U.S. patent number 3,665,355 [Application Number 05/089,897] was granted by the patent office on 1972-05-23 for cover for protecting coatings of automobiles and the like.
This patent grant is currently assigned to Yamauchi Rubber Industry Co., Ltd.. Invention is credited to Hisashi Saikawa, Kenkichi Sasaki.
United States Patent |
3,665,355 |
Sasaki , et al. |
May 23, 1972 |
COVER FOR PROTECTING COATINGS OF AUTOMOBILES AND THE LIKE
Abstract
A cover for protecting coatings of automobiles and the like is a
composite sheet having a substantial length and width. The
composite sheet comprises a flexible sheet, a plurality of magnets
arranged in spaced relation to each other on one surface of the
flexible sheet, and a cushion material filling the spaces between
the magnets. The magnets and the cushion material are secured to
the flexible sheet. The magnets are flexible and made of a flexible
plastic material having finely divided magnetized magnetic material
dispersed therein.
Inventors: |
Sasaki; Kenkichi (Osaka,
JA), Saikawa; Hisashi (Osaka, JA) |
Assignee: |
Yamauchi Rubber Industry Co.,
Ltd. (Osaka, JA)
|
Family
ID: |
14524921 |
Appl.
No.: |
05/089,897 |
Filed: |
November 16, 1970 |
Foreign Application Priority Data
|
|
|
|
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Nov 19, 1969 [JA] |
|
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44/110014 |
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Current U.S.
Class: |
335/306; 428/99;
428/900; 296/136.02; 296/136.07; 101/389.1; 428/102 |
Current CPC
Class: |
H01F
7/0215 (20130101); Y10T 428/24033 (20150115); Y10S
428/90 (20130101); Y10T 428/24008 (20150115) |
Current International
Class: |
H01F
7/02 (20060101); H01f 007/02 () |
Field of
Search: |
;335/285,320,303,306
;248/26A ;296/136,136.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Harris; George
Claims
We claim:
1. A cover for protecting coatings of automobiles and the like
comprising a pair of flexible sheets having inner and outer
surfaces arranged with their inner surfaces facing each other, a
plurality of spaced-apart flexible magnets interposed between the
sheets and secured to the inner surfaces thereof, and cushion
material interposed between the magnets and secured to the inner
surfaces of the sheets.
2. The cover of claim 1 in which the cushion material is
fabric.
3. The cover of claim 1 in which the cushion material is
sponge.
4. The cover of claim 1 in which the cushion material is felt.
5. The cover of claim 1 in which the sheets are stitched together
between adjacent magnets.
Description
BACKGROUND OF THE INVENTION
The present invention relates to covers for protecting coatings of
automobiles and the like, and more particularly to covers for
protecting coated surfaces of automobiles during assembly
process.
The automobile assembly operation includes a step of drying a
coating, but since subsequent steps of incorporating interior
fittings and fixing exterior fittings are carried out before the
coating has been dried completely, the coating is subject to
marring during these steps of operation. In order to protect the
coating, accordingly, the coated surface has conventionally been
covered with a sheet made of a synthetic resin such as vinyl, which
is then secured in position with an adhesive tape. However, use of
a synthetic resin sheet with application of such means for securing
is not only troublesome but requires much labor since the adhesive
which remains after the sheet is taken off has to be removed.
SUMMARY OF THE INVENTION
The cover in accordance with this invention has such flexibility in
its entirety that it is well suited for application to a coated
surface in curved form like a bonnet of automobile. Insofar as the
surface provided with a coating is formed of a magnetic body,
flexible magnets enable the cover to be readily attracted and
fitted in position while insuring easy removal of the cover. The
cover has further advantages that when removed, the cover leaves no
traces on the coating and that it can be used repeatedly. Further a
cushion material serves to protect the coating from impact in the
event a jig or the like should drop thereon. Since it is impossible
for the present skill in the art to completely prevent transfer of
the plasticizer and barium ferrite contained in the flexible
magnet, there is a possibility of these materials bleeding to its
surface to stain a surface to be protected. With the present
invention, however, such trouble is perfectly precluded because the
under face of the magnet is covered with the flexible sheet which
prevents staining due to bleeding. With reference to the drawings,
the present invention will be described below in greater
detail.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a plan view showing an embodiment of the cover in
accordance with the present invention with part broken away;
FIG. 2 is a sectional view taken along the line II--II of FIG.
1;
FIG. 3 is a plan view, with part broken away, showing another
embodiment of the cover in accordance with this invention;
FIG. 4 is a plan view, with part broken away, showing another
embodiment of cover in accordance with this invention;
FIG. 5 is a sectional view taken along the line V--V of FIG. 4;
and
FIG. 6 is a view in longitudinal section showing another embodiment
of the cover in accordance with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1 and 2, a cover comprises a first rectangular
flexible sheet 1 having a substantial length and width, a plurality
of elongated barlike flexible magnets 2 extending across the sheet
1 and bonded to its inner surface with an adhesive in spaced
relation to each other, a cushion material 3 disposed between the
magnets 2 and bonded to the inner surface of the sheet 1 with an
adhesive, and a second flexible sheet 4 spaced apart from the first
sheet 1 and having the same area as the first sheet 1, the second
sheet 4 being secured to the magnets 2 and the cushion material 3
with an adhesive.
Since the cover is provided with a plurality of spaced apart
magnets 2, the cover can be cut off for use at the position of the
cushion material 3 between adjacent magnets, depending upon the
area of the coated surface to be protected. In the case where the
cover is prepared in conformity with the area of the coated
surface, a cover provided with the magnets 2 at least at the
opposite ends of the sheet 1 may serve the purpose.
Suitable as the flexible sheet are a sheet made of a synthetic
resin such as vinyl chloride, polyethylene, polypropylene,
copolymer of ethylene and vinyl acetate, chlorinated polyethylene,
nylon or polyester and a fabric made of cotton or synthetic fibers
such as nylon fibers, polyester or polyvinyl alcohol fibers. It is
desired that the first sheet be 0.05 to 0.15 mm in thickness and
that the second sheet be of a thickness of 0.05 to 0.5 mm.
Preferably, the flexible magnet may comprise a synthetic rubber or
a synthetic resin and barium ferrite of 1 to 7.mu. mixed and
kneaded therewith in the weight ratio of 1:5 - 10.
Examples of the synthetic rubber are styrene rubber, nitrile
rubber, butyl rubber, Neoprene, isoprene, ethylene-propylene rubber
and chlorosulfonated polyethylene. Examples of the synthetic resin
are vinyl chloride, polyethylene, chlorinated polyethylene and
copolymer of ethylene and vinyl acetate. The flexible magnet may
preferably by 0.5 to 2 mm, most preferably 1 to 1.5 mm, in
thickness and 20 to 200 mm in width, the most preferable width
being about 150 mm. It is desired to space apart the flexible
magnets from each other by a distance of 50 to 500 mm, most
preferably, by about 150 mm.
Employable as the cushion material for filling the spaced between
the flexible magnets are a woven or nonwoven fabric made of
synthetic fibers such as nylon, polyester or polyvinyl alcohol
fibers; a rubber sponge such as SBR, NBR or NR; a synthetic resin
sponge such as vinyl chloride, polyethylene or copolymer of
ethylene and vinyl acetate; and felt.
FIG. 3 shows another embodiment of the cover in accordance with
this invention. This cover is different from the embodiment shown
in FIG. 1 and 2 in that a plurality of magnets 12 are rectangular
and that the magnets 12 are disposed only along the periphery of
the sheet 1 in spaced-apart relation to each other. The sheet 1 is
of course provided, on its inner surface, with a cushion material
13 at areas other than where the magnets 12 are present.
FIG. 4 and 5 show another embodiment of the cover of this
invention.
This cover comprises a first rectangular flexible sheet 1 having a
substantial length and width, a plurality of rectangular flexible
magnets 22 arranged on the inner surface of the sheet 1 in
longitudinally and transversely spaced-apart relation, a cushion
material 23 disposed along the periphery of the sheet 1 and between
the magnets 22, and a second flexible sheet 4 spaced apart from the
first sheet 1 and provided over the magnets 22 and the cushion
material 23, the second sheet 4 having the same area as the first
sheet 1, the first flexible sheet 1 and the second flexible sheet 4
being fixedly stitched together between adjacent magnets 22.
FIG. 6 shows still another embodiment of the cover in accordance
with this invention. This cover is different from the embodiment
shown in FIGS. 4 and 5 in that a cushion material 33 extends away
from the inner surface of the sheet 1 beyond magnets 32 and covers
the magnets 32 and that the respective elements are bonded together
with an adhesive. A second flexible sheet may of course be placed
over and fixedly joined to the exposed surface of the cushion
material 33.
Except by adhesion and stitching, the respective elements may be
fixedly joined together by fushion depending upon the properties of
the materials.
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