EP0013293A2 - Farbbandzufuhrvorrichtung für einen Drucker mit frühzeitiger Erkennung des Bandendes - Google Patents

Farbbandzufuhrvorrichtung für einen Drucker mit frühzeitiger Erkennung des Bandendes Download PDF

Info

Publication number
EP0013293A2
EP0013293A2 EP79103705A EP79103705A EP0013293A2 EP 0013293 A2 EP0013293 A2 EP 0013293A2 EP 79103705 A EP79103705 A EP 79103705A EP 79103705 A EP79103705 A EP 79103705A EP 0013293 A2 EP0013293 A2 EP 0013293A2
Authority
EP
European Patent Office
Prior art keywords
hub
ribbon
state
spring
deformable element
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
EP79103705A
Other languages
English (en)
French (fr)
Other versions
EP0013293B1 (de
EP0013293A3 (en
Inventor
Iii Rowland Van Dyke Firth
Willie Goff, Jr.
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 EP0013293A2 publication Critical patent/EP0013293A2/de
Publication of EP0013293A3 publication Critical patent/EP0013293A3/fr
Application granted granted Critical
Publication of EP0013293B1 publication Critical patent/EP0013293B1/de
Expired legal-status Critical Current

Links

Images

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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/36—Alarms, indicators, or feed disabling devices responsive to ink ribbon breakage or exhaustion

Definitions

  • the present invention relates to the ribbon supply in impact printers and more particularly, it relates to a ribbon supply device ensuring the detection of the exhaustion of the ribbon on the supply reel.
  • Another problem associated with the use of relatively fragile film-type ribbons for performing high speed printing relates to detecting the end of the ribbon. This problem is due to the fact that due to the brittleness of these ribbons, it is necessary to reinforce the beginning and the end of the ribbon by means of end caps, to avoid breaking the ribbon during manufacture as well as during operations. loading and unloading.
  • the material used to reinforce the ribbon does not allow printing in a high-speed printing operation, inaccuracies in the detection of the end of the ribbon often lead to the passage of the end of the ribbon not ensuring printing, in the printing position while typing several characters before detecting the end of the ribbon. This is naturally unacceptable in high speed printing devices, since this leads to the non-printing of selected characters, very often difficult if not totally impossible to catch up with.
  • the subject of the present invention is a tape feed device making it possible to precisely detect the end or exhaustion of the tape on the tape supply reel and to reduce the frictional forces opposing the rotation of this reel, forces which may cause the ribbon to break.
  • the device according to the invention comprises a reserve of ribbon wound on a hub rotating on a hub receiving element arranged coaxially with said hub.
  • An elastically deformable element is mounted in the neyeu in order to be curved by the forces exerted by the turns of ribbon wound on the hub.
  • This elastically deformable element is preferably in the form of a flat spring. This spring, when it is deformed, generates a force, a first component of which is applied against the wound ribbon which retains the spring in its deformed state, and a second component of which is directed along the axis of the hub.
  • An element, mounted movably along said axis, is kept in contact with the spring deformed by a second spring which applies to it a force also directed along the axis of the hub, but in a direction opposite to that exerted by the first spring, which allows the first and second springs to be maintained in static equilibrium as long as the first spring is retained in its deformed state by a predetermined length of ribbon remaining wound on the hub.
  • the springs are preferably chosen so that said equilibrium point is such that the supply coil, that is to say the assembly constituted by the hub and the ribbon wound on it, is lifted from the bottom of the hub receiving element to the point where the contact between the bottom of the ribbon turns and the bottom of the receiving element is minimal, in order to reduce the frictional forces exerted between these two elements and thereby reduce the tensile forces to be applied to the tape to rotate the supply reel.
  • the minimum length of rewired ribbon indicated above, capable of retaining the deformable spring in the coil hub, is only reached in the case where, practically, all of the ribbon is unwound from the hub.
  • the point of relaxation of the deformable spring is reached only when the entire strip is practically unwound from the hub.
  • Figure 1 is a partial perspective view of the ribbon supply assembly of a high speed printer in which the ribbon supply device of the present invention is shown in exploded view along the axis of rotation of the supply reel.
  • Figure 2 is a schematic sectional view of the supply coil of the assembly shown in Figure 1 and taken along line 2-2, the various elements shown in exploded form in Figure 1 being reassembled in Figure 2 and the ribbon being wound on the spool.
  • FIG. 1 there is shown the entire part of a printer necessary for the description of the device of the present invention.
  • the ribbon 102 is driven in front of a plate 101 provided with means 105 intended to hold a sheet of paper (not shown) between the ribbon 102 and the plate 101.
  • a conventional printing wheel 104 with radial tabs 103 comprising each a different character to be printed, can be rotated between the ribbon 102 and the impact means 106 which can be a hammer or any other similar means.
  • the printing wheel is rotated until the selected character carried by a tongue is in the printing position, at which time the impact means 106 is triggered to apply the tongue and the adjacent tape against the printing medium.
  • the device of the present invention can be used with any conventional tape feeding system.
  • This ribbon supply cartridge comprises a bottom 3 having a first fixed axis 20 receiving the ribbon receiving reel and a second fixed axis 21 receiving the ribbon supply reel.
  • the take-up reel 33 is driven in rotation about the axis 20 in the direction indicated by the arrow by a drive means (not shown) which can be, in a conventional manner, a drive roller in contact with the periphery of the ribbon 102.
  • the ribbon 102 is normally wound on a hub 2 installed on the assembly formed by the fixed axis 21 and by the cartridge bottom 3.
  • the ribbon-bearing hub 2 is arranged coaxially with respect to the fixed axis 21 and rotates freely around the axis 23 thereof.
  • the fixed axis 21 and the cartridge bottom 3 form a receiving unit for a ribbon-carrying hub which positions and carries the ribbon-supplying reel 34 formed from said hub 2 and from the ribbon which it carries.
  • Two grooves 35 and 35 ' are machined in the thickness of the hub 2 at the upper surface thereof.
  • a deformable spring 4 is installed in the grooves 35 and 35 '.
  • This flexible element has at each of its ends a molded guide element 5 which can slide in the grooves 35 and 35 '.
  • the guide elements 5 can open laterally out of the grooves 35 and 35 'and the spring 4 is fully relaxed.
  • the ribbon 102 is wound. on the hub 2 as seen in FIG. 2, the elements 35 and 35 ′ are forced towards the interior of the hub 2 which causes the curvature or buckling of the spring, the central part of which moves down on the Figure 2. This central depression is braked by an upwardly directed force applied by the flexible element of a conventional microswitch 13.
  • the microswitch 13 is arranged in such a way on the axis 23 that when the spring 4 is pressed into its center due to the presence of the ribbon on the hub, the force exerted downwards by this spring is braked by a switch actuating finger 7 urging the switch button 24 pushed upwards by the spring 25.
  • One end of this spring 25 is fixed to the switch housing 26 and the other end 27 urges the contact 28 pivotally mounted around the pivot 31.
  • the force which it exerts has a first component which is a lateral force applied outwards through grooves 35 and 35 ′ for applying the guide elements 5 against the strip 102, and a second component which is a force applied downwards which is opposed by the force applied upwards by the spring 25 of the microswitch 13 This latter force is transmitted upwards, as indicated by the arrows via the switch button 24 and the actuating finger 7.
  • the components along the axis 23 of the forces exerted by the spring 4 and the micro- switch 25 are chosen so that as long as there is tape on the tape hub 2, there is an equilibrium point on the axis 23 where the bottom surfaces of the hub 2 and tape 102 are sufficiently raised and cleared from the bottom of the cartridge 3 so that the friction exerted between the lower surface of the wound ribbon and the bottom of the cartridge 3 is reduced as much as possible.
  • the coil cover 9 force-fitted on the hub 2 to hold the ribbon in place has lower projections 10 which are housed in the grooves 35 and 35 'to prevent any buckling of the spring 4 towards the high.
  • the cover 9 also includes a boss 12 intended to reduce the surface of possible contact between this cover 9 and the cartridge cover 11.
  • the cartridge cover 11 is placed in a position such that a slight vertical movement of the hub 2 is on its axis 21 allowed to reduce the frictional forces on the tape, at preferred balance point described above
  • the weight will not be a factor to be considered and the aint] of equilibrium will be mainly determined by the forces exerted. by the springs.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
EP79103705A 1978-11-06 1979-09-28 Farbbandzufuhrvorrichtung für einen Drucker mit frühzeitiger Erkennung des Bandendes Expired EP0013293B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/958,212 US4213575A (en) 1978-11-06 1978-11-06 Printer ribbon supply mechanism with end of ribbon detect expedient which reduces ribbon drag
US958212 1978-11-06

Publications (3)

Publication Number Publication Date
EP0013293A2 true EP0013293A2 (de) 1980-07-23
EP0013293A3 EP0013293A3 (en) 1980-11-12
EP0013293B1 EP0013293B1 (de) 1983-04-13

Family

ID=25500728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103705A Expired EP0013293B1 (de) 1978-11-06 1979-09-28 Farbbandzufuhrvorrichtung für einen Drucker mit frühzeitiger Erkennung des Bandendes

Country Status (6)

Country Link
US (1) US4213575A (de)
EP (1) EP0013293B1 (de)
JP (1) JPS5916940B2 (de)
CA (1) CA1117889A (de)
DE (1) DE2965206D1 (de)
IT (1) IT1162787B (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544291A (en) * 1980-03-13 1985-10-01 Nippon Electric Co., Ltd. Invertible inked ribbon cartridge having two sets of feed mechanisms for an impact-serial printer
US4456193A (en) * 1981-09-16 1984-06-26 Bell & Howell Company Web advancement sensing methods and apparatus
DE3214548C1 (de) * 1982-04-20 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Transportueberwachung eines Farbbandes in einer Farbbandkassette
JPS60150057U (ja) * 1984-03-15 1985-10-05 日本電気株式会社 プリンタのリボンエンド検出機構
JPH0428788Y2 (de) * 1985-05-15 1992-07-13
DE3601483C1 (en) * 1986-01-20 1987-04-09 Triumph Adler Ag Ink-ribbon cartridge
US4925121A (en) * 1986-07-01 1990-05-15 Xerox Corporation Sensing amount of medium and medium roll malfunction in a printer
JPH0577538A (ja) * 1991-09-20 1993-03-30 Brother Ind Ltd 印字装置
US6503007B1 (en) 2001-07-27 2003-01-07 Genicom, Llc Printer ribbon motion detection system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7436550U (de) * 1975-02-27 Triumph Werke Nuernberg Ag Vorrichtung zum Umschalten der Farbbandtransportrichtung
US578919A (en) * 1897-03-16 Ink-ribbon mechanism
DE381438C (de) * 1922-01-04 1923-09-20 Rheinische Metallw & Maschf Selbsttaetige Umsteuervorrichtung fuer den Farbbandspulenantrieb
US2304216A (en) * 1939-09-29 1942-12-08 Remington Rand Inc Typewriting and like machines
US2747718A (en) * 1953-05-18 1956-05-29 Sperry Rand Corp Ribbon shift mechanism for business machines
US2760024A (en) * 1953-06-30 1956-08-21 Tunstall Spencer Bobbin signal
US2954940A (en) * 1959-02-12 1960-10-04 Adolf L Herrmann Limit switch for tape recorders
US3048254A (en) * 1959-05-01 1962-08-07 Sperry Rand Corp Ribbon mechanism for typewriter
US3112020A (en) * 1961-09-08 1963-11-26 Bishop Spools Inc Ribbon spool construction
JPS5241384U (de) * 1975-09-18 1977-03-24

Also Published As

Publication number Publication date
IT1162787B (it) 1987-04-01
JPS5581184A (en) 1980-06-18
US4213575A (en) 1980-07-22
EP0013293B1 (de) 1983-04-13
CA1117889A (en) 1982-02-09
EP0013293A3 (en) 1980-11-12
IT7926804A0 (it) 1979-10-26
JPS5916940B2 (ja) 1984-04-18
DE2965206D1 (en) 1983-05-19

Similar Documents

Publication Publication Date Title
FR2618729A1 (fr) Imprimante d'etiquettes
FR2543314A1 (fr) Magasin d'alimentation en papier de tirage photographique en bande
EP0012879B1 (de) Einmal in ihrer Laufrichtung umkehrbare Farbbandkassette für einen Stossdrucker
EP0013293B1 (de) Farbbandzufuhrvorrichtung für einen Drucker mit frühzeitiger Erkennung des Bandendes
FR2501158A1 (de)
WO1997024970A1 (fr) Appareil distributeur de materiaux d'essuyage pouvant etre distribues sous forme pliee ou non pliee
FR2608573A1 (fr) Dispositif d'arret pour appareil a enrouleur, notamment pour appareil de mesure a ruban ou laisse reglable
FR2561174A1 (fr) Imprimante thermique
EP0012878B1 (de) Farbbandantrieb, z.B. in einem Schnelldrucker
FR2604950A1 (fr) Cartouche a ruban universelle pour imprimantes grande vitesse
FR2521385A1 (fr) Cassette de ruban munie d'un dispositif pour dissiper la charge electrostatique du ruban, notamment pour appareil d'impression thermique
GB1565514A (en) Ribbon transport
FR2641495A1 (fr) Appareil d'impression et imprimante
FR2524444A1 (fr) Appareil pour faire avancer des feuilles de papier sur des machines a imprimer
EP0013294A2 (de) Mehrfachtypenscheibendruckwerk für Schreibmaschine oder Drucker
FR2468468A1 (fr) Dispositif a ruban encreur du type cassette
EP0094904B1 (de) Farbbandende-Detektor für Schreibmaschinen
FR2637882A1 (en) Mechanism for aligning sheets (webs), mechanism for feeding sheets (webs) comprising such a mechanism, and casing for holding such a feed mechanism
JP6293428B2 (ja) プリンタ
EP0094905B1 (de) Farbbandkassette für Schreibmaschinen
JP5609353B2 (ja) テープ印刷装置
WO1997046976A1 (fr) Dispositif pour delivrer des tickets formes par des tronçons de bande
FR2588537A1 (fr) Distributeur de feuilles a frottement, notamment pour copieur automatique.
EP0030624A2 (de) Farbbandkassette und ihre Verriegelungsvorrichtung an einer Schreibmaschine
EP0312411B1 (de) Vorrichtung zum Wiedereinfärben von Farbbändern in Kassetten, Flüssigkeitsverteiler, insbesondere zum Ingangsetzen der Wiedereinfärbevorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19801203

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 2965206

Country of ref document: DE

Date of ref document: 19830519

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840829

Year of fee payment: 6

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19891012

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19900531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19910601

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT