EP0006994B1 - Bandantriebsvorrichtung für eine Bandkassette - Google Patents

Bandantriebsvorrichtung für eine Bandkassette Download PDF

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Publication number
EP0006994B1
EP0006994B1 EP79101712A EP79101712A EP0006994B1 EP 0006994 B1 EP0006994 B1 EP 0006994B1 EP 79101712 A EP79101712 A EP 79101712A EP 79101712 A EP79101712 A EP 79101712A EP 0006994 B1 EP0006994 B1 EP 0006994B1
Authority
EP
European Patent Office
Prior art keywords
transport roller
ribbon
stripping device
transport
transport rollers
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
Application number
EP79101712A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0006994A1 (de
Inventor
Edward Frank Helinski
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.)
Lexmark International Inc
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 EP0006994A1 publication Critical patent/EP0006994A1/de
Application granted granted Critical
Publication of EP0006994B1 publication Critical patent/EP0006994B1/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
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/14—Ribbon-feed devices or mechanisms
    • B41J33/24—Ribbon-feed devices or mechanisms with drive applied directly to ribbon
    • B41J33/26—Ribbon-feed devices or mechanisms with drive applied directly to ribbon by rollers engaging the ribbon
    • 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
    • B41J33/02—Ribbon arrangements
    • B41J33/10—Arrangements of endless ribbons

Definitions

  • the invention relates to a tape drive device with two adjacent transport rollers for a tape cassette, in which a plurality of loops is formed to store the tape.
  • Such cartridges are used in particular for ribbon cartridges, preferably for continuous ribbons for typewriters and printing units. wherein the belt is conveyed into the storage chamber of the cassette by means of the pair of transport rollers, forms loops there and is pulled out at the other end of the cassette, where it reaches the printing position and is then fed back to the transport rollers.
  • An example of such an ink ribbon cassette, in which the formation of the loop is arbitrary, can be found in US Pat. No. 4,053,040.
  • the invention has for its object to provide a tape drive device with two upstream of a storage chamber of a tape cassette, side by side and circumferentially between them conveying conveyor rollers for storing the tape in a plurality of loops in the storage chamber, which with simple means the formation of loops predetermined Guaranteed length and thus enables problem-free use of the cassette with full utilization of the storage capacity.
  • This object has been achieved by the device specified in claim 1.
  • the device according to the invention is extremely simple in construction and in operation, and, by appropriately designing the stripping arrangements, it is possible to determine the size of the loops so that the storage chamber can be optimally used. and does not require any measures to guide the loops in the storage chamber. Furthermore, with the design of the cassette according to the invention an undisturbed removal of the tape is ensured with an almost uniform tape tension, for which it is particularly advantageous that the loop length by the choice of the size and the eccentricity of the transport rollers and / or the length of the stripping arrangements of the shape and Dimensions of the storage chamber can be adjusted.
  • Preferred designs for the storage or design of the transport rollers are the eccentric mounting of the transport rollers, the design with an elliptical circumferential shape or the formation of the effective circumference of the concentrically mounted transport rollers by a toothed belt of continuously changing thickness, the thickest section of the one toothed belt in each case in the clamping area lies against the thinnest section of the other timing belt.
  • the use of eccentrics for drives in tape cassettes with loops is already known from US Pat. No. 3,871,507, but the eccentrics here serve as drive elements for the generation of oscillating movements of shoe-like feed elements for the purpose of removing the tape the drive area into the storage area of the cassette.
  • the ribbon cassette shown consists of a storage chamber 10 for receiving the ribbon and a feed device 11 for feeding the ribbon into the storage chamber 10.
  • the ribbon 12 is designed as an endless loop and is pulled out of the storage chamber 10 through an outlet slot 13. This pulling out takes place under the action of a brake arrangement consisting of a piston 15 with a friction layer 16, which is pressed under the action of a spring 17 against a block 18 on the other side of the outlet slot 13.
  • the storage chamber 10 has the shape of a cuboid with a height adapted to the width of the ribbon and a length chosen taking into account the ribbon length to be recorded; it is formed by side walls 20, a rear wall 21 and upper and lower covers.
  • the feed device 11 for introducing the ink ribbon into the storage chamber 10 consists of a pair of transport rollers 30, 31 which are used to feed the ink ribbon in one. Ktemm Society 32 abut each other. In areas 33 parallel to one another (FIG. 2), the transport rollers 30; 31 recessed for receiving wipers 34. On the circumference of the transport rollers 30, 31 there are friction layers 35 to maintain the feed force to form loops of the ink ribbon 12 in the storage chamber 10.
  • wiper assemblies 36 and 37 are provided, which are formed from the comb-like wipers 34 and upper and lower wipers 38.
  • the wiper assemblies 36, 37 are preferably cast and formed in the storage chamber 10 with corresponding wiper edges in the form of radii 40 and 41, similar to the radius of the transport rollers 30 and 31.
  • Supports 39 serve to support the wipers.
  • a cutout 42 is provided in the wipers 34 to mount the transport rollers 30, 31.
  • the stripping arrangement 36 is fastened to the frame 43 by means of screws 44, while the stripping arrangement 37 is pivotably mounted on the frame about a bolt 45.
  • the stripping arrangement 37, together with the transport roller 31, is under a force directed counterclockwise around the bolt 45, that is to say towards the transport roller 30, which is exerted by a torsion spring 47 suspended on a pin 48, the other end of which is attached to a pin 49 on the frame. 43 is attached.
  • the torsion spring 47 and the pins 48 and 49 are arranged so that a knee lever effect is achieved in the clockwise direction when the wiper assembly 37 is pivoted manually. This makes it easier to insert the ink ribbon between the two transport rollers 30, 31, and: when the stripping arrangement 37 is pivoted out appropriately, it lies against a stop 50 on the frame.
  • the transport rollers 30 and 31 are stored in the associated stripping arrangements 36 and 37, respectively, by pushing them into the cutouts 42 and then inserting shafts 52 and 53, which are secured by means of securing clips 54 (FIG. 2). can be secured in the stripping arrangements 36 and 3.7.
  • the wiper assembly 36 has corresponding axial openings for the shaft 52 and a bush 56 in the upper wiper 38 and for the. Shaft 52 and the bushing 55 in the lower wiper 38.
  • the shaft 53 with the transport roller 31 is in bearings 57 and 58 within the. Scraper assembly 37 performed. If desired, the transport roller 30 can be rotatably supported in the stripping arrangement 36; then the alignment of the motor shaft and the transport roller shaft is difficult.
  • the shaft 52 is connected to the drive shaft 60 of a motor 61; for example a stepper motor, connected by means of a clamp 62.
  • a motor 61 for example a stepper motor, connected by means of a clamp 62.
  • the motor 61 therefore directly drives the transport roller 30 and the spur gear 64, which in turn drives the transport roller 31 via the spur gear 65.
  • the tooth height of the two spur gears 64 and 65 is selected so that the engagement is maintained even when the wiper assembly 37 is pivoted out against the stop 50 with the transport roller 31 to insert the ink ribbon 12.
  • FIGS. 3a to 3e The sequential formation of loops is illustrated in Figs. 3a to 3e.
  • the transport rollers 30 and 31 as well as the stripping arrangements 36 and 37 according to FIGS. 1 and 2 are only shown schematically here and the original point of contact of the transport rollers 30 and 31 in the clamping area is identified by a mark in order to show in FIGS. 3a to 3e to make clear individual phases of the transport roller rotation, in each case after a rotation by 45 °.
  • FIGS. 3a and 3b From FIGS. 3a and 3b it can be seen that in the course of the rotary movement of the transport roller 30 by 45 ° from the starting position, the circumference of the transport roller is within the radius 40 and is therefore not effective on the ink ribbon 12. The ribbon is thus loosened between the transport rollers, the inherent rigidity of the ribbon contributing to the formation of a loop to the right, that is to say in the region of the circumference of the transport roller 31.
  • FIG. 3b shows, after a rotation of the transport rollers 30, 31 by 45 °, the loop formed is approximately equal to the distance covered by the transport roller circumference.
  • the transport roller 31 transports the ink ribbon into the storage chamber 10, the ink ribbon 12 following the circumference of the transport roller 31 and promoting the formation of loops.
  • the newly formed ribbon loop reaches half the circumferential speed of the transport roller 31 in the direction of its right limit, the highest point of the circumference of the transport roller 31 now being in the 90 ° position and a reduction of the effective radius is initiated, although the peripheral surface still initially protrudes into the storage chamber 10.
  • the duration of the effectiveness of the transport rollers within the storage chamber 10 determines the size of the individual loops of the ink ribbon in the storage chamber 10.
  • the size of the loops can therefore be changed by a corresponding modification of the shape of the peripheral surfaces of the transport rollers.
  • the design of the stripping arrangements 36, 37 can also be changed, as shown in FIG. 4.
  • the stripping edge edges 67 of the stripping arrangements 36 and 37 are designed in comparison to the embodiment according to FIGS. 3a to 3e in such a way that the ink ribbon is lifted off the effective peripheral surface of the transport roller at an earlier point in time.
  • elliptical transport rollers 68 in cooperation with a stripping arrangement 69, as shown in FIG.
  • the number of loops per revolution of the transport rollers can be doubled.
  • the loops formed here are shorter, as is also indicated in FIG. 5, since the peripheral surfaces of the transport rollers 68 are in this case correspondingly shorter in contact with the ink ribbon, namely over an angle of rotation of hardly more than 90 °.
  • toothed belts 70, 71 of varying thickness are used to transport the ink ribbon 12 into the storage chamber 10.
  • the wiper edge 72, 73 extend at a slight angle from the entry area of the ink ribbon to the opposite sides of the storage chamber, and at the same angle as the outer surfaces of the toothed belts 70, 71 with respect to the inner surface from their thinnest to their thickest area.
  • Each of the toothed belts 70, 71 serves as a feed element, with the toothed belt 70 over a Drive wheel 74 and another toothed wheel 75 runs while the toothed belt 71 is guided over toothed wheels 76 and 77.
  • the toothed wheels 76 and 77 are, in a similar manner as described with reference to FIGS. 1 and 2 in connection with the transport roller 31, mounted on a frame part, not shown in Fig. 6, which under the force of a spring (also not shown) in Direction of the toothed belt 70 is pressed, whereby a clamping area 78 is formed for taking the ribbon.
  • the toothed wheel 76 is connected in drive connection to the shaft of the drive wheel 74 by a spur gear (not shown).
  • the drive wheel 74 is driven by a (not visible) motor. whereby in the course of the rotation of the toothed belt 70, its increasing thickness relative to the scraper edge 72 increasingly protrudes into the storage chamber 10 and takes the ink ribbon with it.
  • the opposite toothed belt 71 moves more and more away from the scraper edge 73, so that it is unable to exert a drive connection on the ink ribbon.
  • the arrangement shown in Fig. 6 can be designed so that the respective intersection between the effective peripheral surface of the toothed belt and the scraper edge moves at half the peripheral speed of the toothed belt.
  • the speed of this intersection can also be varied by changing the angle of the wiper edge 72, 73 with respect to the toothed belt 70 and 71, of course.
  • the ribbon loop moves at half the circumferential speed of the toothed belt.
  • FIG. 7 in contrast to the embodiments according to FIGS. 1 to 3e, only one transport roller is mounted eccentrically.
  • the transport roller 80 is mounted eccentrically as a driven roller on a shaft 81 and interacts with a transport roller 82 guided on a shaft 83.
  • the shaft 83 is supported at the end of an angle lever 84, which is pivotally mounted at the opposite end about a pin 85.
  • a tension spring 86 exerts a constant force on the angle lever 84 in such a way that the transport roller 82 rests on the transport roller 80.
  • the pivoting range of the angle lever 84 is, however, limited by a stop 87.
  • the storage chamber 93 is formed by walls 88 and 89, and the eccentric transport roller 80 interacts with a stripping arrangement 90 to form the belt loops.
  • the stripping arrangement 90 can be comb-shaped in the same way as previously described in connection with FIG. 2, the transport roller 80 having corresponding cutouts for receiving the comb parts.
  • the transport roller 82 acting as a drive is prevented by the stop 87 from following the course of the peripheral surface of the transport roller 80, so that no drive is transmitted to the transport roller 80 until the increased peripheral region of the transport roller 80 in the clamping region 92 becomes active again and the drive connection is restored between the two transport rollers 82, 80.
  • the eccentricity of the transport roller 80 is selected so that the transport rollers in the clamping area 92 are effective for feeding the ink ribbon until shortly afterwards the highest area of the eccentric transport roller 80 reaches the storage chamber 93 and pulls the ink ribbon to the right.
  • the transport rollers 80 and 82 do not need to rotate synchronously in the embodiment according to FIG. 7; because the transport roller 82, as shown in FIG. 7, is mounted concentrically.
  • the ribbon cassette shown in FIGS. 1 and 2 can be designed so that the storage chamber 10 can be removed from the feed device 11.
  • the storage chamber 10 is provided at its lower open end with flange parts 95 which are located near the periphery of the transport rollers 30, 31.
  • a lower edge 96 on the frame 43 is used to hold the storage chamber 10.
  • spring-loaded holding elements can be provided which cover the open end when the storage chamber 10 is removed, in order to prevent the ink ribbon located therein from escaping.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Advancing Webs (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP79101712A 1978-07-14 1979-06-01 Bandantriebsvorrichtung für eine Bandkassette Expired EP0006994B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US924462 1978-07-14
US05/924,462 US4212550A (en) 1978-07-14 1978-07-14 Ribbon storage mechanism having eccentrically mounted feeding elements

Publications (2)

Publication Number Publication Date
EP0006994A1 EP0006994A1 (de) 1980-01-23
EP0006994B1 true EP0006994B1 (de) 1982-06-02

Family

ID=25450228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101712A Expired EP0006994B1 (de) 1978-07-14 1979-06-01 Bandantriebsvorrichtung für eine Bandkassette

Country Status (9)

Country Link
US (1) US4212550A (it)
EP (1) EP0006994B1 (it)
JP (1) JPS584636B2 (it)
AU (1) AU521240B2 (it)
BR (1) BR7904453A (it)
CA (1) CA1107772A (it)
DE (1) DE2962991D1 (it)
ES (1) ES482171A1 (it)
IT (1) IT1162747B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1168927B (it) * 1983-05-03 1987-05-20 Ernesto Marelli Apparecchiatura per l'emulsione e l'atomizzazione di combustibili fluidi con fluidi secondari,in particolare acqua
JPS6057523U (ja) * 1983-09-26 1985-04-22 永安　信彦 パレツト
US4582439A (en) * 1984-08-01 1986-04-15 At&T Teletype Corporation Printer ribbon cartridge
US4783184A (en) * 1987-07-31 1988-11-08 Ncr Corporation Endless ribbon cassette with exit port ribbon control
JP2013256064A (ja) * 2012-06-13 2013-12-26 Oki Data Corp リボン送り装置、リボンカートリッジ及び印刷装置
CN104355154B (zh) * 2014-10-28 2016-08-31 黄学平 全自动色带绕带机
JP7117722B2 (ja) 2017-09-21 2022-08-15 大和産業株式会社 表面加工粒状物の製造装置および製造方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2685357A (en) * 1949-11-24 1954-08-03 Koreska Robert Endless ribbon feeding mechanism for typewriters
US3411686A (en) * 1966-05-25 1968-11-19 Mohawk Data Sciences Corp Paper puller
US3618869A (en) * 1970-06-30 1971-11-09 Ibm Servoing mechanism for improved typewriter ribbon spooling
US3974906A (en) * 1972-02-25 1976-08-17 Xerox Corporation Endless loop ribbon cartridge with random storage
US3871507A (en) * 1972-06-05 1975-03-18 Donald S Perry Spoolless ribbon cartridge with lift and feed features combined
US3814231A (en) * 1973-04-24 1974-06-04 Scm Corp Stuffed ribbon cartridge
US3989132A (en) * 1974-08-26 1976-11-02 General Electric Company Ribbon storage and transport mechanism
JPS5140217A (ja) * 1974-10-01 1976-04-03 Nippon Electric Co Endoresugatainkuribonkasetsuto
JPS5149253A (ja) * 1974-10-25 1976-04-28 Kamaya Kagaku Kogyo Co Ltd Goseijushiseikeibutsuni opaaruchomoyookeiseisuru hoho
JPS51127824A (en) * 1975-04-28 1976-11-08 Dezain Fuoo Asoshieetsu Printer
US4011933A (en) * 1975-10-03 1977-03-15 Xerox Corporation Ribbon drive means
US4053040A (en) * 1975-10-20 1977-10-11 Mcgourty Thomas K Serial wire matrix printer
JPS52106909A (en) * 1976-03-02 1977-09-08 Ricoh Kk Ribbon cartridge for printer
JPS53109711A (en) * 1977-03-07 1978-09-25 Hitachi Ltd Ink ribbon cassette
JPS53123216A (en) * 1977-04-01 1978-10-27 Yamura Shinkoseisakusho Kk Device for containing cassette ink ribbon
FR2391078A1 (fr) * 1977-05-17 1978-12-15 Cii Honeywell Bull Cartouche de ruban encreur pour machines imprimantes ou analogues
JPS546617A (en) * 1977-06-15 1979-01-18 Fujitsu Ltd Ribbon cartridge

Also Published As

Publication number Publication date
DE2962991D1 (en) 1982-07-22
IT7923936A0 (it) 1979-06-28
JPS584636B2 (ja) 1983-01-27
CA1107772A (en) 1981-08-25
US4212550A (en) 1980-07-15
JPS5516895A (en) 1980-02-05
IT1162747B (it) 1987-04-01
AU521240B2 (en) 1982-03-25
ES482171A1 (es) 1980-04-01
AU4685879A (en) 1980-01-17
EP0006994A1 (de) 1980-01-23
BR7904453A (pt) 1980-04-15

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