FR2742097A1 - Gum applicator for paper - Google Patents

Abstract

The applicator has a guide to allow positive rotary drive of a flexible profile which may be abrasive, without use of grippers or locking cones, to allow driving of a conical aspiration turbine with the same drive axis as the guide. The guide (8) has, in its internal diameter, four channels (12) disposed mutually at 90 degrees. The channels each drive the profile (11) through 90 degrees and release the pushers by friction of the profile on the work plane. The channels allow final evacuation of the pushers and cooling of the active part of the profile.

Description

Rotary motorized scrubbing machine with dust extraction
In the current state of the processes of gumming on paper, cardboard, polyester film and others; of text drawings etc ..., we are now seeing the preferential use of small, generally cylindrical erasers, and an evolution in their compositions (Hardness - Flexibility).

Indeed, we find in the trade, gums of low hardness, very flexible and small sections: o 3 to 15 mm, which allow to ensure a more effective exfoliation, while altering only very little, the support of the drawing or text. They also bring a certain precision, in the exfoliation, due to their cylindrical sections of small diameters.

However, in the context of our prior art research and also in the devices proposed for the use of this type of gum, we do not find an example, allowing rational use, of this type of gum, and note that these devices have certain shortcomings, namely
1 / - Lack of precision of the exfoliation, at the point of intervention
2 / - Irregular wear of the rubber, in its active part
3 / - Difficult shaping of the active part of the gum after use
4 / - Difficult cleaning of the active part of the gum after use,
due to adhesion of gum dust, and fouling by
inlay of graphite or ink dust, and presenting
after using irregular veneers
5 / - In addition, these types of gums, can present according to their
compositions, faster wear, resulting in gum dust
very important, requiring the use to evacuate them, of
brush, brush or cloth. Hence workstation and environment
improper, because the accumulation of this dust on the plane of
work, causes on it, various important traces,
which are difficult to remove as they are formed
on the work plan.

To overcome these different observations, we studied:
A scrubbing device fig. 1
The purpose of this device is to offer interested parties a small working tool, powered by batteries or rechargeable batteries, light, handy and very functional. Allowing to bring in the use of the rubber profile (11) many advantages, which will be very appreciated by the users of profiles / rubber (11) or fiber bundles, currently in development.

Composition of the scrubbing device fig. 1 1 Electrical part which consists of
(1) micro motor - (2) rechargeable batteries or accumulators - (3) 1 connection card, ensuring the switching to 1 or 2 speeds of the micro motor, starting or stopping it, and recharging the batteries or accumulators - (4) 1 "Bubble" switch: on 'off.

1 Dressing and mechanical part which consist of
(5 A) (5 B) - 2 half-shells welded by ultrasound, after assembly
age
(6) - 1 removable rear cover
(7) - 1 dust evacuation hatch
(8) - 1 guide of monobloc profiles fig. 6
(8 A) - 1 turbine
(8 B) - 1 gear
(9 A) - 1 adjustment nozzle
(9 B) - 1 locking adjustment nozzle
(10) - 1 motor gear
(11) - 1 profile / rubber
(12) - 2 charging pins for batteries or rechargeable batteries
I - Dust extraction
The scrubbing device fig. 1 allows, due to the rotation of the suction conical turbine - 8 A - to continuously evacuate pencil dust, fibers, ink, paper to the dust receptacle.

The position of the 4 channels - 12 - around the profile (11) allows maximum suction on the gumming point where intervention and on the work surface
X fig. 6.

These 4 channels - 12 - being located inside the registered suction diameter of the turbine and authorizing the production of a straight profile of these 4 channels fig. 6.

It - Very high precision of exfoliation
Because the scrub device fig. 1, allows the profile / eraser (11) to rotate on itself, thus offering the possibility of ensuring the erasing of a precise point, without movement of the hand on the work surface.

Erase a line, a circle in pencil or ink, without making the usual return trip with your hand on the work surface.

Our objective being to be able to use the profile / rubber (11) introduced inside the scrub apparatus fig. 1, like a rotary pencil where a drawing point; associated with a continuous suction of the dust generated by the wear of the profile / rubber (11).

III - Regular wear of the gomma profile (11)
The scrubbing device fig. 1, allows regular wear of its profile due to continuous rotation of the rubber profile (11) on the work surface
IV - Facility for reshaping the profile / rubber (11)
The scrubbing device fig. 1 due to its continuous rotation, allows the delivery to the desired profile of the active part of the profile / rubber (11) an appropriate profiling accessory, the latter being driven by no rotational movement.

This accessory will be presented, against the active part of the profile / rubber (11) which will be animated by a rotational movement. The dust generated is automatically sucked in by the turbine - 8 A - and directed towards the dust receptacle - 17 -.

V - Easy cleaning of the active part of the profile / dyke (11)
The scrubbing device fig. 1, makes it possible almost instantaneously to ensure the removal of dirt from the active part of the profile / rubber (11) by pressing and rotating it on an abrasive support, always with the dust suction continuously.

VI - Very easy exfoliation
At the lower front of the scrubber fig. 1, we have provided a plane X, positioned between 30 and 700 with respect to the axis of the profile / rubber (11), which, placed on the work surface, allows the profile / rubber (11) to be moved without lifting the of the worktop.

VII - Great ease for rubber advance or retreat
Due to a free centering, in section of the profile (11) inside the guide body - 8 - during the stop or rest position of the device, allows the user to ensure rotation, without constraint of the profile (11) by means of the adjustment nozzle - 9 A - or - 9 B - with precision, either manually, or in semi-auto by rotation of the micro-motor.

VIII - Perfect vision of the scrub point
At the upper front of the scrubbing device fig. 1, we have provided a plane Y inclined between 15 and 600 relative to the axis of the profile / rubber (11) allowing very good visibility, points to be erased.

To facilitate a good grip of the exfoliation device, we have provided fig. 2 and fig. 3, 2 lateral leaves, formed by 2 concave spokes - R on the outside of the 2 half-shells (5 A) (5 B); these 2 spokes R extending over the entire length of the front part, that is to say on the outside of the dust receptacle - 17 -.

On the other hand, we have located the "bubble" switch (4) in the hollow of the gripping leave - R - fig. 2, in order to be able to ensure that the device is started up, without having to move the gripping fingers, of the user; and to allow the automatic shutdown of the device, as soon as it is installed.

The arrangement of the main elements constituting this device has been studied in order to obtain the maximum ease of use, namely
Ergonomic shape obtained by placing the micro-motor (1), the batteries or accumulators (2) at the top, that is to say above the operator's hand.

This arrangement allows a balancing of the masses and a very good grip of the device, at the dust receptacle level - 17 - located at the front thereof curved on its 2 lateral faces and not offering thickness fig. 2 and fig. 3 as 8 mm to 25 mm grip.

The dust container - 17 - fig. 1 - is placed just at the air outlet, from the turbine - 8 A - eliminating all additional evacuation pipes between the 2, which are always harmful to the progression of dust.

The dust container - 17 - fig. 1 - has at its lower part a sliding evacuation hatch (7) which makes it possible to completely empty the dust receptacle - 17 -.

This sliding hatch (7) will be locked in the closed position, by 2 small cones in relief - 24 - located inside this hatch (7) and positioned in an appropriate conical groove, executed on the 2 half-shells (5 A) and (5 B). The dust circuit, passing inside the 2 half-shells (5 A) and (5 B), will be sealed by ultrasonic welding, between them, after assembly.

Possible improvements
For a so-called "Luxury" version, we will equip the scrubbing device fig. 1 of a small diode, placed at the front, emitting additional point lighting of the gumming point.

Possible Considerations
Rubber profiles (11) of hexagonal, triangular, square section, etc.

can be used, with a suitable guide body - 1 -. However, cleaning and resetting the active part of the profile / rubber (11) to the profile will be made much more difficult.

Complementary tools
We can use the scrubbing device fig. 1 only, for its function, micro-vacuum cleaner.

In this case, the profile / rubber (11) will be brought back inside the profile guide - 8 - fig. 1 up to the level, from the turbine inlet - 8 A -, leaving the entire central diameter clear - for the passage of the suction flow to the turbine inlet - 8 A - and thus allowing the path of the suction flow inside the dust container - 17 -.

ADDlication fields - Design offices - Graphic arts - Office automation and IT - Micro-mechanics - Para-medical - Restoration of paintings and sculptures.

In order to illustrate the operation of the exfoliation device fig. 1, we present below the design of the central eraser holder which we will call in the text: Profile guide fig. 6.

This profile guide fig. 6, allows the continuous rotation drive, profiles (11) which will be introduced inside thereof, in order to be able to intervene on all supports: paper, cardboard and other materials for scraping operations, scrubbing, cleaning and in any various irregularities and forms encountered.

The profile guide fig. 6 consists of - a guide and drive body part - 8 - a conical suction turbine - 8 A - a drive gear - 8 B -.

And to ensure the advancement or retreat of the profile (11) - an adjustment nozzle (9 A) or (9 B fig. 9).

In our presentation fig. 6, we opted for the production of a profile guide in a monobloc version.

This significantly reduces the volume of the device, the cost of these parts, ensuring a perfect balance and concentricity of these, as well as the elimination of assembly labor and individual control of each room.

This profile guide fig. 6, will be made according to mechanical constraints, noise, weight etc ... in technical materials: Plastic - Bronze
Steel - Alu etc ...

The guide body - 8 - has 4 straight channels - 12 fig. 7 - arranged inside of it. These 4 channels - 12 - ensure each and every rotation of the guide body - 1 -: 4 functions 1 - Positive drive in rotation of the profile (11) without inter
vention of pliers or clamping cones, usually used for
guide or rotate rigid profiles or
other. But which, by the design of these clamps or cones, requires
exert a clamping pressure, on the outside diameter of these profi
rigid strips, to ensure positive rotation; which is incompa
tible with low hardness profiles, soft and flexible.

Also, the profile rotation drive! 11), will be done through the inter
of the 4 suction channels - 12 - placed inside the
guide body - 1 - and for this purpose, we have provided fig. 11 useful
ser the 4 radiated notches - 13 -, located at the end of each
4 channels - 12 -, opening at the end of the guide body
8 - fig. 6, to ensure following, the partial deformation of the profile
(11) being due to the pressing pressure exerted by the user, on
his work plan) the continuous rotation drive of the profile (11)
fig. 11, thus avoiding possible shearing thereof under the
drive forces for successive rotations.

On the other hand, the rotation of the profile (11) can also be ensured
at the other end of the profile (11), in order to avoid twisting that
this during a resetting operation or following wear of the
profile (11) in its active part. This positive rotation of the pro
yarn (11) being produced by means of the adjustment end piece (9
A) or (9 B), located inside the guide body - 8 - fig. 9.

2 - In order to be assured of an efficient suction, we have located the 4 ca
suction nails - 12 -, arranged 90 apart from each other, on the
outer diameter of the profile (11) and produced inside the
profile guide - 8-.

This offers several advantages
1 / Being as close as possible to the work point 14 fig. he
2 / Vacuum directly on the worktop X fig. 1 and 6
3 / Ensure 4 aspirations on the work surface X fig. 1 and 6 each
profile rotation (11)
4 / Being able to create straight suction channels - 12 - located
inside the diameter entered, suction inlet of the
turbine - 2 -.

3 - Allow absolute sealing over the entire length of the 4 channels
suction - 12 - not opening on the outside diameter of the
guide body - 8 - fig. 7 and thus providing better hold
mechanical end of the guide body - 8 - as well as a discharge
very effective dust up to the suction inlet of the
turbine - 8 B -.

To ensure the cooling of the work support and the active part
profile (11) by the continuous passage of the suction air flow to
the input of the 4 channels - 12 - fig. l1 at the work point - 14 -.

Regarding the turbine - 8 A -, we chose to present the conical version, indeed, it has for this application several advantages
1 / Smaller footprint
2 / Allows better visibility of the point through
to work on the desired surface
3 / Position the turbine - 8 A - as close as possible to the point
suction - 14 - fig. 6
4 / To activate the dust evacuation speed at lbln-
of the turbine - 8 A -.

This 8 A conical suction turbine will consist of several curved blades (at 1200 for example, for 3 blades) fig. 10 which will ensure the aspiration.

These turbine blades - 16 - fig. 10 will be joined on the outside diameter by a frustoconical crown - 15 - fig. 6 she
will have the function
1 / Avoid breaking or vibrating at the ends of the blades
2 / To channel and direct the air and dust flow towards the
turbine outlet - 8 A
3 / Ensure sealing on the periphery of the turbine - 8 A
This tapered crown - 15 - fig. 6 will be attached, in order to simplify the construction of the turbine - 8 A -, and will be according to the material used: Technical plastics - Alu - Steel etc ... assembled on the blades - 16 - fig. 10 of the conical turbine - 8 A -, by ultrasound, by friction, by gluing or other.

 It is understood that a cylindrical turbine version can be envisioned if necessary.

The adjustment nozzle (9 A) or (9 B) fig. 6 and fig. 9 will have on its outside diameter, a thread, possibly sawtooth - 18- fig. 9, in order to improve if necessary, the reaction support of the adjustment end piece (9 A) or (9 B) on the guide body - 8 -.

This thread will allow by rotation, the advancement or retreat of the end piece (9 A) or (9 B) inside the guide body - 8 - causing the advancement or retreat of the profile (11).

This rotation can be obtained by manual rotation, using the screwdriver slot - 19 - fig. 9 or by blocking the rotation of the endpiece (9 A) or (9 B) and rotating the guide body - 8- with the micro-motor (1).

If we want to reinforce the rear blocking, in rotation of the end piece (9 A) we can add a blocking index - 20 - fig. 8, which will be positioned at each rotation in the longitudinal groove - 21 - fig. 8 and fig. 9 and will also make it possible to appreciate each rotation of the adjustment end piece (9 B), during the advancement or retreat of the profile (11) by the operator.

Claims (10)

1 - Motorized gumming device with dust extraction, characterized in that it comprises a guide body allowing the positive drive in rotation of a flexible profile - flexible deformable, more or less abrasive (11) without the use clamps or cones for driving a conical suction turbine - 8 A - with the same drive axis as the guide body. 2 - Exfoliation device according to claim 1 characterized in that the guide body - 8 - has in its internal diameter 4 channels - 12 arranged 900 from each other and ensuring each and each rotation of the guide body - 8 - 4 functions  1 / the positive drive in rotation of the profile (11) over 900 minimum,  by each of the 4 radiated notches - 13  2 / the release by continuous suction of the dust engen  wear and tear of the profile (11) on the work surface  3 / the final evacuation of this dust by continuous suction  to the suction inlet - 23 - of the turbine - 8 A  4 / cooling the active part of the profile (11) and the support  (paper - plastic etc) used, being caused by the passage  of the air flow drawn into the work point at the inlet of the 4  channels - 12 -, by the turbine - 8 A 3 - Exfoliation device, according to claim 2 characterized in that the 4 channels - 12 - ensure the continuous positive rotation of the profile (11) via the 4 radiated notches - 13 - located at the end of the 4 suction channels - 12 - opening onto the front of the guide body - 1 -. This avoids permanent stress on the profile (11) during the shutdown of the device. 4 - Exfoliation device according to any one of claims 2 and 3 characterized in that the 4 channels - 12 - fig. 7 allow, ensuring the continuous evacuation of the wear dust from the profile (11) from the point of cleaning, exfoliation, etc., and this, up to the suction inlet - 23 of the turbine - 8 A -. These 4 channels having no opening in section on the outside of the guide body - 8 - fig. 7. 5 - Exfoliation device according to any one of claims 1 to 4 characterized in that the guide body - 8 - fig. 6 provides linear guidance over the entire length of the profile (11) and free cross-sectional centering of the profile (11) allowing the profile (11) to rotate without constraint inside the guide body - 1 - fig. 6, in the rest position. 6 - Exfoliation device according to any one of claims 2 to 5 characterized in that the 4 suction channels - 12 - fig. 7 are located inside the diameter of the intake inlet of the turbine - 2 -. 7 - Exfoliation device according to any one of claims 1 to 6 characterized in that the suction turbine - 8 A - integral with the guide body - 8 - continuously ensures the suction of the wear dust from the profile (11) and of the worked surface. 8 - Exfoliation device according to any one of claims 1 to 7 characterized by the ability to rotate the profile (11) in rotation on itself, which ensures the cleaning and profiling of the active part of the profile (11) after use, very easily. 9 - Exfoliation device according to any one of claims 1 to 8 characterized in that the guide body - 8 - is of one-piece design with the turbine - 8 A - and the gear - 8 B - allows perfect centering and balance of masses in rotational movement to obtain high precision at the point of intervention. 10 - Exfoliation device according to any one of claims 1 to 9 characterized in that an adjustment end piece (9 A) or (9 B) ensures on the rear part of the profile (11) the positive rotation of the latter ci and the manual or semi-automatic advance or retreat of the profile (11) inside the guide body - 8 -.