Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C7/00—Paperhanging
  • B44C7/02—Machines, apparatus, tools or accessories therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
  • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
  • B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
  • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements

Definitions

• the invention relates to a portable device for moistening a prepasted wallcovering with a layer of water-activatable adhesive and to a method of moistening using such a portable device.
• the Applicant currently offers a range of wall coverings based on glass fibres, one side of which is coated with an adhesive that can be activated by water, that is to say an adhesive which is not sticky in the dry state. but whose adhesive character is activated when it is brought into contact with a sufficient quantity of water.
• the Applicant also offers a portable machine dedicated to the easy humidification of these pre-glued wall coverings (EasyGlue® technology). This portable machine has a gutter in which a support roller is fixed. When the operator wishes to use the machine, he fills the gutter with water so as to at least partially immerse the holding roller.
• the tape is cut and applied to the backing.
• the cut must be made upstream of the gutter filled with water so as not to leave the adhesive too long in contact with the water in this reservoir. The correct use of this known wetting machine thus implies that with each new strip, the operator causes the wall covering to slide under the holding roller in the gutter filled with water.
• the purpose of the present application is to propose a portable humidification machine which prohibits an incorrect mode of operation, as described above, where part of the prepasted wallcovering stays for too long in water.
• the idea underlying the present invention is to pass the strip of prepasted wallcovering over a cylinder, hereinafter called "presenting cylinder", the rotation of which automatically triggers the projection of water by a projection device of water, on the pre-glued side of the tape.
• This spraying of water stops automatically as soon as the movement of the presenting cylinder stops so as to guarantee that, when the machine is at rest, i.e. when the operator has extracted a moistened strip from a desired length and is busy applying it to the substrate, no area of the glued face of the wallcovering strip is in prolonged contact with the water in the tank. Thanks to the design of this new machine, all areas of the glued face of the wallcovering thus receive approximately the same amount of water.
• the operator exerts a simple manual traction on the strip of wall covering and recovers, at the outlet of the device, a uniformly moistened strip, even if he lets several tens of minutes between two lengths of wallcovering.
• the new device does not offer any other inappropriate mode of operation likely to lead to problems of adhesion of the wall covering to the support. Furthermore, the operator does not need to put his hands in the water tank between two successive lengths.
• Patent US1337729 discloses a device for gluing the back face of wallpaper.
• This device comprises a housing, a glue tank, a rotating brush which dips into the glue when the tank is filled, a rotating cylinder around which the wallpaper to be glued is rolled up.
• the brush and the cylinder are in contact with each other and rotate at the same speed in opposite directions.
• the application of the glue on the wallpaper is done by direct contact between the brush smeared with glue and the back side of the wallpaper.
• the device is designed so that the rotating cylinder and the rotating brush are parallel to each other and in contact with each other over their entire length.
• the present application relates more specifically to a portable device for moistening one side of a strip of prepasted wall covering, comprising
• connection means capable of connecting the presenting cylinder to the projection device in movement, so that the rotation of the presenting cylinder triggers the projection of water by the projection device and stopping the rotation of the presenting cylinder interrupts the projection of water by the projection device.
• the projection device is at a distance from the presenting cylinder so that the projection device is not in direct contact with the presenting cylinder.
• the device of the present invention is a portable device, that is to say its weight and its dimensions are such that two people, preferably a single adult person, are able to lift it and transport it from a place of use to another.
• Its weight is generally between about 10 and 40 kg, preferably between 15 and 35 kg.
• the device is preferably designed in such a way that some of its constituent elements, such as feet or other fastening elements, can be easily disassembled so as to reduce the external dimensions of the device.
• These removable elements are advantageously designed so that they can be housed in the housing of the device or fixed to the housing of the device.
• the device is advantageously free of electrical or electronic elements and also free of a motor.
• the setting in motion of the various elements necessary for the humidification of the strip of covering is the result of the traction force exerted by the operator on the end of the strip of wall covering engaged in the device of the present invention as described below.
• the largest dimension of the device, in the disassembled state, generally does not exceed 2.2 meters and is advantageously between 100 cm and 210 cm, preferably between 95 and 120 cm.
• the housing of the device has sufficient dimensions to be able to contain at least the presenter cylinder, the reservoir and the projection device, and preferably also the connection means. It is preferably made of a material that is both light and strong, for example plastic or metal, preferably aluminum.
• the box is preferably designed in such a way that it can be fixed on removable feet, so that its upper edge is at a suitable height for the operator, for example at a height from the ground of between 70 cm and 120 cm, preferably between 80 and 100 cm.
• the box is preferably open upwards, which allows the operator to follow the rotation of the presenter cylinder, the scrolling of the paper, possibly the projection of water by the projection device, to detect any disturbances and to remedy this thanks to easy access to the various mechanical elements. Furthermore, the filling of the water tank can thus be done easily from the top of the housing.
• the reservoir capable of containing water is advantageously located at the bottom of the case. It may form an integral part of the casing or else have the form of a separate container, removably installed in the casing in particular to facilitate cleaning thereof.
• the reservoir is preferably at least partially open at the top so that the projection device can draw water therefrom.
• At least one dimension of the reservoir is greater than or equal to the width of the strip of prepasted wallcovering, that is to say greater than approximately 100 cm, preferably between more than 100 cm and 210 cm, in particular between 102 and 120 cm.
• the reservoir is located at the bottom of the housing and, when it is filled with water, the projection device is partially immersed therein.
• the tank advantageously comprises a drain orifice which allows the water contained in the tank to flow out without it being necessary to overturn or tilt the device.
• the reservoir comprises means for indicating the level of the water contained in the reservoir, such as a gauge or even graduations (Min; Max) so as to allow a simple and rapid visual check of the water level.
• the presenting cylinder is an essential element of the device of the present invention. It is fixed to the case in such a way that it can rotate freely around its axis of revolution. This rotation is a passive rotation, i.e. the presentation cylinder rotates when the wall covering, with which it is in contact, scrolls under the effect of the pulling force exerted by the operator.
• the device of the present invention comprises a set of fixed guide means, capable of guiding the strip of pre-pasted wall covering inside the box, so that the non-pre-pasted face of the covering wall either in contact with the presenting cylinder and its pre-glued face or opposite, at a distance, from the water projection device.
• These guide means are advantageously cylindrical bars having a smooth surface on which the strip of wall covering slides easily.
• the cylindrical bars are parallel to the axes of revolution of the presenting cylinder and of the projection device.
• the coefficient of static friction (or coefficient of adhesion) between the non-glued side of the strip of prepasted wallcovering and the surface of the presenter cylinder must be high enough to prevent any slipping of these surfaces relative to each other. other. Indeed, if the wallcovering slipped during operation on the surface of the cylinder, this would lead to a reduction, or even an interruption, of the projection of water by the projection device and insufficient or irregular wetting of the activatable adhesive layer. by water.
• the presenter roller is advantageously made of rubber or it has a rubber coating or rubber elements on its surface. It is not necessary that the entire surface of the presenter roll that may come into contact with the wallcovering strip is made of rubber. However, in a preferred embodiment of the presenting cylinder at least 50%, in particular at least 70% and ideally more than 90% of the surface of the presenting cylinder capable of coming into contact with the strip of wall covering is made of rubber.
• the route of the strip of pre-pasted wall covering in the case of the device is such that it is its non-pre-pasted side which comes into contact with the surface of the presenting cylinder.
• the presenter cylinder thus presents the glued side of the wallcovering strip to the nearby water spray device.
• the portable device comprises an unwinding measurer, that is to say a system capable of measuring the length of the strip of wall covering associated with a display means in order to inform the operator thereof.
• the water projection device is preferably a rotary device capable - thanks to the centrifugal force generated by its rotation - of projecting water towards the presenting cylinder.
• the projection device is located at a distance from the presenting cylinder, in other words the projection device is not in direct contact with the presenting cylinder, nor with the pre-pasted face of the strip of wall covering.
• the projection distance is determined to allow the projection of the water, previously drawn, towards the presenting cylinder, towards the pre-glued face of the wall covering strip.
• the absence of direct contact also allows the projection device to rotate faster than the presenting cylinder and thus ensures, among other things, the projection of a sufficient quantity of water.
• the appropriate throwing distance between the outer casing of the throwing device and the surface of the presenting cylinder depends on various parameters, for example the embodiment of the throwing device (porous structure, fibrous structure, blades), the amount of water required and the ratio of the respective speeds of rotation of the projection device and of the presenter cylinder.
• This projection distance is for example between 0.5 cm and 15 cm, preferably between 1 cm and 10 cm, more preferably between 2 and 5 cm.
• the configuration of the projection device determines the volume of water likely to be drawn and then projected, that is to say the quantity of water intended to moisten the prepasted face of the strip of wall covering.
• the water spray device is a straight cylinder, fixed by its two ends to the housing so as to be able to rotate freely around its axis of revolution.
• This rotating cylinder has on its surface a draw-off means capable of being reversibly loaded with water when it comes into contact with the water present in the reservoir.
• the water projection device is therefore located in the housing so as to be partially immersed in the water present in the tank.
• the projection device “draws” the water there, that is to say cavities in the drawing-off means fill with water and drive the water in the direction of rotation.
• the generated centrifugal force projects the water drawn towards the prepasted face of the strip of wall covering which runs in the immediate vicinity, generally between a fixed guide means and the presenter cylinder.
• the drawing-off means may consist for example of a plurality of blades. These vanes can extend over the entire length of the rotary drawing means and define gutters, or they can have the shape of spoons and be distributed circumferentially in a regular manner over the entire surface of the rotary projection device.
• the vanes forming the drawing device of the projection device are configured to draw water from the tank and, under the action of centrifugal force, then project it towards the presenting cylinder and in doing so on the pre-pasted face of the wall covering.
• the blades are not straight, that is to say they do not extend radially in a rectilinear manner.
• the blades are advantageously configured to draw the water but also to keep it during the rotation until the water projection carried out selectively when the presenting cylinder and therefore the pre-glued face of the strip of wall covering to be moistened is opposite. opposite to receive the projected water under the effect of centrifugal force.
• the blades include a free end configured to form a deflector which facilitates the drawing of water from the reservoir of the device and therefore the filling of the volume of the cavity or cavities delimited by the blades.
• the deflector prevents the projection of water from occurring radially under the effect of centrifugal force during the rotation between the drawing from the reservoir and the projection of the water towards the pre-glued face of the strip of wall covering.
• the deflector is configured to orient, to direct, the water projected in the direction of the presenter cylinder and the strip of wall covering facing each other.
• the drawing means may comprise a porous and/or fibrous structure at its surface or be made up of such a porous and/or fibrous structure. The water is then drawn for example by capillarity in the reservoir and projected under the effect of centrifugal force towards the wall covering.
• the axis of revolution of the presenting cylinder is preferably parallel to the axis of revolution of the projection device.
• the presenting cylinder and the rotating water jetting device rotate in the same direction. They are mechanically connected to each other by a connecting means.
• This connection means comprises for example a belt adapted to transmit the rotary movement of the presenter cylinder to the projection device.
• the connection means is preferably a drive system comprising a drive pulley, integral with the presenting cylinder, a receiving pulley, integral with the water spray device, and a transmission belt. The pulleys and the belt are preferably notched.
• the ratio of the angular velocities of the presenting cylinder and of the projection device is determined by the transmission ratio of the connection means. More particularly the transmission ratio, defined as the ratio of the diameter of the drive pulley, integral with the presentation cylinder, to the diameter of the receiving pulley, integral with the projection device, is advantageously between 2 and 10, preferably between 2, 5 and 8, especially between 3 and 6.
• the quantity of water sprayed during operation by the spraying device onto the prepasted face of the wall covering is advantageously at least equal to 150 g/m 2 , preferably between 160 and 250 g/m 2 .
• the latter When the operator pulls on the strip of wall covering which is in adhesive contact with the surface of the presenting cylinder, the latter is set in rotation. This rotational movement triggers automatically, via the means connection, the rotational movement of the projection device partially immersed in the water present in the tank.
• the rotation of the projection device generates sufficient centrifugal force to project the water drawn in the direction of the presenter cylinder and the wall covering which passes close to the projection device.
• the projected water moistens the prepasted surface of the wallcovering tape. Given that it is difficult to precisely control the quantity of water necessary for sufficient wetting of the glued side, the excess water sprayed on the glued side will flow by gravity towards the bottom of the case.
• the device of the present invention is advantageously designed so that water flowing by gravity from the presenting cylinder and/or from the strip of wall covering is collected in the reservoir. This water recycling advantageously reduces the amount of water consumed and the frequency of filling the reservoir.
• the device of the present invention advantageously comprises an unwinding device capable of receiving a roll of pre-pasted wallcovering to be moistened and allowing the latter to unwind freely.
• This device must be protected from the humidity present in the case and is therefore preferably located outside the latter, for example fixed to the outer surface of the case or to the feet of the device.
• the unwinder device is a simple bar, removably fixed to the outside of the casing, parallel to the axis of revolution of the presenting cylinder. This bar is designed to be inserted into the slot of the wallcovering roll and is long enough to protrude on either side of it. The ends of the bar protruding from the roller can then be installed on a fixing system.
• the unwinding device could also have the form of a gutter large enough to accommodate the roll of wall covering.
• the device of the present invention comprises a device for wiping the strip of moistened wall covering at the exit of housing.
• This wiping device is preferably formed of a fixed guide means, located downstream (in the direction of movement of the strip of wall covering) of the presenter cylinder, and of a support element resting against this guide means, for example by gravity or by virtue of a spring effect.
• the pressure exerted by the support element on the fixed guide means is such that it allows the passage of the moistened prepasted wallcovering strip between the guide means and the support element.
• the moistened glued face of the strip of wall covering is then in contact with the support element and the non-glued face with the guide element.
• the support element is for example a smooth plate pressing by gravity against the guide element and therefore against the moistened glued face of the wall covering.
• the device of the present invention may further comprise a plate fixed, preferably horizontally, to the outside of the box, said plate being capable of receiving the moistened prepasted wallcovering strip at the outlet of the box, in particular downstream of the wiping device.
• the operator can place the wet strip on this plate by folding it back on itself, wet side against wet side.
• the plate can also be used as a cutting surface. It may include, for example, a straight groove, perpendicular to the direction of movement of the wall covering strip, which allows the guidance of a cutting tool.
• the device of the present invention may also comprise a cutting device comprising a guided blade, which can be moved by the operator along a trajectory perpendicular to the direction of movement of the strip of wall covering.
• the plate has dimensions such that it can be used as a cover to close the case for storing or moving the device.
• the present application also relates to a process for moistening a strip of prepasted wallcovering using a portable device as described above.
• This method comprises at least the following steps consisting in
• the water projection device of the portable device according to the invention is at a distance from the presenting cylinder of the prepasted wallcovering strip so that said projection device is not in direct contact with the presenting cylinder and therefore not in contact with the prepasted side of the wallcovering to be moistened.
• FIG. 1 is a schematic cross-sectional view of a device according to the invention ready to be used, showing the housing and the various elements it contains;
• FIG. 2 is a perspective view of a device according to the invention.
• the box 1 is an open metal box at the bottom of which is provided a reservoir 2 filled with water.
• a presenting cylinder 3 configured to rotate freely around its axis of revolution 10 in the direction of the arrows A has a rubber coating 8 on its surface.
• a water projection device 4 comprising on its surface a drawing means 6 formed of a plurality of vanes is provided close to the presenting cylinder 3.
• the presenting cylinder 3 is arranged at a distance from the projection device 4 so that said projection device 4 and presenting cylinder 3 are not in direct contact, separated from each other by a determined projection distance, generally between 0.5 cm and 15 cm.
• the projection device 4 can also rotate freely around its axis of revolution 11 in the direction of the arrows B.
• the projection means 4 is driven in displacement (rotation) by the presenter cylinder 3 via a connection means 5 which makes it rotate in the direction of the arrows B, that is to say in the same direction as the presenter cylinder 3
• the connection means 5 comprises a drive pulley 5a, secured to the presenting cylinder 3, a receiving pulley 5b, secured to the projection means 4, and a belt 5c connecting the two pulleys 5a, 5b.
• An unwinder device 9 is fixed to the device outside the casing 1 .
• This unwinder device 9 is inserted into the opening of a wallcovering roll 20.
• the path of the wallcovering strip 20 in the box is determined by a set of fixed guide means 17a, 17b, 17c which guide the strip of wallcovering so that it is wrapped around the presenting cylinder 3, its non-prepasted face being in contact with the presenting cylinder 3 and its glued face facing the spraying device 4 of water.
• the operator exerts a pulling force on the strip of wall covering 20 in the direction of the arrow C
• the presenting cylinder 3 performs a rotational movement in the direction of the arrows A.
• connection means 5 the rotational movement of the presenting cylinder 3 is transmitted to the projection device 4 which performs a rotational movement identical to that of the presenting cylinder, but at a higher angular speed.
• the centrifugal force created by the rotation of the projection device 4 causes the projection of water, pulsed by the vanes of the drawing-off means 6, in the direction of the presenter cylinder 3 and the glued face of the wall covering 20.
• the presenter cylinder being at plumb with reservoir 2, any excess water possibly flowing from the strip of wall covering 20 is collected in reservoir 2.
• the excess water is in particular free to flow by gravity between presenting cylinder 3 and the projection device 4 arranged at a distance from each other and offset from each other.
• the strip of wet wallcovering 20 passes between a guide means 17c and a support element 12 which allows smoothing of the moistened glue.
• a plate 13 making it possible to receive the strip of wet wall covering 20 is fixed horizontally at the level of the upper edge of the casing 1 . This fixing can be done for example by means of hinges making it possible to fold the plate over the opening of the case and to use the plate 13 as the cover of the case with a view to transporting the device.
• Figure 2 shows the device of the invention as a whole in a ready-to-operate state.
• Four removable feet 18 support the box 1.
• the plate 13 is fixed horizontally to the upper edge of the box 1. It has dimensions making it possible to completely cover the opening of the box.
• Two handles 19 are provided at the upper edge of the case.
• the unwinder device 9 is fixed here on the removable feet 18 and not, as in FIG. 1, to the box. We see the three guide means 17a, 17b, 17c of the strip of wall covering as well as the support element 12 which rests freely on the guide means 17c.

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• Special Spraying Apparatus (AREA)
• Air Humidification (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=77821867

Family Applications (1)

Country Status (3)

Family Cites Families (4)

• 2021
  • 2021-07-05 FR FR2107242A patent/FR3124746B1/fr active Active
• 2022
  • 2022-06-28 WO PCT/FR2022/051289 patent/WO2023281185A1/fr active Application Filing
  • 2022-06-28 EP EP22747078.8A patent/EP4366955A1/de active Pending

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