EP1574348B1 - Spannvorrichtung für Drucker - Google Patents

Spannvorrichtung für Drucker Download PDF

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Publication number
EP1574348B1
EP1574348B1 EP05447053A EP05447053A EP1574348B1 EP 1574348 B1 EP1574348 B1 EP 1574348B1 EP 05447053 A EP05447053 A EP 05447053A EP 05447053 A EP05447053 A EP 05447053A EP 1574348 B1 EP1574348 B1 EP 1574348B1
Authority
EP
European Patent Office
Prior art keywords
media
rolls
tensioning system
tension
roll
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.)
Expired - Lifetime
Application number
EP05447053A
Other languages
English (en)
French (fr)
Other versions
EP1574348A1 (de
Inventor
Rik Fonteyne
Nele Dely
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.)
Mutoh Europe NV
Original Assignee
Mutoh Europe NV
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
Priority claimed from EP04447223A external-priority patent/EP1645427A1/de
Application filed by Mutoh Europe NV filed Critical Mutoh Europe NV
Priority to EP05447053A priority Critical patent/EP1574348B1/de
Publication of EP1574348A1 publication Critical patent/EP1574348A1/de
Application granted granted Critical
Publication of EP1574348B1 publication Critical patent/EP1574348B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/16—Registering, tensioning, smoothing or guiding webs longitudinally by weighted or spring-pressed movable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/12—Single-function printing machines, typically table-top machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/36—Plotting

Definitions

  • the invention is related to a system for tensioning printing media (paper, textile,%) on a printer, in particular on a large inkjet printer.
  • Irregular expansion of the media may occur due to:
  • the media loop between the printer and the media collecting system is put under a certain tension, caused by the pulling force of the media collecting system (take-up system).
  • the loop length is the length of the media between the printing position and the media collecting system, measured in the moving direction of the media.
  • Such a loop length difference causes the tension force applied by the media collecting system to be concentrated in the place of the media where the loop length is shorter. This creates tension loss in the areas of the media where the loop length is longer.
  • the loop length difference may further cause bubbles in the media at the printing area, resulting in:
  • the present invention aims to provide a tensioning system able to compensate irregular expansion or tension of media such that the media is kept flat at the printing position.
  • the tensioning system according to the invention is particularly suitable for printing on extremely thin media, such as are presently used for example in the Digital Transfer Printing technique.
  • Fig. 1 represents two views of a printing device comprising a tensioning system according to the present invention.
  • Fig. 2 represents a detailed view of the tensioning system.
  • Fig. 3 represents an embodiment with three rolls.
  • Fig 3a shows three plane views.
  • Fig. 3b shows a 3-D view.
  • Figure 1 shows two views of a printing device comprising a tensioning system 1 according to a first embodiment of the present invention.
  • the tensioning system of the first embodiment comprises a number of tension rolls 5, which are mounted next to each other longitudinally. They are placed in the direction essentially perpendicular to the media travel direction defined by the arrows (fig. 2).
  • Each tension roll is independently spring loaded on both ends. Springs 6 are mounted for this purpose at each end of each tension roll.
  • each tension roll except for the one in the middle, can be adjusted in the left-right direction (see fig. 3b, arrow 10). This adjustment can be used to fit the system to the width of the media used.
  • the system of the invention preferably has at least the outer rolls being movable in longitudinal direction.
  • Both the left and the right outside tension roll may have a higher spring load on the outsides. This is because the effect of irregular media expansion shows up mainly on the outside edges of the media.
  • the total system can be withdrawn backward for media loading. It can be adjusted in the front/rear direction (arrow 11) to adjust the offset spring force on the tension rolls.
  • the tension rolls can be fixed around their length axis, allowing the media to slide over, or they can be mounted on bearings, allowing them to roll with the media movement.
  • the tension rolls of the system of the invention each give additional, independent local tension on the media area covered by the width of the tension roll. This compensates for the differences in the loop length over the width of the media. By doing so, all irregular media expansion is absorbed at the invention system, thereby keeping the media in the print area flat.
  • system of the invention allows to compensate for the bending of the media collecting roll, as described above.
  • the system of the invention is especially advantageous for printers used to print on extremely thin media, such as printers used for Digital Transfer Printing.

Landscapes

  • Handling Of Continuous Sheets Of Paper (AREA)

Claims (4)

  1. Spannsystem (1) für Drucker, das ein Mittel zum Anlegen einer Spannkraft an ein Druckmedium entlang einer Kontaktzone umfasst, dadurch gekennzeichnet, dass das Mittel mehrere Spannrollen (5) umfasst, die in Längsrichtung nebeneinander angeordnet sind, wobei jede Rolle unabhängig an jedem Ende federbelastet (6) ist.
  2. Spannsystem nach Anspruch 1, das drei Rollen (5) umfasst, wobei die mittlere Rolle in Längsrichtung befestigt ist und die anderen beiden Rollen in der Längsrichtung verstellt werden können.
  3. Spannsystem nach Anspruch 1, wobei die Rollen (5) um ihre Längsachse herum befestigt sind.
  4. Spannsystem nach Anspruch 1, wobei sich die Rollen (5) um ihre Längsachse herum drehen können.
EP05447053A 2004-03-10 2005-03-10 Spannvorrichtung für Drucker Expired - Lifetime EP1574348B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05447053A EP1574348B1 (de) 2004-03-10 2005-03-10 Spannvorrichtung für Drucker

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US55244104P 2004-03-10 2004-03-10
US552441P 2004-03-10
EP04447223 2004-10-08
EP04447223A EP1645427A1 (de) 2004-10-08 2004-10-08 Spannvorrichtung für Drucker
EP05447053A EP1574348B1 (de) 2004-03-10 2005-03-10 Spannvorrichtung für Drucker

Publications (2)

Publication Number Publication Date
EP1574348A1 EP1574348A1 (de) 2005-09-14
EP1574348B1 true EP1574348B1 (de) 2007-12-26

Family

ID=34830804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05447053A Expired - Lifetime EP1574348B1 (de) 2004-03-10 2005-03-10 Spannvorrichtung für Drucker

Country Status (1)

Country Link
EP (1) EP1574348B1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US674919A (en) * 1901-03-07 1901-05-28 John Parker Jefferis Web slitting and winding apparatus.
GB736674A (en) * 1951-02-05 1955-09-14 John Douglas Robertson Improvements in rolls for transversely stretching or contracting webs
US3266743A (en) * 1963-10-22 1966-08-16 Samuel M Langston Co Bow type web spreading means
FI69440C (fi) * 1983-07-22 1986-02-10 Waertsilae Oy Ab Anordning foer utbredning av bana
CH688893A5 (de) 1994-05-11 1998-05-15 De La Rue Giori Sa Zugwalze zum Transport einer Materialbahn, insbesondere einer Papierbahn in einer Rollendruckmaschine.
TW384327B (en) 1996-08-26 2000-03-11 Nippon Petrochemicals Co Ltd Web expansion apparatus
DE10135124B4 (de) 2001-07-19 2004-03-11 LÜRAFLEX GmbH Gerhard Lückenotto Walze zur Führung von bahnenförmigem Material
US6988797B2 (en) 2003-03-12 2006-01-24 Hewlett-Packard Development Company, L.P. Unbacked fabric transport and condition system

Also Published As

Publication number Publication date
EP1574348A1 (de) 2005-09-14

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