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Numéro de publicationUSRE45067 E1
Type de publicationOctroi
Numéro de demandeUS 12/708,806
Date de publication12 août 2014
Date de dépôt19 févr. 2010
Date de priorité14 juin 2005
État de paiement des fraisPayé
Autre référence de publicationDE06290969T1, DE202006020789U1, EP1749670A1, EP1749670B1, EP2221183A1, EP2221183B1, US7332037, US20070064030
Numéro de publication12708806, 708806, US RE45067 E1, US RE45067E1, US-E1-RE45067, USRE45067 E1, USRE45067E1
InventeursEdmond Abergel, Raphael Renaud
Cessionnaire d'origineMgi France
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Numerical jet machine for the application of a coating onto a substrate
US RE45067 E1
Résumé
The invention concerns a contactless numerical printing machine for products of average fluidity, such as varnish, glue, and conducting or scratchable ink, onto a substrate of variable thickness and dimensions. The machine includes a special device for printing without contact by projection. The projected materials are materials of average fluidity or composed of large-dimension molecules. The process used includes an electro-acoustic device for control of the projection, and a multiplicity of projection nozzles, each controlled individually.
The machine also includes a production chain with different work stations, whose printing devices are controlled by a computer management system. The production chain allows printing with a certain precision in given zones located during the processing by an appropriate work station.
Images(3)
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Revendications(34)
The invention claimed is:
1. A numerical jet machine for viscous material product for the application of a coating to a plastic face of a substrate, including:
a reservoir configured for including a viscous product having viscosity between 100 and 1000 centipoises,
an input magazine and an output magazine,
work stations and a computer device to manage the operations on each of the work stations,
a movement device for moving the substrate between the different work stations,
a device for grasping and transferring the substrate from the input magazine to the movement device and from the movement device to the output magazine,
further comprising at leastsaid work stations comprising at least:
a read station for reading and determining at least one position of the substrate and/or of markers placed on the substrate,
aan application station including a series of plural nozzles arranged in a ramp, each of the nozzles including a hollow needle, a piezoelectric actuator affixed to a resonator formed by an assembly included in each hollow needle,
a drying station with an infra-red or heated air current of UV drying oven; ,
wherein each hollow needle is piloted separately by a command the computer device, and is arranged to be fed from said reservoir configured for including said viscous product to be applied onto the substrate during relative movement between the substrate and the application station, to apply the product in a given zone on the substrate,
wherein each hollow needle is arranged to be vibrated by its associated piezoelectric actuator, with the excitation of the actuator, in duration and power, determining the dimensions and the shape of the drop of viscous product, to apply the product in a given application zone on the substrate, said application zone being defined for each substrate by a configuration file concerning the zone shape, the zone position on the substrate in relation to the position determined by the read station, the quantity of product to be applied,
wherein of the management computer device is arranged to be responsive to an established programming said configuration file for controlling the command device of the application station according to the position translate the information into parameters of relative movement of the substrate, to the read station and to the drying station with the management of the nozzles, and selective control of the information received at the different work stations to coordinate the operations each actuator of each nozzle.
2. A machine according to claim 1, wherein the application zone is specified for each substrate by a configuration file concerning the shape of the zone, the position of the zone on the substrate in relation to the substrate markers position determined by the read station, the quantity of product to be applied, with a machine control program arranged to use this information for translating the information into parameters of relative movement of the substrate and of the nozzles, for selective control of the nozzles and for reiteration of the offset passage of the substrate in front of the nozzles to produce joined-up lines if necessary.
3. A machine according to claim 1, wherein the ramp in which the nozzles are arranged is equipped with a movement resource in relation to the medium the substrate defining said relative movement between the substrate and the application station.
4. A machine according to one of claim 1, wherein the said application site zone on the substrate is specified by the relative movement of the substrate in relation to the ramp on which the nozzles are arranged.
5. A machine according to one of claim 1, wherein the product is glue and the drying station includes a heated air current source.
6. The machine according to claim 5 in combination with an independent printing station or of a station for installing an electronic chip on the substrate, wherein the machine is disposed upstream or downstream of the independent printing station or of a station for installing an electronic chip on the substrate.
7. The combination according to claim 6, wherein the a first machine is disposed upstream of the printing station, for applying glue in a zone other than the zone receiving the printing, and the a second machine is disposed downstream of the printing station for applying varnish on the printed part.
8. The combination according to claim 6, wherein the a second machine is disposed upstream of the printing station for applying varnish in a zone other than the zone receiving the printing, and the a first machine is disposed downstream of the printing station for applying glue in a third zone.
9. The combination according to claim 6, wherein the a first machine is disposed upstream of the station for the installation of an electronic chip on the substrate applying glue in the zone intended to receive the chip.
10. A machine according to one of claim 1, wherein the product is an aqueous varnish and the drying station includes an infra-red source.
11. The machine according to claim 10 in combination with an independent printing station or of a station for installing an electronic chip on the substrate, wherein the machine is disposed upstream or downstream of the independent printing station or of a station for installing an electronic chip on the substrate.
12. A machine according to one of claim 1, wherein the product is a scratchable opaque ink and the drying station includes a heated air current source.
13. A machine according to one of claim 1, further comprising a device for pressuring the product to be applied.
14. A machine according to claim 5, wherein the work stations further comprise an additional station for assembling different parts together, in the case of application of glue to contact zones.
15. A machine according to claim 1, wherein the substrate is paper with an aqueous ink printed thereon prior to application of viscous product.
16. A numerical jet machine for the application of a viscous product on a substrate, comprising:
a reservoir configured for including a viscous product having viscosity between 100 and 1000 centipoises;
an input magazine and an output magazine;
one or more work stations and a computer device to manage the operations on each of the work stations;
a movement device for moving the substrate between the work stations;
a device for grasping and transferring the substrate from the input magazine to the movement device and from the movement device to the output magazine;
said one or more work stations including:
a read station for reading and determining at least one position of the substrate and/or of markers placed on the substrate;
a drying station; and
an application station comprising a series of nozzles arranged in a ramp, each nozzle being:
separately controllable by the computer device,
actuable by a piezoelectric actuator, and
arranged to be fed from the reservoir configured for including said viscous product to be applied onto the substrate during relative movement between the substrate and the application station, to apply the product in a given application zone on the substrate,
said computer device managing the operations on each of the work stations according to the position of the substrate, to the read station and to the drying station, and/or with the management of the information received at the different work stations to coordinate the operations; and
said application zone being defined for each substrate by a configuration file concerning the zone shape, the zone position on the substrate in relation to the position determined by the read station, the quantity of product to be applied, the computer device arranged to be responsive to the configuration file to translate the information into parameters of relative movement of the substrate and of the nozzles, and selective control of each actuator of each nozzle.
17. A machine according to claim 16, wherein the computer device is arranged to control a reiterated driving of the same substrate in front of the nozzles to produce jointed lines.
18. A machine according to claim 16, wherein the computer device is arranged to control the excitation of the actuator, in duration and power, to determine the dimensions and the shape of a viscous product drop in accordance with an average viscosity of the product.
19. A machine according to claim 16, wherein the ramp is provided with a movement device in relation to the substrate defining said relative movement between the substrate and the application station.
20. A machine according to claim 16, wherein the application zone on the substrate is defined by the relative movement of the substrate in relation to the ramp.
21. A machine according to claim 16, wherein the viscous product is a glue and the drying station comprises a heated air source.
22. The machine according to claim 21 in combination with an independent printing station or of a station for installing an electronic chip on the substrate, one or more of the machines disposed upstream or downstream of the independent printing station or of a station for installing an electronic chip on the substrate.
23. The combination according to claim 22, further comprising a first machine, using a glue as viscous product and disposed upstream of the independent printing station, for applying glue in a zone other than a printing zone receiving the printing, and a second machine using a varnish disposed downstream of the printing station for applying varnish on the printing zone.
24. The combination according to claim 22, further comprising a second machine, using a varnish as viscous product and disposed upstream of the independent printing station for applying varnish in a zone other than a printing zone receiving the printing, and a first machine disposed downstream of the printing station for applying glue in a third zone.
25. The combination according to claim 22, further comprising a first machine, using a glue as viscous product and disposed upstream of the station for the installation of an electronic chip on the substrate applying glue in the zone which is to receive the chip.
26. The combination according to claim 22, the machine disposed downstream of the printing station for applying varnish on a printed portion of the substrate, further comprising a second machine using varnish as viscous product arranged upstream of the printing station for applying varnish in a zone other than a printing zone receiving the printing.
27. The combination according to claim 22, wherein the device for grasping and transferring is adapted for a plastic substrate and the viscous product is adapted for a plastic substrate.
28. A machine according to claim 21, wherein the work stations further comprise an additional station for assembling different parts together, in the case of application of glue to contact zones.
29. A machine according to claim 16, wherein the viscous product is an aqueous varnish and the drying station comprises an infra red source.
30. A machine according to claim 16, wherein the viscous product is a scratchable opaque ink and the drying station comprises a heated air flow source.
31. A machine according to claim 16, comprising a device pressuring the viscous product to be applied.
32. A numerical jet machine for the application of a coating of varnish on a substrate, comprising:
a reservoir including a varnish having viscosity between 10 and 1000 centipoises;
an input magazine and an output magazine;
one or more work stations and a computer device to manage the operations on each of the work stations;
a movement device for moving the substrate between the work stations;
a device for grasping and transferring the substrate from the input magazine to the movement device and from the movement device to the output magazine;
said one or more work stations comprising:
a read station for reading and determining at least one position of the substrate and/or of markers placed on the substrate;
a drying station; and
an application station comprising a series of nozzles arranged in a ramp; each nozzle being:
separately controllable by the computer device,
actuable by a piezoelectric actuator, and
arranged to be fed from the reservoir including said viscous product to be applied onto the substrate during relative movement between the substrate and the application station, to apply the product in a given application zone on the substrate,
said computer device managing the operations on each of the work stations according to the position of the substrate, to the read station and to the drying station, and/or with the management of the information received at the different work stations to coordinate the operations; and
said application zone being defined for each substrate by a configuration file concerning the zone shape, the zone position on the substrate in relation to the position determined by the read station, the quantity of product to be applied, the computer device arranged to be responsive to the configuration file to translate the information into parameters of relative movement of the substrate and of the nozzles, and selective control of each actuator of each nozzle.
33. A numerical jet machine as claimed in claim 32, wherein the reservoir includes a varnish having viscosity between 100 and 1000 centipoises.
34. A numerical jet machine as claimed in claim 32, wherein the reservoir includes a varnish having viscosity greater than 10 and less than or equal to 1000 centipoises.
Description
RELATED APPLICATIONS

The present application is a reissue of U.S. patent application Ser. No. 11/423,761, filed Jun. 13, 2006, the disclosure of which is hereby incorporated by reference herein in its entirety.

RELATED APPLICATIONS

The present application is based on, and claims priority from, FR Application Number 0505981, filed Jun. 14, 2005, the disclosure of which is hereby incorporated by reference herein in its entirety.

BRIEF SUMMARY OF THE INVENTION

The invention concerns the area of printing without physical contact onto a substrate of which at least one face is in plastic, and more particularly a machine, independent from a printing system, which allows, before or after the printing system, the application by jet of a product having a viscosity going up to 1000 centipoises, and described as average to large, such as varnish, glue, conducting or scratchable ink, onto a substrate of variable thickness and dimensions.

There already exist jet printing systems operating with inks whose viscosity is low and of the order of ten or so centipoises.

The existing systems use different techniques to project a bubble of ink onto the medium. According to a first technique, the ink contained in a nozzle is expelled by a pressure created by a gaseous bubble formed at a heating resistance which creates a chemical reaction by converting the ink to the gaseous state. Another technique to create pressure is to use a piezo-electric component which curves inward under the effect of an electric voltage, so as to reduce the volume of the ink reservoir. A droplet of ink is thus expelled from the nozzle.

These systems are however limited to inks or products with a controlled fluidity and a low viscosity as well as molecules of very small dimension. For example, it is not possible with the existing appliances to apply, without contact with the medium, products such as varnish, scratchable ink, conducting ink or glue, in particular onto a plastic substrate or the plastic face of a substrate.

Up to the present, the application of such products onto substrates, possibly plastic or of which one face is plastic coated, has been done by spreading and not by projection, which renders complex the application to only a portion of surface of the substrate.

In addition, there is a real need, in particular for customisation purposes or to render documents hard to falsify, to be able to apply a layer of product easily onto a substrate, possibly with a plastic face, in a given zone, before or after printing of the substrate.

BACKGROUND OF THE INVENTION

The present invention therefore has as its objective to overcome one or more of the drawbacks of previous designs by creating a machine that can be used to apply, without contact, onto a portion of a substrate, products or inks of average fluidity, such as varnish, glue, conducting or scratchable ink, onto a substrate of variable thickness and dimensions.

This objective is attained using a numerical jet machine for a viscous material, for the application of a coating onto a plastic face of a substrate, including an input magazine and an output magazine, a computer device to manage the operations on each of the work stations, a device for moving the substrate between the different work stations, a device for grasping and transferring the substrate from the input magazine to the movement device and from the movement device to the output magazine, wherein it includes at least:

    • a read station which reads and determines at least one position of the substrate and/or of markers placed on the substrate,
    • an application station composed of at least a series of nozzles arranged in a ramp, each nozzle being piloted separately by a command device, and fed from a reservoir containing product with medium or high viscosity to be projected onto the substrate during a relative movement between the substrate and the application station, to effect the application of the product in a given zone of the substrate, with the nozzles being hollow needles each made to vibrate by a piezoelectric actuator affixed to a resonator formed by the assembly of the hollow needle, with the excitation of the actuator in duration and power determining the dimensions and the shape of the drop of material of medium or high viscosity,
    • a drying station with an infra-red or heated air current or UV drying oven,

with the control of the command device of the application station according to the position of the substrate, to the read station and to the drying station, and/or with the management of the information received at the different work stations to coordinate the operations, being effected by the management computer device in accordance with an established programming file.

According to another particular feature, the zone of application is specified for each substrate by a configuration file concerning the shape of the zone, its position on the substrate in relation to the substrate markers, the quantity of product to be projected, a machine control program making use of this information in order to translate it into parameters of relative movement of the substrate and of the nozzles, for selective control of the nozzles and of reiteration of offset passage of the substrate in front of the nozzles to produce joined-up lines if necessary.

According to another particular feature, the ramp in which the nozzles are arranged is equipped with a movement device in relation to the medium.

According to another particular feature, the projection site on the substrate is specified by the relative movement of the substrate in relation to the ramp in which the nozzles are arranged.

According to another particular feature, the product is glue and the drying is by heated air current.

According to another particular feature, the product is an aqueous varnish and the drying is by infra-red.

According to another particular feature, the product is a scratchable opaque ink and the drying is by heated air current.

According to another particular feature, the machine includes a device for pressurizing the product to be projected.

Another objective is to propose the use of this machine in a system for the preparation of identification documents (identity card, passport, driving license, etc.) or security documents (access badge, payment card, access key, etc.).

This objective is attained by the combination of a machine according to the invention, used upstream or downstream of an independent printing station or of a station for the installation of an electronic chip on the substrate.

According to another particular feature, the machine according to the invention is used upstream of the printing station for the application of glue in a zone other than that receiving the printing and a second machine is used downstream of the printing station for the application of a varnish on the printed part.

According to a variant, the machine is used upstream of the printing station for the application of varnish in a zone other than the zone receiving the printing and a second machine is used downstream of the printing station for the application of glue in a third zone.

According to a variant, the machine is used upstream of the station for the installation of an electronic chip on the substrate for the application of glue in the zone intended to receive the chip.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

The invention, its characteristics and its advantages will appear more clearly on reading the description that follows with reference to the figures listed below:

FIG. 1 represents an example of an automated device for printing onto media;

FIG. 2 represents an example of a projection device;

FIG. 3 represents examples of projection patterns on media;

FIG. 4 schematically represents a configuration for the use of two machines according to the invention.

DETAILED DESCRIPTION

Let us first consider FIG. 1. The machine is controlled by a control computer (10) which controls the different work stations, and also which collects the information from the different sensors. For example, the sensors give information on the positions of the substrates (13), on the configuration data of the substrates (13) or on the validation information following an operation, effected correctly or not. The substrates (13) awaiting printing are placed in an input magazine (5) with a capacity specified according to the nature of the substrate (13) and of the printing needs. In one implementation example, the input magazine (5) is designed to accept several thousand substrates (13) of variable nature, of variable thickness up to 800 μm and of variable dimensions (credit-card format up to format AO) and possibly of which at least one face is in plastic. Once the application process has ended, the substrates (13) are stored in an output magazine (8) with generally the same capacity as the input magazine (5). A device for grasping (4) the substrates (13) is used to extract the substrates (13) from the input magazine (5) and to place them on a conveyor in order to move them along a working chain with several work stations. The first work station of the chain is a margin stop (6) with indexing of the substrate (13) which allows positioning in relation to two reference edges or the detection of a printed marker on the substrate (13). A sensor detects the position information and sends it to the computer by a cable or wireless network. This information, stored in memory in the computer, will then be reused by other work stations controlled by the computer. Checks are also performed in order to detect the presence of a substrate (13) unique to each station on the conveyor.

The next work station is the projection device (2, 9) for application of the product to the medium. The contactless projection device (2, 9) is detailed in FIG. 2. The projection device includes a reservoir (9) which contains the viscous product to be projected. Non limiting examples of products contained in the reservoir are varnish, scratchable ink, conducting ink or glue whose average viscosity is between 100 and 1000 centipoises, that is much higher than the viscosity of printing inks, which are normally ten or so centipoises. The feeding of the reservoir not shown is effected, for example, manually or automatically by a feed circuit or indeed of semi-automatically by device controlled by an operator. The reservoir (9) is connected to a pressurising device (10). In fact, the projection system requires a given pressure for correct operation. The pressurising device therefore includes means to control and regulate the pressure of the product sent to the nozzles, and in a non limiting manner controlled by the computer. The nozzles fed directly by the pressurising device (10) are all controlled individually by a nozzle control device (11), in a non-limiting manner controlled by the computer. The nozzles are aligned and assembled on a ramp, thus forming a ramp of nozzles (12). Each nozzle is composed of the end of a hollow needle which is made to vibrate by a piezoelectric actuator affixed to the resonator formed by the assembly of the hollow needle on the ramp. The control of each nozzle is an electro-acoustical process, meaning that the product is projected by a vibration controlled by electric excitation. The nozzles spaced by 0.1 to 0.5 mm thus allow to cover a precise surface.

The application zone is specified for each substrate by a configuration file contained in a memory zone of the computer, concerning the shape of the zone, its position on the substrate in relation to the substrate markers, the quantity of product to be projected, a machine control program making use of this information in order to translate it into parameters of relative movement of the substrate and of the nozzles, selective control of the nozzles and reiteration of the offset passage of the substrate in front of the nozzles to produce joined-up lines if necessary.

The next station of the projection machine is the drying oven (7). The oven (7) is used to fully or partly dry the projected product. The drying, according to the applied product, can be performed by an infra-red radiation in the case of an aqueous varnish or by a heated air-current for glue or an scratchable ink or by UV, according to the projected product. The drying then allows the substrate (13) to be stored in the output magazine (8), so that the projected product is not transferred onto other substrates (13) or onto the magazine (8) with which the substrate (13) is in contact.

FIG. 3 gives non-limiting examples of applications effected by projection onto substrates (13). Thus the application of a layer of varnish (14) is effected onto a face either before or after printing. For example, a layer of varnish occupies a zone on the substrate that is more or less rectangular, and whose corners are rounded. In a non-limiting manner, a margin not covered with projected product is left on the periphery of the face of the substrate. On a zone (16, FIG. 3) of a substrate, a layer of thermally reactivable glue is placed in a pattern, such as a small rectangle rounded at the corners. For example different patterns of scratchable ink (15) are applied to other zones, such as an arrow or a star for example, or any other pattern with, in a non-limiting manner, an outline formed of angles and straight or curved lines.

With reference to FIG. 4, by the use of two machines, one (1A) before the printing, the other (1B) after printing, and loading the reservoirs of these machines with the appropriate viscous products, different printings are effected, in a non-limiting manner, on two faces of a substrate. These printings can be zones that are printed and protected by a varnish for example, zones printed and covered with an scratchable ink or zones coated with glue or indeed a combination of these different options on any face. Printing on the different faces is effected by a turning mechanism (not shown) between one machine and the next or previous machine.

Electro-acoustic control is used to adjust the projection of material in terms of duration and power. The application zones are then determined by this numerical process with a precision of the order of 0.1 mm. The machine can therefore apply a point or indeed can cover the whole surface of a substrate. The application zone is specified for each substrate by a configuration file concerning the shape of the zone, its position on the substrate in relation to the substrate markers, the quantity of product to be projected. A machine control program uses this information in order to translate it into parameters of relative movement of the substrate and of the nozzles, parameters for selective control of the nozzles and parameters for reiteration of the offset passage of the substrate in front of the nozzles to produce joined-up lines if necessary.

In another embodiment example, the working chain includes other additional work stations allowing, for example, the assembly of different parts together, in the case of application of glue to the specified contact zones it should be obvious to people well-versed in this area that this present invention allows methods of implementation in many other specific forms without moving outside the range of application of the invention as claimed. As a consequence, the present methods of realisation should be seen as illustrations only, and can be modified within the area specified by the scope of the attached claims, and the invention should not be limited to the details given above.

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Classifications
Classification aux États-Unis118/685, 438/674, 347/12, 347/74, 347/40, 118/686, 118/695, 118/692, 347/9, 347/84, 700/123, 347/4, 700/119, 700/121
Classification internationaleB41J2/07, B05C11/00, B41J2/15, B41J2/17, B41J29/38, H01L21/44, B41J2/16, B41J2/045, G06F19/00, B41J2/145, B41J2/14
Classification coopérativeB41J3/407, B41J11/002, B41J2/14201
Événements juridiques
DateCodeÉvénementDescription
19 août 2015FPAYFee payment
Year of fee payment: 8
1 août 2017ASAssignment
Owner name: MGI DIGITAL TECHNOLOGY, FRANCE
Free format text: CHANGE OF NAME;ASSIGNOR:MGI FRANCE;REEL/FRAME:043403/0636
Effective date: 20150625