US3927795A - Molded article - Google Patents
Molded article Download PDFInfo
- Publication number
- US3927795A US3927795A US339997A US33999773A US3927795A US 3927795 A US3927795 A US 3927795A US 339997 A US339997 A US 339997A US 33999773 A US33999773 A US 33999773A US 3927795 A US3927795 A US 3927795A
- Authority
- US
- United States
- Prior art keywords
- portions
- closure
- mold
- wall portion
- article
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/404—Details of the lines of weakness
Definitions
- ABSTRACT (22] Filed: Mar. 12, 1973 Article having re-entrant portions and molding appa- [21] App]. No.: 339,997
- ratus and method of manufacture thereof enabling removal of the article from an injection mold assembly by first separating the mold portions and then causing relative movement between the article and a re- [52] US. Cl 220/269; 220/270 [51] Int. Cl. B65D 41/32 entrant defining core po o to s n ally release [58] Field of Search 220/48, 27 44 269, 270 the article from contact with all mold portions.
- the 220/265 apparatus includes a core portion assembly and means causing relative movement between a molded article
- the present invention relates generally to merchandise packaging and, more particularly, to improve ments 'in molded articles, molding apparatus, and method of manufacture of such articles.
- the containerclosure combination be sealed in a manner capable of preventingleakage when the seal is subjected to a high pressure differential so as to provide a suitable barrier when vacuum filling and sealing methods of packaging are employed.
- a seal preventing air tightness and/or moisture tightness at relatively low pressure differences is sufficient.
- the closure functions essentially as a cover to avoid spilling of the contents of the container and/or avoid contamination of such contents by foreign material.
- a principal object of the present invention is to pro vide an improved article, apparatus and method embodying the above-noted desirable features.
- this is achievedlby providing a closure member of molded synthetic resinous material shaped to conform with the shape of a' contairier and capable of being sealed thereto.
- the closure them her is provided score lines defining a weakened section and forming margins of a tearable and reclosable lift tab having a portion which carrbe' easily grasped-for easy opening and/or reclosing the tab.
- the closure is manufactured by a method and with apparatus whichutilizes a special core portion of the"apparatus and which involves causing relative movement betweenth'e molded closure and the core portion when th'' mold apparatus is in its open position to permit removal of the closure from the apparatus.
- FIG. 1 is a top plan view of a closure article embodying the present invention
- FIG. 2 is a bottom plan view of the article of FIG. 1;
- FIG. 3 is an enlarged fragmentary sectional view looking in the direction of arrows 3-3 in FIG. 2;
- FIG. 4 is a view illustrating molding apparatus and method in accordance with the invention.
- FIG'. 5 is a view of a modification of the apparatus and method of FIG. 4.
- a closure member em-v bodying the present invention is indicated generally at 10.
- the closure includes a top portion 11 having depending therefrom a marginal skirt 12 having a reversely turned end portion 13 spaced apart from the skirtportion. Additionally, skirt portion 12 may include one or more depending portions 14 projecting inwardly from the skirt.
- a handle-like member 15 is connected to the top portion 11 by a connecting portion 16 and is spaced apart from the top portion to facilitate grasping of the handle member which also may be provided with an opening 17 to further assist grasping of the handle-like member.
- the top portion 11 is provided with one or more score lines 18, 19 which define therebetween a removabletear strip or tab 20 of desired shape.
- tab 20 is shaped-to form a spout-like opening to dispense liquid, powdered, or granular contents enclosed within the container-closure combination.
- the score lines intersect at a comer of the closure top, as shown in FIGS. 1 and 2, and these score lines provide a weakened section in the closure top, as shown in FIG. 3, which can be easily ruptured when the handle-like member-is lifted and pulled upwardly.
- a container not shown, and its contents are enclosed by the closure member with the upper edge of the container received between skirt l2 and the reversely turned portion 13. A suitable seal is effected between the closure and the container walls.
- the handle-like portion When it is decided to remove some of the contents from the container,- the handle-like portion is grasped and lifted upwardly and pulled sufficiently to effect rupture of the: weakened sections along'score lines 18, 19 thus openingthe container and forming 'tabportion 20.
- the contents orsomeporti'on thereof can then be poured through the resulting opening in the closure. top, following which, the container can be reclosed by pushing'the tab portion downwardly and snapping it past projections 14 which serve to maintain the contain'er in a closed condition until the handle-like portion is again lifted with sufficient force. to move the tab past projecting portions 14.
- the apparatus includes first and second mold 'portions21, 22 and an intermediate portion 23. In the closed position of these mold portions, their surfaces define an enclosed mold cavity corresponding to the desired shape'of the-molded article to be produced during the molding operation when molding material is introduced into the mold cavity through an opening 25 provided in the mold portion 22.
- a core or shoe 24 is inserted within the mold cavity and cooperates therewith to form a re-entrant portion of the article to be molded.
- Intermediate portion 23 is fixed to guides 26 which extend through mold portion 21 and are reciprocable relative thereto in the directions indicated by double arrows 27.
- An ejector member 28 similarly extends through mold portion 21 and is reciprocable relative thereto in directions indicated by the double arrows 29.
- the core or shoe is fixed to a rod 30 which also extends through mold portion 21.
- Rod 30 is 3. reciprocable relative to mold portion 21 in the directions indicated by double arrows 31 and is also rotatable relative to mold portion 21 in the directions indicated by double arrows 32.
- mold portions 21, 22, and 23 are shown in the open position of the mold but it is to be understtod that all of these mold portions are movable relative to one another between open and closed positions of the mold apparatus.
- the respective mold portions When it is desired to produce a molded part such as closure 10, the respective mold portions are placed in the closed position of the mold apparatus, following which molding material is introduced into the mold cavity through opening 25. The molding material is introduced into the cavity under pressure and thus flows to all parts of the cavity until the cavity is completely filled. The respective mold portions are maintained in their closed position until the molding material within the mold cavity has cooled and/or set sufficiently for the molded part to retain its shape, following which, the respective mold portions are moved to their open position as illustrated in FIG. 4. At this stage, the molded article has been completely separated from mold portion 21 and is retained within intermediate portion 23.
- the core 24 has been displaced relative to mold portion 21 along with the molded article 10 but otherwise, core 24 remains in the same position relative to the molded article as it occupied when it and the molded article were confined within the mold cavity in the closed position of the mold.
- the core 24 is then rotated relative to the molded article 10 by causing rotation of rod 30 until the core is no longer in contact with re-entrant portion 15.
- the ejector 28 moves to the right in the drawing and pushes the molded article out of the intermediate member 23.
- the respective mold portions can again be moved to the closed position and the apparatus is then ready for the molding of a subsequent article.
- FIG. shows a modification of the embodiment of FIG. 4.
- This modified embodiment also shows the various mold portions in the open position.
- the intermediate mold portion is eliminated and the mold cavity is formed entirely within mold portion 21.
- a mold portion 21a projects partially into the mold cavity to define an opening 17 in the molded part.
- Core 24 is fixed to a rod 3011 similar to rod 30 but difl'ers in that rod 30:] is mounted for reciprocable movement in the direction of double arrows 31 relative to mold portion 21, but is not rotatable relative thereto.
- a second ejector 33 is mounted for reciprocable movement in the direction of double arrows 34.
- a closure having a skirt portion for sealing engagement with a container
- the combination comprismg a wall portion joined to other portions of the closure and defining weakened sections in said wall portion and forming marginal edges of a severable and re-closable spout-like tab including a crisp portion and additionally including a retention tab adjacent said crisp and joined to other portions of the closure, rupture-producing means including a member joined to said wall portion and having a distal end spaced apart from said wall portion and readily graspable by a user, and I stress concentration means adjacent each of said weakened sections and augmenting and transferring force from said rupture-producing means to cause ruptureof said wall portion along said weakened sections and thereby form and open said .tab when a force is applied to said member.
- top portion includes aplurality of marginal portions with adjacent marginal portions intersecting one another.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Closures For Containers (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US339997A US3927795A (en) | 1973-03-12 | 1973-03-12 | Molded article |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US339997A US3927795A (en) | 1973-03-12 | 1973-03-12 | Molded article |
Publications (1)
Publication Number | Publication Date |
---|---|
US3927795A true US3927795A (en) | 1975-12-23 |
Family
ID=23331463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US339997A Expired - Lifetime US3927795A (en) | 1973-03-12 | 1973-03-12 | Molded article |
Country Status (1)
Country | Link |
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US (1) | US3927795A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4256239A (en) * | 1978-10-19 | 1981-03-17 | Tokan Kogyo Kabushiki Kaisha | Easily openable cover member |
US4702387A (en) * | 1986-11-24 | 1987-10-27 | Packaging Resources Inc. | Container and plastic closure therefor |
GB2305415A (en) * | 1995-09-22 | 1997-04-09 | Dolphin Packaging Materials Lt | A container with a tamper-evident, snap-fit lid |
USD742222S1 (en) | 2013-11-27 | 2015-11-03 | Scott P. Liu | Packaging device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3415412A (en) * | 1967-12-06 | 1968-12-10 | Buckeye Molding Co | Severable packaging structure |
US3499572A (en) * | 1968-04-08 | 1970-03-10 | Continental Can Co | Easy-opening structure having a welded weakening line |
US3717279A (en) * | 1972-01-27 | 1973-02-20 | Nat Can Corp | Nondetachable tear strip with wing tab |
-
1973
- 1973-03-12 US US339997A patent/US3927795A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3415412A (en) * | 1967-12-06 | 1968-12-10 | Buckeye Molding Co | Severable packaging structure |
US3499572A (en) * | 1968-04-08 | 1970-03-10 | Continental Can Co | Easy-opening structure having a welded weakening line |
US3717279A (en) * | 1972-01-27 | 1973-02-20 | Nat Can Corp | Nondetachable tear strip with wing tab |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4256239A (en) * | 1978-10-19 | 1981-03-17 | Tokan Kogyo Kabushiki Kaisha | Easily openable cover member |
US4702387A (en) * | 1986-11-24 | 1987-10-27 | Packaging Resources Inc. | Container and plastic closure therefor |
GB2305415A (en) * | 1995-09-22 | 1997-04-09 | Dolphin Packaging Materials Lt | A container with a tamper-evident, snap-fit lid |
GB2305415B (en) * | 1995-09-22 | 1999-01-06 | Dolphin Packaging Materials Lt | Containers |
USD742222S1 (en) | 2013-11-27 | 2015-11-03 | Scott P. Liu | Packaging device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PACKAGING RESOURCES INCORPORATED Free format text: MERGER;ASSIGNOR:BUCKEYE MOLDING COMPANY;REEL/FRAME:004699/0408 Effective date: 19861024 Owner name: PACKAGING RESOURCES INCORPORATED,STATELESS Free format text: MERGER;ASSIGNOR:BUCKEYE MOLDING COMPANY;REEL/FRAME:004699/0408 Effective date: 19861024 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF BOSTON, THE, 100 FEDERAL ST Free format text: SECURITY INTEREST;ASSIGNOR:PACKAGING RESOURCES INCORPORATED, A CORP. OF DE;REEL/FRAME:004759/0230 Effective date: 19870529 Owner name: FIRST NATIONAL BANK OF BOSTON, THE,MASSACHUSETTS Free format text: SECURITY INTEREST;ASSIGNOR:PACKAGING RESOURCES INCORPORATED, A CORP. OF DE;REEL/FRAME:004759/0230 Effective date: 19870529 |
|
AS | Assignment |
Owner name: PACKAGING RESOURCES INCORPORATED, A DE CORP. Free format text: CONDITIONAL ASSIGNMENT;ASSIGNOR:FIRS NATIONAL BANK OF BOSTON, THE;REEL/FRAME:005427/0544 Effective date: 19900814 Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., A DE CORP., Free format text: SECURITY INTEREST;ASSIGNOR:PACKAGING RESOURCES INCORPORATED;REEL/FRAME:005427/0517 Effective date: 19900823 |
|
AS | Assignment |
Owner name: PACKAGING RESOURCES INCORPORATED, ILLINOIS Free format text: ASSIGNMENT FOR RELEASE OF SECURITY;ASSIGNOR:SECURITY PACIFIC BUSINESS CREDIT INC.;REEL/FRAME:006667/0051 Effective date: 19930630 Owner name: UNION BANK OF SWITZERLAND, NEW YORK BRANCH, AS AGE Free format text: ASSIGNMENT FOR SECURITY;ASSIGNOR:PACKAGING RESOURCES INCORPORATED;REEL/FRAME:006667/0075 Effective date: 19930630 |
|
AS | Assignment |
Owner name: PACKAGING RESOURCES INCORPORATED, ILLINOIS Free format text: RELEASE OF SECURITY INTEREST IN, AND MORTGAGE ON PATENTS;ASSIGNOR:UNION BANK OF SWITZERLAND, NEW YORK BRANCH, AS AGENT;REEL/FRAME:008113/0292 Effective date: 19960517 |