Toilet rim block and rim block cage

Abstract

A toilet rim block which consists of an outer cover and a core, and to a rim block cage including the toilet rim block. The outer cover includes a first composition and the core includes a second composition. Preferably, the first and the second compositions differ from each other by at least one of the following features: different active substances, different concentration but same active substance, and different viscosity. The outer cover partly encloses the core, and the core protrudes on at least two faces of the toilet rim block right to the surface as a pole and is exposed. The toilet rim block is spherical and the second pole protrudes to the surface on the face of the toilet rim block opposite the first pole, and is exposed.

Claims

1. A toilet rim block comprising: at least a casing and a core, the casing comprising a first composition and the core comprising a second composition, the first and the second composition differing by at least one of the following features: different active ingredients, different concentration of the same active ingredient, different viscosity; the casing surrounding the core in part, the core projecting as two poles, a first pole and a second pole, on two opposing sides of the toilet rim block, the two poles projecting as far as to a surface of the toilet rim block, thus being exposed, the first pole and the second pole connected by a central portion of the core, wherein the core has a cross-sectional profile along the toilet rim block through the first pole, the central portion, and the second pole, wherein the cross-sectional profile tapers from the first pole to the central portion, and wherein the cross-sectional profile tapers oppositely from the central portion to the second pole; and wherein the toilet rim block is spherical.

2. The toilet rim block according to claim 1, wherein an exposed face of the core changes in size with uniform wear of a surface of the toilet rim block.

3. The toilet rim block according to claim 2, wherein of the exposed face of the core increases in size with uniform wear of the surface of the toilet rim block.

4. The toilet rim block according to claim 2, wherein the exposed face of the core reduces in size with uniform wear of the surface of the toilet rim block.

5. The toilet rim block according to claim 4, wherein, an area ratio of an exposed surface of the core to an exposed surface of the casing is between 5% and 67%.

6. The toilet rim block according to claim 5, wherein the area ratio of the exposed surface of the core to the exposed surface of the casing is between 10% and 38%.

7. The toilet rim block according to claim 4, wherein, when the toilet rim block has been partially dissolved, the area ratio of the exposed surface of the core to the exposed surface of the casing is between 1:3 and 1:1.

8. The toilet rim block according to claim 1, wherein at least one portion of the core is a cylindrical segment.

9. The toilet rim block according to claim 8, wherein the central portion of the core is a cylindrical segment.

10. The toilet rim block according to claim 1, wherein the cross-sectional profile of the core has a tapering cross-sectional reduction between the first pole and the second pole.

11. The toilet rim block according to claim 1, wherein the cross-sectional profile of the core has a tapering cross-sectional enlargement between the first pole and the second pole.

12. The toilet rim block according to claim 1, wherein the toilet rim block has a sphericity of between 0.8 and 1.

13. The toilet rim block according to claim 1, wherein the casing surrounds the core in an annular manner.

14. The toilet rim block according to claim 1, wherein the first and the second composition differ by a different concentration of the same active ingredient, wherein the core has a concentration of an active ingredient that is at least 1 wt. % to 10 wt. % higher.

15. A rim block cage for hanging in a toilet bowl comprising at least two toilet rim blocks and a retaining means for holding the at least two rim blocks, wherein each of the at least two toilet rim blocks comprises: at least a casing and a core, the casing comprising a first composition and the core comprising a second composition, the first and the second composition differing by at least one of the following features: different active ingredients, different concentration of the same active ingredient, different viscosity; the casing surrounding the core in part, the core projecting as two poles, a first pole and a second pole, on two opposing sides of the toilet rim block, the two poles projecting as far as a surface of the toilet rim block, thus being exposed, the first pole and the second pole connected by a central portion of the core, wherein the core has a cross-sectional profile through the first pole, the central portion, and the second pole, wherein the cross-sectional profile tapers from the first pole to the central portion, and wherein the cross-sectional profile tapers oppositely from the central portion to the second pole; and wherein the toilet rim block is spherical.

16. The rim block cage according to claim 15, wherein the first poles of the at least two toilet rim blocks are arranged in a way that the poles are pointed to the same direction relative to one another.

17. The rim block cage according to claim 15, wherein the first poles of the at least two toilet rim blocks are arranged in a way that the poles are pointed to a different direction relative to one another.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) List of figures

(2) FIG. 1 is a plan view of the pole of a toilet rim block according to the invention.

(3) FIG. 2 is a side view of a toilet rim block according to the invention.

(4) FIG. 3 shows a cross section of the toilet rim block from FIG. 2 in the direction A-A.

(5) FIG. 4 shows a cross section of the toilet rim block from FIG. 2 in the direction B-B.

(6) FIG. 5 is a cross-sectional view of the pressing process before and after pressing.

(7) FIG. 6 shows a cross section of a rim block cage comprising 3 toilet rim blocks.

DETAILED DESCRIPTION OF THE INVENTION

(8) In a particularly preferred embodiment, the toilet rim block 1 comprises the casing 2 and the core 3. The core 3 forms a pole 4 which is visible in the plan view according to FIG. 1. The first pole 4 and the second pole 5 are visible in the side view according to FIG. 2. The core 3 is surrounded by the casing 2. The casing 2 is annular, as can be seen in the cross-sectional view A-A having an approximately elliptical cross section for example, and in the cross-sectional view B-B as a circular ring. The pole 4 and/or the pole 5 can be more or less pronounced in each case. This allows predefined, controlled release of active ingredients over the temporal progression. The diameter of the segment 6 can also be smaller or larger. Instead of a cylindrical portion of the segment 6, said segment can also have a different geometry.

Comparative Example

(9) Toilet rim blocks were produced having the following compositions and used as reference:

(10) TABLE-US-00001 E1 C.sub.10-13 lin. Alkylbenzene sulfonate-Na 26 Fatty alcohol sulfate-Na C.sub.12 fatty alcohol sulfate-Na C.sub.14-16 olefin sulfonate-Na 18 C.sub.16-18 fatty alcohol ethoxylate 25 EO 8 Cellulose Trisodium citrate dihydrate 1 Sodium sulfate to make up to 100 Sodium carbonate C.sub.12-18 fatty acid monoethanolamide Sodium silicate Perfume 4.5 Dye +

(11) The perfume composition used was composed as follows:

(12) TABLE-US-00002 Dosage wt.-% Name CAS no. 12.16 dipropylene glycol 25265-71-8 8.51 dihydromyrcenol 18479-58-8 7.30 terpineol 8000-41-7 4.86 linalyl acetate 115-95-7 3.65 lemon oil messina 84929-31-7 3.65 agrunitrile 51566-62-2 3.65 orange oil sweet, Ital. 8028-48-6 3.65 otbcha 88-41-5 3.65 styrallyl acetate 93-92-5 3.65 linalool 78-70-6 2.43 aldehyde c-08 124-13-0 2.43 alcohol c-08 111-87-5 2.43 allyl amyl glycolate 67634-00-8 2.43 benzyl acetate 140-11-4 2.43 hedione 24851-98-7 1.52 linalool oxide 1365-19-1 1.52 lemonile 61792-11-8 1.52 bromelia 93-18-5 1.52 yara yara 93-04-9 1.52 aldehyde c-10 112-31-2 1.51 aldehyde c-14 (so-called) 104-67-6 1.50 benzyl acetone 2550-26-7 1.50 acedyl 54830-99-8 1.50 propidyl 68912-13-0 1.50 isobornyl acetate 125-12-2 1.50 terpinolene 30 586-62-9 1.50 lilial, lysmeral 80-54-6 1.50 citronellol pure 106-22-9 1.50 geraniol pure 106-24-1 1.50 nerol standard 106-25-2 1.50 phenethyl alcohol 60-12-8 1.50 geranyl acetate 16409-44-2 1.50 hexyl cinnamaldehyde (alpha) 101-86-0 1.50 isoraldeine 70 1335-46-2 1.50 beta-ionone synth. 14901-07-6 1.50 iso e super 54464-57-2 1.50 ethylene brassylate 105-95-3

(13) The composition was mixed, subsequently extruded to form a strand, cut, and shaped into balls in a forming die. The final diameter of every ball was 25.4 mm.

Example

(14) Toilet rim blocks according to the invention were produced as follows. A first composition A was provided, as in the reference example, the only difference being that the perfume concentration was changed from 4+/0.5 to 5.5+/0.5. A second composition B was provided, as in the reference example, the only difference being that the perfume concentration was changed from 4+/0.5 to 2.5+/0.5. As in the comparative example, the compositions were in each case mixed. The mixture was then extruded to form a coaxial strand, comprising composition A as the inner strand and composition B as the outer strand. An extruder was used for this purpose. The coaxial, cylindrical strands had an outer diameter of 20.5 mm and an inner strand diameter of 7.3 mm. The strand was cut into cylinders of 26.36 mm in length, the cylinders each being shaped into a ball. The final diameter of every ball was 25.4 mm.

Comparative Tests

(15) Balls from the example and from the comparative example were used in identical rim block cages and flushed in a test chamber in each case. The test chambers have an identical structure and are separated from one another so that there is no exchange of air between the chambers. Each test chamber additionally comprises a toilet bowl, and is rinsed by a constant airflow. The test chambers are located in a space (measuring space) specifically designed for the test chambers, which space is odorless, can be ventilated well and can optionally be subjected to forced ventilation by means of an activated carbon filter. The volume fraction of carbon dioxide in the measuring space is less than 0.15 vol. %, the air exchange rate is at least 4.4 m.sup.3/h per person. The temperature in the measuring space is 20 C. and is constant during measuring. The measuring space is not exposed to any direct solar radiation, and other interfering sources of light and noise are minimized as far as possible. All the devices that are associated with the test chamber must be odorless. The odor intensity is assessed by at least 20 testers, with generally equal numbers of men and women, trained in odors, being employed, who are all at least 16 years old. At the time the compounds are assessed, the testers are not influenced by interfering factors such as contact with perfumes, food, other natural stimulants or by colds or allergies.

(16) The rim block cages were hung in identical positions in the toilet bowls, and each toilet bowl was flushed out a times per hour. Each flush used 6 liters of water. The testers made the measurements at 4, 72, 96, 120, 144, 168 and 172 hours. To carry out the assessment, the tester opens the window, positions their head in the interior of the test chamber, carries out the smell test, withdraws their head again and then closes the window.

(17) The testers had the clear impression that the fragrance strength of the example according to the invention was greater than in the comparative example. The user perceives that the fragrance has increased, compared to the comparative example, after just 72 hours. Since the core was exposed, the initial difference from the comparative example was small; at the start the user perceived a loss of just 24%, but this was made up for surprisingly quickly. Surprisingly, the user results were such that the toilet rim blocks and rim block cages according to the invention emitted a stronger fragrance than the reference over the entire usage time, although the amount of perfume used is identical.

(18) The essential part of the method according to the invention is shown, in cross section, in FIG. 5. A co-extruded strand portion 7 is placed in a press 8. The final shape of the press 8 is a ball having an identical volume to the strand portion 7. The strand portion is shaped into a ball according to the invention by the cavities of the press 8 being brought together and the final shape thus being achieved.

(19) FIG. 6 shows a rim block cage, by way of example, in accordance with the invention. FIG. 6 shows 3 toilet rim blocks that each comprise a casing 2 and a pole 3. The toilet rim blocks are shown in the rim block cage that is shown from the front, by dashed lines and comprising a hanger. The cage is shown schematically so that the toilet rim blocks are more clearly visible. The toilet rim blocks are arranged in an irregular manner relative to one another, since each pole 4 faces in a different direction.