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(11) | EP 0 113 946 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Container with metal skin and method of fabrication |
| (57) A vessel with a metal skin particularly well suited for cosmetic use is provided.
The metal skin covers the shoulder region from the base of the neck over the side
wall and extends inwardly over a substantially planar metal plate adhered to the bottom
of the container. The metal skin is formed into a cup shape and the jar is dropped
in up-side down and crimped over the metal plate on the bottom. Pre-forming the shoulder
region of the metal skin avoids unsightly stress marks in the upper exposed portion
of the container. |
BACKGROUND OF THE INVENTION
[0001] Containers or vessels for storing various types of materials are available in a wide variety of sizes and shapes. Generally, the size, shape and color or label of the container varies with the particular material therein. It is often desirable to place various types of cosmetic materials, such as make-up creams or lotions in more elegant containers than generally available by merely applying a label or other typical indicia to the container. Accordingly, there are available various types of cosmetic materials in containers having metal coverings on the container and closure. While the metal covering may be of any desired color, a gold coloring obtained by anodizing a punched aluminum skin is particularly elegant. However, in the constructions available in the prior art, that portion of the metal skin covering the top curved or shoulder ! region of the container; tends to exhibit stress lines or wrinkles caused by the crimping to follow the container shape.
[0002] In some constructions using a plastic insert the skin is left abutting a lip in order to avoid the wrinkling effect. This is not desirable as it leaves exposed a portion of the inner plastic surface of the container exposed. The plastic inner containers are force- fit into the.metal skin which has been pressed into a cup shape dimensioned to receive the inner container. This procedure of force- fitting a metal skin onto a container cannot be utilized with a glass jar as the dimensions of the jar cannot be controlled sufficiently. For this reason the available glass jars with metal coverings must be crimped about the shoulder region of the jar to hold the metal skin in place.
[0003] In these conventional metal covered glass jars or bottles, the metal covering is a cylindrical capsule or cup having a bottom and a vertically extending side wall dimensioned to receive the jar. While such metal covered containers, including the glass jars provide an elegant appearance, the stress marks in the metal in the shoulder region tend to distract from an otherwise elegant appearance. Accordinlgy, it would be desirable to provide a container with a metal skin or covering which avoids the stress marks in the region of the shoulder found in conventional constructions. It would be further desirable to provide a method of fabricating such a container particularly well suited for use with a glass jar having a metal skin which does not form stress marks and does not add significantly to production costs.
SUMMARY OF THE-INVENTION
[0004] A container having a metal skin, wherein the metal skin extends over the side walls and top of the container so that no portion of the container is exposed when a closure is secured, is provided. The container is a vessel having a bottom, a substantially vertical side wall and an inwardly extending top section or shoulder. A neck portion may extend from 'the shoulder of the container for receiving a closure for closing the container. The metal skin covers the exposed surface area of the container for providing a particularly elegant container paticularly well suited for cosmetic formulations.
[0005] .The metal skin on the container is a two piece construction. A first substantially planar metal plate is secured to the bottom of the container and extends to the bottom of the side wall. The second piece is a shell portion formed with a curved inwardly facing flange and opening to conform to the opening in the container. The bottom of the shell portion is crimped to overlap the edge of the metal plate. By forming the shoulder portion of the metal shell with the curved flange, crimping in an exposed region can be avoided. During assembly the container is inserted into the previously curved metal shell in an up-side down manner and the bottom open edge of the metal shell is crimped over the metal plate on the bottom of the container. Thus, stress marks, if any, occur at the base of the container and not at the more visible shoulder region.
[0006] Accordingly, it is an object of the invention to provide an improved container having a metal skin.
[0007] It is another object of the invention to provide an improved process for fabricating a container having a metal skin.
[0008] It is a further object of the invention to provide an improved cylindrical container having an inwardly extending shoulder region and threaded neck portion without stress marks in the metal skin in the shoulder region.
[0009] Still another object of the invention is to provide' a cosmetic container having a metal skin wherein no portion of the surface of the container is exposed when a closure is secured onto the container.
[0010] Still a further object of the invention is to provide an apparatus for assembling the container having a metal skin in accordance with the invention.
[0011] Still other objects and advantages of the invention will in part be obvious and will in part be apparent from the specification.
[0012] The invention accordingly comprises the several steps and the relation of one or more of such steps with respect to each of the others, and the article possessing the features, properties, and the relation of elements which are exemplified in the following detailed disclosure, and the scope of the invention will be indicated in the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] For a fuller understanding of the invention, reference is had to the following description taken in connection with the accompanying drawings, in which:
FIG. 1 is an exploded view of the elements of a container having a metal skin constructed and arranged in accordance with the invention;
FIG. 2 is a perspective view of a container and cap having a metal skin constructed and arranged in accordance with the invention;
FIG. 3 is a partial cross-sectional view of a jar having a metal skin constructed and arranged in accordance with a first embodiment of the invention;
FIG. 4 is a partical cross-sectional view of a jar having a metal skin constructed and arranged in accordance with a further embodiment of the invention; and
FIG. 5 is a cross-sectional view of an apparatus utilized to apply the metal skin to a jar in accordance with the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0014] Fig. 1 illustrates the embodiment of a container having a metal skin constructed and arranged in accordance with the invention. The metal covered container, shown in perspective in Fig. 2 includes a substantially cylindrical jar 10, a closure cap 11, a metal shell section 12, a metal bottom plate 13-and an adhesive pad 14. Pad 14 is utilized to mount bottom plate 13 onto jar 1C, absorbs shock and takes up any space between jar 10 and metal shell 12 due to the tolerance of molding glass jar 10. As shown in Fig. 2, when a jar having a metal skin is assembled in accordance with the invention, the metal skin covers the full height of jar 10 and extends under cap 11 when the container is closed.
[0015] Jar 10 in this illustrated embodiment is a cylindrical glass jar having a base 21, a substantially vertical side wall 22 extending from base 21 to form a substantially cylidrical cavity for holding a cosmetic material 23. Side wall 22 extends to a shoulder portion 24 which includes a flange 26 which extends inwardly to a vertically extending neck 27 having a thread 28 thereon. Cap 11 also has a metal skin 15 and is formed with an internal thread 17 for cooperating with thread 28 for coupling cap 11 to jar 10.
[0016] The metal skin covering jar 10 is in two sections. The first section is cylindrical shell section 12 which has a substantially cylindrical side wall 31 terminating at one end with a curved shoulder region 32 having an internally extending flange 33 and a central opening 34. The opposite end'of side wall 32 of shell section 31 terminates in an open edge 36. Cylindrical metal shell section 12 is dimensioned to fit snuggly over jar 10 with opening 34 dimensioned to allow neck portion 27 to pass therethrough. The interior surface of inwardly extending flange 33 of metal shell section 12 abuts neck 27 of jar 10 as shown in the upper segment of Fig. 3. By extending flange 33 to neck 27, no surface of jar 10 will be exposed when cap 11 is secured to jar 10.
[0017] Metal bottom plate 13 is secured to bottom wall 21 of jar 10 by adhesive pad 14 which has adhesive on both sides. In the embodiment illustrated in Fig. 1, pl-ate 13 includes a circular downwardly extending trough 41 which extends away from the bottom of jar 10 and provides a convenient base for supporting jar 10. Trough 41 includes an outer wall 42 which extends above the surface of plate 13 and includes an outermost lip 43 which is overlapped by shell section 31 as will be described in more detail below.
[0018] The metal skin may be of any material which can be formed into the desired shapes. The metal may be aluminum, brass, copper, silver, gold and the like. Preferably, the metal is aluminum or brass which, are generally used in the cosmetics industry.
[0019] Metal plate 13 and shell section 12 are formed by conventional cold forming metal-working procedures. A circular piece of metal is cut from a sheet and impacted to form plate 13. Shell section 12 is formed by using a series of dies of varying shapes until the desired cup shape with curved shoulder region 32 is formed. When shell section 12 is formed opening 34 is cut out. The edges are finished and the outer surfaces of plate 13 and shell section 12 are anodized to provide the desired finish. At this time a label may be formed on the surface by use of a mask, if desired.
[0020] When assembling a jar covered with a metal skin in accordance with the invention, metal shell section 12 is supported in an inverted position in a holding fixture 51 having an internal cavity 52 and a neck opening 53 with a resilent protective collar 54 to avoid damage to thread 28. Jar 10 is turned up-side down and neck portion 27 is inserted into holding fixture-51 and through opening 34 in metal shell section 12. Shoulder region 24 of jar 10 abuts the inner surface of shoulder region 32 of metal shell 12. The diameter of metal shell section 12 is dimensioned to receive jar 10 snuggly, but due to glass tolerances an adhesive 59 may be disposed between side wall 22 of jar 10 and side wall 31 of shell section 12. Jar 10 is centered in holding fixture 51 by a centering piece 56 which a projection 57 which is displaced towards jar 10 and engages the interior of neck 27 to center jar 10. Bottom plate 13 may be mounted to the bottom of jar 10 by adhesive pad 14 before or after jar 10 is inserted in shell section 12.
[0021] At this time, open edge 34 of shell 12 is then crimped to overlap and engage lip 43 of plate 13 by a crimping tool 58 having a preselected crimping surface 61 which is displaced towards the bottom of jar 10 as shown in Fig. 3. In the alternative embodiment illustrated in Fig. 4, a lip 43' of a bottom plate 13' is positioned abuting the edge of a jar 10' at the junction between a side wall 22' and a bottom wall 21'. This apparatus provides a convenient means to crimp side wall.31 the desired degree to cover bottom plate 13 and avoid forming any significant stress marks.
[0022] By providing the metal skin for jar 10 in two sections, namely bottom plate 13 and shell section 31 having curved shoulder region 32, unsightly stress marks or wrinkles in shoulder region 32 are avoided. Prior constructions utilizing a metal capsule or cup which is turned inwardly at the shoulder of the vessel tend to form extensive stress marks. Such constructions are usually done by hand to avoid working with a die in the region of the neck to avoid damage thereto.
[0023] Open edge 36 of shell section 12 is crimped towards side wall 22 of jar 10 an angle which is substantially less than the 90° curve formed at shoulder region 32. In the embodiments illustrated open edge 36 is curved between about 20 and 60 degrees and avoids formation of any significant stress marks. A sharp right angle curve is provided in metal shell 12 at shoulder region 32 but this is formed by impact forming prior to anodizing the metal and avoids formation of the stress marks.
[0024] The container has been shown as a cylindrical jar 10. However, it is contemplated that a vessel having a square, oval or irregular section may also be covered by a metal skin in accordance with the invention.
[0025] It will thus be seen that the objects set forth above, among those made apparent from the preceding description are efficiently attained and, since certain changes may be made in carrying out the above method and in the article set forth without departing from the spirit and scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
1. A container having a metal skin e.g. of aluminium, brass, copper, silver or gold,
comprising:
a vessel having a bottom and a side wall extending from the bottom, the top of the side wall terminating with an inwardly extending shoulder to define an interior space, the shoulder having an opening to provide access to the interior space;
a metal plate secured to the bottom of the vessel; and
a metal shell covering the side wall and formed with an inwardly extending flange covering the shoulder of the vessel from the opening, the side wall and at the bottom curved inwardly to overlap the metal plate on the bottom of the vessel.
2. A container according to claim 1, further including a neck extending from the shoulder
and the flange of the metal shell extending to the base of the neck and e.g. having
a thread on the neck for coupling with a closure.
3. A container according to claim 2, further including a closure cap having an internal
thread for cooperating with the threaded neck of the vessel for coupling the cap and
the vessel, at least a portion of the inwardly extending flange of the metal shell
covered by the cap when the cap is secured to the vessel.
4. A container according to any of the preceding claims, further including a resilient
pad with adhesive on both surfaces disposed between the bottom of the vessel and the
metal plate for securing the plate to the vessel.
5. A container according to any of the preceding claims wherein the metal plate includes
an upwardly extending outer lip, the side wall of the metal shell being deflected
to overlap the outer lip of the metal plate and wherein the outer lip of the plate
abuts the vessel and the metal plate is formed with a downwardly projecting circular
trough.
6. A container according to any of the preceding claims further including a closure
cap having an internal thread for cooperating with the threaded neck of the vessel
for coupling the cap and the vessel, at least a portion of the inwardly extending
flange of the metal shell covered by the cap when the cap is secured to the vessel.
7. A glass jar having a metal skin e.g. of anodized aluminium comprising:
a substantial cylindrical glass jar having a bottom and side wall extending from the bottom, the top of the side wall terminating in an inwardly curved shoulder region with a circular opening, a neck extending axially from the shoulder with an opening therethrough to provide access to the jar;
a substantially planar metal plate secured to the bottom of the jar; and
a metal shell covering the side wall of the jar and formed with an inwardly extending flange having a central opening dimensioned to receive the neck, the metal shell covering the jar from the base of the neck, the side wall and at the bottom curved inwardly to overlap the metal plate on the bottom of the vessel.
8. A glass jar according to claim 7, further including a closure cap with internal
coupling means for cooperating with the neck of the jar for coupling the cap thereto,
at least a portion of the inwardly extending flange of the metal shell covered by
the cap when secured to the jar.
9. A method of forming a container having a metal skin including a vessel having a
bottom, a side wall extending vertically from the bottom, and an inwardly extending
shoulder region at the top of the side wall extending inwardly to an opening for providing
access to the vessel, comprising:
forming a metal shell having an elongated side wall and inwardly curved shoulder region for covering the shoulder region and side wall of the vessel, the metal shell having an opening dimensioned to cooperate with the.opening in the vessel;
adhering a substantially planar metal plate to the bottom of the vessel;
placing the shoulder region of the vessel into the metal shell with the shoulder of the vessel abutting the inwardly curved region of the metal shell; and
crimping the side wall of the metal skin to overlap the substantially planar metal skin on the bottom of the vessel.
10. An apparatus for forming a container having a metal skin including a vessel having
a bottom wall, a side wall extending vertically from the bottom, an inwardly extending
shoulder region at the top of the side wall extending inwardly to an opening for providing
access to the vessel, comprising:
a holding member formed with a cavity for receiving a metal shell having an elongated side wall and curved shoulder region with a central opening; and
a crimping tool adapted to be displaced from a first non-operative position away from the holding member providing access to the cavity in the holding member and a second operative position towards the holding member for curving a metal shell extending from the cavity towards the crimping tool.
11. An apparatus according to claim 10, further including a centering piece formed
with a projection adapted to enter the cavity in the-holding fixture opposite the
crimping tool for centering a vessel placed within the cavity prior to displacing
the crimping tool to its second position.
12. A method for forming a container having a metal skin on a vessel having a bottom,
a side wall extending vertically from the bottom and an inwardly extending shoulder
region at the top of the side wall extending inwardly to an opening for providing
the access to the vessel, comprising:
placing a metal shell having an elongated side wall and curved shoulder region and central opening in a holding member;
inserting a vessel into the metal shell to abut the curved shoulder region of the metal shell;
placing a substantially planar metal plate on the bottom of the vessel;
crimping the bottom edge of the metal shell about the metal plate by a crimping tool displaced towards the metal shell and bottom plate.