EP0647115B1 - Cleaning cloth - Google Patents

Abstract

PCT No. PCT/EP93/01246 Sec. 371 Date Dec. 22, 1994 Sec. 102(e) Date Dec. 22, 1994 PCT Filed May 19, 1993 PCT Pub. No. WO94/24922 PCT Pub. Date Nov. 10, 1994A cleaning cloth for stretching onto a wiper frame intended for such a cleaning cloth, with pockets for receiving the opposite stretching bow ends (S), and is distinguished by a bead or stiff edge (18) which extends along the longitudinal sides of the cleaning cloth and lies to the outside relative to a seam (16) parallel to the cloth, and by a bead (20) which lies to the inside relative to the seam (16), said seam (16) forming a sort of tilting articulation for the stiffening (18; 20) consisting of the two beads.

Description

The invention relates to a cleaning cloth for clamping onto a wiping frame for such a cleaning cloth, with pockets for receiving the opposite ends of the clamp, as e.g. is known from DE-A-3 139 245. When using the known cloth on a wall, the edge of the cloth rises up and ensures that the wall attachment is cleaned, e.g. a rubbing strake.

Known cleaning cloths of this type are either fringed on the edge, simply stretched over the frame or stand on all sides with an edge about 5 cm beyond the frame edges.

Only a short piece of cleaning wipes protruding from the sides of the frame have been used for more than 25 years. another construction in use. The stenter frames are also general state of the art, as they are commercially available, so that they are not described in detail here. Generally, the wiper frames are angled into the pockets and then stretched to their extended, stable position.

It has now been found that known stretch cloths were not able to wipe sufficiently, especially in the corner area. These were also composed of several materials (the bags were also made of stiffer plastic), which was difficult to recycle due to the separation of the various materials and which also caused environmental problems due to the high proportion of plastic.

The invention has for its object to absorb dust and dirt better than previous cleaning wipes, also in the Corner areas on the baseboard can be cleaned better without the person cleaning them having to bend down and may have to clean these areas with an extra cloth.

This is achieved surprisingly simply by a bead (stiff edge) on the outside along the long sides of the cleaning cloth, based on a seam parallel to the cloth, and a bead on the inside, based on the seam, the seam forming a seesaw joint for the two beads.

In a second embodiment of the invention, the object is achieved by the features of claim 13.

The edge of the cleaning cloth is preferably folded over and sewn onto itself at least twice, the resulting outer bead being at least three layers and the inner bead resulting therefrom being at least two layers.

The width of the inner bead and / or outer bead is approximately 2 cm in relation to the seam in a preferred embodiment.

The best results were obtained when the seam was folded twice and sewed 1 - 2 cm away from the edge. The result is a stiff edge, a kind of bulge that protrudes into the corner and, thanks to the fixed edge, absorbs dust and dirt better than the previously known cleaning wipes. The edge is so tight and short that it does not turn over.

The advantage over previously known folding edges of the cleaning cloth, which can protrude from the skirting board and thereby create a hollow space in the corner, is that the resulting bead can be cleaned optimally in the corner due to the double or multiple cover and the narrow seam guaranteed.

The multiple turning over creates a relatively stiff construction consisting of outer bead, inner bead and seam, the forms a kind of rocker when the seam lies on the bracket.

When inserted, the bracket presses this "rocker" around the seam, since it slips under the inner bead, thus ensuring optimal cleaning.

The fact that the bags are made of the same material as the cloth (the cloth is sewn for reinforcement in one or more layers) results in a considerable environmental advantage.

The fact that the seam runs approximately in the middle of the double or multiple envelope on the edge creates a hollow space between the lower contact surface and the bead, so that the bracket moves under the bead from the inside during cleaning (under the inner bead) can be pushed and thus prevents the cloth from folding upwards, as is the case with known cloths.

The fact that the ends are particularly stiff prevents the dirt from being pushed back and forth.

By placing the tensioning frame there is automatically a pressure downwards when moving to a wall or skirting board, so that an optimal cleaning effect can be achieved in the corners where the wall or skirting board meets the floor at an angle of approximately 90 °.

Furthermore, the protrusion of the stenter into the bead ensures that it does not come into contact with furniture or the like, thus preventing damage.

The construction according to the invention is also not as rigid overall as if plastic were used for the bags. Wringing out becomes easier, the effort is considerably reduced.

According to another embodiment, the cleaning in the corners is improved in that the cleaning cloth has a trapezoidal shape in cross section to its longitudinal direction, this truncated cone-shaped body of the stretching cloth widening downward. Especially if the room had undercuts, if corners were to be cleaned less than 90 °, this conical shape or trapezoidal shape in cross-section or truncated cone-shaped shape of the stretch cloth or pile has the advantage over the known products that even in negative offset walls an optimal Cleaning these corners can be achieved.

In a further development of the invention, the cleaning cloth can have an intermediate layer, on one side, for example the top, of which there is a long pile, and on the other side, for example the underside, of which there is a short pile.

Bags as before are on both sides.

Thus, by simply turning the cleaning cloth, the effect of coarse dirt and the effect of fine dirt can be exerted.

In a development of the invention, a band of elastic material such as rubber is sewn into the pockets. This makes the seat even tighter and the clamping more elastic.

A folded end of the rubber band can be attached to the base body, e.g. of the long pile, the other end may be sewn through the intermediate layer, for example with the second pile side.

The elastic band can be sewn in two layers, the inner layer can be shorter than the outer one. This ensures that the thing is particularly elastic, since first the inner layer of the rubber band is tensioned, then, to ensure a better grip, the outer layer is also tensioned.

It is of course not excluded that the top and bottom of the cloth have the same properties.

You can simply attach two such cleaning floor towels with a layer in between with their backs against each other.

The rubber band results in a tight fit of the floor cloth on the holder, which is inserted into the pockets as before.

The same structure on the top and bottom helps that the cloth can clean or dry the double surface. This also extends the lifespan of the cloth and improves cleaning in the corners. Fast work is guaranteed by the tight fit of the cloth. The water absorption when cleaning or wiping dry is very good.

• Figur 1 ein mehrfach umgelegten Reinigungstuch
• Figur 2 ein solches mit Naht versehenes Tuch
• Figur 3 ein solches Tuch mit Spannrahmen zeigt
• Figur 4 und Figur 5 sind alternative Ausführungsformen
• Figur 6 zeigt eine Konstruktion für besondere Eckenreinigung.
• Figur 7 zeigt eine weitere Ausführungsform, und zwar Figur 7A in der Draufsicht, Figur 7B in der Ansicht und Figur 7C als Schnitt gemäß der Längsmittelebene der Figur 7.

For example, embodiments of the invention will now be explained in more detail with reference to the accompanying drawings in which

• Figure 1 is a multiple folded cleaning cloth
• Figure 2 such a seamed cloth
• Figure 3 shows such a cloth with a tenter
• Figure 4 and Figure 5 are alternative embodiments
• Figure 6 shows a construction for special corner cleaning.
• FIG. 7 shows a further embodiment, specifically FIG. 7A in plan view, FIG. 7B in view and FIG. 7C as a section along the longitudinal center plane of FIG. 7.

The cloth 10 according to FIG. 1 is struck back at 12 once on itself, a second time on itself. This cloth 10 also serves to form the pockets.

Figure 2 shows how the cloth is folded, manufactured, needled and thus stiffened twice. An outer bead is formed at 18 and an inner bead at 20.

Figure 3 shows the construction after insertion of the tenter or the stretcher bracket S. It can be seen that the stiffening around the seam 16 one of the inner bead and outer bead 18; 20 rocker was formed, which pivots around the seam when inserting the bracket S or when starting against the wall. The bracket S engages due to the construction formed under the bead 20 and thus constantly presses the outer bead 18 down. W denotes the wall, against the corner of which is formed by the skirting board the short, stiff bead starts. As said, by pressing against the wall, the tenter frame is pushed under the pile or cleaning rag and (bead 20) presses the bead 18 projecting over the tenter frame S so that it can no longer fold over.

Another construction is shown in Figures 4 and 5. Here, a kind of pocket or bar 32 is created perpendicular to the plane of the horizontal bead, that is to say vertically, from the material (covering) of the cleaning cloth lying horizontally by sewing at 30. According to FIG. 4, this “tilting bar” 32 tilts up and down around the seam 30, according to FIG. 5 at 34 only downwards. This vertical bar can be stiffened as desired, for example by needling, gluing, stapling or the like, in order to remain in its position. A deposit is also possible. This vertical bar can also be designed like an accordion in other embodiments.

Figure 6 (sheet 1) finally shows a different construction. In a room R, the cleaning effect is given in known constructions. The room R has, for example, a shape with corners smaller than 90 °. Here it is the case that the cleaning cloth ST does not reach corner E, so this area remains uncleaned.

According to the invention, on the other hand, a cleaning cloth 40 is proposed here which has a conical, trapezoidal (in cross section transverse to the longitudinal extension) or frustoconical cross section Has. The truncated cone extends downwards. With the tip or edge it is possible to fully extend the corners, nevertheless the base part 44 lies fully on. The cleaning bracket can have a round or square or square cross section. Even in negative offset walls, as shown in Figure 6, this corner is optimally cleaned.

The cleaning cloth according to the invention can be made on the basis of knitted fabrics, in particular knitted fabrics, knitted fabrics should not be excluded, but are rarely used for industrial purposes.

In addition, the cleaning cloth can wear a pile that is designed in a special way. A fiber with a special texture is used, namely fibers with a saw blade-like effect or saw blade-like design are used. The success is that this means that only 5% of the cleaning agent has to be used as before in order to achieve a good result.

In a special development of the invention, a saw blade-like fiber is closely associated with a smooth fiber. This assignment can be loose, can consist of twisting or twisting and welding. Depending on the requirements, cotton components can also be used in addition to the synthetic fibers.

The back of the carrier material can be prepared by adding chemical agents so that the fibers weld to the carrier material when heated or by this agent.

The fact that two completely oppositely formed fibers are used creates a very desired combination effect: the saw-like fiber will tear open the dirt film including greases and oils. This interaction of both differently manufactured and trained fibers creates a special effect. Due to its nature, this saw blade-like fiber has an enormously high capillary effect and thus high water absorption capacity, on the other hand releases this water only slowly: the smooth fiber, on the other hand, can absorb the torn dirt or grease film due to its capillary action and release it on contact with liquid to this saw-like fiber that transports him upwards (outside). The cause of this effect is not yet clear: it is assumed that, since the carrier material is impermeable to water and air and causes suction when water is released, the dirt is easily sucked upwards on the smooth fiber, so that an enormously large area is added can clean very low water consumption. This in turn has the consequence that the operating personnel rarely has to wash out the tensioning cloth, which leads to great relief.

According to a special embodiment, 50% cotton fibers can be present in the pile of the cleaning cloth, with 50% synthetic fibers. In general, thermoplastic fibers will be used both as smooth fibers and as sawtooth fibers.

FIG. 7 shows a double floor cloth, which according to the illustration can be provided with a long pile 56 and a short pile 58. The two floras can also be the same and of the same nature.

The pockets 52 are formed and flanged as before. What is new is that a rubber band 54 is sewn into the pockets. The inner and outer seams are shown again with dashed lines. As before, the holder is inserted into the pockets 52.

As can be clearly seen in FIG. 7B, an intermediate layer between the upper and lower pile, which is designated by 60, is provided.

In a further development of the invention, as perhaps better illustrated in FIG. 7C, a cleaning cloth is provided at the top and one at the bottom and sewn over the intermediate layer 60. The elastic band 54 can be sewn against the upper pile with one folded edge, as shown at 54, and sewn with the other edge against the fixed pile. At this point the elastic band is needled in particular through the upper pile, through the lower pile, through the back and through the intermediate layer.

The rubber band can consist of two layers, an inner shorter layer and an outer longer layer, as shown, so that there is a gradually increasing tightness. The arrows illustrate the insertion of the holder H.

Claims (13)

1. Cleaning cloth for stretching onto a wiper frame intendend for such a cleaning cloth, with pockets for receiving the opposite stretching bow ends (S), having a bead (18) which extends along the longitudinal sides of the cleaning cloth and lies to the outside relative to a seam (16) parallel to the cloth and having a bead (20) which lies to the inside relative to the seam that seam (16) forming a tilting articulation for both beads.
2. The cleaning cloth as claimed in claim 1, characterized in that the cleaning cloth (10) is turned back on itself (12, 14, 10) at least twice at the edge and stitched, the resulting outer bead (18) being at least three-layered, and the resulting inner bead (20) being at least two-layered.
3. The cleaning cloth as claimed in either of the preceding claims, characterized in that the material of the cleaning cloth is a single material and consists of cloth of natural origin with pile.
4. The cleaning cloth as claimed in one of claims 1 to 3, characterized in that the inner bead (20) is the inner spar, acted on by the stretching bow frame (S), of the tilting arrangement (18; 20).
5. The cleaning cloth as claimed in one of the preceding claims, characterized in that the width of inner bead (20) and/or outer bead (18) amounts to approximately 2 cm relative to the seam (16).
6. The cleaning cloth as claimed in one of the preceding claims, characterized by a knitted support material with a pile which is secured thereon and consists of smooth fibers, to each one of which there is closely associated a sawtooth-shaped fiber.
7. The cleaning cloth as claimed in claim 6, characterized in that 50% of the sawtooth-shaped fibers are welded in each case to a smooth fiber, wherein some of the fibers consist of cotton.
8. The cleaning cloth as claimed in claim 1, characterized by a spacer (60) on one side of which, for example the upper side, there is a long pile (56), and on the other side of which, for example the underside, there is a short pile (58).
9. The cleaning cloth as claimed in claim 1, characterized by that a band of elastic material such as rubber (54) is sewn into the pockets (52).
10. The cleaning cloth as claimed in claim 9, characterized in that a turned-back end of the rubber band (54) is stitched on the round body, for example of the long pile, and the other end is stitched through the spacer (60) to the second pile side (58).
11. The cleaning cloth as claimed in claim 9 or 10, characterized in that a two-layer rubber band is sewn in, the inner layer being shorter than the outer layer.
12. The cleaning cloth as claimed in claim 1, characterized in that two such floor cloths are secured with their backs towards each other and with a spacer between them, wherein both floor cloths possibly have different properties.
13. Cleaning cloth for stretching onto a wiper frame intended for such a cleaning cloth, with pockets for receiving the opposite stretching bow ends (S), having a bead which extends along the longitudinal sides of the cleaning cloth and lies to the outside relative to a seam (16) parallel to the cloth characterized in that the outer bead (32, 34) consists of a needled and/or stiffened part protruding vertically downward (34), and if appropriate additionally upward, from the horizontal plane of the cleaning cloth (Figure 4; 5).

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