JP2002518260A - Cartridge for containing paste-like dental material - Google Patents

Abstract

The present invention comprises a substantially cylindrical container, one end of which is limited by a forehead having an outlet for a pasty dental material, The present invention relates to a cartridge for containing a paste-like dental material of the type in which the other end of the container is open and a longitudinally movable piston is arranged in the container. In order to enable the effective filling of the so-called patrone with the pasty dental material, while also avoiding contamination of the dispensing equipment and minimizing the loss of dental material during the dispensing operation, the forehead is: It has at least two outlet orifices formed as attachment tubes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The invention comprises a substantially cylindrical container, one end of which is limited by a forehead having an outlet for a pasty dental material, The present invention relates to a cartridge for receiving pasty dental material of the type in which the other end is open and a longitudinally movable piston is arranged in the container.

[0002] A cartridge of this type is known, for example, from DE-A 33 223.
No. 43 is known. The cartridge has a relatively large volume and is used, for example, to fill cells for making dentures. For this purpose, the outlet of the cartridge is mounted in the cell, and the dental material is pressed into the cell by means of a screw spindle acting on the piston. Such a cartridge is suitable for releasing its contents into individual molds.

[0003] Actually in dental technology, and increasingly degree of "cartridge", also called injectors are frequently used, this is a small cartridge having a capacity of 1 cm ³ orders, dental synthetic resin from the cartridge is, It is injected directly into the intended site of the patient's mouth. The patrone is filled in large quantities from large containers in relatively expensive equipment. This container requires relatively high cleaning costs since it is fixedly integrated in the corresponding dispensing machine. With such a pouring equipment,
Once the dispensing operation has begun, this dispensing operation is performed to avoid material loss.
This must be done until the storage tank or container is as empty as possible.

An object of the present invention is to effectively fill a so-called patrone with a pasty dental material and avoid contamination of the dispensing equipment, while at the same time reducing the loss of dental material during the dispensing operation. The aim is to provide a cartridge that can be kept to a minimum.

[0005] An aspect of the present invention for solving the above-mentioned problem is that the forehead has at least two outlet orifices formed as attached pipes. With such a cartridge, it is possible to simultaneously fill at least two patrones, also called injectors. For this purpose, the cartridge according to the invention is connected via a piston to a plunger which presses the dental material into the patrone. The increase in the number of cartridges to be filled simultaneously can be obtained by increasing the number of outlet orifices of the cartridge or by arranging a plurality of cartridges in parallel in an extruder provided with a considerable number of plungers. The advantage provided by the cartridge according to the invention is that the cartridge can be filled with dental material immediately after production and stored therein, without limiting the capacity of the filling device,
In addition, there is no contamination of the filling device. Also, when filling the patrone itself, the pouring equipment is not contaminated. The cartridge of the present invention can be made from inexpensive plastic and can also be configured as a disposable package. The cartridges are suitable for reuse because they can be recycled after use or processed by industrial cleaning methods.

[0006] The plurality of attachment pipes are advantageously arranged symmetrically with respect to the cylinder axis of the container, in particular are formed in a cylindrical shape and are provided on the outer surface of the container-side end with the container end. And has a conical portion that extends toward. In a preferred embodiment, this conical extension comprises two conical partial extensions arranged one behind the other. Such a conical extension results in a high stability of the attachment pipe as well as a correct centering of the cartridge into the dispensing facility, thus ensuring the performance of the cartridge. The conical extension also provides some protection against mechanical stresses, for example during transport.

An annular seal lip is arranged on the outer periphery of the piston of the cartridge, and the seal lip is in contact with the inner wall of the container, and extends from the piston toward the forehead. It is advantageous. As a result, the dental material is scraped off from the inner wall of the container when the piston is pushed into the container, resulting in a high material utilization with no material loss. Advantageously, the piston has a hollow chamber and has a peripheral wall surface in contact with the container inner wall, and the peripheral wall surface is arranged between the sealing lip and the other open end of the container. is there. This is because this arrangement ensures a high stability of the piston inside the container. Furthermore, it is advantageous to removably arrange the lid cap at the other open end of the container in order to seal the interior of the container and, for example, avoid malfunctions of the piston. In addition, it is advantageous to arrange a protective cap on the forehead.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

The cartridge includes a cylindrical container 1 having a circular cross section. The container 1
Is closed at one end by a forehead 2 in which two outlet orifices are arranged symmetrically with respect to the cylinder axis. Outlet orifice is attached pipe 3
Is also formed in a cylindrical shape. The outer peripheral surface of the attachment pipe is a conical part extending toward the frontal head at an attachment portion with the frontal head 2. This conical section 4 guarantees correct centering of the cartridge in the dispensing installation and sufficient stability, so that the disadvantageous situation of damaging or bending the attachment tube 3 during operation of the cartridge is avoided. The conical extension consists of two partial extensions arranged one after the other. The forehead 2 is slightly curved outward.

[0010] The rear end of the container 1 can be closed by a lid cap 5, which is fitted to the container 1 as a protective means until the point of use after filling of the cartridge. Inside the container 1, a piston 6 slidable in the longitudinal direction of the container is arranged. The piston 6 has a front surface 7, the shape of which is adapted to the inner surface of the forehead 2;
This is so that the material contained in the container 1 can be pushed out as completely as possible. On the circumference of the piston 6, an annular seal lip 8 that is in contact with the inner peripheral wall of the container is arranged. The sealing lip 8 extends forward from the circumferential surface 11 of the piston 6, i.e., toward the frontal part 2 of the cartridge, and thus acts as a scraper when the piston 6 is pushed, so that the container 1 The material residue adhering to the inner peripheral wall is scraped off. With this configuration of the seal lip, an annular groove 9 is formed between the circumferential surface 11 of the piston 6 and the seal lip 8, and a through hole can be arranged at the bottom of the annular groove. The hollow chamber is connected to a container chamber formed between the piston 6 and the forehead 2. The piston 6 has a peripheral wall 12 arranged behind the sealing lip 8 when viewed from its front face 7, the peripheral wall being in contact with the inner peripheral wall of the container and therefore of the piston 6 inside the container 1. Stabilize your posture.

The cartridge is filled with a paste-like dental material and stored until the point of use. During its storage, a protective cap 10 is arranged on the forehead 2. The protective cap 10 serves to seal off the attachment tube 3 in order to prevent the material contained in the cartridge from flowing out or back. Further, the protective cap serves as a means for protecting the attachment pipe 3 during transportation and as a means for protecting the material (for example, a photocurable synthetic resin paste) present in the attachment pipe from light. When the cartridge is used, the end of the cartridge away from the forehead 2 is connected to an extruder of an injection facility, a plunger of the extruder is introduced into the hollow chamber of the piston 6, and The piston 6 is shifted toward the forehead 2. Prior to that, each attached pipe 3
A patrone for filling is inserted on the top, and a dental material is pressed into the patrone. The patrone is arranged on a belt conveyor for the line work and can be guided to the attachment pipe 3 by timing control, so that a large number of patrones can be mechanically filled.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a cartridge of the present invention closed by a lid cap, and FIG. 1a is a plan view of the cartridge.

FIG. 2 is a sectional view of a piston, and FIG. 2a is a plan view of the piston.

[Explanation of symbols]

1 container, 2 forehead, 3 attached pipe, 4 cone, 5 lid cap,
6 piston, 7 front, 8 seal lip, 9 annular groove, 10 protective cap, 11 circumferential surface, 12 circumferential wall

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Magnus Zimmer Weerheim Braichstrasse 2 F-term (reference) 3E014 PA03 PE08 PE17 PF06 PF10 4C052 AA17 HH07

Claims (8)

[Claims] 1. A container having a substantially cylindrical shape, one end of which is limited by a forehead having an outlet for pasty dental material, the other end of said container. A cartridge for containing pasty dental material, of the type having an open end face and having a longitudinally movable piston disposed in the container, wherein the forehead (2) comprises: Cartridge for containing pasty dental material, characterized in that it has at least two outlet orifices formed as attachment tubes (3). 2. The cartridge according to claim 1, wherein the two attachment tubes are arranged symmetrically with respect to the cylinder axis of the container. 3. The container (1), wherein the attachment pipe (3) is formed in a cylindrical shape.
3. The cartridge as claimed in claim 1, wherein the outer surface of the proximal end has a conical portion (4) that extends towards the container (1). 4. An annular sealing lip (8) is arranged on the outer periphery of the piston (6), the sealing lip contacts the inner wall of the container, and the piston (6).
The cartridge according to claim 1, wherein the cartridge extends toward the forehead (2) starting from. 5. The cartridge according to claim 4, wherein the piston has a hollow space. 6. The piston (6) has a peripheral wall (12) contacting the inner wall of the container, the peripheral wall being between the sealing lip (8) and the other open end of the container (1). The cartridge according to claim 4, wherein the cartridge is arranged. 7. The cartridge according to claim 1, wherein a lid cap (5) is removably arranged at the other open end of the container (1). 8. A protective cap (10) is arranged on the forehead (2),
A cartridge according to any one of claims 1 to 7.