EP0135693A2 - Ribbon meandering preventing device for thermal printers - Google Patents

Ribbon meandering preventing device for thermal printers Download PDF

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Publication number
EP0135693A2
EP0135693A2 EP84108431A EP84108431A EP0135693A2 EP 0135693 A2 EP0135693 A2 EP 0135693A2 EP 84108431 A EP84108431 A EP 84108431A EP 84108431 A EP84108431 A EP 84108431A EP 0135693 A2 EP0135693 A2 EP 0135693A2
Authority
EP
European Patent Office
Prior art keywords
ribbon
carbon
correcting plate
carbon ribbon
run
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
EP84108431A
Other languages
German (de)
French (fr)
Other versions
EP0135693B1 (en
EP0135693A3 (en
Inventor
Tadahisa 19-Chiwari 18-Banchi Oikawa
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.)
Sato Corp
Original Assignee
Sato Corp
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 Sato Corp filed Critical Sato Corp
Publication of EP0135693A2 publication Critical patent/EP0135693A2/en
Publication of EP0135693A3 publication Critical patent/EP0135693A3/en
Application granted granted Critical
Publication of EP0135693B1 publication Critical patent/EP0135693B1/en
Expired 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
    • B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
    • B41J17/30—Constructions of guides for the 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
    • 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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/04—Ink-ribbon guides
    • B41J35/08—Ink-ribbon guides with tensioning arrangements

Definitions

  • the present invention relates to a thermal printer in which a heat-sensitive transfer carbon ribbon is heated by a thermal head to have its carbon transferred to print labels in the form of a paper web.and, more particularly, to a ribbon meandering preventing device for use with a thermal printer, which prevents the carbon ribbon from meandering due to its slackness and/or swinging motion caused by the vibrations of the thermal head during the printing operation so that the carbon ribbon can be fed in a satisfactory state to the printing unit of the thermal printer.
  • Life Styles are diversified in accordance with the development of industry so that labels printed with data such as quality indications or kind controls are applied to all commodities.
  • labels printed with data such as quality indications or kind controls are applied to all commodities.
  • a great number of labels are required to make it urgent to develop a printer which is improved to meet that demand.
  • the label web and a heat-sensitive transfer carbon ribbon for thermal transfer of the labels are fed together to a thermal head.
  • the carbon ribbon is made so soft that it vibrates while it is intermittently being fed by the action of a step motor. If the carbon ribbon vibrates, it swings into the so-called "meandering run”. Then, the abutting state of the carbon ribbon with the thermal head becomes unstable so that it possibly has its portion left unprinted or wrinkled to have a serious defect.
  • the meandering run is also caused as a result of slight change in the adjustment of the printing speed in view of the progress of the printing operation.
  • the thermal printer has to be checked and adjusted so that its printing operations become inefficient.
  • the present invention has been proposed in view of the background thus far described and has an object to provide a ribbon meandering preventing device for a thermal printer, which can ensure clear prints without any defficient portion by preventing a heat-sensitive transfer carbon ribbon from vibrating.
  • a ribbon meandering preventing device for a thermal printer comprising: a ribbon correcting plate for elastically supporting a heat-sensitive transfer carbon ribbon while dragging the same, immediately before said carbon ribbon is guided to run side by side with a paper web of labels for a transfer-printing operation; and cantilever means for cantilevering said ribbon correcting plate such that the remaining free end of said ribbon correcting plate is held to abut against said carbon ribbon for tensing the same to absorb the slackness and/or meandering run, if nay, of said carbon ribbon.
  • a paper web of labels A is let off from a label let-off roll 2 and is guided by a guide roller 3 to run via a label detector 4 to a platen 10 and a thermal head 11.
  • a heat-sensitive transfer carbon ribbon B is let off from a ribbon let-off roll 5 and is guided by a guide roller 8a, a ribbon detector 9 and a guide roller 8b.
  • the two guide rollers 8a and 8b are pivotted on a supporting frame 7.
  • the carbon ribbon B thus guided is pulled out to accompany,i.e., to run side by side with the aforementioned label web A at a ribbon correcting plate 17 of the ribbon meandering preventing device, in other words, immediately upstream of the aforementioned platen 10 and thermal head 11.
  • the united tape of the label web A and the carbon ribbon B is fed to the plate 10 and the thermal head 11 so that carbon may be transferred to print the labels A one by one by the heat of the thermal head 11 in accordance with indicia which are selected and stored in advance.
  • the carbon ribbon B is guided by a guide roller 8c until it is taken up by means of a ribbon take-up roll 6.
  • the label web A printed in the carbon having the aforementioned desired indicia is cut by a rotary cutter 12, which is connected with the label detector 4, into the printed labels A of a predetermined size.
  • These labels A are fed through a chute 13 to a label applicator 14 so that they may be applied to commodities or the like.
  • a prime mover for running the label web A and the carbon ribbon B is a step motor 15 for intermittently revolving the platen 10. The revolutions of the step motor 15 are transmitted, too, to the rotary cutter 12 and the ribbon take-up roll 6 which has a slip structure.
  • reference numeral 16 appearing in Fig. 1 indicates a cooling fan for dissipating the heat during the heat transfer print by the thermal head 11.
  • the ribbon correcting plate 17 of the ribbon meandering preventing device of the present invention is made of a thin plate having an elasticity and is cantilevered at 19, i.e., supported at its base end. More specifically, the ribbon correcting plate 17 has its base end fixed to the thermal printer 1 by fastening means 20 such as bolts or screws and its leading free end. 18 rounded to allow the carbon ribbon B to smoothly run thereon while dragging the same.
  • the carbon ribbor B is guided to come into abutment against the free end edge 18 of the ribbon correcting plate 17 in the vicinity of the feed side of the thermal head 11 so that it is tensed and guided to run side by side with the label web A.
  • the slackness and/or meandering run of the carbon ribbon B which are caused by the vibrations of the platen 10 being intermittently revolved, can be absorbed by that free end edge 18 of the ribbon correcting plate 17, which applies the tension and drag to the carbon ribbon B.
  • the ribbon correcting plate holding the elasticity is cantilevered in the vicinity of the feed side of the thermal head for supporting elastically and dragging the carbon ribbon immediately before the carbon ribbon is guided to run side by side with the label web.
  • the device of the present invention can absorb the slackness and/or meandering run of the carbon ribbon to have an advantage that it can ensure the clear prints without any defficiency.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Electronic Switches (AREA)

Abstract

Herein disclosed is a ribbon meandering preventing device for use with a thermal printer which has a thermal head at the feed side of a heat-sensitive transfer carbon ribbon. A ribbon correcting plate is disposed to have its free end for supporting elastically and dragging the carbon ribbon before the carbon ribbon is guided to run side by side with a paper web of labels so that it may be heated to have its carbon transferred to print the labels one by one. The remaining base end of the ribbon correcting plate is cantilevered to the thermal printer such that the free end of the same is held to abut against the carbon ribbon for tensing the same to absorb the slackness and/or meandering run of the carbon ribbon. The ribbon correcting plate is stepped to ensure the elasticity and has its free end rounded to allow the carbon ribbon to smoothly run thereon while retaining the dragging action.

Description

    BACKGROUND OF THE INVENTION Field of the Invention
  • The present invention relates to a thermal printer in which a heat-sensitive transfer carbon ribbon is heated by a thermal head to have its carbon transferred to print labels in the form of a paper web.and, more particularly, to a ribbon meandering preventing device for use with a thermal printer, which prevents the carbon ribbon from meandering due to its slackness and/or swinging motion caused by the vibrations of the thermal head during the printing operation so that the carbon ribbon can be fed in a satisfactory state to the printing unit of the thermal printer.
    • Description of the Prior Art
  • Life Styles are diversified in accordance with the development of industry so that labels printed with data such as quality indications or kind controls are applied to all commodities. In accordance with the increase of demand, a great number of labels are required to make it urgent to develop a printer which is improved to meet that demand.
  • In the thermal printer of the above-mentioned type according to the prior art, the label web and a heat-sensitive transfer carbon ribbon for thermal transfer of the labels are fed together to a thermal head. As is well known in the art, the carbon ribbon is made so soft that it vibrates while it is intermittently being fed by the action of a step motor. If the carbon ribbon vibrates, it swings into the so-called "meandering run". Then, the abutting state of the carbon ribbon with the thermal head becomes unstable so that it possibly has its portion left unprinted or wrinkled to have a serious defect.
  • The meandering run is also caused as a result of slight change in the adjustment of the printing speed in view of the progress of the printing operation. In each meandering run, the thermal printer has to be checked and adjusted so that its printing operations become inefficient.
    • SUMMARY OF THE INVENTION
  • The present invention has been proposed in view of the background thus far described and has an object to provide a ribbon meandering preventing device for a thermal printer, which can ensure clear prints without any defficient portion by preventing a heat-sensitive transfer carbon ribbon from vibrating.
  • According to a feature of the present invention, there is provided a ribbon meandering preventing device for a thermal printer, comprising: a ribbon correcting plate for elastically supporting a heat-sensitive transfer carbon ribbon while dragging the same, immediately before said carbon ribbon is guided to run side by side with a paper web of labels for a transfer-printing operation; and cantilever means for cantilevering said ribbon correcting plate such that the remaining free end of said ribbon correcting plate is held to abut against said carbon ribbon for tensing the same to absorb the slackness and/or meandering run, if nay, of said carbon ribbon.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Other objects, features and advantages of the present invention will become apparent from the following description taken with reference to the accompanying drawings, in which:
    • Fig. 1 is a sectional side elevation showing the overall construction of a thermal printer which is provided with a ribbon meandering preventing device according to the present invention; and
    • Fig. 2 is a perspective view showing a ribbon correcting plate of the ribbon meandering preventing device of the present invention.
    DESCRIPTION OF THE PREFERRED EMBODIMENT
  • As shown in Fig. 1, a paper web of labels A is let off from a label let-off roll 2 and is guided by a guide roller 3 to run via a label detector 4 to a platen 10 and a thermal head 11.
  • On the other hand, a heat-sensitive transfer carbon ribbon B is let off from a ribbon let-off roll 5 and is guided by a guide roller 8a, a ribbon detector 9 and a guide roller 8b. The two guide rollers 8a and 8b are pivotted on a supporting frame 7. The carbon ribbon B thus guided is pulled out to accompany,i.e., to run side by side with the aforementioned label web A at a ribbon correcting plate 17 of the ribbon meandering preventing device, in other words, immediately upstream of the aforementioned platen 10 and thermal head 11. As a result, the united tape of the label web A and the carbon ribbon B is fed to the plate 10 and the thermal head 11 so that carbon may be transferred to print the labels A one by one by the heat of the thermal head 11 in accordance with indicia which are selected and stored in advance. After this transfer-printing operation, the carbon ribbon B is guided by a guide roller 8c until it is taken up by means of a ribbon take-up roll 6.
  • In this meanwhile, the label web A printed in the carbon having the aforementioned desired indicia is cut by a rotary cutter 12, which is connected with the label detector 4, into the printed labels A of a predetermined size. These labels A are fed through a chute 13 to a label applicator 14 so that they may be applied to commodities or the like.
  • Here, a prime mover for running the label web A and the carbon ribbon B is a step motor 15 for intermittently revolving the platen 10. The revolutions of the step motor 15 are transmitted, too, to the rotary cutter 12 and the ribbon take-up roll 6 which has a slip structure.
  • Incidentally, reference numeral 16 appearing in Fig. 1 indicates a cooling fan for dissipating the heat during the heat transfer print by the thermal head 11.
  • Turning to Fig. 2, the ribbon correcting plate 17 of the ribbon meandering preventing device of the present invention is made of a thin plate having an elasticity and is cantilevered at 19, i.e., supported at its base end. More specifically, the ribbon correcting plate 17 has its base end fixed to the thermal printer 1 by fastening means 20 such as bolts or screws and its leading free end. 18 rounded to allow the carbon ribbon B to smoothly run thereon while dragging the same.
  • Thus, the carbon ribbor B is guided to come into abutment against the free end edge 18 of the ribbon correcting plate 17 in the vicinity of the feed side of the thermal head 11 so that it is tensed and guided to run side by side with the label web A. As a result, the slackness and/or meandering run of the carbon ribbon B, which are caused by the vibrations of the platen 10 being intermittently revolved, can be absorbed by that free end edge 18 of the ribbon correcting plate 17, which applies the tension and drag to the carbon ribbon B.
  • As has been described hereinbefore, according to the present invention, the ribbon correcting plate holding the elasticity is cantilevered in the vicinity of the feed side of the thermal head for supporting elastically and dragging the carbon ribbon immediately before the carbon ribbon is guided to run side by side with the label web. As a result, the device of the present invention can absorb the slackness and/or meandering run of the carbon ribbon to have an advantage that it can ensure the clear prints without any defficiency.

Claims (6)

1. A ribbon meandering preventing device for a thermal printer, comprising: a ribbon correcting plate for.elastically supporting a heat-sensitive transfer carbon ribbon while dragging the same, before said carbon ribbon is guided to run side by side with a paper web of labels for a transfer-printing operation; and cantilever means for cantilevering said ribbon correcting plate such that the remaining free end of said ribbon correcting plate is held to abut against said carbon ribbon for tensing the same to absorb the slackness and/or meandering run, if any, of said carbon ribbon.
2. A ribbon meandering preventing device according to Claim 1, wherein said ribbon correcting plate is stepped to ensure the elasticity and has its free end rounded to allow said carbon ribbon to smoothly run thereon while retaining the dragging action.
3. A ribbon meandering preventing device according to Claim 1, wherein said cantilever means includes a plurality of screws fastening said ribbon correcting plate in position to said thermal printer.
4. A ribbon meandering preventing device for use with a thermal printer having a thermal head at the feed side of a heat-sensitive transfer carbon ribbon, comprising:
a ribbon correcting plate disposed to have its free end positioned in the vicinity of the feed side of said thermal head for supporting elastically and dragging said carbon ribbon before said carbon ribbon is guided to run side by side with a paper web of labels so that it may be heated to have its carbon transferred to print the labels one by one; and
cantilever means for cantilevering the remaining base end of said ribbon correcting plate to said thermal printer such that the free end of said ribbon correcting plate is held to abut against said carbon ribbon for tensing the same to absorb the slackness and/or meandering run, if any, of said carbon ribbon.
5. A ribbon meandering preventing device according to Claim 4, wherein said ribbon correcting plate is stepped to ensure the elasticity and has its free end rounded to allow said carbon ribbon to smoothly run thereon while retaining the dragging action.
6. A ribbon meandering preventing device according to Claim 4, wherein said cantilever means includes a plurality of screws fastening said ribbon correcting plate to the vicinity of said thermal head.
EP19840108431 1983-09-10 1984-07-17 Ribbon meandering preventing device for thermal printers Expired EP0135693B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP139625/83U 1983-09-10
JP13962583U JPS6048458U (en) 1983-09-10 1983-09-10 Ribbon meandering prevention device for thermal printers

Publications (3)

Publication Number Publication Date
EP0135693A2 true EP0135693A2 (en) 1985-04-03
EP0135693A3 EP0135693A3 (en) 1986-03-19
EP0135693B1 EP0135693B1 (en) 1988-06-29

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Application Number Title Priority Date Filing Date
EP19840108431 Expired EP0135693B1 (en) 1983-09-10 1984-07-17 Ribbon meandering preventing device for thermal printers

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EP (1) EP0135693B1 (en)
JP (1) JPS6048458U (en)
DE (2) DE135693T1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232931A (en) * 1986-07-15 1991-01-02 Monarch Marking Systems Inc Tensioning ink-ribbons in thermal printers.
WO2002028657A1 (en) * 2000-10-05 2002-04-11 Sagem Sa Apparatus for making visible recordings on a record carrier with the aid of a thermal transfer foil
EP1557274A3 (en) * 2004-01-26 2007-09-26 Alps Electric Co., Ltd. Heat transfer printer
EP1900537A1 (en) * 2001-05-30 2008-03-19 Wedg Co. Ltd Image recording apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707215A (en) * 1970-07-06 1972-12-26 Honeywell Inc Web tensioner for high speed printer
US4232325A (en) * 1978-11-08 1980-11-04 Leeds And Northrup Ltd. Thermal printing device with spring support tines
GB2102740A (en) * 1981-05-29 1983-02-09 Tokyo Shibaura Electric Co Printing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54133913A (en) * 1978-04-08 1979-10-18 Nippon Telegraph & Telephone Feed mechanism for combineddroll recording paper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707215A (en) * 1970-07-06 1972-12-26 Honeywell Inc Web tensioner for high speed printer
US4232325A (en) * 1978-11-08 1980-11-04 Leeds And Northrup Ltd. Thermal printing device with spring support tines
GB2102740A (en) * 1981-05-29 1983-02-09 Tokyo Shibaura Electric Co Printing apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232931A (en) * 1986-07-15 1991-01-02 Monarch Marking Systems Inc Tensioning ink-ribbons in thermal printers.
GB2232931B (en) * 1986-07-15 1991-04-17 Monarch Marking Systems Inc Printer
WO2002028657A1 (en) * 2000-10-05 2002-04-11 Sagem Sa Apparatus for making visible recordings on a record carrier with the aid of a thermal transfer foil
EP1900537A1 (en) * 2001-05-30 2008-03-19 Wedg Co. Ltd Image recording apparatus
EP1557274A3 (en) * 2004-01-26 2007-09-26 Alps Electric Co., Ltd. Heat transfer printer
US7414642B2 (en) 2004-01-26 2008-08-19 Alps Electric Co., Ltd. Heat transfer printer

Also Published As

Publication number Publication date
EP0135693B1 (en) 1988-06-29
EP0135693A3 (en) 1986-03-19
JPS6048458U (en) 1985-04-05
DE3472380D1 (en) 1988-08-04
DE135693T1 (en) 1985-08-14

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