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
  • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
  • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
  • B41J2/325—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet
• • 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
  • B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
  • B41J17/02—Feeding mechanisms
  • B41J17/12—Special adaptations for ensuring maximum life
• • 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
  • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer 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
  • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
  • B41J33/14—Ribbon-feed devices or mechanisms
• • 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
  • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms

Definitions

• the present invention is concerned with the area of printing devices equipped with various print heads, especially those for printing continuously on a web.
• the object of the invention refers to a process for printing on an inked printing ribbon which transfers the ink to a web or substrate.
• the invention consists of obtaining an optimised sequence of movements for advancing the ribbon in co-ordination with the print heads of the printing device in order to achieve greater speed in printing using the ribbon, reducing dead time.
• the substrate or web to be printed is supplied from a reel operated by a step motor and with a head which prints, with the aid of an inked printing ribbon, a figure or legend for example, on the web each time the latter stops.
• the printing ribbon is the object on which the print head initially prints to transfer the ink to the web, which moves crosswise.
• the printing ribbon normally advances the length needed to print on the next free section to prevent overprinting on two successive sectors.
• heads are used which are arranged uniformly and equidistantly above the place in which the ribbon advances, where all the heads work at the same time, printing in different sectors of the ribbon.
• the heads print on the ribbon in a downward and translational movement, retracting afterwards to allow the ribbon to advance.
• the marks obtained at the initial printing are also spaced apart, so that the ribbon must be displaced in order that the next printing takes place on the intermediate unprinted sectors between these marks.
• One of the most common printing sequences used in printing devices with several heads consists of moving the ribbon step-by-step for a length that, at each step, is the same as the length of the printing sector.
• the ribbon is printed until all its intermediate sectors between the marks already printed have been covered and the ribbon is then moved by a length that equals the addition of the distances between heads plus of one printing in order to print again on a virgin length of ribbon following the sequence described above.
• This method of printing can be optimised since the time taken for this last movement of the ribbon is especially long and delays the continuous printing process.
• the printing process proposed in the present invention allows printing of S sectors by means of n print heads on an inked printing ribbon from which the ink is transferred from the web which is to be printed so that a optimal use is made of the total surface of the ribbon, reducing operating times and thus giving a greater performance from the printing process.
• the printing process applies to a printing device with n print heads whose centres are equidistant from distance d, which descend and move at each printing stroke over the ribbon, defining a printing length a that is less than or equal to the length I of the sectors S in which the printing ribbon is divided.
• the printing process involves the following steps described below:
• Figure 1. Shows a diagram of successive printings on the printing ribbon for different advances of the inked ribbon according to the printing process described for a printing device with three heads.
• Figure 2. Shows the diagram of Figure 1 for a printing device with five heads.
• a printing process is described for application to a printing device equipped with more than two print heads (A, B, C, D, etc) which prints on the inked printing ribbon X below the print heads, and which moves in a longitudinal direction when the print heads (A, B, C, D, etc) are stopped and which stops when the print heads (A, B, C, D, etc) print on the same, transferring the ink to a web or substrate that moves in a crosswise direction.
• Figure 1 shows a printing device with three print heads (A, B, C) in which it can be seen that the distance between their centres is defined by d.
• the printing ribbon X is divided into S sectors of a I length on which the marks are printed by the heads (A, B, C) with a printing length a less than or equal to the I lenght of S sectors.
• the formula [*] verifies that n ⁇ d/l + 1 being d >2I.
• Figure 1 shows that at moment ti the heads (A, B, C) descend and move over the ribbon, printing the marks (Ai), (Bi), (Ci), each one of which with a length a, the print heads (A, B, C) then lift, allowing the subsequent movement of the ribbon, which advances a distance d+l until it stops at a later time t 2 in which the heads (A, B, C) print the marks (A 2 ), (B 2 ), (C 2 ) again on the printing ribbon X.
• Figure 1 shows that at moment ti the heads (A, B, C) descend and move over the ribbon, printing the marks (Ai), (Bi), (Ci), each one of which with a length a, the print heads (A, B, C) then lift, allowing the subsequent movement of the ribbon, which advances a distance d+l until it stops at a later time t 2 in which the heads (A, B, C) print the marks (A 2 ), (B 2 ), (C 2 )
• the length of each printing a will be less than or equal to the length I of each S sector of the ribbon X.

Landscapes

• Impression-Transfer Materials And Handling Thereof (AREA)
• Electronic Switches (AREA)
• Printers Characterized By Their Purpose (AREA)
• Character Spaces And Line Spaces In Printers (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37983458

Family Applications (1)

Country Status (7)

Citations (4)

Family Cites Families (2)

• 2005
  • 2005-12-27 ES ES200503209A patent/ES2301324B1/es active Active
• 2006
  • 2006-12-26 EP EP06831802A patent/EP1965983B1/en active Active
  • 2006-12-26 BR BRPI0620792-8A patent/BRPI0620792B1/pt active IP Right Grant
  • 2006-12-26 AT AT06831802T patent/ATE428570T1/de active
  • 2006-12-26 WO PCT/IB2006/003768 patent/WO2007074380A1/en active Application Filing
  • 2006-12-26 CN CN2006800517609A patent/CN101365593B/zh active Active
  • 2006-12-26 ES ES06831802T patent/ES2324496T3/es active Active
  • 2006-12-26 DE DE602006006348T patent/DE602006006348D1/de active Active

Patent Citations (4)

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