GB2148236A

GB2148236A - Expelling contents of collapsible containers

Info

Publication number: GB2148236A
Application number: GB08423171A
Authority: GB
Inventors: Gunther Knieriem
Original assignee: Henkel Teroson GmbH
Current assignee: Henkel Teroson GmbH
Priority date: 1983-10-18
Filing date: 1984-09-13
Publication date: 1985-05-30
Also published as: IT8423073A1; CH664133A5; IT1176908B; GB8423171D0; DE8329965U1; FR2553387A1; IT8423073A0

Abstract

A collapsible container 10, containing a pasty material and having a nozzle 11 at its front end and closed rear end, is received in a reception means which consists of a rigid tubular body 8 open at both ends and enclosing an axially displaceable piston 9, which substantially fills the inside cross-sectional surface of the tubular body. The reception means with container inserted therein is removably received in a reception shell 4 of a dispenser gun. The gun piston 3 on the rod 2 bears on the displaceable piston 9 in the tubular reception means compressing the peripheral wall of the container 10 in concertina like manner and thus expelling the pasty material out through nozzle. By receiving the container in the tubular reception means 8 the peripheral wall of the container is prevented from moving laterally as it is compressed. The piston 9 is prevented from falling out of the tubular body 8 by reducing the diameter of the ends of the body 8, eg. by squeezing the ends. <IMAGE>

Description

SPECIFICATION Reception means for a cartridge-like container The invention relates to a reception means for a cartridge-like container, having at its front end a nozzle and whose rear end is closed by a fixed base wall sealingly connected to the peripheral wall, the latter being compressible in the direction of the front end of the container by the emptying pressure exerted by the piston of a gun receiving the container.

Such cartridge-like containers are known, (German Utility Model 82 00 415) and are used for emptying purposes in guns having a reception area formed by a tube. The front end of this reception area is opened for inserting the container by removing a cap and when the piston rod of a gun is retracted, i.e. with the piston located in the rear end of the reception tube, the cartridge-like container is inserted into the reception area. The cap is then screwed down again and the nozzle of the cartridge-like container extends through its central opening.If, after opening the container nozzle, the piston rod of the gun is moved further forwards in the reception area, the piston fixed to the piston rod comes into contact with the base wall of the container and displaces the latter in the direction of the front container end, the peripheral wall of the container then being compressed in a concertina-like manner. Any lateral buckling, bending or other deformation of the cartridge-like container is prevented by the reception area wall surrounding the peripheral wall of the container.

In practice, so-called half-shell guns are generally used for emptying cartridges and their reception area for the rigid cartridge body essentially comprises a semicylindrical wall, so that the cartridge can be placed in the gun without removing closure members. The cartridge nozzle thereby passes into the reception slot of the front support wall of the reception area, with which engages the cartridge wall connected to the nozzle. By displacing the gun piston, the cartridge piston is forced further into the inner area of the cartridge and as a result the pasty content of the latter is forced out of the nozzle.

As such half-shell guns do not support the peripheral wall of a cartridge-like container of the aforementioned type over substantially the entire periphery, they are not suitable for use with such containers, because there is a danger that on displacing the gun piston as a result of the pressure which occurs, the peripheral cartridge would be moved laterally out of the reception area of the gun and the semicylindrical wall forming the reception area.

The problem of the invention is to offer the possibility of using such cartridge-like containers in socalled half-shell guns.

According to the invention the reception means for such a cartridge-like container is a rigid tubular body open at both ends and into which can be inserted an axially displaceable piston, which substantially fills the inside cross-sectional surface of the tubular body.

A cartridge-like container can be placed in the tubular body of the reception means according to the invention, so that the base wall of said container engages on the piston and the reception means can then, in the same way as a conventional cartridge with a rigid peripheral wall, be placed in a half-shell gun, so that the container nozzle is located in the reception slot of the front support wall of the gun. If the gun piston is moved in the direction of the front end of the gun by the displacement of the piston rod of the latter, it engages with the piston provided in the tubular body and moves it against the base wall of the cartridge-like container, so that there is a large-area engagement on the base wall, without there being any tilting of the piston as a result of its size, which largely corresponds to the internal cross-sectional surface of the tubular body.Thus, under the pressure of the gun piston, the piston can displace the base wall of the cartridge-like container in the direction towards its front end, so that the peripheral wall of the container is compressed in a concertina-like manner.

To prevent the piston from falling out of the tubular body, the internal diameter of the tubular body ends can be made smaller than the internal diameter of the area between its ends, so that said ends form a stop for the piston located in the tubular body. This diameter reduction of the ends can easily be achieved by squeezing them.

The invention is explained hereinafter relative to the drawings, wherein show: Figure I partly in elevation and partly in section, a oonventional half-shell gun.

Figure 2 in section a reception means for a cartridge-like container.

Figure 3 the insertion of the container into the reception means according to Fig. 2 Figure 4 the insertion of the reception means containing the container in the half-shell gun of Fig. 1.

Figure 5 partly in elevation and partly in section, the half-shell gun containing the reception means with the cartridge like container, the latter already being somewhat compressed.

The conventional half-shell gun shown in Fig. 1 has a grip 6, through which extends a piston rod 2, which at its front end, to the left in Fig. 1, carries a gun piston 3. The piston rod is displaceable to the left in Fig. 1 in per se known manner by means of handle 7 and can, without difficulty, in a corresponding position of handle 7, be retracted to the initial position shown in Fig. 1. The reception area on grip 6 comprises a semicylindrical shell 4, shown in section, to whose front end is fixed a support wall with a reception slot 5.

Conventionally such a gun contains cartridges with a rigid peripheral wall and a displaceable piston, provided in the rear end and sealingly engaging on the inner face of the peripheral wall, so that the nozzle of the peripheral wall is located in reception slot 5 and the transition surface between the nozzle and the peripheral wall of the cartridge engages on the support wall having reception slot 5. On displacing piston rod 2 by the repeated oper ation of lever 7, the gun piston 3 is engaged on the cartridge piston and the latter is moved forwards, i.e. to the left in Fig. 1, so that the pasty cartridge content is pressed out of the open nozzle thereof.

A reception means according to Fig. 2, which has a rigid tubular body 8, in which is displaceably inserted a piston 9, serves to receive a cartridge-like container having a non-rigid peripheral wall. The internal diameter of tubular body 8 is obviously slightly larger than the external diameter of the peripheral wall of the container to be inserted, whilst piston 9 is dimensioned in such a way that it is axially displaceable in tubular body 8, but there is no risk of a tilting taking place, i.e. the piston 9 slides with its outer peripheral surface along the inner face of tubular body 8.

A cartridge-like container 10 having a nozzle 11 at its front end is placed in one end of the tubular body 8, so that at least the outer area of base wall 10 engages on piston 9 (Fig. 3). This is followed by the insertion of the tubular body in the gun according to Fig. I as intimated in Fig. 4. Nozzle 11 passes into the reception slot 5 and piston 9 is positioned adjacent to the gun piston 3.

As can be gathered from Fig. 5, the gun piston 3 displaced towards the front end of the gun by the movement of piston rod 2 by lever 7 presses against piston 9 of tubular body 8, so that the latter is pressed firmly against the base wall of container 10. Thus, container 10. is moved so far forwards, that it engages on the support wall having reception slot 5 and is supported there. On further movement of piston rod 2 in the direction of the front end of the gun, the peripheral wall of container 10 is compressed in concertina-like manner, as indicated in the rear area of container 10 in Fig. 5, and the pasty container content is forced out of the previously opened nozzle 11.

Claims

1. Reception means for a cartridge-like container, having at its front end a nozzle and whose rear end is closed by a fixed base wall sealingly connected to the peripheral wall, the peripheral wall being compressible in the direction of the front end of the container by the emptying pressure exerted by the piston of a gun receiving the container, the reception means comprising a rigid tubular body, which is open at both ends and encloses an axially displaceable piston which substantially 10 fills the inside cross-sectional area of the tubular body.

2. Reception means according to claim 1, wherein each end of the tubular body has an internal diameter which is smaller than the internal diameter of the area between the ends of the tubular body.

3. Reception means according to claim 2, wherein the ends of the tubular body have been reduced in diameter by squeezing.

4. Reception means for a cartridge-like container, such reception means being substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawing.

5. A dispenser gun for dispensing the pasty contents of a cartridge-like container having a nonrigid peripheral wall, including a releasable rigid 25 tubular body, a piston slidably received in said container and substantially filling the cross-sectional area of the tubular body, means for supporting said tubular container in the gun, a front wall having means to receive the nozzle of a said cartridge-like container in the container carried by the supporting means, and a piston rod adapted to be driven towards said front wall and along the axis of said tubular container when carried by the supporting means, the tubular container having a front end open to receive a said cartridge-like container.