Dispensing – With cutter and/or punch – To form dispensing opening in container
Patent
1983-08-09
1985-07-02
Rolla, Joseph J.
Dispensing
With cutter and/or punch
To form dispensing opening in container
222 83, 222137, 222390, 174 84R, 366256, B65D 8300
Patent
active
045262950
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a cartridge for injecting into a hollow body a semi-pasty product, such as a polyurethane foam obtained by mixing two constituents, namely a polyalcohol and an isocyanate.
By semi-pasty product is meant a product the viscosity of which is between 500 and 2,000 centipoise.
The cartridge proposed by the invention is intended, in particular, for injecting polyurethane foam into a sealing and electrically insulating sleeve surrounding the splice which joins electric or electronic cables.
There is known a cartridge for injecting a semi-pasty product obtained by mixing two constituents, comprising two containers, one container being slidably mounted in the other and each container containing one of the aforementioned constituents. One of the containers is separated from the other container by a partition wall.
The other container has a discharge nozzle for connection to the injection orifice of the hollow body. The partition wall of the first container and the discharge nozzle of the second container each have a closure pierceable by a perforating rod mounted axially in the cartridge.
The perforation of these closures enables respectively the passage of the first constituent into the second container and the passage of the resulting mixture through the discharge nozzle of the second container.
Experience has shown that the use of a cartridge of this type presented difficulties in the case of products having a viscosity greater than or equal to 1000 centipoise.
In fact, the injection of such products involves the exertion of considerable efforts to make the first container slide into the second container. It is therefore necessary to limit the dimensions of the cartridges and this requires the use of several cartridges to fill sleeves of large volume.
An object of the present invention is to eliminate these disadvantages by providing a cartridge which is easy to handle and capable of containing a volume of semi-pasty product considerably greater than that contained by conventional cartridges.
The injection cartridge proposed by the invention comprises two containers, one of which is slidably mounted in the other and each of which contains one of the two constituents of the mixture to be made up, one of the containers being separated from the other container by a partition wall, this other container having a discharge nozzle for connection to the injection orifice of the hollow body, the partition wall and the discharge nozzle each having a closure pierceable by a perforating rod mounted axially in the cartridge, to enable respectively the passage of the constituent from the first container into the second container and the passage of the resulting mixture through the discharge nozzle of the second container.
According to the invention, the cartridge is characterised in that the rod has a smooth leading portion and a threaded rear portion, the leading and rear portions being separated by a short threaded intermediate portion of larger diameter than the diameters of said leading and rear portions, that the first container has, in its end opposite to the second container, a threaded opening for receiving said threaded intermediate portion, that the free end of the smooth portion of the rod is threaded, that the discharge nozzle of the second container has an internal thread for receiving the thread provided on the end of this smooth portion, that the length of this smooth portion is greater than the distance between the partition wall and the thread of the first container, and that the threaded portion of the rod has a nut for abutting against the outside of the cartridge on the end of the first container, to push this latter into the second container.
The operation of the cartridge according to the invention as follows: The rod is inserted axially into the threaded opening of the first container. The threaded intermediate portion of the rod is screwed into this opening. During this operation, the end of the rod pierces the closure provided in the partition wall of this container. The
REFERENCES:
patent: 3013697 (1961-12-01), Gill
patent: 4019654 (1977-04-01), Van Manen
patent: 4208133 (1980-06-01), Korte-Jungermann
patent: 4220261 (1980-09-01), White
patent: 4449645 (1984-05-01), Korwin et al.
Morel Andre
Morel Jacques
Etablissements Morelateliers Electromecanique De Favieres
Handren Frederick R.
Rolla Joseph J.
LandOfFree
Cartridge for injecting a semi-pasty product does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cartridge for injecting a semi-pasty product, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cartridge for injecting a semi-pasty product will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-377019