Container having a rim or other feature encapsulated by or formed from injection-molded material

Patent metadata

Field	Value
Publication number	US-9555568-B2
Application number	US-201314036427-A
Country	US
Kind code	B2
Filing date	Sep 25, 2013
Priority date	Mar 15, 2002
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A tool and method for forming a container from a construct. The tool comprising a cavity for receiving a construct, a core operatively associated with the cavity and being operable to move into the cavity, an injection cavity for receiving injection-molding material and directing injection-molding material around at least a portion of the perimeter of the construct, and a clamping feature. The clamping feature is operatively connected to at least one of the cavity and the core and is for clamping a peripheral portion of the construct as the core moves into the cavity to form the construct into the container.

First claim

What is claimed is:

1. A method of forming a container from a construct, the method comprising:
obtaining a tool having a cavity, a core, an injection cavity, and a clamping feature operatively connected to at least one of the cavity and the core;
placing a construct between the cavity and the core;
activating the clamping feature by moving at least one of the cavity and the core so that the clamping feature at least partially grips a peripheral portion of the construct; and
moving the core into the cavity to at least partially form the container from the construct, the peripheral portion of the construct remaining gripped by the clamping feature during at least a portion of the moving of the core; and
forming an injection molded feature on the construct by injecting injection-molding material into the injection cavity of the tool, the container comprises a sidewall and a flange extending laterally from the sidewall, and the forming of the injection-molded feature comprises at least partially encapsulating the flange, the injecting of the injection-molding material comprises injecting injection-molding material into an advanced-flow section of the injection cavity and thereafter injecting injection-molding material into a delayed-flow section of the injection cavity, and wherein the advanced flow section is located adjacent the at least one sidewall of the container and the advanced-flow section has a greater cross-sectional area than the delayed-flow section.

2. The method of claim 1 wherein the clamping feature comprises a clamping ring that is moveable relative to the at least one of the cavity and the core and a draw ring operatively associated with the other of the at least one of the cavity and the core, the activating the clamping feature comprises gripping the peripheral portion of the construct between the clamping ring and the draw ring.

3. The method of claim 2 wherein the clamping ring has a clamping surface and the draw ring has a contact surface that is opposite the clamping surface, the gripping the peripheral portion of the construct comprises holding the peripheral portion of the construct there between.

4. The method of claim 1 wherein the core comprises at least one articulated section movably received in the cavity, the method comprises initially gripping a central portion of the construct with the articulated section to hold the construct as the core is further moved into the cavity to at least partially form the construct into the container.

5. The method of claim 1 further comprising fully closing the core and the cavity so that the core is fully inserted into the cavity to form the container from the construct.

6. The method of claim 1 wherein the injection cavity comprises a flange section extending across at least a portion of the advanced-flow section, the flange section receiving the flange of the container formed from the construct.

7. The method of claim 6 wherein the flange section and the advanced-flow section extending around the perimeter of the container formed from the construct.

8. The method of claim 1 wherein the cavity comprises at least one sidewall and a shoulder at the top edge of the at least one sidewall, the shoulder extending around the perimeter of the cavity, the shoulder forms the lowermost portion of the advanced-flow section of the injection-molded cavity.

9. The method of claim 1 wherein the cavity comprises at least three sidewalls and at least two corners, each corner being located between respective adjacent sidewalls of the at least three sidewalls, a shoulder being at the top edge of the at least three sidewalls and the at least two corners and extending around the perimeter of the cavity.

10. The method of claim 1 wherein the construct is a blank.

11. The method of claim 1 wherein the construct is a tray.

Assignees

• Graphic Packaging Int Inc

Inventors

• Middleton Scott W
• Sinclair Mark
• O'Hagan Brian R
• Wnek Patrick H
• Lafferty Terrence P
• Blaas Peter W
• Hjort Kevin J
• Smith Patrick J

Classifications

• B31B50/592

  using punches or dies · CPC title

• B65D5/445

  Reinforcements formed separately from the container · CPC title

• B29C45/14508

  Joining juxtaposed sheet-like articles, e.g. for making trim panels · CPC title

• B29C45/1671

  with an insert · CPC title

• B65D77/2016

  the cover being maintained by projections or recesses on the container · CPC title