a helical thread encircling said neck; and,
a pair of recesses in said helical thread, said recesses being spaced 180° apart and in cooperative engagement with fingers in at least a pair of horizontally movable mold sections.
2. The container of claim 1 wherein said helical threads are defined by spaced slots, said slots configured to receive a closure thread of a closure for said container.
3. A container and a mold for the container comprising:
a container comprising a neck portion having a first open end and an opposed second end opening into a body portion of said container, a helical thread encircling said neck of said container, and a pair of recesses in said helical thread, said recesses being spaced 180° apart and in cooperative engagement with fingers in at least a pair of horizontally movable mold sections; and,
a mold having at least a pair of horizontally movable sections engageable to form a container, each of said mold sections having a thread forming portion and at least one finger forming said recesses in said helical thread of said neck portion of said container.
4. The container and mold of claim 3, said helical thread of said container having a steep pitch.
5. The container and mold of claim 3, said mold having a steep-pitch thread forming portion.
6. The container and mold of claim 3, said helical thread of said container having a pitch in the range of 0 to 8 threads per inch.
7. The container and mold of claim 3, said thread forming portion of said mold having a pitch in the range of 0 to 8 threads per inch.
US09/440,864 1999-11-16 1999-11-16 Neck finish for a container and mold for forming the container Expired - Lifetime US6386380B1 (en)

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Application Number Priority Date Filing Date Title
US09/440,864 US6386380B1 (en) 1999-11-16 1999-11-16 Neck finish for a container and mold for forming the container
US10/125,145 US6561369B1 (en) 1999-11-16 2002-04-18 Neck finish for a container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/440,864 US6386380B1 (en) 1999-11-16 1999-11-16 Neck finish for a container and mold for forming the container

Related Child Applications (1)

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US20020070191A1 true US20020070191A1 (en) 2002-06-13

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