WO2020049479A1 - A method for printing generic images on leather sheets - Google Patents

A method for printing generic images on leather sheets Download PDF

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Publication number
WO2020049479A1
WO2020049479A1 PCT/IB2019/057448 IB2019057448W WO2020049479A1 WO 2020049479 A1 WO2020049479 A1 WO 2020049479A1 IB 2019057448 W IB2019057448 W IB 2019057448W WO 2020049479 A1 WO2020049479 A1 WO 2020049479A1
Authority
WO
WIPO (PCT)
Prior art keywords
file
leather
border
work plane
leather article
Prior art date
Application number
PCT/IB2019/057448
Other languages
French (fr)
Inventor
Giuseppe Gallucci
Original Assignee
Elitron Ipm S.R.L.
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 Elitron Ipm S.R.L. filed Critical Elitron Ipm S.R.L.
Priority to EP19780018.8A priority Critical patent/EP3847030B1/en
Publication of WO2020049479A1 publication Critical patent/WO2020049479A1/en

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
    • 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
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/008—Controlling printhead for accurately positioning print image on printing material, e.g. with the intention to control the width of margins
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0095—Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end
    • 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
    • B41J3/28—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0085—Using suction for maintaining printing material flat
    • 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
    • B41J2203/00—Embodiments of or processes related to the control of the printing process
    • B41J2203/01—Inspecting a printed medium or a medium to be printed using a sensing device
    • B41J2203/011—Inspecting the shape or condition, e.g. wrinkled or warped, of a medium to be printed before printing on it

Definitions

  • the present invention relates to the technical sector concerning methods for printing generic images on leather sheets.
  • the term“generic images” is taken to mean, for example, a generic writing which is repeated, or the text of a letter as illustrated in figure 1 , or the printing of a newspaper, or a series of identical images, such as, for example, logos, geometric or floral figures or the like, or combinations thereof which are repeated in order to be equidistant and aligned according to a transversal axis and a longitudinal axis.
  • printing on leather sheets of generic images for example “designs”, which are continuously repeated or which are repeated in a defined order, is carried out by positioning the leather sheet, on a work plane of a printing machine.
  • the printing head of the above-described machine appropriately controlled by a control system, begins printing, starting from a side of the work plane then to proceed over the whole surface thereof and printing both on the external surface of the leather sheet and on the surface of the plane that is not occupied by the leather sheet, as schematically illustrated in figure 1.
  • This method leads to a waste of colorant substances used to print on the leather sheet, as the printing head prints indistinctly on both the work plane and the surface of the leather sheet.
  • the cleaning operation of the plane has a negative effect on the work cycle for the printing of a plurality of leather sheets, as the printing machine will be inoperative for the whole time that the operator is cleaning the plane.
  • the invention has the aim of providing a method for printing generic images on leather sheets which obviates the drawbacks mentioned in the foregoing and in particular a method enabling printing generic images on only the surface of the leather sheet.
  • Another aim of the invention consists in providing a method distinguished by operating steps that are particularly simple and rapid, which further enables obtaining a finished product of proven quality.
  • a further aim of the invention is to provide a method which enables minimising the time required for printing only the surface of a series of leather sheets.
  • FIG. 1 schematically illustrates a view from above of the printing of generic images on leather sheets as in the state of the art
  • FIG. 2 schematically illustrates a view from above of a printing machine on which a leather article to be printed has been position according to a method for printing generic images of the present invention
  • FIG. 3 is a schematic illustration of a block diagram of some significant steps of the described method
  • FIG. 5 schematically illustrates the above-described printing machine as well as the leather article on which generic images have been printed.
  • reference number 1 denotes a printing machine of known type having a work plane (10) and a printing head (11), and 2 denotes a leather article on which generic images, memorised in a processor (E) (figure 3) are to be printed.
  • a work file (F L ) comprising at least an image (I) defined by a series of components, being, by way of example, texts in written and/or printed form, and/or logos, and/or photographs, and/or drawings of various type, and/or geometric and/or floral figures, the components following one another in a continuous or discontinuous way (figure 4A).
  • Reference numeral 3 denotes an optical reader, positioned above the work plane (10) of the printing machine (1) and connected to the processor (E).
  • the method of the invention includes random positioning of a leather article (2) to be printed, having a profile and size and spread on the printing plane (10) of the printing machine (1).
  • the optical reader (3) detects the dimension and border (C) of the leather sheet resting on the work plane (10), and the positioning and orientation thereof with respect thereto: this representation is transmitted to the processor, which by means of known systems transforms the corresponding information into a leather article file (F*) wherein the positioning and the orientation of the leather sheet is identified with respect to the work plane and the border (C), which delimits the surface and the shape of the leather sheet, internally of which the memorised generic image is to be printed.
  • F* leather article file
  • the method of the invention further includes: creating a service file (F s ) comprising a portion (P) of the generic image (I) of an extension such as to contain the area of the leather article (2) delimited by the border (C), the border (C) being indicated with a broken line (figure 4B); creating an operating file (F 0 ), memorised in the processor (E), obtained from the service file by eliminating the fraction of the portion of generic image at least external of the border (C) of the leather article (see figure 4C).
  • a service file comprising a portion (P) of the generic image (I) of an extension such as to contain the area of the leather article (2) delimited by the border (C), the border (C) being indicated with a broken line (figure 4B)
  • creating an operating file (F 0 ) memorised in the processor (E), obtained from the service file by eliminating the fraction of the portion of generic image at least external of the border (C) of the leather article (see figure 4C).
  • the information originating from the operating file (F 0 ) and the leather article file (F*) are loaded, via an RIP (Raster Image Processor) program of known type, in a print layout (F) (or file).
  • the printing head (11) (figure 2) of the printing machine (1), managed by the RIP, is activated and is then controlled, for example by means of a Cartesian reference system with an origin coinciding with the origin of the work plane (10) on which the leather article is stretched in order for the contents of the operating file (F 0 ) (see figure 5) to be printed thereon.
  • the proposed method is particularly advantageous, as it enables printing generic images exclusively on the surface of leather articles positioned on the work plane (10) of a printing machine (1).
  • the method enables detecting the size, the orientation, the border of the leather sheet and, with a processing of the information, combined with the information in the operating file (F 0 ), controlling the printing head (11) to carry out the printing of generic images on the whole surface of the leather article within the border (C) detected by the optical reader (3) (figure 3).
  • This method further makes the printing machine very versatile, since as well as printing exclusively on the surface of a leather article it enables printing on a plurality of leather articles of different formats having regular or irregular borders.
  • the work plane (10) of the printing machine can include a series of holes connected to an aspiration source utilisable in a case in which there is a need to print on a leather article with a thickness of a few millimetres, for example leather.
  • the leather article includes curvatures deriving from the rigidity of the material, so following positioning thereof on the work plane (10) it is possible to activate the aspiration source in such a way that the leather article is brought, in all its parts, perfectly into adherence to the work plane and, consequently, the printing head, following the detecting of the position, orientation and border of the leather article, can print perfectly on the whole surface thereof.
  • a generic image (I) (figure 4A) is used, from which a portion (P) is “trimmed away” (figure 4B); an external fraction is cut from the portion (P), external of the border (C) (figure 4C) that is printed on the leather article (2) (figure 5).
  • the generic image (I) can be used to print a series of leather articles.
  • the operating file (F 0 ) can be defined by narrowing the portion (P) of generic image (I) so that the border (C) of the leather article (2) circumscribes the portion; this can be obtained in a known way, for example by reducing either the dimensions of the component of the generic image and/or the mutual distance between the components themselves.

Abstract

A method for printing generic images on leather articles comprising steps of: having available at least an electronic processor; having available a printing machine (1) activatable by means of the processor; having available at least an optical reader (3) above the work plane of the printing machine and connected to the processor; positioning, on the work plane (10) of the printing machine, a leather article to be printed; having available and memorising, in the processor, a work file (FL) comprising at least a generic image (I); detecting, by means of the optical reader (3), the border (C), the positioning and the orientation of the leather sheet to be printed positioned, in a random fashion, on the work plane (10); creating an article file (F*) in which the positioning, orientation, format and border (C) of the leather sheet positioned on the work plane (10) are memorised; creating a service file (Fs) comprising a portion (P) of the generic image (I) of an extension such as to contain the border of the leather article; creating an operating file (Fo), obtained by eliminating the fraction of portion of leather sheet of the service file external of the border; creating, from the operating file (Fo) and leather article (F*), a print file (F); memorising the print file (F) legible by the printing machine (1); activating the printing machine (1), piloted by the print file of the preceding step, in order to print the image internally of the border (C) of the leather article (2) positioned on the work plane (10).

Description

A METHOD FOR PRINTING GENERIC IMAGES ON LEATHER SHEETS
FIELD OF THE INVENTION
The present invention relates to the technical sector concerning methods for printing generic images on leather sheets.
DESCRIPTION OF THE PRIOR ART
In the following the term“generic images” is taken to mean, for example, a generic writing which is repeated, or the text of a letter as illustrated in figure 1 , or the printing of a newspaper, or a series of identical images, such as, for example, logos, geometric or floral figures or the like, or combinations thereof which are repeated in order to be equidistant and aligned according to a transversal axis and a longitudinal axis.
At present, printing on leather sheets of generic images, for example “designs”, which are continuously repeated or which are repeated in a defined order, is carried out by positioning the leather sheet, on a work plane of a printing machine.
The printing head of the above-described machine, appropriately controlled by a control system, begins printing, starting from a side of the work plane then to proceed over the whole surface thereof and printing both on the external surface of the leather sheet and on the surface of the plane that is not occupied by the leather sheet, as schematically illustrated in figure 1.
This method leads to a waste of colorant substances used to print on the leather sheet, as the printing head prints indistinctly on both the work plane and the surface of the leather sheet.
Following the removal of the printed leather sheet from the work plane, an operator will clean the plane of the colorant substance and prevent a subsequent leather sheet to be printed from being fouled by the colorant substance present on the plane, which will make it partly unusable for realising articles.
The cleaning operation of the plane has a negative effect on the work cycle for the printing of a plurality of leather sheets, as the printing machine will be inoperative for the whole time that the operator is cleaning the plane.
SUMMARY OF THE INVENTION
The invention has the aim of providing a method for printing generic images on leather sheets which obviates the drawbacks mentioned in the foregoing and in particular a method enabling printing generic images on only the surface of the leather sheet.
Another aim of the invention consists in providing a method distinguished by operating steps that are particularly simple and rapid, which further enables obtaining a finished product of proven quality.
A further aim of the invention is to provide a method which enables minimising the time required for printing only the surface of a series of leather sheets.
The above-mentioned advantages of the invention are obtained according to the contents of the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The characteristics of the invention are specified in the following with particular reference to a preferred, but not exclusive, embodiment, with reference to the accompanying tables of drawings, in which:
- figure 1 schematically illustrates a view from above of the printing of generic images on leather sheets as in the state of the art;
- figure 2 schematically illustrates a view from above of a printing machine on which a leather article to be printed has been position according to a method for printing generic images of the present invention;
- - figure 3 is a schematic illustration of a block diagram of some significant steps of the described method;
- figures 4A, 4B, 4C schematically illustrate some of the steps;
- figure 5 schematically illustrates the above-described printing machine as well as the leather article on which generic images have been printed.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference to the accompanying tables of drawings, reference number 1 denotes a printing machine of known type having a work plane (10) and a printing head (11), and 2 denotes a leather article on which generic images, memorised in a processor (E) (figure 3) are to be printed.
Stored in the processor (E) is a work file (FL) comprising at least an image (I) defined by a series of components, being, by way of example, texts in written and/or printed form, and/or logos, and/or photographs, and/or drawings of various type, and/or geometric and/or floral figures, the components following one another in a continuous or discontinuous way (figure 4A).
Reference numeral 3 denotes an optical reader, positioned above the work plane (10) of the printing machine (1) and connected to the processor (E).
The method of the invention includes random positioning of a leather article (2) to be printed, having a profile and size and spread on the printing plane (10) of the printing machine (1).
The optical reader (3) detects the dimension and border (C) of the leather sheet resting on the work plane (10), and the positioning and orientation thereof with respect thereto: this representation is transmitted to the processor, which by means of known systems transforms the corresponding information into a leather article file (F*) wherein the positioning and the orientation of the leather sheet is identified with respect to the work plane and the border (C), which delimits the surface and the shape of the leather sheet, internally of which the memorised generic image is to be printed.
The method of the invention further includes: creating a service file (Fs) comprising a portion (P) of the generic image (I) of an extension such as to contain the area of the leather article (2) delimited by the border (C), the border (C) being indicated with a broken line (figure 4B); creating an operating file (F0), memorised in the processor (E), obtained from the service file by eliminating the fraction of the portion of generic image at least external of the border (C) of the leather article (see figure 4C).
The information originating from the operating file (F0) and the leather article file (F*) are loaded, via an RIP (Raster Image Processor) program of known type, in a print layout (F) (or file). Following the creation of this file, the printing head (11) (figure 2) of the printing machine (1), managed by the RIP, is activated and is then controlled, for example by means of a Cartesian reference system with an origin coinciding with the origin of the work plane (10) on which the leather article is stretched in order for the contents of the operating file (F0) (see figure 5) to be printed thereon.
The proposed method is particularly advantageous, as it enables printing generic images exclusively on the surface of leather articles positioned on the work plane (10) of a printing machine (1).
Following the positioning of the leather article on the work plane (10), the method enables detecting the size, the orientation, the border of the leather sheet and, with a processing of the information, combined with the information in the operating file (F0), controlling the printing head (11) to carry out the printing of generic images on the whole surface of the leather article within the border (C) detected by the optical reader (3) (figure 3).
With this method, therefore, only the necessary quantity of ink necessary for printing on the surface of the leather article will be used, thus avoiding the useless and expensive spending of colorant substances necessary today in printing on leather articles.
Further, the fouling of the work plane with the colorant substances is avoided, thus optimising the times required for the consecutive printing of a plurality of leather articles.
This method further makes the printing machine very versatile, since as well as printing exclusively on the surface of a leather article it enables printing on a plurality of leather articles of different formats having regular or irregular borders.
It is specified that the work plane (10) of the printing machine can include a series of holes connected to an aspiration source utilisable in a case in which there is a need to print on a leather article with a thickness of a few millimetres, for example leather. The leather article includes curvatures deriving from the rigidity of the material, so following positioning thereof on the work plane (10) it is possible to activate the aspiration source in such a way that the leather article is brought, in all its parts, perfectly into adherence to the work plane and, consequently, the printing head, following the detecting of the position, orientation and border of the leather article, can print perfectly on the whole surface thereof.
In definition, a generic image (I) (figure 4A) is used, from which a portion (P) is “trimmed away” (figure 4B); an external fraction is cut from the portion (P), external of the border (C) (figure 4C) that is printed on the leather article (2) (figure 5).
In accordance with these steps, the generic image (I) can be used to print a series of leather articles.
In other terms, one image is not used for each leather sheet to be printed, but the same image on which the operation as described in the foregoing is used. In a variant of the method, the operating file (F0) can be defined by narrowing the portion (P) of generic image (I) so that the border (C) of the leather article (2) circumscribes the portion; this can be obtained in a known way, for example by reducing either the dimensions of the component of the generic image and/or the mutual distance between the components themselves.
It is understood that the above has been described by way of non-limiting example and that any modifications of detail, and variants of form and dimensions of the described elements, and any technical-functional variants of the steps of the method are understood to fall within the same protective scope, as claimed in the following.

Claims

1. A method for printing generic images on leather articles comprising steps of:
- having available at least an electronic processor;
- having available a printing machine (1) activatable by means of the processor;
- having available at least an optical reader (3) above the work plane of the printing machine and connected to the processor;
- positioning, on the work plane (10) of the printing machine, a leather article to be printed;
and characterised in that it comprises steps of:
- having available, in a work file (FL) memorised in the processor (E), at least a generic image (I) defined by a series of components, being texts in written and/or printed form, and/or logos, and/or photographs, and/or drawings, and/or geometric and/or floral figures, the components following one another in a continuous or discontinuous way;
- detecting, by means of the optical reader (3), the border (C), the positioning and the orientation of the leather article to be printed positioned, in a random fashion, on the work plane (10);
- creating a leather article file (F*) in which are memorised the positioning, the orientation, the format and the border (C) of the leather article positioned on the work plane (10);
- creating a service file (Fs) memorised in the processor, comprising a portion (P) of the generic image (I) of an extension such as to contain the area delimited by the border (C) of the leather article (2);
- creating an operating file (F0), memorised in the processor, obtained from the service file by eliminating the fraction of the portion of generic image at least external of the border (C) of the leather article;
- creating a print file (F) legible by the printing machine (1), containing the information of the leather article file (F*) and operating file (F0); - activating the printing machine (1), piloted by print file of the preceding step, in order to print the image within the border (C) of the leather article (2) positioned on the work plane (10).
2. The method of the preceding claim, characterised in that the operating file (F0) is defined by narrowing the portion (P) of generic image (I) so that the border (C) of the leather article (2) circumscribes the portion.
3. The method of claim 1 or 2, characterised in that during the step of activating the printing machine (1) the printing head (11) is activated then to be controlled, according to the coordinates referring to a Cartesian reference system with an origin coinciding with the origin of the work plane (10) on which the leather article is laid out, in order to print the generic image concerned within the border (C) thereof.
4. The method of any one of the preceding claims, characterised in that it retains, by means of activation of an aspiration source connected to a series of holes afforded on the work plane (10), said leather article (2) perfectly laid out on the work plane (10) and enables the printing head (11) to perfectly print on the entirety of the surface of the leather article (2).
5. The method of any one of the preceding claims, characterised in that the series of the components defining the generic image are repeated in order to be equidistant and aligned according to a transversal axis and a longitudinal axis.
PCT/IB2019/057448 2018-09-05 2019-09-04 A method for printing generic images on leather sheets WO2020049479A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19780018.8A EP3847030B1 (en) 2018-09-05 2019-09-04 A method for printing generic images on leather sheets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800008365 2018-09-05
IT102018000008365 2018-09-05

Publications (1)

Publication Number Publication Date
WO2020049479A1 true WO2020049479A1 (en) 2020-03-12

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Application Number Title Priority Date Filing Date
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EP (1) EP3847030B1 (en)
WO (1) WO2020049479A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160107468A1 (en) * 2013-06-26 2016-04-21 Oce-Technologies B.V. Method for generating prints on a flatbed printer, apparatus therefor and a computer program therefor
US20170183812A1 (en) * 2014-04-04 2017-06-29 Luigino Criante Method for marking references on a flat article and related system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160107468A1 (en) * 2013-06-26 2016-04-21 Oce-Technologies B.V. Method for generating prints on a flatbed printer, apparatus therefor and a computer program therefor
US20170183812A1 (en) * 2014-04-04 2017-06-29 Luigino Criante Method for marking references on a flat article and related system

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Publication number Publication date
EP3847030B1 (en) 2023-11-08
EP3847030C0 (en) 2023-11-08
EP3847030A1 (en) 2021-07-14

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