CA1331089C - Masking method and masking means - Google Patents
Masking method and masking meansInfo
- Publication number
- CA1331089C CA1331089C CA000612212A CA612212A CA1331089C CA 1331089 C CA1331089 C CA 1331089C CA 000612212 A CA000612212 A CA 000612212A CA 612212 A CA612212 A CA 612212A CA 1331089 C CA1331089 C CA 1331089C
- Authority
- CA
- Canada
- Prior art keywords
- cushion
- irregularity
- masking
- masking means
- treated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/26—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/26—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities
- B05B12/265—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities between a door and a post, e.g. foam strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/24—Masking elements, i.e. elements defining uncoated areas on an object to be coated made at least partly of flexible material, e.g. sheets of paper or fabric
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
- Developing Agents For Electrophotography (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Materials For Medical Uses (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Liquid Crystal (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
"Masking method and masking means"
Abstract A method and means for masking at least a part of a surface to be treated wherein an element that is resistant to surface treatment operations is removably applied to said part of said surface and is removed after finishing said treatment. As element a compressible cushion is applied on at least a portion of an irregularity in said sur-face wherein said cushion is adaptable to the irregularity on which it is applied.
Figure 1.
Abstract A method and means for masking at least a part of a surface to be treated wherein an element that is resistant to surface treatment operations is removably applied to said part of said surface and is removed after finishing said treatment. As element a compressible cushion is applied on at least a portion of an irregularity in said sur-face wherein said cushion is adaptable to the irregularity on which it is applied.
Figure 1.
Description
~`
1331089 ~
"MaskinR method and maskinR means"
The invention relates to a method for masking at least a part of a surface to be treated wherein an element that is resistant to surface treatment operations is removably applied to said part of said surface and is removed after finishing said treatment. The 5 invention also relates to a masking means, wherein said masking means is formed by a removable element which is resistant to surface treatments.
Such a masking method and masking means is known from the use of a masking tape, or from the use of a grooved panel of plastic foam as described in the European publi~he~ patent 10 0207720. These known methods are for example applied in priming and painting of vehicle coachwork, in particular automobile coachwork, or in refinishing work, sandblasting or other surface treatments. In order to prevent paint or other substances to be applied on a surface to be treated from penetrating or covering at least a part of the surface to be 15 treated, that part is masked by using an element that is resistant to surface treatment operations. The element is resistant to surface treatments operations and masks the surface during the treatment and is removed following the treatment.
A drawback of the grooved plastic foam panel is 20 that, due to its panel shape, it is primarily appropriate for masking a planar surface. In particular for surface treatment operation on the body of a vehicie it is not enough to mask only the planar surfaces, since the vehicle body shows a lot of irregularities. Those irregularities usually masked with protection paper and/or masking tape which is a 25 time-consuming operation, because it has to be performed very carefully.
Also these known masking methods do not always result in a satisfactory surface treatment. The dust left in the openings can cause contamination of the treated surface. Turbulences can occur around ', 1 33108~ ~
those openings or edges causing an uneven application of the substance to be applied on the surface to be treated.
An object of the invention is to miti8ate the above mentioned drawbacks.
According to the present invention a compressible cushion is applied as said element on at least a portion of an irregularity in said surface wherein said cushion is adaptable to said portion of said irregularity on which it is applied.
Due to the fact that the masking element is formed 10 by a compressible cushion, it is no longer necessary to use protection paper nor to apply several maskinE~ tape layers in order to mask an irregularity, thus providing a substantial time saving. The compressible cushion adapts itself for filling or covering surface irregularities such as openings or edges. Thus the cushion prevents the formation of 15 turbulences and so the contamination by dust originating from the openings, and enables an adequate masking of the irregularities.
The gist of the present invention is to use an adaptable compressible cushion as masking element in order to mask irregularities. Due to the fact that the cushion is adaptable to the 20 irregularity it takes the exact shape of the irregularity thus providing an excellent masking.
A masking means according to the invention is characterized in that said element is a compressible cushion which is adaptable to the irregularity to which it is applied.
Masking means having the shape of a particular irregularity are known and are for example described in the European published patent 0263637. However the difference between a masking means according to the present invention and the masking means according to the latter patent application is that the masking means 30 published EP 0263 637 have a particular preformed shape which is on beforehand completely adapted to the irregularity and can thus only be used for masking an irregularity of that particular shape. The masking mcans according to the present imention is not on beforehand adapted to a particular irregularity but adapts itself to the irregularity to which it is 35 applied. The masking means according to the present invention is thus : ' ' universally applicable to T~nv kir~ls of irregularities while the masking accord-ing to published EP No 2263637 is not universally applicable.
One should not confuse a masking ~asket with a conventional sealing gasket. Indeed, in automobiles it is well known to 5 apply a sealing gasket on the innerlip of a door, hood or a trunk, in the frame of the door or in the other openings which preverIts inter alia water and noise from penetrating inside the vehicle. Those sealing gaskets are applied by the manufacturer of the car at a well-defined place and are generally manufactured for each particular automobile 10 model. Those sealin~ gaskets are quasi-permanently fixed in place. On the other hand, a masking gasket according to the invention only serves for masking, as its name indicates, and not for permanent sealing purposes.
The use of a thermoplastic foam for masking purposes is described in the U.S. patent 4,714,633. That patent describes the use of an expending and shrinking thermoplastic foam member that contains a cavity. During the surface treatment operation or when the member is heated afterwards, the member according to the U.S. patent will change its form in order to be separated in a natural way of the 20 article on which it has been fixed. On the other hand, the masking means of the inveneion resists surface treatment~operation, i.e. its original configuration will not modify under influence of the surface treatment, unlike the member described in the patent. Contrary to the masking means according to that patent, the masking means according to the 25 invention need not include a cavity which enables a separation operation.
The member according to the cited U.S. patent is clearly used in surface treatment operations where its extending and shrinking properties are essential, while the masking means according to the invention is applied in surface treatment operations where its resis~ance to the treatment ~ 3û plays an important ro'e.
`~ The invention thus provides a non-evident application of a masking means. Indeed, the idea of using a cushion is not evident with respect to the well known use of masking tapes. Several solutions such as pre-treatment of surfaces (see for example the Japanese publica-3S tions Nos 8S021787 or 81211929 have already been tested out in order ` 133~089 ~;
.
to reduce secondary effects due to the masking during surface treatment operations. The use of a masking means according to the present invention not only enables a substantial time saving but also a quality improvement without use of pre-treatment operations or the like.
5A first preferred embodiment of a masking means according to the invention is characterized in that said cushion is an elongated cushion. The elongated cushion offers the advantage that it can be applied in one piece over the whole length of the irregularity to be masked, thus avoiding connection parts which coul cause turbulences 10having a negative influence on the achievement quality.
Prefarably that said cushion has substantially the same cross section over its whole length. This enables a uniform masking.
A first preferred embodiment of a masking method 15according to the invention is characterized in that said cushion is applied to an elongated irregularity. Elongated irregularities are usual in vehicles. The cushion according to the invention enables an excellent masking of such irregularities in vehicles.
In a second preferred embodiment of a method 20according to the invention said cushion is positionably adhered on said part of said irregularity. This enables accurate positioning of the cushion when it has incorrectly been applied.
The invention also relates to a device for applying the masking means according to the invention. The device according to 25the invention is characterized in that it comprises a drum for unwinding said cushion.
In another preferred embodiment a method according to the invention is characterized in that said cushion is formed by applying to said part of said irregularity a polymerizing foam 30comprising at least a reactive substance. That method is for example applied for masking parts which are difficult to access and thus provides an easy application of the foam on the irregularity to be masked.
A second preferred embodiment of a masking means according to the invention is characterized in that said masking means 35comprise an elastic foam cushion which is provided with a pressure ~331089 .... . .
sensitive adhesive layer, which covers at least a part of said cushion.
The cushion can thus easily be applied on the irregularity by simply adhering the cushion thereon.
Preferably said cushion is hollow. this enables 5 saving of material and also gives more flexibility to the cushion.
Preferably said cushion is wound in a coil. This offers an adequate packing for the masking means.
The invention will now be described more in details by means of examples illustrated in the drawing in which:
figure I illustrates a first preferred embodiment of a masking means according to the invention;
figure 2 illustrates a second preferred embodiment of a masking means according to the invention;
figure 3 illustrates the result of a method according 15 to the invention when applied on the open door of an automobile ;
figure 4 illustrates a cross-section of a masking means according to the invention applied on an automobile;
figure 5 illustrates an example of a device for applying a masking means according to the invention;
figure 6 illustrates a masking means according to the invention which masking means is wound on a coil and packed in a box.
On the different figures corresponding elements are referred to with the same reference numerals. It will be veident that the invention is not limited to the described embodiments and that within the scope of the invention different embodiments are possible.
In the example shown in figure 1, the masking means according to the invention is formed by a cushion I which is cylindrically shaped and elongated. The cushion is a compressible cushion preferably made out of an absorbing material. The cushion I is at least partially provided with a pressure sensitive adhesive layer formed by an self adhesive film. that adhesive layer enables the fixing of the cushion and also the easy removing thereof after the surface treatment has been accomplished.
- : ~ 3 3 1 0 8 9 ': ~, - ' . :' Preferably the cushion 1 is an elastic foam cushion which is made of a material resistant to surface treatment operations.
The foam thus for example resists high temperatures of a spraying cabin for automobiles, to solvents and humidity. The materiaJ used for manufacturing the cushion is preferably a synthetic material such as for example polypropylene, neoprene, polyester, polyurethane or acrylic. It will be evident that other materials, elastic or not, synthetic or natural, which resist surface treatment operations can also be used. The adhesive layer 2 is for example formed by an adhesive based on rubber, resin, acrylic, or other suitable material, having an immediate tack. If necessary, the cushion could be provided with a repositionable adhesive layer, which should be resistant to solvents and changes in temperature.
The cushion can have different cross-sections, for example it can have a diameter within a range of 5 to 50 mm, and is preferably presented rolled up. The cushion can also have a rectangular cross-section, such as shown in figure 2 or a cross-section of any other geomatrical form, such as for example triangular or trapezoidal.
Preferably the cushion has substantially the same cross-section over it whole length.
This cushion can be either solid or hollow, such as for example illustrated in dotted line in figure 1. A hollow cushion improves the elasticity of the masking means while saving material.
The adhesive layer 2 can be covered by a liner 3, which is rem~ved before the masking means is applied. The adhesive layer can also be applied to the whole or to a substantial portion of the exposed portion of the cushion, for example when a rectangular cushion is used such as illustrated in figure 2, the adhesive layer can be applied to two or more sides of the cushion thus enabling a better and/or easier application of the cushion.
The adhesive substance is preferably self-sticking, thus forming with the foam a self-sticking assemblage realized either by a pressure sensitlve adhesive film which at least partially covers the cushion, such as illustrated in figures I and 2, or by manufacturing a cushion from a foam which itself is tacky. In the latter case, the ioam can be completely covered by a protection liner. A foam which is 1331~89 provided with a pressure sensitive adhesive is particularly advantageous for appliations on vehicle body reparing. Indeed, the surface to be masked can sometimes impose multiple contorsions upon the cushion.
When the foam is provided with an adhesive layer, one can reliably obtain a satisfying adhesion, notwithstanding the geometric form of the irregularity to be masked.
However the cushion I can also be fixed on the irregularity which has to be masked by other means, which are not necessarily self-sticking. For example it is possible to use a cushion which is not self-sticking and to first spray an adhesive on the surface on which the cushion has to be applied, and thereafter stick the cushion on the applied adhesive.
In another embodiment of the masking method, the elastic foam cushion is formed by applying on the surface, which has to be masked, a polymerising foam made from a suitable reactive substance or substances. That reactive substance is for example stored in an aerosol container and is prayed on the surface to be masked. This enables a masking of places which are otherwise difficult to access for applying thereon a masking cushion.
The figures 3 and 4 illustrate the masking according to the invention as applied to the door of an automobile. Suppose that the external surface 11 of a door 4 has to be painted by spraying. In order to prevent paint from penetrating into a crevice or opening between the door and the surrounding parts of the coachwork and adherin8 to the sealing gasket, or weatherstrip 12, it is necessary to mask the opening. therefore the cushion 1 according to the invention is applied for example by means of its adhesive layer, on the border of the lip of the door 4, of the side 5 of the door, and on all the other portions ~, which represent an irregularity with respect to the surface of the door such as the border lines of the windows, bottom of the car body, the Iatches of the doors and other surrounding surfaces, that do not need to be treated. By closing the door, a pressure will be applied to the cushion. due to the fact that the cushion is compressible, it will be lightly compressed thereby adapting itself to the portion or the whole irregularity on which it is applied and sealing the opening or at least ~331089 partially filling or bridging the surface irregularity. When the paint is applied to the door, the cushion will, on the one hand, prevent the paint from penetrating in the opening by absorbing that paint and, on the other hand, due to the fact that the cushion obstructs the opening or fills at 5 least partially the irregularity, the effects due to turbulences in and around the openings are practically eliminated and will not affect the achievement of a satisfactory surface treatment. Also due to the fact that the openings are obstructed, residues of dust, humidity and others, which remain in the openings will remain enclosed therein and will no 10 longer be affected by the pressure of compressed air and will thus no longer affect the achievement of a satisfactory surface treatment.
When the surface treatment operation is finished, the cushion is removed from the parts on which it has been applied. the substances used for the surface treatment can not reach and thus will not 15 affect the protected surface irregularities. This is particularly the case when using an absorbing material for the cushion and which also absorbs ar~ liquid substances used for the surface treatment. Due to the absorption capacity of the cushion, traces along the border forming the transition between the cushion which has hust been removed and the 20 treated surface can no longer be seen. Indeed, the substance used for the surface treatment and which is applied either on the cushion or on the border between the cushion and the treated surface is now been absorbed by the cushion.
The cushion can also be applied on portions of the 25 surface which are not damaged, or which are made from a different material as the one used for the door to be treated, such as for example the brightwork surrounding the windows.
The method according to the invention is very appropriate for application on modern vehicles having a low Cx value (in 30 the order of 0.30; Cx = air penetration coefficient). Indeed for aerodynamical reasons some sealing gaskets are applied very close to the openings. Due to its compressibility and elasticity the cushion according to the invention allows simultaneously masking of the sealing gaskets and the opening which remains between the sealing gaskets and the 3S coachwork. .
331089 ~ -As shown in the figures 1 and 2 the cushion is an elongated cushion. Such an elongated cushion is particularly suitable to be applied on an elongated irregularity such as for example a crevise between a door, a hood or a hatch and the vehicle body. Since the 5 cushion is elongated it can be applied practically in one piece over the whole length of the elongated irregularity, thus avoiding openings between cushion parts which could cause turbulances during the surface treatment or penetration of paint and the like between those cushionparts. Further due to the fact that the cushion is compressible 10 and elastic it can easily be bent in all kind of corners shown by the irregularity to be masked, which offers a continuous masking. Also due to the fact that the cushion is made of elastic foam its thickness can easily be zdapted to the depth of the irregularity by simply stretching or compressing in length the elongated cushion.
Another advantage of the cushion according to the invention is that it is repositionable which offers the possibility to reposition the cushion when it has incorrectly be applied on the irregularity to be masked.
The cushion can be directly fixed to the metal body 20 of the car or be superposed on the sealing gasket. Indeed, the adhesive characteristics of the masking gasket according to the invention allows the cushion to be applied as well on metal, rubber, as to any other materials, such as for example plastics. It is also possible to remove first the sealing gasket of the vehicle and then to masks the opening thus 25 formed using a cushion according to the invention.
Due to the easy application and the technical characteristics of the cushion a substantial time saving of nearly two thirds of the time required for the conventional masking of a vehicle door opening using the masking tape method can be gained and thus a 30 substantial economy realized.
The masking means according to the invention can be applied either by hand or by means of a device such as shown in figure 5. The device comprises a drum or core on which the cushion is wrapped. The device is provided with an handle 7 and with three rollers 35 8, 9 and 10. The cushion 1 passes between the rollers 8 and 9. By ."''-'' ~..
.: '" ' '~
'. ~ . ~ '~ '' 1331089 ~ :
, o pressing the roller 8 against the surface to be masked, the rolling of the latter will engage the roller 9 which on its turn will cause the cushion to unwind from the drum 6. When the cushion comprises a protective liner covering the adhesive substance, that protective liner 3 passes between the rollers 9 and 10. The engagement of the rollers 9 and 10 will cause the detachement and the removal of the protection liner when the cushion is applied on the surface to be masked.
The device can also be provided with a further roller on which the protective liner is rolled after it has been remoed from the cushuin. The device enables an easy and quick application of the cushion on the surface to be masked.
Figure 6 illustrates a packing box 14 comprising a masking means according to the invention. The packing box 14 is provided with a central opening 1 6 through which the cushion is pulled out. The cushion is wound on a coil 15 in the same fashion as electrical wire often is marketed. This way of packing offers the advantage that the cushion is suitably protected when it is inside the box, that it remains coiled and that it can easily be pulled out of the box which during the application of the masking means can simply rest on the floor.
It is also possible to fix the device on a robot arm in which the trajectory along which the cushion has to ba applied on the irregularity to be masked is loaded into the arm's memory.
It will be clear that the invention is not only applicable on automobiles but can also be applied on all kind of surface treatment operations such as for example the painting of the frame of a window of a home or cleaning at high pressure.
30 "
1331089 ~
"MaskinR method and maskinR means"
The invention relates to a method for masking at least a part of a surface to be treated wherein an element that is resistant to surface treatment operations is removably applied to said part of said surface and is removed after finishing said treatment. The 5 invention also relates to a masking means, wherein said masking means is formed by a removable element which is resistant to surface treatments.
Such a masking method and masking means is known from the use of a masking tape, or from the use of a grooved panel of plastic foam as described in the European publi~he~ patent 10 0207720. These known methods are for example applied in priming and painting of vehicle coachwork, in particular automobile coachwork, or in refinishing work, sandblasting or other surface treatments. In order to prevent paint or other substances to be applied on a surface to be treated from penetrating or covering at least a part of the surface to be 15 treated, that part is masked by using an element that is resistant to surface treatment operations. The element is resistant to surface treatments operations and masks the surface during the treatment and is removed following the treatment.
A drawback of the grooved plastic foam panel is 20 that, due to its panel shape, it is primarily appropriate for masking a planar surface. In particular for surface treatment operation on the body of a vehicie it is not enough to mask only the planar surfaces, since the vehicle body shows a lot of irregularities. Those irregularities usually masked with protection paper and/or masking tape which is a 25 time-consuming operation, because it has to be performed very carefully.
Also these known masking methods do not always result in a satisfactory surface treatment. The dust left in the openings can cause contamination of the treated surface. Turbulences can occur around ', 1 33108~ ~
those openings or edges causing an uneven application of the substance to be applied on the surface to be treated.
An object of the invention is to miti8ate the above mentioned drawbacks.
According to the present invention a compressible cushion is applied as said element on at least a portion of an irregularity in said surface wherein said cushion is adaptable to said portion of said irregularity on which it is applied.
Due to the fact that the masking element is formed 10 by a compressible cushion, it is no longer necessary to use protection paper nor to apply several maskinE~ tape layers in order to mask an irregularity, thus providing a substantial time saving. The compressible cushion adapts itself for filling or covering surface irregularities such as openings or edges. Thus the cushion prevents the formation of 15 turbulences and so the contamination by dust originating from the openings, and enables an adequate masking of the irregularities.
The gist of the present invention is to use an adaptable compressible cushion as masking element in order to mask irregularities. Due to the fact that the cushion is adaptable to the 20 irregularity it takes the exact shape of the irregularity thus providing an excellent masking.
A masking means according to the invention is characterized in that said element is a compressible cushion which is adaptable to the irregularity to which it is applied.
Masking means having the shape of a particular irregularity are known and are for example described in the European published patent 0263637. However the difference between a masking means according to the present invention and the masking means according to the latter patent application is that the masking means 30 published EP 0263 637 have a particular preformed shape which is on beforehand completely adapted to the irregularity and can thus only be used for masking an irregularity of that particular shape. The masking mcans according to the present imention is not on beforehand adapted to a particular irregularity but adapts itself to the irregularity to which it is 35 applied. The masking means according to the present invention is thus : ' ' universally applicable to T~nv kir~ls of irregularities while the masking accord-ing to published EP No 2263637 is not universally applicable.
One should not confuse a masking ~asket with a conventional sealing gasket. Indeed, in automobiles it is well known to 5 apply a sealing gasket on the innerlip of a door, hood or a trunk, in the frame of the door or in the other openings which preverIts inter alia water and noise from penetrating inside the vehicle. Those sealing gaskets are applied by the manufacturer of the car at a well-defined place and are generally manufactured for each particular automobile 10 model. Those sealin~ gaskets are quasi-permanently fixed in place. On the other hand, a masking gasket according to the invention only serves for masking, as its name indicates, and not for permanent sealing purposes.
The use of a thermoplastic foam for masking purposes is described in the U.S. patent 4,714,633. That patent describes the use of an expending and shrinking thermoplastic foam member that contains a cavity. During the surface treatment operation or when the member is heated afterwards, the member according to the U.S. patent will change its form in order to be separated in a natural way of the 20 article on which it has been fixed. On the other hand, the masking means of the inveneion resists surface treatment~operation, i.e. its original configuration will not modify under influence of the surface treatment, unlike the member described in the patent. Contrary to the masking means according to that patent, the masking means according to the 25 invention need not include a cavity which enables a separation operation.
The member according to the cited U.S. patent is clearly used in surface treatment operations where its extending and shrinking properties are essential, while the masking means according to the invention is applied in surface treatment operations where its resis~ance to the treatment ~ 3û plays an important ro'e.
`~ The invention thus provides a non-evident application of a masking means. Indeed, the idea of using a cushion is not evident with respect to the well known use of masking tapes. Several solutions such as pre-treatment of surfaces (see for example the Japanese publica-3S tions Nos 8S021787 or 81211929 have already been tested out in order ` 133~089 ~;
.
to reduce secondary effects due to the masking during surface treatment operations. The use of a masking means according to the present invention not only enables a substantial time saving but also a quality improvement without use of pre-treatment operations or the like.
5A first preferred embodiment of a masking means according to the invention is characterized in that said cushion is an elongated cushion. The elongated cushion offers the advantage that it can be applied in one piece over the whole length of the irregularity to be masked, thus avoiding connection parts which coul cause turbulences 10having a negative influence on the achievement quality.
Prefarably that said cushion has substantially the same cross section over its whole length. This enables a uniform masking.
A first preferred embodiment of a masking method 15according to the invention is characterized in that said cushion is applied to an elongated irregularity. Elongated irregularities are usual in vehicles. The cushion according to the invention enables an excellent masking of such irregularities in vehicles.
In a second preferred embodiment of a method 20according to the invention said cushion is positionably adhered on said part of said irregularity. This enables accurate positioning of the cushion when it has incorrectly been applied.
The invention also relates to a device for applying the masking means according to the invention. The device according to 25the invention is characterized in that it comprises a drum for unwinding said cushion.
In another preferred embodiment a method according to the invention is characterized in that said cushion is formed by applying to said part of said irregularity a polymerizing foam 30comprising at least a reactive substance. That method is for example applied for masking parts which are difficult to access and thus provides an easy application of the foam on the irregularity to be masked.
A second preferred embodiment of a masking means according to the invention is characterized in that said masking means 35comprise an elastic foam cushion which is provided with a pressure ~331089 .... . .
sensitive adhesive layer, which covers at least a part of said cushion.
The cushion can thus easily be applied on the irregularity by simply adhering the cushion thereon.
Preferably said cushion is hollow. this enables 5 saving of material and also gives more flexibility to the cushion.
Preferably said cushion is wound in a coil. This offers an adequate packing for the masking means.
The invention will now be described more in details by means of examples illustrated in the drawing in which:
figure I illustrates a first preferred embodiment of a masking means according to the invention;
figure 2 illustrates a second preferred embodiment of a masking means according to the invention;
figure 3 illustrates the result of a method according 15 to the invention when applied on the open door of an automobile ;
figure 4 illustrates a cross-section of a masking means according to the invention applied on an automobile;
figure 5 illustrates an example of a device for applying a masking means according to the invention;
figure 6 illustrates a masking means according to the invention which masking means is wound on a coil and packed in a box.
On the different figures corresponding elements are referred to with the same reference numerals. It will be veident that the invention is not limited to the described embodiments and that within the scope of the invention different embodiments are possible.
In the example shown in figure 1, the masking means according to the invention is formed by a cushion I which is cylindrically shaped and elongated. The cushion is a compressible cushion preferably made out of an absorbing material. The cushion I is at least partially provided with a pressure sensitive adhesive layer formed by an self adhesive film. that adhesive layer enables the fixing of the cushion and also the easy removing thereof after the surface treatment has been accomplished.
- : ~ 3 3 1 0 8 9 ': ~, - ' . :' Preferably the cushion 1 is an elastic foam cushion which is made of a material resistant to surface treatment operations.
The foam thus for example resists high temperatures of a spraying cabin for automobiles, to solvents and humidity. The materiaJ used for manufacturing the cushion is preferably a synthetic material such as for example polypropylene, neoprene, polyester, polyurethane or acrylic. It will be evident that other materials, elastic or not, synthetic or natural, which resist surface treatment operations can also be used. The adhesive layer 2 is for example formed by an adhesive based on rubber, resin, acrylic, or other suitable material, having an immediate tack. If necessary, the cushion could be provided with a repositionable adhesive layer, which should be resistant to solvents and changes in temperature.
The cushion can have different cross-sections, for example it can have a diameter within a range of 5 to 50 mm, and is preferably presented rolled up. The cushion can also have a rectangular cross-section, such as shown in figure 2 or a cross-section of any other geomatrical form, such as for example triangular or trapezoidal.
Preferably the cushion has substantially the same cross-section over it whole length.
This cushion can be either solid or hollow, such as for example illustrated in dotted line in figure 1. A hollow cushion improves the elasticity of the masking means while saving material.
The adhesive layer 2 can be covered by a liner 3, which is rem~ved before the masking means is applied. The adhesive layer can also be applied to the whole or to a substantial portion of the exposed portion of the cushion, for example when a rectangular cushion is used such as illustrated in figure 2, the adhesive layer can be applied to two or more sides of the cushion thus enabling a better and/or easier application of the cushion.
The adhesive substance is preferably self-sticking, thus forming with the foam a self-sticking assemblage realized either by a pressure sensitlve adhesive film which at least partially covers the cushion, such as illustrated in figures I and 2, or by manufacturing a cushion from a foam which itself is tacky. In the latter case, the ioam can be completely covered by a protection liner. A foam which is 1331~89 provided with a pressure sensitive adhesive is particularly advantageous for appliations on vehicle body reparing. Indeed, the surface to be masked can sometimes impose multiple contorsions upon the cushion.
When the foam is provided with an adhesive layer, one can reliably obtain a satisfying adhesion, notwithstanding the geometric form of the irregularity to be masked.
However the cushion I can also be fixed on the irregularity which has to be masked by other means, which are not necessarily self-sticking. For example it is possible to use a cushion which is not self-sticking and to first spray an adhesive on the surface on which the cushion has to be applied, and thereafter stick the cushion on the applied adhesive.
In another embodiment of the masking method, the elastic foam cushion is formed by applying on the surface, which has to be masked, a polymerising foam made from a suitable reactive substance or substances. That reactive substance is for example stored in an aerosol container and is prayed on the surface to be masked. This enables a masking of places which are otherwise difficult to access for applying thereon a masking cushion.
The figures 3 and 4 illustrate the masking according to the invention as applied to the door of an automobile. Suppose that the external surface 11 of a door 4 has to be painted by spraying. In order to prevent paint from penetrating into a crevice or opening between the door and the surrounding parts of the coachwork and adherin8 to the sealing gasket, or weatherstrip 12, it is necessary to mask the opening. therefore the cushion 1 according to the invention is applied for example by means of its adhesive layer, on the border of the lip of the door 4, of the side 5 of the door, and on all the other portions ~, which represent an irregularity with respect to the surface of the door such as the border lines of the windows, bottom of the car body, the Iatches of the doors and other surrounding surfaces, that do not need to be treated. By closing the door, a pressure will be applied to the cushion. due to the fact that the cushion is compressible, it will be lightly compressed thereby adapting itself to the portion or the whole irregularity on which it is applied and sealing the opening or at least ~331089 partially filling or bridging the surface irregularity. When the paint is applied to the door, the cushion will, on the one hand, prevent the paint from penetrating in the opening by absorbing that paint and, on the other hand, due to the fact that the cushion obstructs the opening or fills at 5 least partially the irregularity, the effects due to turbulences in and around the openings are practically eliminated and will not affect the achievement of a satisfactory surface treatment. Also due to the fact that the openings are obstructed, residues of dust, humidity and others, which remain in the openings will remain enclosed therein and will no 10 longer be affected by the pressure of compressed air and will thus no longer affect the achievement of a satisfactory surface treatment.
When the surface treatment operation is finished, the cushion is removed from the parts on which it has been applied. the substances used for the surface treatment can not reach and thus will not 15 affect the protected surface irregularities. This is particularly the case when using an absorbing material for the cushion and which also absorbs ar~ liquid substances used for the surface treatment. Due to the absorption capacity of the cushion, traces along the border forming the transition between the cushion which has hust been removed and the 20 treated surface can no longer be seen. Indeed, the substance used for the surface treatment and which is applied either on the cushion or on the border between the cushion and the treated surface is now been absorbed by the cushion.
The cushion can also be applied on portions of the 25 surface which are not damaged, or which are made from a different material as the one used for the door to be treated, such as for example the brightwork surrounding the windows.
The method according to the invention is very appropriate for application on modern vehicles having a low Cx value (in 30 the order of 0.30; Cx = air penetration coefficient). Indeed for aerodynamical reasons some sealing gaskets are applied very close to the openings. Due to its compressibility and elasticity the cushion according to the invention allows simultaneously masking of the sealing gaskets and the opening which remains between the sealing gaskets and the 3S coachwork. .
331089 ~ -As shown in the figures 1 and 2 the cushion is an elongated cushion. Such an elongated cushion is particularly suitable to be applied on an elongated irregularity such as for example a crevise between a door, a hood or a hatch and the vehicle body. Since the 5 cushion is elongated it can be applied practically in one piece over the whole length of the elongated irregularity, thus avoiding openings between cushion parts which could cause turbulances during the surface treatment or penetration of paint and the like between those cushionparts. Further due to the fact that the cushion is compressible 10 and elastic it can easily be bent in all kind of corners shown by the irregularity to be masked, which offers a continuous masking. Also due to the fact that the cushion is made of elastic foam its thickness can easily be zdapted to the depth of the irregularity by simply stretching or compressing in length the elongated cushion.
Another advantage of the cushion according to the invention is that it is repositionable which offers the possibility to reposition the cushion when it has incorrectly be applied on the irregularity to be masked.
The cushion can be directly fixed to the metal body 20 of the car or be superposed on the sealing gasket. Indeed, the adhesive characteristics of the masking gasket according to the invention allows the cushion to be applied as well on metal, rubber, as to any other materials, such as for example plastics. It is also possible to remove first the sealing gasket of the vehicle and then to masks the opening thus 25 formed using a cushion according to the invention.
Due to the easy application and the technical characteristics of the cushion a substantial time saving of nearly two thirds of the time required for the conventional masking of a vehicle door opening using the masking tape method can be gained and thus a 30 substantial economy realized.
The masking means according to the invention can be applied either by hand or by means of a device such as shown in figure 5. The device comprises a drum or core on which the cushion is wrapped. The device is provided with an handle 7 and with three rollers 35 8, 9 and 10. The cushion 1 passes between the rollers 8 and 9. By ."''-'' ~..
.: '" ' '~
'. ~ . ~ '~ '' 1331089 ~ :
, o pressing the roller 8 against the surface to be masked, the rolling of the latter will engage the roller 9 which on its turn will cause the cushion to unwind from the drum 6. When the cushion comprises a protective liner covering the adhesive substance, that protective liner 3 passes between the rollers 9 and 10. The engagement of the rollers 9 and 10 will cause the detachement and the removal of the protection liner when the cushion is applied on the surface to be masked.
The device can also be provided with a further roller on which the protective liner is rolled after it has been remoed from the cushuin. The device enables an easy and quick application of the cushion on the surface to be masked.
Figure 6 illustrates a packing box 14 comprising a masking means according to the invention. The packing box 14 is provided with a central opening 1 6 through which the cushion is pulled out. The cushion is wound on a coil 15 in the same fashion as electrical wire often is marketed. This way of packing offers the advantage that the cushion is suitably protected when it is inside the box, that it remains coiled and that it can easily be pulled out of the box which during the application of the masking means can simply rest on the floor.
It is also possible to fix the device on a robot arm in which the trajectory along which the cushion has to ba applied on the irregularity to be masked is loaded into the arm's memory.
It will be clear that the invention is not only applicable on automobiles but can also be applied on all kind of surface treatment operations such as for example the painting of the frame of a window of a home or cleaning at high pressure.
30 "
Claims (19)
1. A method for masking at least a part of a surface to be treated wherein an element that is resistant to a surface treatment operation is removably applied to said part of said surface and is removed after finishing said treatment, characterized in that said part is form d by an irregularity on the surface to be treated on which as said element an elongated compressible cushion is applied through a repositionable adhesive, said cushion being adapted to said irregularity such that the cushion masks a continuous area of the irregularity and contacts the surface to be treated.
2. A method as claimed in claim 1, characterized in that said cushion is applied to an elongated irregularity.
3. A method as claimed in claim 1 or 2, characterized in that as said cushion an absorbent, cushion is applied.
4. A method as claimed in claim 1, characterized in that as said cushion a cushion which is substantially cylindrically shaped is applied.
5. A method for masking at least a part of a surface to a treated wherein an element that is resistant to a surface treatment operation is removably applied to said part of said surface and is removed after finishing said treatment, characterized in that said part is formed by an irregularity on the surface to be treated on which as said element a polymerizing foam comprising at least a reactive substance is applied, said polymerizing foam then forming an elongated com-pressible cushion which is adaptable to said irregu-larity such that the cushion masks a continuous area of the irregularity and contacts the surface to be treated.
6. A method as claimed in claim 1 or 5, characterized in that said cushion is applied to said irregularity which is situated on a vehicle body.
7. A method as claimed in claim 1 or 5, characterized in that said cushion is applied to said irregularity which is formed by an opening between a vehicle door, hood or hatch and the vehicle body.
8. A method as claimed in claim 1 or 5, characterized in that said irregularity is formed by a weather strip applied to a vehicle body and the cushion is repositionably adhered to mask the weather strip.
9. A method as claimed in claim 1 or 5, characterized in that the cushion is adapted to the irregularity in such a manner as to at least bridge the irregularity.
10. A masking means provided for masking at least a part of a surface, said masking means being resistant to a surface treatment operations and removably applicable to said surface, characterized in that said masking means is formed by a repositionably adhesive elongated compressible cushion provided for being applied on an irregularity which forms said part of said surface, said cushion being adaptable to irregularity.
11. A masking means as claimed in claim 10, characterized in that said cushion has substantially a same cross section over its whole length.
12. A masking means as claimed in claim 10, characterized in that said cushion is an elastic foam cushion.
13. A masking means as claimed in claim 12, characterized in that said elastic foam is provided with a pressure sensitive adhesive layer, which covers at least a part of said cushion.
14. A masking means as claimed in claim 10, characterized in that said cushion is hollow.
15. A masking means as claimed in claim 10, characterized in that said cushion is substantially cylindrically shaped.
16. A masking means as claimed in claim 12, characterized in that said foam itself is tacky.
17. A masking means as claimed in claim 13, characterized in that at least said layer is provided with a protection liner.
18. A masking means as claimed in claim 10, characterized in that said cushion is wound in a coil.
19. A device for applying on a surface masking means as claimed in claim 10, characterized in that said device comprises a drum for unwinding said cushion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE8801085A BE1001535A3 (en) | 1988-09-22 | 1988-09-22 | MASKING PROCESS AND MEANS. |
| BE08801085 | 1988-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1331089C true CA1331089C (en) | 1994-08-02 |
Family
ID=3883640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000612212A Expired - Lifetime CA1331089C (en) | 1988-09-22 | 1989-09-21 | Masking method and masking means |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0365510B1 (en) |
| JP (1) | JP2806586B2 (en) |
| KR (1) | KR0128211B1 (en) |
| AT (1) | ATE109033T1 (en) |
| AU (1) | AU636119B2 (en) |
| BE (1) | BE1001535A3 (en) |
| BR (1) | BR8907095A (en) |
| CA (1) | CA1331089C (en) |
| DE (2) | DE365510T1 (en) |
| ES (1) | ES2060815T3 (en) |
| HK (1) | HK1007979A1 (en) |
| MX (1) | MX172436B (en) |
| WO (1) | WO1990003228A1 (en) |
| ZA (1) | ZA897239B (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128176A (en) * | 1990-02-05 | 1992-07-07 | Schmidt Dan R | Masking tape |
| GB2254812B (en) * | 1991-04-19 | 1994-10-26 | Minnesota Mining & Mfg | Masking methods using flexible strip |
| GB2254811B (en) * | 1991-04-19 | 1994-11-30 | Minnesota Mining & Mfg | Masking methods using a foam web |
| US5354614A (en) * | 1993-03-01 | 1994-10-11 | Minnesota Mining And Manufacturing Company | Masking tape with stiffened edge and method of gasket masking |
| US5547725A (en) * | 1994-02-25 | 1996-08-20 | Tesa Tape Inc. | Production of a novel sculptured strip of plastic foam |
| GB2288137A (en) * | 1994-03-08 | 1995-10-11 | Minnesota Mining & Mfg | Masking the "B" post of a vehicle using a foam strip |
| GB2298380B (en) * | 1995-02-28 | 1997-11-05 | Donald Murray Western | Masking method and device |
| DE29608636U1 (en) * | 1996-05-11 | 1997-09-11 | Vosschemie GmbH, 25436 Uetersen | Foam strips |
| DE29617703U1 (en) * | 1996-10-11 | 1996-12-05 | Vosschemie GmbH, 25436 Uetersen | Adhesive for foam strips |
| WO1999012654A2 (en) | 1997-09-10 | 1999-03-18 | Oliver Jevons | Masking tapes and application methods |
| DE29806610U1 (en) | 1998-03-28 | 1998-07-09 | Vosschemie GmbH, 25436 Uetersen | Plastic profile for gap sealing |
| US6596376B1 (en) | 1999-03-09 | 2003-07-22 | 3M Innovative Properties Company | Masking materials and method of use |
| DE19953096A1 (en) * | 1999-11-04 | 2001-05-17 | Beiersdorf Ag | Self-adhesive fabrics |
| DE19953097A1 (en) * | 1999-11-04 | 2001-05-23 | Beiersdorf Ag | Self-adhesive molded body |
| FR2820347B1 (en) | 2001-02-07 | 2003-11-14 | Saint Gobain Abrasif | MASKING METHOD, MASKING JOINT SUITABLE FOR THE METHOD AND MANUFACTURING METHOD OF SAID JOINT |
| DE102005030749A1 (en) * | 2005-06-29 | 2007-01-04 | Tesa Ag | tape hose |
| DE102005034950A1 (en) | 2005-07-22 | 2007-02-01 | Tesa Ag | Dispenser for the production of an adhesive tape tube |
| DE102007019262A1 (en) | 2007-04-24 | 2008-11-06 | Erbe Autolack Gmbh | Flat crepe paper adhesive tape for surface limitation during the repair work on car bodies in a frame of partial spray painting, comprises an adhesive for coating one side of a tape over its entire breadth, and plastic film- or paper strip |
| GB2480597A (en) | 2010-04-27 | 2011-11-30 | Jtape Ltd | A tape for masking a gap during spray painting and a method thereof |
| US10717105B1 (en) | 2019-08-15 | 2020-07-21 | Tns Solutions | Masking strip for use in painting vehicles |
| CN114472044B (en) * | 2021-05-27 | 2023-01-03 | 杭州以诺行汽车科技股份有限公司 | Intelligent spraying device and control method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3536569A (en) * | 1967-11-13 | 1970-10-27 | James L Gosnell | Dispenser-applicator apparatus for masking tape |
| DE2362584A1 (en) * | 1973-12-17 | 1975-06-26 | Teroson Gmbh | Self-adhesive sealing tape based pref. on butyl rubber - has an opt. adhesive-coated fabric on one or both surface, or embedded in it |
| JPS55153710A (en) * | 1979-05-17 | 1980-11-29 | Fujinaga Seiyaku Kk | Skin cosmetic |
| CA1296179C (en) * | 1985-06-27 | 1992-02-25 | Seinosuke Horiki | Masking member |
| JPH0320115Y2 (en) * | 1986-06-03 | 1991-04-30 | ||
| AU613958B2 (en) * | 1987-09-18 | 1991-08-15 | Nagoya Oilchemical Co., Ltd. | A masking member |
| JPH01151866U (en) * | 1988-03-25 | 1989-10-19 |
-
1988
- 1988-09-22 BE BE8801085A patent/BE1001535A3/en not_active IP Right Cessation
-
1989
- 1989-09-21 ES ES89870134T patent/ES2060815T3/en not_active Expired - Lifetime
- 1989-09-21 DE DE198989870134T patent/DE365510T1/en active Pending
- 1989-09-21 KR KR1019900701069A patent/KR0128211B1/en not_active IP Right Cessation
- 1989-09-21 AU AU42145/89A patent/AU636119B2/en not_active Expired
- 1989-09-21 EP EP89870134A patent/EP0365510B1/en not_active Revoked
- 1989-09-21 WO PCT/BE1989/000044 patent/WO1990003228A1/en unknown
- 1989-09-21 CA CA000612212A patent/CA1331089C/en not_active Expired - Lifetime
- 1989-09-21 DE DE68917077T patent/DE68917077T2/en not_active Revoked
- 1989-09-21 BR BR898907095A patent/BR8907095A/en not_active IP Right Cessation
- 1989-09-21 JP JP1509412A patent/JP2806586B2/en not_active Expired - Lifetime
- 1989-09-21 AT AT89870134T patent/ATE109033T1/en not_active IP Right Cessation
- 1989-09-22 ZA ZA897239A patent/ZA897239B/en unknown
- 1989-09-22 MX MX017656A patent/MX172436B/en unknown
-
1998
- 1998-06-27 HK HK98107287A patent/HK1007979A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03501464A (en) | 1991-04-04 |
| DE68917077D1 (en) | 1994-09-01 |
| DE68917077T2 (en) | 1995-05-11 |
| AU636119B2 (en) | 1993-04-22 |
| KR900701409A (en) | 1990-12-03 |
| MX172436B (en) | 1993-12-16 |
| EP0365510A1 (en) | 1990-04-25 |
| WO1990003228A1 (en) | 1990-04-05 |
| BE1001535A3 (en) | 1989-11-21 |
| DE365510T1 (en) | 1990-08-16 |
| ATE109033T1 (en) | 1994-08-15 |
| ES2060815T3 (en) | 1994-12-01 |
| AU4214589A (en) | 1990-04-18 |
| JP2806586B2 (en) | 1998-09-30 |
| HK1007979A1 (en) | 1999-04-30 |
| KR0128211B1 (en) | 1998-04-03 |
| BR8907095A (en) | 1991-01-08 |
| ZA897239B (en) | 1990-08-29 |
| EP0365510B1 (en) | 1994-07-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |