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EP0944478A1 - Device for stabilising the tension of the paper ribbon in an ink-jet vertical plotter for tracing shapes for cloths - Google Patents

Device for stabilising the tension of the paper ribbon in an ink-jet vertical plotter for tracing shapes for cloths

Info

Publication number
EP0944478A1
EP0944478A1 EP97943088A EP97943088A EP0944478A1 EP 0944478 A1 EP0944478 A1 EP 0944478A1 EP 97943088 A EP97943088 A EP 97943088A EP 97943088 A EP97943088 A EP 97943088A EP 0944478 A1 EP0944478 A1 EP 0944478A1
Authority
EP
European Patent Office
Prior art keywords
roller
ribbon
dragging
supporting
stabilising
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97943088A
Other languages
German (de)
French (fr)
Other versions
EP0944478B1 (en
Inventor
Matteo Cattabriga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Algotex SRL
Original Assignee
Algotex SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Algotex SRL filed Critical Algotex SRL
Publication of EP0944478A1 publication Critical patent/EP0944478A1/en
Application granted granted Critical
Publication of EP0944478B1 publication Critical patent/EP0944478B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/16—Means for tensioning or winding the web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4078—Printing on textile

Definitions

  • the present invention relates to the technical field concerning apparatuses for printing of digitised drawings (plotters) .
  • the present invention relates to an improved ink-jet vertical plotter, fit to trace shapes, particularly designed to be used for cloths cutting, on a paper medium or on a similar support.
  • Ink-jet plotters of such type carry out the shape tracing by means of a print head which slides horizontally and crosswise with respect to the paper ribbon, very close to a face thereof. Said head is operated for reciprocally crossing the ribbon along its width, printing the dots which define the shapes outline.
  • the ribbon is supported by a motor driven supporting and dragging roller, which is part of a complex, step driven paper dragging system, operated during the print head stops.
  • a motor driven supporting and dragging roller which is part of a complex, step driven paper dragging system, operated during the print head stops.
  • Each feeding step width is equal to the head printing width, and it is defined by an encoder, which detects the supporting roller rotation.
  • the dragging system in addition to said dragging roller, usually comprises: a feeding free roller, fit to receive a web of paper or any other suitably medium wherein shapes can be traced, placed downstream of said dragging roller, with respect to the feed direction of the ribbon; a counter-rotating roller, parallel and in contact with the same, cooperating therewith for dragging the ribbon; a motor driven ribbon rewind roller, placed downstream of the aforesaid dragging roller and print head, fit to rewind the paper ribbon after the shapes have been traced.
  • the above described plotters require that the ribbon tension during the dragging step is as constant as possible, in order to guarantee a correct and accurate shape tracing. Since the ribbon feeding step comes suddenly, the same ribbon is subject to fast accelerations, and its tension tends to lower, even because of the feeding web inertia. This can lead to variable ribbon feeding steps, as well as to some possible ribbon breaking.
  • the known paper dragging systems in order to avoid the aforesaid drawbacks, are provided with a ribbon tension stabiliser, usually consisting of a "lung”, comprising a plurality of free rotating rollers, interposed between the feeding roller and the dragging roller, placed parallel thereof and at different heights, around which wraps the ribbon.
  • At least one of the free rollers is vertically slidable along a guide made in the plotter frame. Said roller is fit to damp the stretch exerted on the ribbon by the dragging roller during the feeding steps, and to exert in turn a stretch on the ribbon during the stop periods, thus stabilising the ribbon tension.
  • the ribbon tension stabilisers as the one above described are usually complex, expensive and not easy to use. Substituting the feeding web is normally very complex and requires a long execution time.
  • a further object of the present invention is to propose a device for stabilising the ribbon tension, which moreover allows to simplify the feeding web substitution operations, and which is also reliable and easy to maintain.
  • a tension stabilising device which consists of an oscillating tensioning roller, interposed between a feeding web of a continuous ribbon, and a roller for supporting and dragging said ribbon, said tensioning roller being supported by the upper face of said ribbon, being also hinged to a pair of oscillating arms, and being fit to exert on said ribbon a substantially constant force, against the dragging force exerted by said support and dragging roller.
  • FIG. 1 shows a schematic, perspective view of a paper dragging system in a plotter for tracing of shapes for cloths, provided with a tension stabilising device according to the present invention
  • FIG. 1 shows a schematic, cross sectional view of the dragging system of Figure 1.
  • numeral 30 indicates a stabilising device for stabilising the tension of a paper ribbon, or other similar support medium, in an ink-jet, vertical plotter for tracing shapes for cloths.
  • Said plotter is provided with a paper dragging system 1, fit to take a paper ribbon 2 from a web 3, and to route it as far as a printing head 4, of known type.
  • a paper dragging system 1 fit to take a paper ribbon 2 from a web 3, and to route it as far as a printing head 4, of known type.
  • Head 4 is reciprocally operated, and it is fit to trace on the ribbon 2, according to known techniques, shapes 6 for cloths cutting.
  • the paper dragging system 1 comprises a feeding roller 10, a motor driven support and dragging roller 11, provided with a respective counter-rotating roller 12, and a rewind roller 13, all arranged upstream to downstream with respect of a feed direction W of the ribbon 2.
  • Said rollers are horizontally placed inside the vertical plotter, according to known arrangements, which are designed for optimising the plotter size and the ribbon 2 path.
  • the feeding roller 10 can freely rotate about its axis, and it carries the web 3.
  • the supporting and dragging roller 11 supports and drags the ribbon 2, in cooperation with the counter-rotating roller 12, along the feed direction W, and routes it up to a printing position just underneath the head 4.
  • the supporting and dragging roller 11 is step operated, in a phase relationship with the motion of the head 4. More precisely, it is operated during the head 4 stops, occurring during its motion reversals.
  • the rewind roller 13, also motor driven and rotating in a phase relationship with the supporting and dragging roller 11, is approximately placed on the same vertical plane as this latter, underneath of it, and receives the ribbon 2 downstream of the head 4.
  • the tension stabilising device 30 is interposed between the web 3 and the support and dragging roller 11; it consists of an oscillating tensioning means, supported by the upper face 2a of the ribbon 2. It is fit to apply a substantially constant force to the ribbon 2, against the dragging force applied by the supporting and dragging roller 11. Since its weight is applied to the ribbon 2, the tensioning means tends to form a bend in the portion thereof comprised between the web 3 and the supporting and dragging roller 11.
  • the tension stabilising device 30 comprises a tensioning roller 33, placed on the upper face 2a of the ribbon 2 and parallel with respect to the dragging roller
  • the tensioning roller 33 is coupled at its ends to respective ends 35a, 35b of a pair of swinging arms
  • 34a, 34b are placed sideways and above the web 3, and they are hinged at their opposite ends 36a, 36b, which lay on the same vertical plane of the feeding roller 10.
  • Arms 34a, 34b cooperate to keep the tensioning roller 33 parallel to the supporting and dragging roller 11, and to allow the tensioning roller 33 to move along an arc of the circle L whose radius is equal to the length of arms
  • the tensioning roller 33 is preferably fixed to the arms 34a, 34b, but it can be advantageously made free to rotate about its axis, in order to help sliding the ribbon 2.
  • the advantages of the present invention mainly consist of stabilising the ribbon 2 tension by means of a simple device, made with a single tensioning roller 33, and thus being extremely reliable and cheap.
  • a further advantage is to obtain, together with a easy operating device, a great simplification in the plotter maintenance and in the web changing operations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
  • Recording Measured Values (AREA)

Abstract

The device for stabilising the tension of a paper ribbon (2) is arranged in an ink-jet, vertical plotter, for tracing shapes for cloths. Said plotter is provided with a paper dragging system (1) comprising: a feeding roller (10), supporting a feeding web (3); a supporting and dragging roller (11), supporting said ribbon (2) near a printing head (4), and dragging said ribbon (2); a rewind roller (13), receiving said ribbon (2). The aforesaid device consists of oscillating tensioning means (30), which operates on the upper face (2a) of said ribbon (2), and which exerts on this latter a substantially constant force, against the dragging force exerted by the supporting and dragging roller (11).

Description

DEVICE FOR STABILISING THE TENSION OF THE PAPER RIBBON IN AN INK- ET VERTICAL PLOTTER FOR TRACING SHAPES FOR CLOTHS,
TECHNICAL FIELD
The present invention relates to the technical field concerning apparatuses for printing of digitised drawings (plotters) .
Particularly, the present invention relates to an improved ink-jet vertical plotter, fit to trace shapes, particularly designed to be used for cloths cutting, on a paper medium or on a similar support.
BACKGROUND ART
It is known that the cloths cutting operation for making garments requires that suitable shapes have to be used. Said shapes are often generated by means of computers and of automatic tracing devices (plotters) . These are fit to print said shapes on a support like paper or a similar medium, which is provided in form of single sheets or of a continuous ribbon supplied on a web. Generally, vertical, ink-jet plotters using a continuous ribbon of paper are preferably used, because of their small size and of their tracing speed.
Ink-jet plotters of such type carry out the shape tracing by means of a print head which slides horizontally and crosswise with respect to the paper ribbon, very close to a face thereof. Said head is operated for reciprocally crossing the ribbon along its width, printing the dots which define the shapes outline.
The ribbon is supported by a motor driven supporting and dragging roller, which is part of a complex, step driven paper dragging system, operated during the print head stops. Each feeding step width is equal to the head printing width, and it is defined by an encoder, which detects the supporting roller rotation.
The dragging system, in addition to said dragging roller, usually comprises: a feeding free roller, fit to receive a web of paper or any other suitably medium wherein shapes can be traced, placed downstream of said dragging roller, with respect to the feed direction of the ribbon; a counter-rotating roller, parallel and in contact with the same, cooperating therewith for dragging the ribbon; a motor driven ribbon rewind roller, placed downstream of the aforesaid dragging roller and print head, fit to rewind the paper ribbon after the shapes have been traced.
Italian Utility Model N. 217.771 and Patent N. 1.233.497, in the name of the same Applicant, disclose some improvements to plotters for tracing of shapes for cloths.
In fact, the above described plotters require that the ribbon tension during the dragging step is as constant as possible, in order to guarantee a correct and accurate shape tracing. Since the ribbon feeding step comes suddenly, the same ribbon is subject to fast accelerations, and its tension tends to lower, even because of the feeding web inertia. This can lead to variable ribbon feeding steps, as well as to some possible ribbon breaking. The known paper dragging systems, in order to avoid the aforesaid drawbacks, are provided with a ribbon tension stabiliser, usually consisting of a "lung", comprising a plurality of free rotating rollers, interposed between the feeding roller and the dragging roller, placed parallel thereof and at different heights, around which wraps the ribbon. At least one of the free rollers is vertically slidable along a guide made in the plotter frame. Said roller is fit to damp the stretch exerted on the ribbon by the dragging roller during the feeding steps, and to exert in turn a stretch on the ribbon during the stop periods, thus stabilising the ribbon tension.
The ribbon tension stabilisers as the one above described are usually complex, expensive and not easy to use. Substituting the feeding web is normally very complex and requires a long execution time.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to propose a device for stabilising the paper ribbon tension, said device being mounted on an ink-jet plotter for tracing shapes for cloths, which allows to overcome all the above described drawbacks, and which is of simple and cheap construction.
A further object of the present invention is to propose a device for stabilising the ribbon tension, which moreover allows to simplify the feeding web substitution operations, and which is also reliable and easy to maintain.
All the aforesaid objects are achieved, according to the Claims contents, by a tension stabilising device which consists of an oscillating tensioning roller, interposed between a feeding web of a continuous ribbon, and a roller for supporting and dragging said ribbon, said tensioning roller being supported by the upper face of said ribbon, being also hinged to a pair of oscillating arms, and being fit to exert on said ribbon a substantially constant force, against the dragging force exerted by said support and dragging roller.
BRIEF DESCRIPTION OF THE DRAWINGS
The characteristic features of the invention are set out in the following, with particular reference to the accompanying drawings, in which:
- Figure 1 shows a schematic, perspective view of a paper dragging system in a plotter for tracing of shapes for cloths, provided with a tension stabilising device according to the present invention;
- Figure 2 shows a schematic, cross sectional view of the dragging system of Figure 1.
BEST MODE OF CARRYING OUT THE INVENTION
Referring now to said figures, numeral 30 indicates a stabilising device for stabilising the tension of a paper ribbon, or other similar support medium, in an ink-jet, vertical plotter for tracing shapes for cloths.
Said plotter is provided with a paper dragging system 1, fit to take a paper ribbon 2 from a web 3, and to route it as far as a printing head 4, of known type. This is schematically shown in the accompanying drawings, and is slidable along a suitable horizontal support 5. Head 4 is reciprocally operated, and it is fit to trace on the ribbon 2, according to known techniques, shapes 6 for cloths cutting.
The paper dragging system 1 comprises a feeding roller 10, a motor driven support and dragging roller 11, provided with a respective counter-rotating roller 12, and a rewind roller 13, all arranged upstream to downstream with respect of a feed direction W of the ribbon 2. Said rollers are horizontally placed inside the vertical plotter, according to known arrangements, which are designed for optimising the plotter size and the ribbon 2 path.
The feeding roller 10 can freely rotate about its axis, and it carries the web 3. The supporting and dragging roller 11 supports and drags the ribbon 2, in cooperation with the counter-rotating roller 12, along the feed direction W, and routes it up to a printing position just underneath the head 4.
The supporting and dragging roller 11 is step operated, in a phase relationship with the motion of the head 4. More precisely, it is operated during the head 4 stops, occurring during its motion reversals.
The rewind roller 13, also motor driven and rotating in a phase relationship with the supporting and dragging roller 11, is approximately placed on the same vertical plane as this latter, underneath of it, and receives the ribbon 2 downstream of the head 4.
The tension stabilising device 30 is interposed between the web 3 and the support and dragging roller 11; it consists of an oscillating tensioning means, supported by the upper face 2a of the ribbon 2. It is fit to apply a substantially constant force to the ribbon 2, against the dragging force applied by the supporting and dragging roller 11. Since its weight is applied to the ribbon 2, the tensioning means tends to form a bend in the portion thereof comprised between the web 3 and the supporting and dragging roller 11.
The tension stabilising device 30 comprises a tensioning roller 33, placed on the upper face 2a of the ribbon 2 and parallel with respect to the dragging roller
11. The tensioning roller 33 is coupled at its ends to respective ends 35a, 35b of a pair of swinging arms
34a, 34b. These are placed sideways and above the web 3, and they are hinged at their opposite ends 36a, 36b, which lay on the same vertical plane of the feeding roller 10.
Arms 34a, 34b cooperate to keep the tensioning roller 33 parallel to the supporting and dragging roller 11, and to allow the tensioning roller 33 to move along an arc of the circle L whose radius is equal to the length of arms
34a,34b.
The tensioning roller 33 is preferably fixed to the arms 34a, 34b, but it can be advantageously made free to rotate about its axis, in order to help sliding the ribbon 2.
When the vertical plotter is not operated, the ribbon 2 is stationary, and the tensioning roller 33 leans on the web 3, since this is its equilibrium position.
Operating the support and dragging roller 11 causes a force to be exerted on the ribbon 2, which tends to reduce the size of the bend 7. Said trend is opposed by the weight of tensioning roller 33, since this latter is pulled upwards, away from its equilibrium position. In this way the force exerted on the ribbon 2 by the tensioning roller 33 is substantially constant, since it is equal to the weight cf roller 33, and it is directed downwards, thus keeping the roller 2 tension at a constant value .
The advantages of the present invention mainly consist of stabilising the ribbon 2 tension by means of a simple device, made with a single tensioning roller 33, and thus being extremely reliable and cheap.
A further advantage is to obtain, together with a easy operating device, a great simplification in the plotter maintenance and in the web changing operations.
Obviously, the present invention has been disclosed, with reference to the accompanying drawings, for exemplifying and thus not limiting purposes, and it is clear that all changes can be made in that, according to its practical ways of carrying out and use, which are comprised in the field defined by the following Claims.

Claims

1. A device for stabilising the tension of a drawing support medium in an ink-jet, vertical plotter for tracing shapes for cloths, said plotter being provided with a paper dragging system (1) comprising: at least a feeding roller (10) , free to rotate about it axis, supporting a feeding web (3) of said medium, provided in the form of a continuous ribbon (2) ; at least a supporting and dragging roller (11) , placed downstream of said feeding roller (10) , supporting said ribbon (2) near a print head (4) and to drag said ribbon (2) , according to a feed direction (W) , in a phase relationship with the operation of said head (4) and together with a cooperating counter-rotating roller (12) ; at least a rewind roller (13) , placed downstream of said supporting and dragging roller (11) and fit to receive said ribbon (2) ; said device being characterised in that it consists of oscillating tensioning means (30) , interposed between said web (3) and supporting and dragging roller (11) , supported by the upper face (2a) of said ribbon (2) and fit to exert on this latter a substantially constant force, against the dragging force exerted by said support and dragging roller (11) .
2. A stabilising device according to Claim 1, characterised in that said tensioning means (30) consists of at least a tensioning roller (33) , supported by said ribbon (2) , parallel with said supporting and dragging roller (11) , and coupled at its ends to respective ends (35a, 35b) of a pair of swinging arms (34a, 34b), fit to keep said tensioning roller (33) parallel to said supporting and dragging roller (11) and to allow the same tensioning roller (33) to move along an arc of a circle (L) having its radius equal to the length of said arms (34a, 34b) .
3. A stabilising device according to Claim 2, characterised in that said swinging arms (34a, 34b) are arranged sideways of and above said web (3) , and that they are hinged at their opposite ends (36a, 36b).
4. A stabilising device according to Claim 2, characterised in that said tensioning roller (33) is fixed to said arms (34a, 34b).
5. A stabilising device according to Claim 2, characterised in that said tensioning roller (33) is free to rotate about its axis .
EP97943088A 1996-10-15 1997-10-14 Device for stabilising the tension of the paper ribbon in an ink-jet vertical plotter for tracing shapes for cloths Expired - Lifetime EP0944478B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT96BO000514A IT1286730B1 (en) 1996-10-15 1996-10-15 DEVICE FOR STABILIZING THE TENSION OF PAPER TAPE IN VERTICAL INKJET PLOTTERS FOR SHAPE TRACKING
ITBO960514 1996-10-15
PCT/IB1997/001278 WO1998016394A1 (en) 1996-10-15 1997-10-14 Device for stabilising the tension of the paper ribbon in an ink-jet vertical plotter for tracing shapes for cloths

Publications (2)

Publication Number Publication Date
EP0944478A1 true EP0944478A1 (en) 1999-09-29
EP0944478B1 EP0944478B1 (en) 2002-02-27

Family

ID=11341647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97943088A Expired - Lifetime EP0944478B1 (en) 1996-10-15 1997-10-14 Device for stabilising the tension of the paper ribbon in an ink-jet vertical plotter for tracing shapes for cloths

Country Status (6)

Country Link
EP (1) EP0944478B1 (en)
AT (1) ATE213698T1 (en)
AU (1) AU4469597A (en)
DE (1) DE69710770T2 (en)
IT (1) IT1286730B1 (en)
WO (1) WO1998016394A1 (en)

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
US6261012B1 (en) 1999-05-10 2001-07-17 Fargo Electronics, Inc. Printer having an intermediate transfer film
ES2195688A1 (en) * 2000-07-19 2003-12-01 Investronica Sist S S A Drawing device in form of raster-plotters
US8956490B1 (en) 2007-06-25 2015-02-17 Assa Abloy Ab Identification card substrate surface protection using a laminated coating
CN102649349B (en) * 2011-02-28 2014-07-23 深圳市润天智数字设备股份有限公司 Wide-breadth inkjet printer
CN107379785B (en) * 2017-08-14 2019-02-19 上海东北亚新纺织科技有限公司 A kind of ink-jet textile printing equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5179390A (en) 1989-07-10 1993-01-12 Canon Kabushiki Kaisha Thermal transfer recording apparatus that securely transports the ink containing member
US5201595A (en) 1991-03-25 1993-04-13 Mutoh Industries Ltd. Rolled sheet feeding mechanism of paper-drive type automatic drafting machine
EP0754641A1 (en) 1995-07-21 1997-01-22 Gerber Garment Technology, Inc. Segmented dancer bar and sheet material feed mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1233497B (en) * 1989-07-10 1992-04-02 Algotex Srl Device for centring printing ribbon, particularly in plotters for templates used for cutting fabrics for the creation of items of clothing of various shapes and sizes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5179390A (en) 1989-07-10 1993-01-12 Canon Kabushiki Kaisha Thermal transfer recording apparatus that securely transports the ink containing member
US5201595A (en) 1991-03-25 1993-04-13 Mutoh Industries Ltd. Rolled sheet feeding mechanism of paper-drive type automatic drafting machine
EP0754641A1 (en) 1995-07-21 1997-01-22 Gerber Garment Technology, Inc. Segmented dancer bar and sheet material feed mechanism

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BARNA T.B.: "Tape Tracking Guide", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 11, no. 6, November 1968 (1968-11-01), pages 649, XP002051832
DE BOO J.L. AND JUNG W.: "Paper Straightener and Guide", TECHNICAL DIGEST, no. 47, July 1977 (1977-07-01), pages 5, XP002051830

Also Published As

Publication number Publication date
ITBO960514A0 (en) 1996-10-15
AU4469597A (en) 1998-05-11
EP0944478B1 (en) 2002-02-27
DE69710770T2 (en) 2002-07-18
WO1998016394A1 (en) 1998-04-23
IT1286730B1 (en) 1998-07-17
DE69710770D1 (en) 2002-04-04
ATE213698T1 (en) 2002-03-15
ITBO960514A1 (en) 1998-04-15

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