FIELD OF THE INVENTION
The invention relates to a system for making illustrations, comprising
at least a sheet of writable material having a first side and a second side, and
at least an ink-producing writing means for writing on the sheet of material.
DISCUSSION OF THE PRIOR ART
Such systems are well known, for example in the shape of sheets of
transparent material on which can be written and drawn in order to offer presentations
with the aid of an overhead projector.
US-A-5 732 759 discloses a device comprising a sheet and a flexible
frame in which the sheet is mounted.
SUMMARY OF THE INVENTION
The invention aims to provide a system of the above mentioned type,
which offers alternative possibilities of use.
To reach this object, the system according to the invention is characterized
by a frame in which the sheet of material, such as a foil or film, is mounted, and
attaching means for attaching the system of the sheet of material and the frame
on a vertical surface.
A first advantageous possibility of use which is being realized in
this way, is to enable children on the back seat of a car to make an illustration
on the sheet of material, and subsequently to exhibit this illustration by attaching
it to a side window of the car. Preferably, in this application the sheet of material
is essentially transparent, so as not to obstruct a part of the view of the driver
of the car. Thus the activity of drawing is combined with riding along in the car,
which leads to a satisfactory situation for both child and the driver of the car,
because the child is being entertained in a pleasant way.
Of course, illustrations can also be produced by adults.
A second advantageous possibility of use which is being realized with
the system according to this invention, is making illustrations at home and for
example in shops, where the sheet of material is being attached to an interior window
or to a window on the outer wall. In the latter case the illustration can be viewed
The system according to the invention can be used for example to spread
a commercial, political, religious or ideological message from behind a car window,
home window or shop window.
With a proper choice of attachment means the system can also be attached
to a wall or any other vertical surface.
For some uses the sheet of material can be essentially opaque, and
moreover be adapted to be pervious to the ink from the writing means from the first
to the second side. In particular the application is being contemplated wherein
the attachment means are situated on the second side of the sheet of material, and
are adapted to attach the system of sheet of material and frame to a transparent
wall, such as a window, through which the illustration is to be viewed.
Preferably the ink is covering to insure a clearly viewable illustration.
For many applications it is further required that the ink is removable (from surfaces
such as the sheet of material) and/or removable by washing (from clothes and the
like) and non-poisonous.
Normally speaking the ink is coming off through a writing point of
an oblong writing means, such as in particular a felt-tipped pen and the like. In
a preferred embodiment an essentially sleeve-shaped protection member is provided
around the writing point, which is movable in the longitudinal direction of the
writing means in order to cover the writing point when it is not in contact with
the sheet of material. In particular the protection member covers the writing point
to reveal at least part of the writing point when this is placed on the sheet of
material. This is advantageous in particular in the above mentioned application
of the system according to the invention when the writing material is being used
by a child in the car, when it is undesirable when the ink of a free writing means
is coming off on the interior parts of a car.
In a preferred embodiment the protective member consists of a flexible
and elastic material, such as rubber, and simply is designed as a bellows.
For a suitable use the system further comprises a writing means holder,
such as a case with an opening flap, to put away the writing means, which writing
means holder is provided with holder fixing means, such as a sucker, to attach the
case to the earlier mentioned surface.
In another preferred embodiment the system further comprises erasing
means, such as a cloth or sponge moistened with a non-poisonous, ink-resolving substance,
possibly washable, to remove the ink from the sheet of material.
In a simple, inexpensive and fit for the purpose design, the frame
is thread-like. However, the frame can also have an at least partially U-shaped
cross-section and grip around an edge of the sheet of material.
In order to place the system of the sheet of material and the frame
adjacent to the above mentioned surface, the frame is at least partially provided
with one or more projections or ribs, which extend substantially transverse to the
surface of the sheet of material, of which projections or ribs the extreme points
are intended to rest against the surface. Thus, the sheet of material is being held
at a suitable distance from the surface in order to prevent undesired accumulation
of moisture between the sheet of material and the surface, thanks to the created
When connecting the system of the sheet of material and the frame
to a smooth surface, the use of one or more suckers as fixing means is preferred.
In that case, advantageously a connection between the sheet of material and/or the
frame and each sucker comprises a first, male part and a second, female part, the
male part being adapted to be inserted into the female part in order to produce
a detachable connection. In this case the sucker(s) can be placed permanently on
the surface, by which the assembly of the sheet of material and the frame can be
detached from the sucker(s) in order to provide an illustration thereon, and next
can be connected again.
The claims and advantages will be more readily appreciated as the
same becomes better understood by reference to the following detailed description
and considered in connection with the accompanying drawings, in which like reference
symbols designate like parts.
BRIEF DESCRIPTION OF THE DRAWINGS
DESCRIPTION OF THE PREFERRED EMBODIMENTS
- FIG. 1 shows a sheet of material provided with a frame in perspective.
- FIG. 2 shows on an enlarged scale a cross-section according to line II-II of
the component of FIG. 1.
- FIGS. 3-5 show a part of a cross-section of alternative embodiments.
- FIG. 6 shows a part of a cross-section of another embodiment in contact with
- FIGS. 7-8 show attachment means according to the invention in cross-section.
- FIGS. 9-10 show partially in cross-section several embodiments of writing means
according to the invention.
- FIG. 11 shows a writing means holder and erasing means.
FIGS. 1 and 2 show a sheet of material 1, preferably a transparent
synthetic material. The sheet of material 1, which in FIG. 2 for the sake of clarity
is represented considerably thicker than it will be in reality, is provided with
a frame 2 which, as FIG. 2 shows in detail, comprises a thread-shaped body 3, round
which the edge of the sheet of material 1 is applied in a suitable way. The thread-shaped
body 3 can be made of metal, and can be connected to the edges of the sheet of material
1 under a pretension, in order to keep the sheet of material under pretension by
the thread-shaped body, and thus keep it tight.
The shape of the sheet of material can be chosen as one desires, for
example round, rectangular, and the like.
FIG. 3 shows a U-shaped frame 4, made for example of synthetic material,
gripping round the edge of the sheet of material 1.
FIG. 4 shows a flat frame 5, made for example of cardboard, in which
the edge of the sheet is fixed.
FIG. 5 shows a frame 6 of the type shown in FIG. 3 which is provided
with projections or ribs 6a and 6b extending transversely to the plane of the sheet
of material 1.
FIG. 6 shows a frame 7 of the type shown in FIG. 3, which is provided
with a projection or rib 7a extending transversely to the plane of the sheet of
material 1, which projection or rib is intended to rest on a surface of e.g. a wall
or a window-pane (like a window 8). The projection or rib 7a ensures that a proper
distance is being held between the sheet of material 1 and the surface.
FIG. 7 shows a sheet of material 1 on which a sucker 9 is fixed, for
example with the means of glueing or welding. The sucker 9 allows for fixing the
sheet of material 1 on a smooth surface such as a window-pane. In FIG. 1 by means
of dotted lines 10 places are indicated where suckers 9 can be fixed to the sheet
of material 1. Obviously, it is possible to combine the embodiment according to
FIG. 7 with one of the embodiments of the frame shown in FIGS. 2-6.
FIG. 8 shows the embodiment of the frame according to FIG. 2. On the
frame a number of projections 11 extending transversely to the plane of the sheet
of material 1, each projection being provided with a thickened extremity. The projections
11 are intended to be placed in a hole 12 of a sucker 13, which then can be placed
on a smooth surface. The dimensions of the hole 12 are such, that a firm and detachable
connection between the frame and the sucker 13 can be obtained. It is also possible
to provide similar projections which substantially are directed parallel to the
plane of the sheet of material 1 from the frame. Such projections can be accommodated
in a hole of a sucker provided at a side thereof. Of course the projection can also
be placed on the sucker, the corresponding hole being e.g. provided in the frame.
FIG. 9 shows a felt-tipped pen 14 with a writing point 15. Around
the writing point 15 a slidable, substantially sleeve-shaped protection member 16
is provided, of which the end facing away from the writing point 15 end is accommodated
in a sleeve 17 fixed to the wall of the felt-tipped pen 14, and is kept under pressure
of a spring 18. As a consequence, the protection device 16 normally will cover the
writing point 15, such that the ink from the writing point 15 cannot be released
in an undesired way. However, as soon as the felt-tipped pen 14 is being placed
on a surface, such as a sheet of material 1, the protection member 16 will be pushed
away in order to expose a part of the writing point 15, so that the felt-tipped
pen can be used in a regular way as writing means.
FIG. 10 shows a felt-tipped pen 19 with a writing point 20 which normally
speaking will be covered by a bellows 21, which is made of a flexible and elastic
material. When writing with the felt-tipped pen 19 the bellows will be pushed so
far inward, that the writing point comes into contact with the surface to be written
FIG. 11 shows a holder 23 for writing means 19, the holder being provided
with a sucker 22, and further containing a sponge 24 for erasing an illustration
made with a writing means 19 on a sheet of material.