WINDOW-COVERING FOR ROAD VEHICLES AND ITS APPLICATION

COUVRE-GLACES DE VEHICULES AUTOMOTEURS, ET MODE D'EMPLOI CONNEXE

English Abstract

Abstract of the Disclosure

In order to prevent, during the winter season, the form-
ation of a relatively difficult-to-remove layer of ice on at
least some of the windows of a road vehicle these window sur-
faces are protected by a detachably-self-adhering window cover con-
sisting of a flexible material. The covering comprises a
window covering for a road vehicle window, comprising an adhesive free flex-
ible cover part having a major surface which is detachably
self-adherent to glass, at least part of said cover part
adjacent said major surface consisting of polyvinyl chloride
containing 30 to 42% by weight of a softener comprising di-
octylphalate, dodecylphthalate, dibutylphthalate or another
phthalic acid derivative.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A window covering for a road vehicle window, com-
prising a flexible cover part having a major surface which
is adhesive free and detachably self-adherent to glass, at
least part of said cover part adjacent said major surface
consisting of polyvinyl chloride containing 30 to 42% by
weight of a softener which is a phthalic acid derivative.

2. A window covering as claimed in claim 1, in which
the softener is selected from dioctylphalate, dodecylphatha-
late or dibutylphthalate.

3. A window covering as claimed in claim 1, wherein
the polyvinyl chloride contains 37% by weight of the softener.

4. A window covering as claimed in claim 2, wherein
the opposite major surface of said flexible cover part in-
cludes a metallic foil.

5. A window covering as claimed in claim 4, wherein
said metallic foil is of tin or aluminium.

6. A window covering as claimed in claim 1, 2 or 4,
wherein the cover part has a peripheral marginal zone which
is adapted to make-self-adhesive contact with the glass sur-
face and which has, at least one region having no adhesion
or a lesser adhesive strength than that of the rest of the
surface area of the zone in contact with the glass in use.

7. A window covering as claimed in claim 1, 2 or 4,
wherein the cover part has a reinforced peripheral margin
zone.

8. A window covering as claimed in claim 1, 2 or 4,
wherein the cover part has a peripheral margin zone which






has a greater adhesive power to glass than the remaining
area in contact with the window surface in use.

9. A window covering as claimed in claim 1, 2 or 3,
having advertising material thereon.

10. A method of providing a detachable cover for the
windshield of a road vehicle, comprising the steps of press-
ing an adhesive free sheet composed of a flexible foil con-
sisting of polyvinylchloride containing a softener within
a range of 30% to 40% by weight, said softener consisting of
a phthalic acid derivative, with one of its sides against
the exterior surface of the windshield until it self-adheres
thereto.

11. A method as claimed in claim 9, in which the softener
is selected from dioctylphalate, dodecylphathalate or di-
butylphthalate.

12. The method as claimed in claim 9 or 10, wherein
said foil has a peripheral zone adapted to adhere to glass
at a predetermined adhesive force, the remainder of said
foil being adapted to adhere to glass at a prearranged force
smaller than said predetermined adhesive force.

Description

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This invention relates to a window covering for road
ve'hicles, especially for the front and rear windscreens, and
its application.

It is well known,that during the winter season the win-
dows of road vehicles which are parked out of doors are very
often covered with layers of ice or snow and their cleaning
involves a good deal of time and trouble.

The pres,ent invention provides a covering which eliminates
the need for laboriously cleaning the windscreens and windows
of the car in snow and icy conditions and which is easy to
handle and apply.

According to the present invention there is provided a
window covering for a road vehicle window, comprising a flex-
ible cover part having a major surface which is detachably
self-adherent to glass, at least part of said cover part ad-
jacent said major surface consisting of polyvinyl chloride
containing 30 to 42% by weight of a softener comprising di-
octylphalate, dodecylphthalate, dibutylphthalate or another
phthalic.acid derivative.

Thus i~.accordance with the present invention the cover-
ing consists at least of a cover sheet which is made of.aflexible material of self-sticking and adheres detachably to
the window or windscreen surface.

The invention ~urther provides for the application

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of the car window covering accord~ng to this
invention as an advertising medium.

The invention is hereinafter described, by
way of example, with reference to the drawings
wherein:

Figure 1 is a perspective view showing a
covering according to one embodiment of this invention
as applied to the frontal windscreen of a motor car,and .

Figure 2 is a plan view of another embodiment :
of the invention with the adhesive side facing the
viewer.

Figure 1 is a perspective illustration of a
: cover part 2 consisting of a flexible foil and
: adhering firmly but manually detachably to the
15 ~ windscreen 1 of the car.

~he adhesion strength of the foll material
::~ of this cover part 2 is, on the one hand, sufficiently
high to provide reliable assurance that the cover
part 2 will not be accidentally detached from the
,.
windscreen even in strong wind and rain conditions
and not even when covered with snow and/or ice,
,
whilst on the other hand the cover part 2 can be
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readily taken off the windscreen 1 by hand without suffering
any damage.

Foils containing about 30 to 42% b.w, preferably 37% b.w.
soEtener or paper or textile fabrics coated or impregnated
with this material may be used for such-a self-sticking cover
part 2. The softener is preferablv either dioctvlphthalate,
didecylphthalate or dibutylphthalate.
For easier manual detachment of the cover 2 from the car
windows prior to driving off, the peripheral marglnal zone
of the cover part, which has adhesive contact with the glass
surface, has, in at least one region 4 thereof, an inferior
adhesion strength than elsewhere, or no adhesion at all.

Also, the peripheral marginal zone 3 of the cover part 2
may be reinforced to avoid tearing when the cover 2 is detach-
ed, or peeled off the glass.
In order to prevent rain water from running into and
collecting beneath the cover part 2, it mav be advantageous
to impart to the peripheral marginal edge 3 of the cover
part 2 a higher adhesion strength relative to glass than the
rest of the cover surface area in contact with the window
or windscreen surface.
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A window covèring according to this invention can very
obviously also be used by way of a sun-shield or blind,
however, in that case, it is essential that the adhesion power
!! of the cover part 2 on the glass surface must still be ad-
i equately strong even at elevated temperatures. For this kind
l~ of application it would be an advantage to render the side of
the cover which faces the sun highly heat-and light reflective,
e.g. by means of Sn- or Al-foils.
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Furthermore, the window covers according to the present
invention are also excellent advertising media.




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