Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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MASKING MEMBER
BACXGROUND OF THE INVENTION
The present invention relates to a masking member which
protects a part of a surface of an article from a surface
treatment such as coating, plating, vacuum evaporation,
phosphati~ing, and the like. More particularly, the present
invention relates to a masking member produced by the molding
of a sheet having a shape corresponding with a part of a
surface of an article to be protected from a surface
treatment wherein said masking member has (an) indention(s)
into which (a) projection(s) of said part is~are) insexted.
When a surface treatment is effected on the surface of an
article, and if said surface of said article has (a) part(s)
on which said surface treatment should not be effected for
~ the reason that another surface treatment is effected on
i said part(s) after said surface treatment of said surface
treatment spoils the appearance of said article and so on,
said part(s) of said surface of said article may be covered
and protected with said masking member.
DESCRIPTION OF THE PRIOR ART
Hitherto, adhesive tape has been used as a masking member
to protect a part of a surface of an article such as a
bumper oi an automobile and the like. Namely, the adhesive
tape is attached to said part of said surfaca to protect
said surface from said surface treatment and after said
surface treatment, said adhesive tape is removed from said
surface. Said surface may not be effected by said surface
treatment since said part of said surface was covered with
said adhesive tape durlng said surface treatment~
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Nevertheless, adhesive tape as a masking member has faults
in that attaching and removing of the adhesive tape to/from
said part of said surface take time and have a high labor
cost, and further, the adhesive tape attached to said part
of said surface is buried in the layer of said surface
treatment and it is very difficult to find the end of said
buried adhesive tape to remove said adhesive tapeO Said
faults of adhesive tape may seriously obs,truct a mass-
production line such as a coating line for automobiles.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to save
trol~ble when the masking member is attached/removed to/from
a part to be protected. According to the present invention,
there is provided a mas~ing member produced by the molding
of a sheet having a shape corresponding with a part o a
surface of an article to be protected from a surface treat-
ment wherein said masking member has (an) indention(s) into
which (a) projaction~s) of said part is(are) inserted~
BRIEF DESCRIPTION OF THE DRAWINGS
FIG, 1 to FIG. 4 relate to an embodiment of the present
invention.
;~ ~FIG. 1 is a perspective view of the masking member.
FIG. 2 is a partial perspective view of the front part of-
an automobile.
FIG. 3 is a partial perspective view of the front part of
the automobile after coating.
FIG. 4 is a partial perspective view of the front part of
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the automobile after the masking member is removed from
the bumper.
FIG. 5 and FIG. 6 relate to another embodiment of the
present invention.
FIG. 5 is a perspective view of the masking member.
FIG. 6 is a cross sectional view showing that the masking
member is attached to a part of a surface.
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DETAILED DESCRIPTION
The masking member of the present invention is made of a
sheet such as from plastics or rubber such as polystyrene,
polyethylene, polypropylene, ethylene-propylene copolymer,
polyvinylchloride, polyvinylidene chloride, polymethacrylate,
styrene-butadiene copolymer, acrylonitrile-butadiene copolymer,
polybutadine polyisoprene, polyisobutylene, polychloroprene,
isoprene-isobutylene copolymer, natural rubber, polyurethane,
melamine resin, urea resin, phenolresin, epoxyresin and
the like; foams of said plastics; or said rubber; fiber
sheet such as fabricrubber, knitting,non-woven fabric,
paper, corrugated cardboard and the like; thermoplastic
resin - impregnated fiber sheet; thermosetting resin -
impregnated fiber sheet; wooden sheet such as wood board,
hardboard, plywood and the like; metal sheet and the like;
laminated sheet consisting of a plural number of sheets
selected ~rom the group oE said sheets. In cases where
said masking member is made of a sheet from plastics or
rubber, it is desirable to mix inorganic filler such as
calcium carbonate, silica, talc, clayr bentonite, stone
powder, blast furnace slag, flyash, and the like into said
plastics or rubber since heat resistance, mechanical
properties and the like of said masking member are improved
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by said inorganic filler and further, when a used masking
member is burnt in a combustion furnace, a smaller combustion
energy is produced so that said combustion furnace will
stand long use. Usually, 10 to 500 weight parts, desirably
20 to 400 weight parts of said inorganic filler are mixed
into said plastics. Further organic filler such as wood
powder, organic, fiber powder, walnut powder, coconut powder,
flour, chaff powder and the like may be mixed into said
plastics or rubber. Still further, dyestuff, pigment,
antioxidant~ ultra~iolet absorber plasticizer and the
like may be mixed into said plastics or rubber. Polyolefin
such as polyethylene, polypropylene and the like are
desirable plastics for the material of the sheet of the
masking member of the present invention since said polyolefin
has high solvent resistance and is inexpensive, and of
course, polyolefin in which said inorganic filler is mixed
is a desirable material for said masking member. Polystyrene
foam is also a desirable mater:Lal for said masking member
since said polystyrene foam is light and inex~ensive,
nevertheless, since said polystyrene foam has a low solvent
resistance and a low heat resi3tance, it is desirable to
laminate a suitable plastic or rubber onto said polystyrene
foam.
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~- Vacuum forming, press molding, casting, extrusion, injection,
molding, paper making and the like may be used to produce
the masking member of the present invention.
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~he masking member of the present invention is easily
attached to a part of a surface of an article to be
protected by inserting (a~ pro;ection(s) of said part into
(an~ indention(s) of the masking member and said masking
member is easily removed from said part by extracting said
projectionts) of said part from said indention(s) of said
masking member. Accordingly, said masking member of the
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present invention can be correctly, easily, and securely
attached to a part of a surface by the guide of said
projection(s) of said part and said indention(s) of said
masking memher.
Fig. 1 to Fig. 4 relate to an embodiment of the present
invention. Referring now to Fig. 1 to Fig. 4, a masking
member (110) is produced by the molding of a sheet (111)
and has a shape corresponding with the surface of the
lower half (121) of a bumper (120) of an automobile (130)
and indentions (111A), (111B) are formed in both ends of
said mas}cing member ~110) wherein projections (121A), (121B)
in both ends of said lower half t121) of said bumper (120t
are insexted into said indentions ( 1 1 1 A ), ( l l l B ) of said
masking member (110). Further/ a reinforcing rib (113) is
formed in said masking member (110) and an adhesive layer
(112) is formed on the upper edge of the inside of said
masking member (110).
Said masking member (110) is correctly, easily, and securely
attached on said lower half (121) of said bumper (120) by
inserting said projections (121A), (121B) of said bumper (120)
into said indentions (111A), (111B) of said masking member
(110) and adhering said adhesive layer (112) to the upper
edge of said lower half (121) of said bumper (120), and
then a paint (140) is coated on said bumper (120) as shown
in Fig. 3. After said coating, said masking member (110)
is easily removed from said bumper (120) and said paint (140)
is not coated on said lower half ~121) of said bumper (120)
while said paint (140) is coated on the upper half (122)
of said bumper (120) as shown in Fig. 4.
Fig. S and Fig. 6 relate to another embodiment of the
present invention. Referring now to Fig. 5 and Fig. 6,
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a masking member (150) is produced by the molding of a
sheet (151) and has a shape corresponding with a part (161)
of the surface of the underside of an automobilel and a
pair of indentions (151A), (151B) are formed in said masking
member (150) wherein projections (161A), (161B) of said
underside of said automobile are inserted into said indentions
(151A), (151B) of said masking member (150).
Said masking member (150) is attached on said part (161)
of said surface (160) of said underside of said automobile
by inserting said projections (161A), (161B) of said part
(161) o~ said surface (160) of the said underside of said
automobile into said indentions (151A), (151B) of said
masking member. In a case that the minimum diameters of
said indentions (151A), (151B) of the masking member (150)
are respectively a little smaller than the maximum diameters
of said projections t161A), (161B) of said part (161), said
projections (161A), (161B) are tightly inserted into said
indentions (151A), (151B) and as the result, said masking
member is securely attached to said part (161) without an
adhesive layer. In this case, it is desirable that a
laminated sheet consisting of a. soft elastic sheet such as
a soft-type polyvinylchloride foam sheet, soft-type
polyurethane foam sheet, soft-type melamine resin foam sheet,
foam rubber sheet, felt sheet and the like, and a rigid
sheet such as a hard-type polyvinylchloride sheet,
polys~yrene sheet, polyethylene sheet, polypropylene sheet,
resin-impregnated fiber sheet, hard-type paper, hard-t~pe
wooden shèet, metal sheet and the like is used as the
material of said masking member ~150). In said masking
member ~150), said soft elastic sheet is located inside
said indentions (lSlA), (151B) and said rigid sheet is
located outside said indentions (151A), (151BJ. Said
surface (16Q) of said underside of said automobile is
then coated with a paint. After said coating, said masking
member (150) is removed from said part (161) of said
surface (160).
