EP0084630A1 - Druckbandkassette - Google Patents

Druckbandkassette Download PDF

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Publication number
EP0084630A1
EP0084630A1 EP19820111120 EP82111120A EP0084630A1 EP 0084630 A1 EP0084630 A1 EP 0084630A1 EP 19820111120 EP19820111120 EP 19820111120 EP 82111120 A EP82111120 A EP 82111120A EP 0084630 A1 EP0084630 A1 EP 0084630A1
Authority
EP
European Patent Office
Prior art keywords
platen
ribbon
media
cassette
cartridge
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
EP19820111120
Other languages
English (en)
French (fr)
Other versions
EP0084630B1 (de
Inventor
Ronald Prestly Mcadams
Charles Martin Mccray
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0084630A1 publication Critical patent/EP0084630A1/de
Application granted granted Critical
Publication of EP0084630B1 publication Critical patent/EP0084630B1/de
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
    • 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
    • B41J11/02—Platens
    • B41J11/08—Bar or like line-size platens
    • 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
    • B41J32/00—Ink-ribbon cartridges
    • B41J32/02—Ink-ribbon cartridges for endless ribbons

Definitions

  • This invention relates to serial or line impact printers and mechanisms in general and specifically to ribbon cartridges and platen elements for use in such machines.
  • ribbon cartridges are known in the art. These generally fall into two categories. In the first category, ribbon is wound from reel to reel within the cartridge by engagement of one of the reels with a power-drive source external to the cartridge. Such ribbons are generally caused to traverse a printing area to supply a fresh inked surface between an impact printer and a markable medium such as a sheet of paper positioned over an appropriate platen which is an integral part of the printing machine.
  • a second category of prior art ribbon cartridges are designed to house a continuous loop of ribbon.
  • the ribbon may or may not have a twist in it to create a MOEBIUS loop and is contained within a cassette body; means are provided either within the cassette or in the printing machine for withdrawing the ribbon from the cassette, feeding it past the printing area between a platen and an impact member and returning it to the cassette via a drive means for stuffing it compactly in a random or serpentine fashion within the body of the cassette.
  • Both of the known prior art ribbon cassette categories contemplate an inked ribbon or web or one which is suitably coated with carbon film or the like. Additionally, both categories utilize platens which are an integral part of the printing machine.
  • the ribbon must be drawn from the cassette and exposed to impact between an impact member and a platen during a portion of its journey external to the body of the cassette.
  • Such ribbons or webs are subject to continuous wear when the printer is in use and are often replaced during the life of a printing machine.
  • a typical ribbon may have a useful life of only two to six million character impacts.
  • the printing machines in which they are employed. typically have a finely finished, costly metal bar or resilient carefully formed roller platen or the like which serves as the impact resisting element in the printer for the life thereof.
  • the platen element is often a metal bar or strip which is carefully machined and must last for the life of the printer. This is a fairly expensive component to manufacture. It also requires that the framework and structure of the printer be very carefully aligned with the impact member or print elements to maintain an even printing character intensity. The expense of this accurate assembly and/or provision for adjustment also adds a considerable portion of cost to the machine.
  • While resilient surfaces may be applied to the metal platen by a coating of elastomeric material or the like to reduce noise, this material is more subject to wear and leads to a more frequent replacement of the expensive platen element.
  • Yet another object of the present invention is to provide an improved ribbon cassette and platen assembly having reduced noise generation characteristics.
  • a ribbon cassette in which the platen member is formed as an integral part thereof.
  • Cassettes are typically made of molded plastic which, according to the durometer of material employed, may be either relatively hard and/or brittle or soft and resilient.
  • Making the cassette of normal injection molded thermoplastic materials is relatively commonplace in the art, but employing such material as a platen integral with the cassette itself represents an improvement. Not only is the high cost of the usual separate platen which is a part of the printing machine eliminated, but the platen need only last as long as the ribbon material instead of for the life of the printing machine. Additionally, since the plastic material is substantially the same resiliency as an elastomeric coated hardened platen, noise reduction is significant.
  • the platen While the platen surfaces may wear out much sooner than a normal platen, it is only required to last for the life of the ribbon and is replaced when the cassette is replaced for the purpose of presenting a fresh ink supply.
  • the platen is thus an integral part and of the same material as the cassette body. Means are provided for guiding the ribbon from an exit point in the cassette body across the surface thereof which is utilized as a platen and back into the cassette in the usual manner.
  • the cassette is modified in design to provide a space between the ribbon and the platen portion of the cassette into which a printing paper may be introduced where front printing is desired.
  • the face of the platen portion may have an integrally molded metal insert which is inserted into the injection mold for the plastic cassette to provide a harder more wear resistant surface to the platen portion of the cassette body.
  • Means for locating the cartridge and platen in accurate registration with the printing element so that the printing line is parallel to the path of the printing element is also provided. Locating holes that cooperate with locating pins fix to the precise location required on the printing machine provide this function.
  • the cassette body 1 is preferably made of injection molded thermoplastic in the conventional manner well known to those of skill in the art.
  • the inked ribbon 2 is illustrated as a continuous or serpentine, randomly stuffed loop which is contained primarily in the body of the cassette 1.
  • Guide arms or fingers 3 extend from the main body portion of the cassette 1 to support the ribbon 2 spaced apart from the platen surface 5 which is a portion of the outer wall of cassette I. This permits paper to be inserted between the ribbon 2 and the platen surface 5 for printing thereon and maintains alignment between the ribbon 2 and surface 5 in both the horizontal and vertical directions.
  • Guide pin locating holes 4 are also illustrated. These holes cooperate with fixed location guide pins rigidly affixed in a printer mechanism (not shown), to accurately position the platen surface 5 and the cassette 1 relative to the intended printing line for accurate registration with an impact printing means (also not shown).
  • An internally contained drive and pressure roller set 6 are shown in_ Figure I and will be understood by those of skill in the art to comprise the usual stuffing rollers for drawing ribbon 2 into the body of cassette 1.
  • the ribbon exits from the cassette 1 through an aperture (not shown) near the other end of the cassette. Details of this are well known tcl those of skill in the art and form no part of the present invention. While the stuffing roller form of cassette embodiment is illustrated, this is not an element of the present invention and it will be understood by those of skill in the art that reel-to-reel cassette ribbons systems may be equally employed. It is the structure of the cassette case and its cooperation with the ribbon and printer with the cassette forming the platen as well that is of importance in this invention.
  • FIG 2 a horizontal cross-section elevation view taken through the structure depicted in Figure 1 is shown.
  • a cassette body 1 has a hollow interior portion 7 for containing reels or a randomly folded or serpentine stuffed ribbon as depicted in Figure 1.
  • Ribbon 2 is supported on the guide arms or fingers 3 at either end of the cassette as shown in Figure 1 and a small gap or space 9, through which the paper center line 8 passes, is shown.
  • the paper which is to be printed upon is passed between the backside of ribbon 2 and the front surface of the platen 5 and can be impacted by an impacting means driving against the opposite face of the printing ribbon.
  • the center line for the locating pin holes 4 is also shown and it will be understood by those of skill in the art that accurate registration between the front surface of the platen 5 and the center lines of the locating holes 4 will cooperate with precisely located pins within the printing machine to accurately place the platen 5 in a position parallel to the printing line and to the printing head (not shown) .
  • the platen surface 5 is a directly exposed portion of the wall of the cassette 1 and is formed of the same material, namely injection molded thermoplastic.
  • a material is more resilient than hardened or machined steel or similar metal platens normally employed and will therefore experience a greater degree of wear.
  • this greater degree of wear"of the platen is unimportant since the platen need only last for the life of the ribbon rather than for the life of the printing machine.
  • the resilience of the platen surface greatly reduces the impact noise of printing which is an additional benefit.
  • plastic cassette surfaces function quite well as platens and are.not subject to exceptional wear prior to the time that the ribbon has expired.
  • the impact and penetration forces may be relatively greater and a hardened surface may be applied to the platen 5. This may also be necessary in the case where multiple copies are desired since generally higher print forces are encountered.
  • the plastic cassette still functions to partially reduce noise by resiliently absorbing forces transmitted from the hardened surface.
  • FIG 3 an enlarged partial view of a modification of the cartridge as depicted in Figure 2 is shown.
  • the printing elemet 10 is schematically shown as impacting hammer or dot matrix element positioned along the printing center line adjacent to the opposite surface of ribbon 2 from which the platen surface 5 is positioned.
  • Platen surface 5 as depicted in Figure 3 is shown to be a metallic insert 11 which is normally put in place within the injection mold when the plastic 1 is injected to form the cassette body.
  • the metal surface 5 enables the higher printing forces to be withstood and adds no significant cost to the overall cassette.
  • a thin piece of cold rolled sheet steel or the like is sufficient to harden the platen surface for these conditions sufficiently to last the life of a ribbon 2.
  • the guide fingers 3 and the aperture 9 through which paper along center line 8 can be inserted are also shown.
  • the locating pin apertures 4 with their center line are also indicated as is the hollow central body cavity 7 for the cassette.
  • the overall action and cooperation of the elements of the present invention may now be clearly understood.
  • the locating holes 4 are accurately and precisely positioned with respect to the platen surface 5 on the surface of the cassette 1 and cooperate with precision locating pins in the printing machine to accurately position the platen surface in registration with the printing line and print elements.
  • the resilient nature of the platen reduces impact printing noise as has been pointed out and, due to its manufacture by injection molding with the cassette, eliminates the cost of an entire separate element in the overall printer structure in the form of a separate platen as is usually employed.
  • the fact that the platen is made of the same thermoplastic material and is formed on a surface of a cassette entails hardly any additional cost whatsoever and is therefore of great benefit in producing an economical and quiet operating printer.
  • cassette surface is not limited to the specific embodiment shown since reel-to-reel type ribbon cassettes may be similarly employed. Also, it is not necessary to insert the paper between the ribbon and the platen surface since back printing can be performed with the paper positioned between the impact element and the front surface of the ribbon 2 if desired. In such an operation, as will be readily understood by those of skill in the art, character inversion may occur and hence, the font of the printing element may similarly have to be inverted. If serial dot matrix printing is employed, electronic character reversals are necessary from time to time as appropriate in this type of printing.
  • the registration or locating means in the form of the locating apertures 4 are positioned in precise relation to the platen surface 5 which is a portion of the surface of the cassette 1. Together they function to create an accurately positioned platen in the printing machine and also serve to accurately position the ribbon with respect to the intended line of printing.
  • the overall integral structure of ribbon, guide fingers, platen and cassette body is a compact, low cost, quiet operating and easily replaced subassembly for use in a variety of impact printers.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Handling Of Sheets (AREA)
EP19820111120 1982-01-27 1982-12-02 Druckbandkassette Expired EP0084630B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34305682A 1982-01-27 1982-01-27
US343056 1982-01-27

Publications (2)

Publication Number Publication Date
EP0084630A1 true EP0084630A1 (de) 1983-08-03
EP0084630B1 EP0084630B1 (de) 1986-07-23

Family

ID=23344494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820111120 Expired EP0084630B1 (de) 1982-01-27 1982-12-02 Druckbandkassette

Country Status (9)

Country Link
EP (1) EP0084630B1 (de)
JP (2) JPS58132582A (de)
AR (1) AR242354A1 (de)
AU (1) AU556346B2 (de)
BR (1) BR8300252A (de)
CA (1) CA1204403A (de)
DE (1) DE3272206D1 (de)
ES (1) ES519221A0 (de)
MX (1) MX158598A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702631A (en) * 1984-11-08 1987-10-27 Kabushiki Kaisha Toshiba Thermal ribbon cassette and housing therefore
GB2192589A (en) * 1986-07-18 1988-01-20 Philip Sherwood Harris Preston Method of multi-colour printing using single impact printer
EP0374366A2 (de) * 1988-12-17 1990-06-27 Ernst Reiner GmbH & Co. KG Vorrichtung zum Zuführen von Belegen in eine Druck- und/oder Lesestation
EP0437036A1 (de) * 1990-01-12 1991-07-17 Smith Corona Corporation Farbbandkassette mit integrierter Papierführung
WO1997006958A1 (en) * 1995-08-18 1997-02-27 Fisher-Price, Inc. Improved printer assembly with easily loaded paper cartridge
EP1093927A1 (de) * 1999-10-18 2001-04-25 COMPUPRINT S.p.A. Ebenes lärmschutzdruckwiderlager für anschlagdrucker

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951610A1 (de) * 1979-12-21 1981-07-02 Olympia Werke Ag, 2940 Wilhelmshaven Farbbandkassette fuer eine schreib- o.ae. bueromaschine
US4311401A (en) * 1979-05-07 1982-01-19 Hitachi Koki Company, Limited Printing apparatus with inked ribbon lift restrainer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4311401A (en) * 1979-05-07 1982-01-19 Hitachi Koki Company, Limited Printing apparatus with inked ribbon lift restrainer
DE2951610A1 (de) * 1979-12-21 1981-07-02 Olympia Werke Ag, 2940 Wilhelmshaven Farbbandkassette fuer eine schreib- o.ae. bueromaschine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702631A (en) * 1984-11-08 1987-10-27 Kabushiki Kaisha Toshiba Thermal ribbon cassette and housing therefore
GB2192589A (en) * 1986-07-18 1988-01-20 Philip Sherwood Harris Preston Method of multi-colour printing using single impact printer
EP0374366A2 (de) * 1988-12-17 1990-06-27 Ernst Reiner GmbH & Co. KG Vorrichtung zum Zuführen von Belegen in eine Druck- und/oder Lesestation
EP0374366A3 (de) * 1988-12-17 1991-01-02 Ernst Reiner GmbH & Co. KG Vorrichtung zum Zuführen von Belegen in eine Druck- und/oder Lesestation
EP0437036A1 (de) * 1990-01-12 1991-07-17 Smith Corona Corporation Farbbandkassette mit integrierter Papierführung
WO1997006958A1 (en) * 1995-08-18 1997-02-27 Fisher-Price, Inc. Improved printer assembly with easily loaded paper cartridge
US5999203A (en) * 1995-08-18 1999-12-07 Ttp Group, Plc Printer assembly with easily loaded paper cartridge
EP1093927A1 (de) * 1999-10-18 2001-04-25 COMPUPRINT S.p.A. Ebenes lärmschutzdruckwiderlager für anschlagdrucker
US6588955B1 (en) 1999-10-18 2003-07-08 Compuprint Spa Anti-noise platen of the flat type for an impact printer

Also Published As

Publication number Publication date
AU556346B2 (en) 1986-10-30
ES8401890A1 (es) 1984-01-01
AR242354A1 (es) 1993-03-31
JPS58132582A (ja) 1983-08-06
MX158598A (es) 1989-02-17
DE3272206D1 (en) 1986-08-28
CA1204403A (en) 1986-05-13
JPH028789Y2 (de) 1990-03-02
AU9157682A (en) 1983-08-04
ES519221A0 (es) 1984-01-01
JPH01112961U (de) 1989-07-28
EP0084630B1 (de) 1986-07-23
BR8300252A (pt) 1983-10-25

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