Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1996-11-18
1999-01-12
Bratlie, Steven A.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 68, 401 98, 401134, 401175, B05C 1700, A45D 4016
Patent
active
058577939
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND
1. Field of the Invention
This invention relates to a refill cartridge for a stick which applies product by rubbing onto a surface, such as an adhesive stick.
2. Discussion of Related Art
Refill cartridges of this type and a corresponding method for filling them are known from applicants' DE 41 20 969 A1 and also from DE 41 16 581 A1. They are particularly suitable for refilling adhesive sticks, but also other sticks which apply product by rubbing onto a surface, such as deodorant sticks, lipsticks, lubricant sticks, shaving soap sticks or crayons. The main advantage of these refill cartridges is that, when the stick is empty, its key non-consumable elements can be repeatedly reused by quasirefilling of the stick with a refill cartridge, for which purpose the initially closed refill cartridge is fitted onto and secured to the stick, the screwthreaded spindle of the stick being introduced into the refill cartridge and screwed into the plunger so that it can then engage in the bore formed over the entire length of the product of the refill cartridge.
Although a refill cartridge of the type in question has considerable advantages, it has been found that the production and filling of such a refill cartridge with initially liquid product involve disadvantages in view of the need to form a bore throughout the product to receive the screwthreaded spindle. Thus, in the method according to DE 41 20 969 A1, the empty refill cartridge closed at its bottom end is initially introduced into a mold in which a pin extending over the mold--for receiving the screwthreaded bore of the plunger and for forming the bore extending throughout the product--is arranged at the bottom of the mold concentrically of its longitudinal axis. The product is then poured in and, after the product has solidified, the pin forming the bore in the product has to be removed. The refill cartridge then has to be tightly closed at both ends to ensure that the product does not come into contact with the surrounding air.
SUMMARY OF THE INVENTION
Accordingly, the problem addressed by the present invention is to enable a refill cartridge of the type in question to be produced and filled more easily and to remain satisfactorily sealed after filling.
In a refill cartridge of the type mentioned at the beginning, the solution provided by one embodiment of the invention includes a tube-like element releasably closed at its free end by a sealingly fitted cap-like closure element, the cap-like closure element being internally formed with a pin-like projection which fills the bore extending throughout the product.
A refill cartridge designed in this way is much easier to make and to fill. Thus, the product may initially be poured in liquid form into the refill cartridge closed at its bottom end, after which the cap-like closure element is sealingly fitted, with the pin-like projection forming the desired bore in the product while it is still in the liquid state. The length of the pin-like projection is such that a bore extending over the entire length of the product is formed. When the refill cartridge is used by the consumer, the cap-like closure element merely has to be removed from the refill cartridge, thus uncovering the bore extending through the solid product.
In one particularly advantageous embodiment, the length of the pin-like projection is such that the free end thereof engages at least locally in the screwthreaded bore of the plunger in the fully fitted state of the cap-like closure element. This ensures that even the screwthreaded bore of the plunger is substantially free from product so that, when the refill cartridge is used, the screwthreaded spindle of the pin can readily be screwed in.
In another particularly advantageous embodiment, the cap-like closure element and/or the outer receiving zone of the tube-like element for the cap-like closure element is/are provided with co-operating, encircling stop means which are designed in such a way that, before the stop means cross over one another, the pin-like projection penetrates ful
REFERENCES:
patent: 1947738 (1934-02-01), Reutter
patent: 2574405 (1951-11-01), Lynn
patent: 4369158 (1983-01-01), Woodruff et al.
Bossert Marie-Claude
Franken Joachim
Lepsius Tilwin
Bratlie Steven A.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Szoke Ernest G.
Watov Kenneth
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