US 3666088 A
A liquid container comprising a cup, the contents of which have a more or less low viscous consistency, which is closed by a lid. Radially inwardly of the pouring edge of the cup the lid has a recess which comprises a bottom and an annular side wall, said side wall being spaced from the inside surface of the cup so as to present around a portion of its circumference a slot-like interspace between the inside surface of the cup and the annular side wall. The volume of liquid contained in the cup is such that the liquid, when the cup stands vertical, fills the whole of the cup below the bottom of the recess and fills at least a portion of the slot-like interspace.
Description (OCR text may contain errors)
United States Patent 1151 3,666,088 Wingardh 1 May 30, 1972  LIQUID CONTAINERS 3,054,679 9 1962 Bradford .229 43 ux 2,941,660 6/1960 Tupper ..206/46 R  Invent Um Mmarp, Swede 1125,6112 7/1964 Goodman ..229/l.5 B x  Assignee: Sprinter Pack AB, Laholmsvagen, l-lalmmad, Sweden FOREIGN PATENTS OR APPLICATIONS Filed: y 25 97 1,420 1897 Great Britain ..220/42 B Appl. No.: 40,325
Field of Search ..206/46 L, 46 R; 229/43, 1.5 B; 220/42 B, 90.4; 99/171 B, 171 C References Cited UNITED STATES PATENTS 11/1967 Davis ..220/44RX 10/1962 Pollick ..229/43 Primary Examinerl.eonard Summer Attorney-Ostrolenk, Faber, Gerb & Soffen [5 7] ABSTRACT A liquid container comprising a cup, the contents of which have a more or less low viscous consistency, which is closed by a lid. Radially inwardly of the pouring edge of the cup the lid has a recess which comprises a bottom and an annular side wall, said side wall being spaced from the inside surface of the cup so as to present around a portion of its circumference a slot-like interspace between the inside surface of the cup and the annular side wall. The volume of liquid contained in the cup is such that the liquid, when the cup stands vertical, fills the whole of the cup below the bottom of the recess and fills at least a portion of the slot-like interspace.
3 Claims, 1 Drawing Figure Patented May 30, 1972 flaw/Mn 5,; Vans ,4 fax/m.
LIQUID CONTAINERS The present invention relates to a liquid container comprising a cup containing a more or less low-viscous substance and closed by means of a lid.
The invention primarily relates to containers for beverages, such as fruit juice, so-called still drinks, milk, yoghurt, etc. Beverages of this nature are normally sold in plastic cups which have been sealed with an aluminum foil lid. A serious disadvantage associated with hitherto known containers of the type referred to is that a relatively large volume of air is entrapped between the surface of the beverage and the lid and that this air, together with its content of oxygen, acts detrimentally on the liquid stored in the container. The object of the present invention is to eliminate the aforementioned disadvantage to the greatest possible extent, this being achieved according to the invention by means of a container defined in the appended claims. Because of the narrow radial width of the slot-like interspace between the inside of the lid and the inside of the cup the free surface of the liquid is restricted to a small ring in the upper portion of the slot-like interspace, thereby reducing the risk of oxidizing the liquid to a minimum. Containers manufactured in accordance with the invention are suitably designed to enable them to be nested for packaging purposes and the lid should preferably be capable of being replaced subsequent to consuming a portion of the contents of the cup.
The cup and the lid are both suitably made of a known type of plastic material, such as polystyrene, which can be heat moulded or extruded and which enables the lid to be sealed to the cup as by such welding methods as ultrasound welding, high-frequency welding or friction welding.
A suitable construction of a liquid container according to the present invention is illustrated in enlarged scale and partly in section in the accompanying drawing.
The conical, plastic cup is provided at its pouring edge with a radial, annular lip 1 1.
The plastic lid 12 has a relatively deep recess which forms a flat bottom 13 surrounded by an annular side wall 14. The wall 14 is radially spaced from the inside face of the cup to provide a slot-like interspace 15. The flange forming edge portion 16 of the lid extends over the lip 11 of the cup and is provided with an annular groove, the bottom 17 of which is secured to the lip 11 as by welding. One side 18 of the groove is connected to the upper edge portions of the wall 14 and forms therewith a downwardly open channel 19.
The other side 20 of the groove is connected to the outermost edge portion 21 of the lid, said portion forming an annular flange spaced axially from and above the lip 11 to leave a gap 22 having a width of not less than 2 mm and deep enough to allow the edge of a coin to be inserted, for the purpose of separating the flange 21 and lip 11 by twisting the coin. The strength of the weld at the bottom 17 is such that the weld can be broken by exerting a force which allows the lid to be removed without being damaged.
To enable the lid to be centered with respect to the annular side wall 14 there are suitably provided in said side wall three evenly spaced shoulders 23, which are formed by creating local bulges in the side wall 14. These shoulders also serve to retain the lid in position when it is replaced, subsequent to breaking the weld at 17.
As shown in the FIGURE, the cup is filled with a liquid 24 to such an extent that, when applying the lid, the liquid is pressed up into the slot-like interspace so that its level 25 is situated in the vicinity of the pouring edge of the cup. The free liquid surface is thus reduced to a minimum in relation to the surface which would be obtained if the liquid would not fill the cup up to a level corresponding to the underneath of bottom 13. If desired, the cup can be filled so that the liquid surface 25 is level with the pouring edge of the cup. This is achieved by dispensing to the cup a quantity of liquid which slightly exceeds the amount which the cup is intended to contain. Surplus liquid and air is then displaced when applying the lid. All containers filled in this manner will therefore contain exactly the same quantity of liquid.
As will be seen from the FIGURE, the recess 13 also forms a seating which permits piling of the containers.
Subsequent to removing the lid 12, it can be placed to one side with the bottom 13 turned upwards. Any particles of water adhering to the surface of the lid will then run down around the outside of annular side wall 14 to be collected in the now upwardly open channel 19, thereby preventing in a simple manner liquid from running outside the edge of the lid.
The container of the invention can be used for more or less low viscous products and also such products which are in liquid form when put into the container but which later form more or less solid pastes or the like which should be protected from the harmful effect of air to the highest possible degree before the lid is removed.
What I claim is:
1. A disposable type container structure for liquids of low viscous consistency comprising:
a cup having a tapered side wall configuration of annular cross-section;
the smaller diameter end terminating in a bottom wall joined to said annular side wall;
the larger diameter end having an outwardly extending annular shaped pouring lip;
a lid for sealing the open larger diameter end of said cup;
said lid having a tapered side wall configuration of annular cross-section;
the small diameter end of said lid side wall having a bottom wall integrally joined to said side wall;
the larger diameter end of said lid side wall having an outwardly extending lip;
an inner portion of said lid lip extending below the free end of said lip and resting on said pouring lip to define an annular space between said lips;
the tapers of said cup and said lid being similar whereby the adjacent side wall sections of said cup and said lip are substantially equally spaced from one another to define a narrow slot-like interspace between the inner surface of said cup side wall and the outer surface of said lid side wall;
the spacing between the lip of said cup and said lid side wall and between the bottom end of said lid side wall and said cup side wall being substantially equal;
said cup being filled with said liquid to a level above the bottom wall of said lid so that said liquid fills at least a portion of said slot-like interspace to minimize the exposed area of the top surface of said liquid.
2. A container according to claim 1, characterized in that the annular side wall of said lid is provided on the outer surface thereof with a plurality of radial shoulders adapted to center the lid recess in the container so that the slot-like recess has approximately the same radial width around the circumference of the cup.
3. A container according to claim 1, on which cup lip a corresponding portion of the lid is secured by joining together the mutually abutting surface of the lip and the lid, characterized in that the edge portion of the lid includes a radial edge flange whose radial outermost portion is axially spaced from the lip of the cup at a distance of at least 2 mm therefrom to enable a coin to be inserted between said portion and the lip for the purpose of removing the lid, and that the aforesaid inner portion of the lip of said lid is provided with an annular groove, the bottom of which abuts the lip of the cup and is affixed thereto by means of a weld which can be broken by twisting said coin, one side of the groove merging with the edge flange of the lid and the other side of said groove merging with the upper portion of the side wall of the recess.