Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Injection-molded plastic container with improved stacking strength

Inactive Publication Date: 2007-01-25
A 1 TOOL CORP
View PDF11 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] The present inventor has recognized that relatively shallow buttresses may be molded to the sidewalls of a plastic container to substantially increase the stacking strength of the container for a given average wall thickness. The buttresses can thereby maintain stacking strength while allowing a reduction of the material needed to manufacture the container. Further, the buttresses appear to improve the flow of plastic into the mold, reducing the amount of injection pressure required for molding of thin wall sections reducing or avoiding distortion, and blemishes caused by high pressures.

Problems solved by technology

Second, the sidewalls must be thick enough to allow practical injection molding.
High injection pressures are necessary to force thermoplastic into thin wall sections of large molds, necessitating more expensive injection molding equipment.
High pressure injection of thin wall sections may result in substantial distortion of the wall as it cools, causing unacceptable warping in the container, cosmetic blemishes, or surface irregularities that interfere with the printing of a label on the outside of the container

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Injection-molded plastic container with improved stacking strength
  • Injection-molded plastic container with improved stacking strength
  • Injection-molded plastic container with improved stacking strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] Referring now to FIG. 1, a container 10 of the present invention may provide a generally planar base 12 forming the bottom of the container 10. Attached at the periphery of the base 12 are upwardly extending sidewalls 18. The sidewalls 18 terminate at an upper rim 20 and may be sealed by attachment of a lid 24 to the upper rim 20 of the sidewall 18 to enclose a container volume 22. Each of the base 12, sidewalls 18 and lid 24 may be injection molded of a thermoplastic material such as a high density polyethylene, or polypropylene, or copolymers although other polyolefins may be used.

[0047] An outer surface 19 of the sidewalls has a smooth circular cross-section that may be contact printed, for example, using transfer or silkscreen printing with information 21 for the consumer. Rims and flanges 23 may be formed in the outer surface 19 to provide attachment points for the lid 24 and supports for handles (not shown) and the like.

[0048] When filled with a product (not shown) an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Fractionaaaaaaaaaa
Fractionaaaaaaaaaa
Volumeaaaaaaaaaa
Login to View More

Abstract

A thermoplastic, injection-molded container provides stacking strength with reduced thickness walls by the addition of a series of shallow, spaced vertical buttresses integrally molded into the container sidewalls.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] - STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002] - BACKGROUND OF THE INVENTION [0003] The present invention relates to injection-molded plastic containers and in particular to a container design and method of manufacture providing improved stacking strength with reduced material requirements. [0004] Injection-molded plastic containers are used for packaging and shipping a wide variety of products. Such containers normally have a lid that may snap into place over the container opening to seal product within the container. With the exception of some smaller containers intended for paint, it is generally desirable that the containers, when empty, nest within each other to minimize space during the shipment and storage of the empty containers. [0005] Containers for product packaging must be produced at a low cost consistent with the container being disposed of when the contents of the container have been consumed. One...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B65D90/02
CPCB29C45/37B65D21/0233B65D1/265
Inventor ARCINIEGAS M., ALFONSO N.
Owner A 1 TOOL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com