US3007621A

US3007621A - Disposable refill cartridge-tube for reloading grease dispensing guns

Info

Publication number: US3007621A
Application number: US746354A
Authority: US
Inventors: Jerome J Galbierz
Original assignee: RC Can Co
Current assignee: RC Can Co
Priority date: 1958-07-03
Filing date: 1958-07-03
Publication date: 1961-11-07
Anticipated expiration: 1978-11-07

Description

NOV. 1961 J. J. GALBIERZ 3,007,621

DISPOSABLE REFILL CARTRIDGE-TUBE FOR RELOADING GREASE DISPENSING GUNS Filed July 3, 1958 2 Sheets-Sheet 1 INVENTOR. JEROME J. GALBIERZ ATTORNEY Nov. 7, 1961 J. J. GALBIERZ 3,007,521

DISPOSABLE REFILL CARTRIDGE-TUBE FOR RELOADING GREASE DISPENSING GUNS 2 Sheets-Sheet 2 Filed July 3;, 1958 FIG-.6.

FIG.5.

INVENTOR. JEROME J. GALBIERZ ATTORNEY United States Patent 3,007,621 DISPOSABLE REFILL CARTRIDGE-TUBE FOR RELOADING GREASE DISPENSING GUNS Jerome J. Galbierz, Glendale, Mo., assignor to R. C. Can Company, Overland, Mo., a corporation of Missouri Filed July 3, 1958, Ser. No. 746,354 3 Claims. (Cl. 229-5.6)

This invention relates to a disposable type of tube-like caitridge container for grease or the like for reloading a mechanical or hand type of grease dispensing gun and more specifically to a container cartridge with a tube-like body and leak proof end closures. One of the closures is permanently attached to the tube-like body and provided with means for ready access to the contents of the container which means includes a seal which allows no seepage until fracture. The other end closure can be any type but is preferably a slip type cap.

Usually cartridges are stored for some time before use or purchase and heretofore under unfavorable conditions where there is dampness, moisture and heat, the lubricant in the cartridge would seep past the friction plug type closure currently in use and the product became unsalable because the appearance indicated possible contamina' tion to the consumer. These cartridges were then returned for refund, and represented a substantial loss to the packager.

The closure and container must be leakproof under any condition and at the same time readily opened.

According to this invention, the cartridge is constructed of a spirally wound tube formed of layers. of paper or paper and metal foil, some of which layers are impervious to the seepage of oil. Usually the tube has a waxed paper or aluminum foil liner, and usually metal foil label suitable to receive printed indicia.

Each end of the tube is closed by a cap, must be readily removable for reasons which will later appear. Heretofore, both have usually been removable. In this construction, only one is readily removable, which may be termed the top end closure. The other, termed one of which for convenience the bottom end closure, on the other hand, is permanently fixed to the cartridge and con- .structed from a centrally apertured metal cap, faced with a flexible composite sheet of sealing material sealed to the metal surrounding the aperture, and coextensive with the inside of the cap surface. This cap is crimped onto the end of the cartridge so as to be nonremovable. The crimping operation seals the cartridge end by pressing the sheet on the cap on to the container liner. This avoids objectionable seepage. It also provides easy opening for discharging of the contents, when desired, by fracture of the portion of the seal exposed by the aperture in the end cap.

The accompanying drawings are illustrative of one form of the invention and, when taken with the detailed description herein, illustrate the best mode now contemplated for carrying the invention into practice.

According to the drawings:

FIG. 1 is a side view of a grease construction,

FIG. 2 is a side view in perspective illustrating the complete refill cartridge,

FIG. 3 is a side view in perspective illustrating the refill cartridge with the top cap removed,

FIG. 4 is an end view of the non-removable cap on the refill cartridge,

FIG. 5 is a very much enlarged vertical sectional view of the cap and liner of sheet material before assembly with one another and the cartridge,

FIG. 6 is a vertical section, very much enlarged, illustrating the cap assembled to the cartridge, and,

gun of conventional ice FIG. 7 is a side view in perspective showing the seal broken.

In FIG. 1 is illustrated a grease gun of conventional construction. The gun has a barrel 1 closed at one end by a cap 2 mounting the pump 3 and its actuating linkage 4 and handle 5. Cap 2 has a dispensing fitting 6 to which may be attached any one of a number of adapters of different length and different shape, all for convenience in reaching the grease fittings of the machinery.

On the opposite end of the gun is a removable cap 7 which in turn mounts a plunger 8 and an actuating handle 9. On the end of the plunger 8 is a piston and a spring for forcing the piston inwardly of the gun, neither of which is shown.

The refill cartridge shown in FIG. 2 has a body 10, usually formed of a plurality of layers of spirally wound paper and foil, etc., all for the purpose of containing the lubricant. The outside of the refill cartridge 10 is dimensioned to readily slide into the gun barrel 1 after the cap 7 has been removed. The upper end of the body 10 of the cartridge is sealed by a removable cap 11, the construction of which may be from metal or a suitable plastic such as described in a prior application by Vincent G. Biedenstein, Serial No. 620,887, filed November 7, 1956, for Slip Cover and Plunger for Cartridge Container.

The container 10 is usually stored with the cap 11 up so as to prevent seepage at the joint between the cap and the body of the cartridge.

The lower end of the cartridge 10 is sealed by an end closure 12, all in 'a manner hereinafter described.

FIG. 3 illustrates the cartridge without the closure 11, ready for loading in the gun shown in FIG. 1. The enclosure 12, as shown in FIG. 4, is apertured at 13 to expose a frangible seal which may be suitably scored for rupture by any sharp instrument.

Operation After the end cap 7 of the grease gun shown in FIG. 1 is removed, the plunger 9 is pulled out as far as possible with respect to the cap 7, and locked. End closure 11 is then removed or fractured as described in the prior application of Biedenstein. Seal 14 is ruptured as shown in FIG. 7. Cartridge 10 is inserted in the gun barrel 1 in the direction illustrated in the drawing, cap 7 replaced, and plunger 8 released by turning the handle 9. The gun is then charged and ready for operation in the usual manner.

Fixed end closure One of the features of this invention resides in the end closure illustrated in FIGS. 5 and 6 on an enlarged scale, and the manner of constructing and applying this end closure 12 to the cartridge body 10.

With reference to FIG. 5, metal end closure 12 has a central aperture 13 disposed in the end wall 16, which is substantially the same as the internal diameter of the cartridge body 10. Surrounding the end wall is a cylindrical flange 17 which is dimensioned to snugly wedge within the internal surface of the cartridge body 10. The outer periphery of the cap 12 extends radially outwardly from flange 17. The seal 14 is applied to the inner surface of the cap 12 and is preferably composed of a composite sheet with a layer of aluminum foil such as 20, and a layer of Mylar 21.

In assembling the end closure 12 to the body of the cartridge 10, the composite sheet 14 is first placed in position on the inner surface of the end wall 16. Alternatively the sheet 14 may be attached to end wall 16 by either heat sealing or adhesive. In the actual assembly, the outer periphery of the sheet 14 extends beyond the outer periphery of the cap 12. This is because sufiicient free material must be provided to be substantially coextensive with the metal end closure after assembly of the end closure with the cartridge body.

Cap 12 is then spun onto, or crimped onto, the end of the cartridge body so that the sheet 14 is substantially coextensive with the internal surface of the rolled edge on the end closure 12 and the exposed surface of the liner 26 in the cartridge body 10. This exposed surface is produced by compression of the inner plies of body 10 so that the liner is rolled around the end of the body 10 as in FIG. 6.

The cartridge body is, in this particular instance, formed of two or more spirally Wound layers of paper such .as 24 and 25 etc., which are covered with a grease proof liner.

The label 27 can be a moisture barrier or of grease proof label stock.

The crimping or spinning in FIG. 6 provides for an effective seal against any seepage. The Mylar sheet 21 is extremely tough, and resists accidental rupture of the aluminum foil 20, and the foil 20 provides the impervious liner.

A construction has been described which will fulfill all of the objects of the invention, but it is contemplated that some .modifications will occur to those skilled in the art which come within the terms of the accompanying claims.

I claim:

.1.In a disposable refill cartridge tube for reloading a dispensing gun, in combination a tubular body of spirally wound sheets of paper with a liner impervious to oils, and a fixed closure for the lower end of said tubular body, said fixed closure comprising an end wall, a centrally located aperture in said end wall, a cylindrical flange at the periphery of. said end wall adapted to have a slip fit within saidtube body and adjacent the outer edge of said closure, a frangible seal coextensive with said end wall and attached thereto to close said aperture, a free portion on said seal extending beyond the flange on said end wall, said fixed end closure being secured at its outer edge to said tubular body by a rolled bead so as to press said seal into pressure tight sealing contact with said liner and said flange internally of said tubular body and with the closure outer edge and-said liner externally of said tubular body.

2. In a disposable refill cartridge tube for reloading a dispensing gun, in combination a tubular body of spirally wound sheets of paper with a liner impervious to oils, and a fixed closure for the lower end of said tubular body, said fixed closure comprising an end wall, a centrally located aperture in said end wall, a cylindrical flange at the periphery of said end wall adapted to have a slip fit within said tube body and adjacent the outer edge of said closure, a frangible seal coextensive with said end wall and attached thereto to close said aperture, a free portion on said seal extending beyond the flange on said end wall, said seal having a layer of metal foil exposed to the contents of said cartridge and a layer of tough plastic secured to said foil and said closure wall, said fixed end closure being secured at its outer edge to said tubular body by a rolled bead so as to press said seal into pressure tight sealing contact with said liner and said flange internally of said tubular body and with the closure outer edge and said liner externally of said tubular body.

3. In a disposable refill cartridge tube for reloading a dispensing gun, in combination, a tubular body of spirally wound sheets of paper including a liner impervious to oils, and a fixed closure for the lower end of the tubular body comprising an end wall for said closure, a centrally located aperture in said end wall, a cylindrical flange at the periphery of said end wall adapted to have a slip fit within said tubular body and adjacent the outer edge of said closure, a frangible seal coextensive with said end wall and attached thereto to close said aperture, a free portion on said seal extending beyond the flange on said end wall of said fixed closure, said fixed end closure being secured at its outer edge to said tubular body by a rolled bead at the periphery of said fixed closure around the end portion of said tubular body to clamp the end portion of said tubular body between the periphery of said closure and said flange so as to press said seal into pressure tight sealing contact with said liner to form a continuous sealed joint along said flange and around the end of said tubular body.

References Cited in the file of this patent UNITED STATES PATENTS 1,967,191 John July 17, 1934 2,106,577 Sherbondy Jan. 25, 1938 2,111,582 Crewe Mar. 22, 1938 2,179,227 Caten Nov. 7, 1939 2,200,200 Donnelly May 7, 1940 2,303,322 Bigger Dec. 1, 1942 2,325,922 Sehell Aug. 3, 1943 2,652,148 Preifer Sept. 15, 1943 2,833,450 Sherbondy May 6, 1958 2,863,179 Gaugler Dec. 9, 1958 2,902,396 Reynolds Sept. 1, 1959 2,927,543 Sherbondy Mar. 8, 1960