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Plastic container or preform

A preform, plastic technology, used in containers, rigid containers, bottles/caps, etc., to solve problems such as unsightly flow, deformation of molded products, etc.

Inactive Publication Date: 2007-01-17
GRAHAM PACKAGING PET TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This flow is unsightly and can cause deformation of the molded part

Method used

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  • Plastic container or preform
  • Plastic container or preform
  • Plastic container or preform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Figure 1-3B A preform assembly 10 according to one embodiment of the invention is shown. Assembly 10 includes a preform 12 and a finish ring 14 fitted thereto.

[0022] The preform 12 includes a body 16 having a closed lower end 18 and an integrally formed neck 20 having an outer flange 22 extending radially outward from an open end thereof. Neck 20 is generally cylindrical in construction, while flange 22 is circumferentially continuous and substantially perpendicular to the central longitudinal axis of preform neck 20 (with figure 1 3-3 lines in to show). Notch groove (or undercut) 24 (see image 3 and Figure 3A ) is formed on the bottom surface 33 of the flange 22, such as by being molded into the flange or formed in the flange in a post-molding manner, thereby creating a top 25 above the groove on the flange 22 and extending downwards Protruding or lower lip23. Such as Figure 3A As best shown in, the groove 24 has a generally radially outwardly facing surf...

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PUM

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Abstract

A finish assembly for a plastic container or preform includes a plastic neck having an open end surrounded by an external flange. The flange has an open axially facing channel adjacent to the outer surface of the neck. A plastic finish ring has an annular body, an inner surface opposed to the outer surface of the neck, an outer surface with at least one external thread, bead or other means for attachment of a closure, and an annular lip extending into the channel. The channel is formed in part by a radially inwardly extending conical surface on the flange, and the lip has a radially outwardly extending conical surface in facing engagement with the radially inwardly facing conical surface on the flange to seal the finish ring against the flange against entry of liquid between the finish ring and the neck.

Description

technical field [0001] The present invention relates to a finish for a plastic container or preform, to a preform assembly for blow molding a plastic container, to a plastic container blow-molded from the preform assembly, and to making said finish, preform Methods of components and containers. Background technique [0002] In the manufacture of plastic containers, it is conventional to injection mold or compression mold to form a preform of the container having a body and a finish with one or more external threads or other cap securing means. The preform finish is usually molded to its final shape, while the preform body is then blow molded into the desired shape of the container body. The preform may be a single layer structure or a multilayer structure in which one or more intermediate layers in the body of the preform may or may not extend into the finish region of the preform. US Patent Nos. 4,609,516, 4,710,118 and 4,954,376 describe injection molding of multilayer c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D41/08B65D1/02B29C49/02B29C49/00B29C49/06
CPCB29B2911/1424B29B2911/14326B29B2911/1442B29B2911/14333B29L2001/00B29B2911/1402B29B2911/14066B29B2911/1412B29K2067/00B29B2911/14053B29B2911/14093B29B2911/14233B29B2911/14213B29B2911/1408B29B2911/1404B29C49/02B29C2049/021B29K2623/086B29B2911/14126B29K2023/06B29B2911/14033B29B2911/14466B29B2911/1458B29B2911/1444B29B2911/14026B29B2911/14226B29L2031/7158B29B2911/1414B29K2023/12B29C49/0073B65D1/0246B29B2911/14106B29B2911/14153B29B2911/14133B29K2105/258B29K2023/086B29C49/06B29B2911/1406B29B2911/14113B29K2995/0067B29B2911/14146Y10T428/1352B29C2949/3009B29C2949/3016B29C2949/302B29C2949/26B29C2949/28B29C2949/24B29C2949/22B29C2949/3008B29C2949/3012B29C2949/3024B29C2949/3026B29C2949/3028B29C2949/303B29C2949/3032B29C2949/3034B29C2949/3036B29C2949/3038B29C2949/3062B29C2949/306B29C2949/3064B29C2949/3056B29C2949/0722B29C2949/072B29C2949/0733B29C2949/0731B29C2949/0724B29C2949/073B29C2949/0777B29C2949/077B29C2949/0773B29C2949/0801B29C2949/08B29C49/071B29C2949/0715
Inventor 托马斯·E·纳希尔
Owner GRAHAM PACKAGING PET TECH