DE2007106A1 - Manifold and method of filling it - Google Patents

Description

Attention »

DIPL.-CHEM. W. RÜCKER DIPL.-ING. S. LEINE " ^eU ^ ^{n8chrift: /}

Burckhardtetr. 1 PATENTANWÄLTE T.1.6284 73 and 628474

. Patent attorney «W. WoW. S. Uirw. 3 Ηοηηοντ, Aul «iiwii. 3 HANOVER. Λ "· * · 'A ^ frgyapwr mi ..

February 16, 1970 Frede Andresen Petersen «won« »u ι.

KABEU: BIPAT HANNOVEK Down below Zwdimi

259/37

Manifold and method of filling it

The invention relates to a distributor pipe and a method for filling it. It particularly relates to a manifold for toothpaste or similar plastic agent.

There is a general technical desire, the known To ereetzen lead pipes or hoses through pipes made of modern plastic materials, and that is already the case happened when it comes to pipes for liquid funds. For pipes or hoses for toothpaste and the like However, it has proven necessary to use an absolutely non-elastic material in order to achieve the Tendency to avoid the leading part of the paste being sucked back into the tube when the tube is released, after some of the paste has been squeezed out. In this case, the paste would not immediately go to the next

SL / K ~ ² ~

009835 / U68

Posiidi.ck: Hannover 43400 - Bank: Commtribank Hannover 3/298221 ■ Dreidn.r Bank Hannover 1039435 · Dcutidi «Bank Hannover 7/16605

Use of the pipe can be squeezed out as sun bites a certain amount of air must be squeezed out.

The invention is based on the object of an Eobr create that in particular for toothpaste or similar thick Means is suitable and is made of a plastic material or quite generally of a material can be that shows at least a certain elasticity without the disadvantage described above occurs.

The object underlying the invention is achieved in that within the Robr cylinder between the rear end of the tube contents and the closed rear end of the tubular cylinder a sliding piston is provided, which fills the cross-section of the tubular cylinder with a tight fit.

Due to the solution according to the invention, it is possible by manipulation from the outside the sliding piston by an inwardly directed, directly behind the sliding piston attacking pressure to push forward in order to push part of the paste out of the tube. The sliding piston can return from the new position either through its frictional contact with the pipe wall or through a ventilation hole in the sod of the pipe can be prevented. This ventilation hole is used to see the atmosphere Establish air pressure behind the piston so that the rear part of the tube takes its normal position and shape can without any suction on the lower

-3-009835 / U68

or the rear end of the sliding piston is exercised. Aue this (Jr and en the paste is not sucked back into the pipe, the tube is therefore able to deliver paste immediately the next time it is used.

In principle, the sliding piston can be formed by a ball or a piece of a cylindrical rod, has sufficient axial extension to prevent the sliding piston from rotating in the tubular cylinder. According to the In the invention, however, it is expedient to use a sliding piston, the front side of which is substantially round Has circumference, while it has increasing width and decreasing height towards the rear, these details on are related to a horizontal pipe. In this way it is possible to get the sliding piston very close to the rear end of a pipe, usually by a simple straight ramification of the opposite parts of the Tubular cylinder is closed.

With the aid of the drawing, the invention will be explained in more detail below using an off fiibrungib ei game.

Pig. 1 is a longitudinal section of a pipe according to FIG expedient embodiment of the invention;

Pig. Figure 2 is a corresponding section and shows the tube from the side;

Pig. 3 and 4 show Yiriar and rear views of the Sliding piston;

-4-009835 / U68

fig. 5 and 6 correspond to FIGS. 1 and 2 and «own the sliding piston la an advanced position in the tube.

The pipe shown in the drawing (often auoh ale tube designated) is an eich in the traditional way educated. It consists of a tubular cylinder 2 made of plastic, which is welded shut along a transverse bottom edge 4 1st. Bas material has a certain elasticity, so it tends to keep the expanded or tubular shape. When placed on a table, the tubular cylinder assumes a lying position, as seen in the top view is shown in Fig. 1 and relates to the following description on this orientation of the Robrzyllnders, as far as the height, width, etc. are concerned.

According to the invention, a sliding piston 6 is inside the Robr cylinder in an initial position near the arranged rear end of the Robrzylinders. The piston has a disk-shaped Mlttelabscbnltt 8, the fills the cross-section of the Robr cylinder 2; In particular, the vertical extension of this disk-shaped part is somewhat larger than the inner diameter of the Robr cylinder (β. 71g. 2), so that the wall of the Robr cylinder is continuous slightly at least in the area of the upper and lower Sections of the sliding piston is stretched so that Bulges 10 in the wall of the tubular cylinder at this point

-5-009835 / U68

lea are formed. The circumference of the disk-shaped central section 8 is somewhat elliptical, with the main axis running parallel to the bottom edge 4 of the tubular cylinder. The Gleitkolbea has a front part 12 which tapers so that it is more or less adapted to the shape of the inner front end of the tubular cylinder. Aa on the rear side, the disk-shaped central section 8 of the sliding piston is provided with an extension 14, the width of which increases towards the rear (Pig. 1) and the height M of which increases

decreases towards the rear (Fig. 2) · Lateral edge offsets 16 of the rear extension 14 of the sliding piston widen the adjacent walls of the tubular cylinder la direction the rear corners of the tubular cylinder, making the disc-shaped Middle section is prevented from rotating la the RohrzylInder, despite the short axial extension the lower and upper edges of the soheibea-shaped central abs, like that of Pig. 2 and 4 can be seen is.

How best from Pig. 2 and 4 are the ™ upper and lower planes of the rear extension 14 of the tubular cylinder are rounded in the region of their edges concavely curved in the region of their central sections; the rear pheoheu immediately behind the upper and lower Edges of the disk-shaped central section 8 form angles with the axial transverse plane of the tubular cylinder voa uage-

-6-

009835 / U68

about 45 °; this angle should not be less than 30 °, however, it can easily be 60 °. The lateral edge absobnltte 16 have a length which is approximately half that Corresponds to the diameter of the pipe cylinder; this length can be greater or less, but if it is less than e.g. a quarter of the diameter of the cylinder tube, see above it can happen that the sliding piston is in the Robrzyllnder twisted when unbalanced pressure is applied to it.

If paste is to be dispensed or distributed from the tubular cylinder, the walls of the Robr cylinder become direct compressed behind the beads 10, as indicated by arrows in Fig. 2, whereby the sliding piston is pushed forward. The sliding piston stops as soon as the actuation pressure disappears, and the Suction on the rear side of the piston caused by the tendency of the section of the Robr cylinder to expand is generated behind the sliding piston, is not sufficient to move the sliding piston to the rear, due to the tight fit of the sliding piston in the tubular cylinder. If the Robr cylinder is thus tightly closed at the back and the sliding piston is moved forward, the tubular cylinder assumes a shape as shown in Pig. 5 and in particular in PIg. 6 is shown. The Gleltkolben can continue after be pressed forward, so that it causes a practically complete emptying of the tubular cylinder.

-7-

009835 / U68

As indicated by dashed lines la flg. 5, may have a notch 18 along the weld line that follows the walls of the tubular cylinder along the bottom edge 4- be provided, whereby the space behind the sliding piston is freely in communication with the external atmospheric pressure. As a result, the tubular cylinder 2 is free to assume its natural position, as shown by dashed lines in Pig. 6th indicated 1st.

The notch 18 can be through a through hole 19 ^

(Pig. 1), which is located a short distance from the bottom edge, which makes this hole as Means for hanging the tubular cylinder on a horizontal support rod can be used. When the sliding piston is pushed forward will, so slide? its outer edge tight and close to the wall of the tubular cylinder along, so that none or practically no fast remains behind the sliding piston. The tubular cylinder can be transparent in at least one longitudinal zone so that the user can be sure that all paste has been transported through the sliding piston. ^ j This also makes it easier for the user to reach directly behind the sliding piston when the tubular cylinder does the next shark to be used.

The tubular cylinder can in conventional catfish by the rear end filled and then closed when the sliding piston is inserted; the rear end of the pipe cylinder

-8th-

009835 / U68

derθ may have a slightly enlarged diameter to accommodate the to simplify initial introduction of the sliding piston. The notch 18 and the locb 19 for air can simultaneously be attached with the welding of the bottom edge 4

However, the use of the sliding piston makes it possible to fill the tubular cylinder through its front end; the tubular cylinder can be supplied by the manufacturing company be delivered that the sliding piston is in the front end of the tubular cylinder is located, while the bottom of the tubular cylinder

W linders is already closed, so filling through

the front opening of the tubular cylinder can take place. It However, it is a prerequisite that the sliding piston can move backwards unhindered, so that either a notch 18 or a Locb 19 is required, or the space behind the sliding piston must be evacuated beforehand, corresponding to the position shown in FIG. 6, a vacuum behind the sliding piston can either be achieved in that a tight welding of the bottom edge 4 takes place, after

A which the air is sucked out of the space behind the sliding piston is, or by the fact that the welding then takes place, when the sliding piston is in the position shown in FIGS. 1 and 2 and that then - by hand or mechanically - the Sliding piston is pressed forward. The invention also relates to methods of this type of manufacture and Filling of the tubular cylinder.

-9-009835 / U68

If the tubular cylinder la is filled in the usual way through its rear end and the sliding piston then in front the pipe end brought together by welding the pipe end la, so an undesirable air cushion can form in front of the piston form. This is to be avoided, however, by the wall of the tubular cylinder - by hand or mechanically - in the direction the arrows b according to Pig. 1 is compressed, for example in front of the side edge portions 16 of the sliding piston, during the sliding piston is inserted into the tubular cylinder. _,

As a result, the wall of the tubular cylinder is deformed so that air can escape along the lateral edge sections 16. In order to achieve an improved wiping effect along the inner wall of the tubular cylinder, it may be desirable to provide the middle section 8 of the sliding piston with a protruding wiping edge also in the area of the lateral edge sections 16, but this would prevent the described escape of air by inserting the sliding piston In addition, such a special wiper edge of φ seems to be of little importance for a satisfactory function of the sliding piston.

-10-

009835 / U68

Claims (8)

Expectations IJ distribution pipe, with a Robr cylinder made of thermoplastic material or another flexible, resilient material, characterized in that a sliding piston is provided within the tubular cylinder between the rear end of the pipe contents and the closed rear end of the Robr cylinder, which fills the cross section of the Robr cylinder with a tight fit . 2. Manifold according to claim 1, characterized in that the front of the sliding piston has a substantially round circumference, while to the rear bin the sliding piston asked increasing width and decreasing height. 3. Manifold according to claim 2, characterized in that the forwardly tapering side parts of the rear part of the sliding piston have a length of at least a quarter or preferably half the effective sliding piston diameter. 4. Manifold according to claim 2 or 3, characterized in that the rearwardly tapering upper and lower surfaces of the rear part of the sliding piston form an angle of at least 30, preferably 45 ° to 60 ° -11-009835 / U68 with the queryerlaufeadea Axialebeae at least immediately form behind the outer upper and lower sections of the sliding piston. 5. Distribution pipe uacb Aas claim 2, characterized in that the diameter of the sliding piston is preferably slightly larger than the inner diameter of the tubular cylinder in the upward direction of the sliding piston. 6. Manifold oach Aas claim 2, characterized in that the upper and lower surfaces of the rear portion of the sliding piston in the vicinity of the leg side edge are convexly curved and the central areas are concave. 7. Distributor pipe according to one of the preceding claims, characterized in that an air hole is provided in the outer wall of the tubular cylinder la near its rear end. 8. A method for PÜTluug a pipe according to one of the preceding claims, characterized in that the filling material is pressed through the front end into the pipe while the piston is in an advanced initial position la the Rohrzyliader. 009835/1468 Blank page