MYLAR BLENDED PLATE AND PACKAGE
A package that comprises a bottom, a plurality of sidewalls extending away from the bottom defining an open top, each sidewall coupled to the bottom with a bottom-to-sidewall transition. The package may include a plurality of curved corner sidewalls disposed between the sidewalls and coupled to the bottom with a bottom-to-corner transition. The bottom-to-sidewall transition may comprise three sections, wherein a second section is substantially planar or slightly arced and the first and third sections being curved as necessary. The package may also include the bottom-to-corner transition comprising at least three sections, the second section being substantially planar wherein the first and third sections are curved as necessary. The second sections of both transitions may be angularly orientated to the bottom and sidewalls. The package may further include a plurality of transition elements between to couple the bottom-to-corner and bottom-to-side transitions.
Latest Multivac, Inc. Patents:
This application claims the benefit of U.S. Provisional Patent Application No. 61/792,090, filed Mar. 15, 2013, the entire disclosure of which is hereby incorporated by reference.
FIELD OF THE INVENTIONThis present invention relates to a shape of a deep drawn thermoplastic package and a plate for deep drawing the same which improves on the prior art by equalizing the film distribution during the formation process to improve the draw ratio.
BACKGROUND OF THE INVENTIONDeep drawn packaging has become very prevalent throughout the food packaging industries. As shown in
The existing configuration performs well for shallow packaging. However, as the sidewalls are drawn deeper, the currently existing bottom-to-side curved transitions result in a non-uniform distribution of material throughout the package as the sidewalls bear a disproportionate thinning when compared to the bottom or the transition sections. Thus, there is a need in the art for a revised package shape and mold or plate particularly for deep-drawing packages which improve the material distribution throughout the package and thereby increases the overall strength of the package and lessens the risk of tears or ruptures of the packaging at the thinner portions of the packaging.
SUMMARY OF THE INVENTIONThe present application is directed toward a package, primarily for foodstuffs, that comprises a bottom and a plurality of sidewalls extending away from the bottom. The sidewalls may be connected using a plurality of curved corner sidewalls. The sidewalls and corner sidewalls may define an open top. Each sidewall may be coupled to the bottom with a bottom-to-sidewall transition. The plurality of curved corner sidewalls may be disposed between the sidewalls. One embodiment of the present package may include four sidewalls extending way from and substantially perpendicular to the bottom and four curved corner sidewalls disposed between the four sidewalls. The package may be thermoformed and/or deep-drawn and incorporated into a food packaging machine. The package may be of unitary construction.
The transitions between the bottom and the sidewalls may be a bottom-to-sidewall transition that includes at least three sections. The second section may be substantially planar, wherein the first section is a curved transition between the bottom and the second section and a third section may be a curved transition between the second section and one of the sidewalls. The second section of the bottom-to-sidewall transition lies at an angle with respect to the bottom. The angle may be in a range between thirty and sixty degrees and, may more specifically be around forty-five degrees.
The package may also include a bottom-to-corner transition that includes at least three sections. Similarly, the second section may be substantially planar, and the first section may be curved and provides a transition between bottom and second section. The third section may include a surface having at least two curves and provides a transition between second section and one of the curved corner sidewalls.
Embodiments of the present package may further include transition elements to transition between bottom-to-sidewall transition and the bottom-to-corner transition so that the package may be leak-proof or air-proof and of a unitary construction. A first transition element provides a transition between the first section of the bottom-to-sidewall transition and the first section of the bottom-to-corner transition. A second transition element to transition between the second section of the bottom-to-sidewall transition and the second section of the bottom-to-corner transition. The package may also include a segmented transition between the third section of the bottom-to-sidewall transition and the third section of the bottom-to-corner transition. A portion of the segmented transition may be coupled to the second section of the bottom-to-corner transition.
In an alternative embodiment, the package of the present invention may alternatively include the bottom-to-sidewall transition having three sections, wherein the second section is an arc of a first radius. The first section may be a curved transition between the bottom and the second section, and the first section may have a second radius. The third section may be a curved transition between the second section and one of the sidewalls wherein the third section may have a third radius. In one embodiment, the first radius is greater than both the second radius and the third radius.
The present invention may also be directed toward a plate for forming the above package and/or a packaging machine that includes a plate for forming the above package.
Other aspects and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments and the accompanying drawing figures.
The accompanying drawings form a part of the specification and are to be read in conjunction therewith, in which like reference numerals are employed to indicate like or similar parts in the various views.
The following detailed description of the present invention references the accompanying drawing figures that illustrate specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the present invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the spirit and scope of the present invention. The present invention is defined by the appended claims and, therefore, the description is not to be taken in a limiting sense and shall not limit the scope of equivalents to which such claims are entitled.
As shown in
First sidewall 14 includes a top 26, a bottom 28, a first end 30 and a second end 32. Second sidewall 16 includes a top 34, a bottom 36, a first end 38 and a second end 40. Third sidewall 18 includes a top 42, a bottom 44, a first end 46 and a second end 48. Fourth sidewall 20 includes a top 50, a bottom 52, a first end 54 and a second end 56. Package 10 may be any material used in the art for deep-drawing including plastic materials commonly used in the art including, known polymers, polypropylene, polyvinyl, polyester, PET, plastics, and Mylar.
As further shown in
Package 10 of the present invention also includes a multiple step transition from the base to the sidewalls that lowers the draw-ratio of the packages thereby resulting in a more uniform distribution of the packaging material. In essence, one embodiment of package 10 combines a chamfer with two fillet radius transitions to transition from bottom 12 of the package to the sidewalls 14, 16, 18, and 20. Similar transition structure is provided in the corners and by reducing the surface area, it subsequently reduces the amount the film must stretch in the corners and, thereby results in a thicker film. This configuration, however, reduces the total surface area of package 10 when compared to the simple fillet radius transition of the package 400 illustrated in
As shown in
Further, each third section 72a-d respectively includes a top side 90a-d, a bottom side 92a-d, a first side 94a-d and a second side 96a-d. As shown in
Now turning back to
Further, each third section 104a-d respectively includes a curved top side 124a-d, a curved bottom side 126a-d, a first side 128a-d, and a second side 130a-d. As shown in
Second transition elements 142a and 142b respectively include a bottom side 144a and 144b, a first side 146a and 146b, and a second side 148a and 148b, and a top side 150a and 150b. Transition element 142 will generally have a linearly appearing profile, but the element itself will curve from second section 70b to side 122b of second corner section 102b and from second section 70c to side 120b of second corner section 102b. Bottom side 144a and 144b intersect respectively with top side 140a and 140b of first section 132a and 132b as shown in
Package 10 also includes two transition elements to transition from third sections 72b and 72c to third corner section 104b as shown in
Transition element 154a and 154b include a bottom side 164a and 164b, a first side 166a and 166b, a second side 168a and b, and a top side 170a and 170b. Bottom side 164a of transition element 154a intersects second top inclined side 116b of second corner section 102b. Bottom side 164b of transition element 154b intersects first inclined side 114b of second corner section 102b. First side 166a and 166b respectively intersect with second sides 160a and 160b of transition elements 142a and 142b. Second side 168a of transition element 154a intersects with side 130b of third corner section 104b. Second side 168b of transition element 154b intersects with side 128b of third corner section 104b. Top side 170a of transition element 154a intersects with a portion of bottom 36 of sidewall 16 and a portion bottom 124b of corner sidewall 60. Similarly, top side 170b of transition element 154b intersects with a portion of bottom 44 of sidewall 18 and a portion of bottom 124b of corner sidewall 60. The profile of transition elements 154a and 154b have a curved profile and transition elements 152a and 152b have a wedge-like shape to accommodate the differences in the surface planes between the sidewall transitions 66 and the corner transitions 98.
Now turning to
Now turning to
Now that the shape of the package formed by a packaging mold or plate has been described, a person in the art will appreciate forming a mold or a plate which results in a package of the above configuration. The angled and/or substantially planar second sections 70 and 102 of the package of the present disclosure provide an advantage when deep drawing the packaging to distribute material more uniformly throughout the package and, thus, avoiding weak or thin portions of the sidewall.
As is evident from the foregoing description, certain aspects of the present invention are not limited to the particular details of the examples illustrated herein. It is therefore contemplated that other modifications and applications using other similar or related features or techniques will occur to those skilled in the art. It is accordingly intended that all such modifications, variations, and other uses and applications which do not depart from the spirit and scope of the present invention are deemed to be covered by the present invention.
Other aspects, objects, and advantages of the present invention can be obtained from a study of the drawings, the disclosures, and the appended claims.
Claims
1. A package that comprises:
- a bottom;
- a plurality of sidewalls extending away from said bottom defining an open top, each sidewall coupled to said bottom with a bottom-to-sidewall transition;
- a plurality of curved corner sidewalls disposed between said plurality of sidewalls;
- wherein a bottom-to-sidewall transition comprises at least three sections, wherein a second section is substantially planar and a first section is a curved transition between the bottom and the second section and a third section that is a curved transition between the second section and one of the plurality of sidewalls.
2. The package of claim 1 comprising four sidewalls extending substantially perpendicular to said bottom, and four curved corner sidewalls disposed between said four sidewalls.
3. The package of claim 1 wherein said second section of said bottom-to-sidewall transition lies at an angle with respect to said bottom.
4. The package of claim 3 wherein said angle is in a range between thirty and sixty degrees.
5. The package of claim 4 wherein said angle is around forty-five degrees.
6. The package of claim 1 further comprising a bottom-to-corner transition comprising at least three sections, said second section being substantially planar wherein said first section is curved and transitions between bottom and second section, and third section has at least two curves and transitions between second section and curved sidewall.
7. The package of claim 6 further comprising a first transition element to transition between said first section of said bottom-to-sidewall transition and said first section of said bottom-to-corner transition; a second transition element to transition between said second section of said bottom-to-sidewall transition and said second section of said bottom-to-corner transition;
- and an segmented transition between said third section of said bottom-to-sidewall transition and said third section of said bottom-to-corner transition.
8. The package of claim 7 wherein a portion of said segmented transition is coupled to said second section of said bottom-to-corner transition.
9. A plate for forming a package, the package comprising:
- a bottom;
- a plurality of sidewalls extending away from said bottom defining an open top, each sidewall coupled to said bottom with a bottom-to-sidewall transition;
- a plurality of curved corner sidewalls disposed between said plurality of sidewalls;
- wherein a bottom-to-sidewall transition comprises at least three sections, wherein a second section is substantially planar and a first section is a curved transition between the bottom and the second section and a third section that is a curved transition between the second section and one of the plurality of sidewalls.
10. A packaging machine including the plate of claim 9.
11. A package wherein the package comprises:
- a bottom;
- a plurality of sidewalls defining an open top, each sidewall coupled to said bottom with a bottom-to-sidewall transition;
- a plurality of curved corner sidewalls between said plurality of sidewalls;
- wherein the bottom-to-sidewall transition comprises three sections, wherein a second section is an arc of a first radius, wherein a first section is a curved transition between the bottom and the second section, the first section having a second radius, wherein a third section is a curved transition between the second section and one of the plurality of sidewalls, the first section having a third radius, and wherein said first radius is greater than both said second radius and said third radius.
Type: Application
Filed: Mar 14, 2014
Publication Date: Oct 23, 2014
Applicant: Multivac, Inc. (Kansas City, MO)
Inventor: Christian Uebele (Kansas City, MO)
Application Number: 14/213,022
International Classification: B65D 1/26 (20060101); B65D 1/34 (20060101);